Category Archives: FBI

President’s Day, Was George Washington a Spy?

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The Spymaster’s Toolkit

CIA: Long before General William Donovan recruited spies to advance the American war efforts during World War II as Director of the Office of Strategic Services (OSS), predecessor to the CIA, General George Washington mastered the art of intelligence as Commander of the Continental Army during the Revolutionary War.

Washington was a skilled manager of intelligence. He utilized agents behind enemy lines, recruited both Tory and Patriot sources, interrogated travelers for intelligence information, and launched scores of agents on both intelligence and counterintelligence missions. He was adept at deception operations and tradecraft and was a skilled propagandist. He also practiced sound operational security. Washington fully understood the value of accurate intelligence, employing many of the same techniques later used by the OSS and CIA.

As we celebrate the 284th birthday of the first American President, we highlight some of the tradecraft employed to secure our independence from the British and offer insights on its use today. Were it not for the use of secret writing, concealment devises, propaganda, and intercepted communications, there may have been a very different outcome to the War of Independence.

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SECRET WRITING

Revolutionary War: American agents serving abroad composed their intelligence reports using invisible ink. George Washington believed this would “not only render his communications less exposed to detection, but relieve the fears of such persons as may be entrusted in its conveyance.”

Communicating via invisible ink required the use of several chemical compositions. One mixture was used to write with disappearing ink, the other mixture was applied to the report to make it legible. Despite their invisible communications, it is estimated that the British intercepted and decrypted over half of America’s secret correspondence during the war.

CIA: The CIA has declassified several documents that provided recipes for making invisible ink. One recipe instructs: “Take a weak solution of starch, tinged with a little tincture of iodine. This bluish writing will soon fade away.” A mixture for exposing secret writing included “iodate of potassium, 5 grams, with 100 grams of water, and 2 grams of tartaric acid added” but warned, “run a hot iron over the surface being careful not to scorch the paper.”

During the Cold War, a major advancement in secret writing technology was the shift from liquid invisible inks to dry systems. The KGB was one of the first foreign intelligence services to employ a dry method. The CIA’s Office of Technical Services in the Directorate of Science and Technology spent considerable time researching Soviet systems and finally succeeded not only in “breaking” them, but in anticipating where its KGB counterpart would go next in the never-ending search for more secure systems. By the end of the Cold War, a kind of tacit convergence had emerged as both sides applied new techniques that used very small, almost undetectable quantities of chemical in secret writing messages. In the words of one CIA chemist, it was like “uniformly spreading a spoonful of sugar over an acre of land.”

CONCEALMENT DEVISES

Revolutionary War: Agents used a variety of modified objects to conceal their secret messages.  One device was a wafer-thin lead container that would sink in water, or melt in fire, thus destroying its contents. The device was small enough that an agent could swallow it if no other means of discarding were available. This was done as a last resort as ingestion was typically followed by a severe bout of lead poisoning. The lead container was eventually replaced by a silver, bullet-shaped container that could be unscrewed to hold a message and which would not poison a courier who might be forced to swallow it.

CIA:  A concealment devise can be any object used to clandestinely hide things. They are typically ordinary, every-day objects that have been hollowed out. The best concealment devises are ones that blend in with their surroundings and call no attention to themselves. They can be used to hide messages, documents, or film. Some examples of concealment devises include hollowed out coins, dead-drop spikes, shaving brushes, and makeup compacts.

PROPAGANDA

Revolutionary War: During the American Revolution, the British had a shortage of soldiers so they hired almost 30,000 German Hessian auxiliary forces to fight against the Americans. The Continental Congress devised a propaganda campaign to encourage the Hessian mercenaries to defect to America. The campaign included offering land grants to those mercenaries fighting for the British on American soil. The offers were written in German on leaflets disguised as tobacco packets. A mock-defector ran through the mercenaries’ camps encouraging others to defect as well. As part of the campaign, Benjamin Franklin forged a letter to the commander of the Hessians, “signed” by a German prince. The letter instructed the commander to let the wounded mercenaries die. This dealt a blow to the morale of the Hessians. Between 5,000 and 6,000 Hessian mercenaries deserted from the British, in part because of American propaganda.

CIA: Propaganda campaigns use communication to alter a population’s beliefs and views thus influencing their behavior. There are three types of propaganda: white, black, and grey. White propaganda openly identifies the source and uses gentle persuasion and public relations techniques to achieve a desired outcome. For example, during the Persian Gulf War, the CIA airdropped leaflets before some Allied bombing runs to allow civilians time to evacuate and encourage military units to surrender. Black propaganda, on the other hand, is misinformation that identifies itself with one side of a conflict, but is truly produced by the opposing side – like Franklin sending the letter “from” a German prince. Grey propaganda is the most mysterious of all because the source of the propaganda is never identified.

INTERCEPTED COMMUNICATIONS

Revolutionary War: The Continental Congress regularly received quantities of intercepted British mail. General Washington proposed to “contrive a means of opening them without breaking the seals, take copies of the contents, and then let them go on. By these means we should become masters of the whole plot.”

CIA: Clandestinely opening, reading and resealing envelopes or packages without the recipient’s knowledge requires practice. ‘Flaps and seals’ opening kits were used in the 1960s. A beginner’s kit offered the basic tools for surreptitious opening of letters and packages. Once mastered, an advanced kit with additional tools was used. Many of the tools were handmade of ivory and housed in a travel roll.

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Washington employed the use of many other intelligence gathering techniques still in use today to secure our independence and freedom from Great Britain. Not only is he The Father of His Country, but he is heralded as a great spymaster. Upon the conclusion of the Revolutionary War, a defeated British intelligence officer is quoted as saying, “Washington did not really outfight the British. He simply out-spied us.”

The Next Border Fence

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Apparently, they do work and have some significant value, in Europe that is. With the constant flow of migrants, several major problems have literally cracked the security of countries.  Further, there are no signs that migrants flowing into Europe will wane or stop at all, so the true costs in 2016 or beyond. The immigration flood in Europe is a clarion call to the United States as the issues are virtually the same. Not only is the United States taking in Middle Eastern refugees, but we have been taking in Cubans, Mexicans, as well as Central and South Americans. For America is goes much further that a trifecta and costs and security.

Anti-migrant force builds in Europe, hurting Merkel’s quest

WARSAW, Poland (AP) — So where should the next impenetrable razor-wire border fence in Europe be built?

Hungary’s right-wing Prime Minister Viktor Orban thinks he knows the best place – on Macedonia’s and Bulgaria’s borders with Greece – smack along the main immigration route from the Middle East to Western Europe. He says it’s necessary because “Greece can’t defend Europe from the south” against the large numbers of Muslim refugees pouring in, mainly from Syria and Iraq.

The plan is especially controversial because it effectively means eliminating Greece from the Schengen zone, Europe’s 26-nation passport-free travel region that is considered one of the European Union’s most cherished achievements.

Orban’s plan will feature prominently Monday at a meeting in Prague of leaders from four nations in an informal gathering known as the Visegrad group: Hungary, Poland, the Czech Republic and Slovakia. The Visegrad group, formed 25 years ago to further the nations’ European integration, is marking that anniversary Monday. Still, it has only recently found a common purpose in its unified opposition to accepting any significant number of migrants.

This determination has emboldened the group, one of the new mini-blocs emerging lately in Europe due to the continent’s chaotic, inadequate response to its largest migration crisis since World War II. The Visegrad group is also becoming a force that threatens the plans of German Chancellor Angela Merkel, who wants to resettle newcomers across the continent while also slowing down the influx.

“The plan to build a new “European defense line” along the border of Bulgaria and Macedonia with Greece is a major foreign policy initiative for the Visegrad Four and an attempt to re-establish itself as a notable political force within the EU,” said Vit Dostal, an analyst with the Association for International Affairs, a Prague based think tank.

At Monday’s meeting, leaders from the four nations will be joined by Macedonian President Gjorge Ivanov and Bulgarian Prime Minister Boiko Borisov so they can push for the reinforcements along Greece’s northern border. Macedonia began putting up a first fence in November, and is now constructing a second, parallel, fence.

“If it were up only to us Central Europeans, that region would have been closed off long ago,” Orban said at a press conference recently with Poland’s prime minister. “Not for the first time in history we see that Europe is defenseless from the south … that is where we must ensure the safety of the continent.”

Poland has indicated a willingness to send dozens of police to Macedonia to secure the border, something to be decided at Monday’s meeting.

“If the EU is not active, the Visegrad Four have to be,” Slovak Prime Minister Robert Fico said recently. “We have to find effective ways of protecting the border.”

The leaders will try to hash out a unified position ahead of an important EU meeting Thursday and Friday in Brussels that will take up both migration and Britain’s efforts to renegotiate a looser union with the EU. The Visegrad countries have also recently united against British attempts to limit the welfare rights of European workers, something that would affect the hundreds of thousands of their citizens who now live and work in Britain.

The anti-migrant message resonates with the ex-communist EU member states, countries that have benefited greatly from EU subsidies and freedom of movement for their own citizens but which now balk at requests to accept even small numbers of refugees. The Visegrad nations maintain it is impossible to integrate Muslims into their societies, often describing them as security threats. So far the Poles, Czechs and Slovaks have only accepted small numbers, primarily Christians from Syria.

Many officials in the West are frustrated with what they see as xenophobia and hypocrisy, given that huge numbers of Poles, Hungarians and other Eastern Europeans have received refuge and economic opportunity in the West for decades.

Indeed there are plenty of signs that the countries are squandering a lot of the good will that they once enjoyed in the West for their sacrifices in throwing off communism and establishing democracies.

Orban’s ambitions for Europe got a big boost with the rise to power last year in Poland of the right-wing Law and Justice party, which is deeply anti-migrant and sees greater regional cooperation as one of its foreign policy priorities. Polish Prime Minister Beata Szydlo’s government says it wants to do more to help Syrian refugees at camps in Turkey and elsewhere while blocking their entry into Europe.

Although Orban is alienating Greek authorities, who are staggering under the sheer numbers of asylum-seekers crossing the sea from Turkey in smugglers’ boars, he insists he must act as a counterweight to Western leaders, whom he accuses of creating the crisis with their welcoming attitude to refugees.

“The very serious phenomenon endangering the security of everyday life which we call migration did not break into Western Europe violently,” he said. “The doors were opened. And what is more, in certain periods, they deliberately invited and even transported these people into Western Europe without control, filtering or security screening.”

Dariusz Kalan, an analyst at the Polish Institute of International Affairs, said he doesn’t believe that the Visegrad group on its own can destroy European unity but says Orban’s vision is winning adherents across the continent in far-right movements and even among mainstream political parties.

“It’s hard to ignore Orban,” Kalan said. “People in Western Europe are starting to adopt the language of Orban. None are equally tough and yet the language is still quite similar.”

Cuban Migrants Flood the SW Border

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2015: At Least 44,000 Cubans Entered US Through Texas and Southern Border This Year, Number on the Rise – Report

The number of Cubans attempting to come to the Unites States via Texas has increased this year, thanks in large part to the thaw in political tensions between the U.S. and Cuba.

 

After President Obama and Cuban leader Raul Castro announced their plans to normalize relations between the two nations, many Cubans feared that the special migrant status they have enjoyed for over 50 years would come to an end. The current “wet foot, dry foot policy” allows anyone who has fled Cuba and entered the U.S. the ability to pursue residency and work in the country.

The Los Angles Times reports that at least 44,000 Cubans have reached the southern U.S. border during the fiscal year which ended in September. This figure is more than twice as many of the 17,466 Cubans who came through the southern border the year before. Full article here.

Tension Simmers as Cubans Breeze Across U.S. Border

LAREDO, Tex. — They are crossing the border here by the hundreds each day, approved to enter the United States in a matter of hours. Part of a fast-rising influx of Cubans, they walk out to a Laredo street and are greeted by volunteers from Cubanos en Libertad, or Cubans in Freedom, who help them arrange travel to their American destination — often Miami — and start applying for work permits and federal benefits like food stamps and Medicaid, available by law to Cubans immediately after their arrival.

The friendly reception given the Cubans, an artifact of hostile relations with the Castro government, is a stark contrast with the treatment of Central American families fleeing violence in their countries. And it is creating tensions in this predominantly Mexican-American city, where residents saw how Central American migrants, who came in an influx in 2014, were detained by the Border Patrol and ordered to appear in immigration courts.

“The people here are starting to feel resentment,” said Representative Henry Cuellar, Democrat of Texas, whose congressional district includes the city. “They are asking, is it fair that the Cubans get to stay and the Central Americans are being deported?”

The disparity will be in sharp relief next week when Pope Francis comes to the border at El Paso to offer prayers for the many migrants who have faced danger or arrest trying to cross the United States border.

Town officials have warned Cubans not to loiter in the streets. Local bus companies complain that Cubans are chartering special vans to travel. Some residents here have also begun to speak up.

A group of veterans from Afghanistan and Iraq held two protests by the border bridge in recent weeks, saying the federal government was spending money on Cubans when it was not meeting the needs of people here.

“We make everyone from Central America wait in line, while the Cubans walk in even though they are not refugees,” said Gabriel Lopez, a Mexican-American Navy veteran who is president of the group of veterans. “We are saying, don’t open the borders to Cubans and give them instant benefits while we have American veterans living on the streets.”

In coming weeks the number of Cubans is expected to spike, as more than 5,000 who have been stalled in Costa Rica since late last year will leave there on regular plane flights agreed to by governments in Central America and Mexico. Already about 12,100 Cubans entered through Laredo and other Texas border stations in the last three months of 2015, according to official figures. Border officials say as many as 48,000 Cubans could cross here this year, more than all those who came in the last two years combined.

Under the Cuban Adjustment Act, a law Congress passed in 1966 in the early years of enmity with Fidel Castro, any Cuban who sets foot on American soil is given permission to enter, known as parole. Cubans are also eligible for federal welfare benefits including financial assistance for nine months under separate policies from the 1980s. After a year, they can apply for permanent residency, a gateway to citizenship.

The recent exodus from Cuba began in mid-2014, even before President Obama in December of that year announced a restoration of diplomatic relations with the government, now led by Mr. Castro’s brother Raúl. In a major change, President Raúl Castro allowed Cubans to leave the country without exit visas. Many Cubans have said that rumors that the special entry to the United States would be canceled had caused them to pack up and go.

“The rumors are unfounded,” Alan Bersin, assistant secretary of Homeland Security, said in an interview, seeking to dispel the fears. “The Cuban Adjustment Act is still in effect and is part of the overall immigration policy and there is no intent presently to change that.”

Mr. Cuellar has called for the act to be repealed, but he acknowledges there is little prospect that Congress will act this year.

The recent influx is nothing like the chaotic rush of Cubans fleeing the Communist government that overwhelmed South Florida with the Mariel boatlift in 1980, and the rafter crisis in 1994. The federal border authorities, who have been watching the number of Cubans growing steadily, added officers and opened extra rooms in the border station, doubling their capacity to process them. Most Cubans move through in less than an hour, officials said.

Frank Longoria, assistant director of field operations for United States Customs and Border Protection, said that despite their numbers, the Cubans’ entry has not affected the huge flows of people and freight trucks each day through Laredo, the country’s largest land port of entry.

At the border, Cubans are fingerprinted and pass through routine criminal and terrorism background checks. There is no special vetting for Cubans, and there are no medical examinations or vaccination requirements.

“Right now I feel like the freest Cuban in the whole world,” said Rodny Nápoles, 39, a coach of the Cuban national women’s water polo team who crossed into Laredo this week.

This week, the first direct flights from northern Costa Rica to the Mexican city just across the border brought more than 300 Cubans, including at least 41 pregnant women and their families.

One of them, Yadelys Rodríguez Martín, 28, who was 19 weeks pregnant, sat down to rest and enjoy a moment of relief on the front steps of Cubanos en Libertad, right after emerging from the border station. After traveling through Ecuador and being stuck for three months in Costa Rica because of a political dispute in the region, she said she was stunned by how quickly she had been admitted into the United States.

“We are not used to things happening so fast,” Ms. Rodríguez said.  More here.

Facts: Mexico to U.S. Immigration

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Unaccompanied Alien Children Charged in Execution-Style Murder, Media Calls Them “Baby-Faced Boys”

It appears that the recent execution-style murder of a Massachusetts man was committed by two Central American teens that came to the U.S. as Unaccompanied Alien Children (UAC) under President Obama’s open border free-for-all. Tens of thousands of illegal immigrant minors—mostly from El Salvador, Guatemala and Honduras—have entered the country through the Mexican border since the influx began in the summer of 2014 and the administration has relocated them nationwide.

News reports indicate that the 17-year-olds charged in the gruesome Massachusetts killing entered the U.S. recently as UAC’s and both have ties to MS-13, according to authorities cited by various outlets. They lived in Everett and one of the teens, Cristian Nunez-Flores, moved to Massachusetts from his native El Salvador a year and a half ago which is when the influx of Central American minors began. His parents remain in El Salvador, according to a local news article. The other gangbanger’s name is Jose Vasquez Ardon and he too is a recent arrival from Central America. Prosecutors say the teens, described in a local news article as “baby-faced boys,”shot a 19-year-old in the head. Both are being held without bail for obvious reasons. A must read summary here.

*** Meanwhile***

5 facts about Mexico and immigration to the U.S.

PewResearch: Pope Francis is expected to make immigration a major theme of his visit to Mexico. By traveling northward across Mexico, he intends to symbolically retrace the journey of Mexican and Central American migrants traveling to the United States. After the pope leaves Mexico City, his route will begin in the southern state of Chiapas, which shares a long border with Guatemala, and end in Ciudad Juárez, located across the U.S.-Mexico border from El Paso, Texas, a longtime entry point to the U.S.

U.S. immigration from Latin America has shifted over the past two decades. From 1965 to 2015, more than 16 million Mexicans migrated to the U.S. in one of the largest mass migrations in modern history. But over the past decade, Mexican migration to the U.S. has slowed dramatically. Today, Mexico increasingly serves as a land bridge for Central American immigrants traveling to the U.S.

Here are five facts about Mexico and trends in immigration to the U.S.

1Mexico increases deportations of Central AmericansMexico is stopping more unauthorized Central American immigrants at its southern border. The Mexican government said in 2014 that it would increase enforcement at its southern border in response to an increased flow of Central Americans traveling through Mexico to reach the U.S. In 2015, the government there carried out about 150,000 deportations of unauthorized immigrants from El Salvador, Guatemala and Honduras, a 44% jump over the previous year. These three Central American countries alone accounted for nearly all (97%) of Mexico’s deportations in 2015.

2Despite increased enforcement by Mexico, many unauthorized Central Americans are still reaching the U.S. via Mexico. At the U.S.-Mexico border, the number of families and unaccompanied children apprehended by U.S. Customs and Border Protection officials is again rising, though it’s too early to tell how 2016 will compare with prior years. From Oct. 1, 2015, to Jan. 31, 2016, 24,616 families and 20,455 unaccompanied children – the vast majority of them from Central America – were apprehended at the southwestern U.S. border, double the total from the same time period the year before. Apprehensions of unaccompanied children rose to record levels in fiscal 2014, then decreased by 42% in fiscal 2015.

3More Cubans are also traveling through Mexico to reach the U.S. The number of Cubans migrating through Mexico to reach the U.S. spiked dramatically last year after President Barack Obama said the U.S. would renew ties with the island nation. In fiscal 2015, 43,159 Cubans entered the U.S. via ports of entry, a 78% increase over the previous year. Two-thirds of these Cubans arrived through the U.S. Border Patrol’s Laredo Sector in Texas. (Cubans who pass an inspection can enter the U.S. legally under the Cuban Adjustment Act of 1966.)

4Fewer Mexicans are migrating to the U.S. today than in the past. In fact, more Mexicans left than came to the U.S since the end of the Great Recession. Between 2009 and 2014, 870,000 Mexican nationals left Mexico to come to the U.S., down from the 2.9 million who left Mexico for the U.S. between 1995 and 2000. Of those moving back to Mexico, many cite family as the reason for their return. About 1 million Mexican immigrants and their U.S.-born children moved from the U.S. to Mexico between 2009 and 2014, and 61% said they had done so to reunite with family or to start a family, according to the 2014 Mexican National Survey of Demographic Dynamics.

5More Mexicans now say life is about the same in the U.S. and Mexico. In 2015, 33% of Mexican adults said life in the U.S. is neither better nor worse than life in Mexico, up from 23% who said this in 2007. Still, about half of Mexican adults believe life is better in the U.S. and 35% of Mexicans said they would move to the U.S. if they had the opportunity and means to do so, similar shares as in 2009.

It was not a Hardware Issue, it was a Cyber Intrusion, IRS

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IRS Confirms It Was a Victim of an Automated Attack

The attack, which occurred in January, targeted the electronic filing PIN application form on the IRS.gov Website. Experts said there are lessons to be learned.

eWeek: The U.S. Internal Revenue Service (IRS) is gearing up for another busy tax season, and it appears that hackers are getting ready, too. On Feb. 9, the IRS confirmed that it was the victim of an automated attack in January that targeted the electronic filing PIN application form on the IRS.gov Website.According to the IRS, attackers made use of personal information, including Social Security numbers, that was stolen from other non-IRS Websites. The attackers then used that information in an attempt to generate fraudulent E-File PIN numbers on IRS.gov. With a PIN number, an attacker could have potentially been able to file a tax return or gain access to other taxpayer information.The IRS investigation has found that 464,000 unique Social Security numbers (SSNs) were used in the attack, with 101,000 being successfully able to access the E-File PIN. The IRS is emphasizing that it has halted the attack and is contacting those who are affected.”No personal taxpayer data was compromised or disclosed by IRS systems,” the agency stated. “The IRS also is taking immediate steps to notify affected taxpayers by mail that their personal information was used in an attempt to access the IRS application.”

In May 2015, the IRS reported that its Get Transcript service was attacked. Get Transcript enables users to get information about their tax account transactions. As is the case with the new attack against the E-File PIN, the Get Transcript service attack involved user information that was stolen from third-party sites. The success rate for the Get Transcript attackers, however, was higher than it was for the E-File PIN attackers, where 100,000 out of 200,000 hack attempts were successful.

Security experts contacted by eWEEK are not surprised that the IRS is once again reporting an attack against its systems. The fact that the IRS.gov site was attacked with SSNs stolen from other third-party sites is, however, somewhat ironic.”One of the most successful ways hackers steal citizens’ Social Security numbers is through fraudulent phishing emails or phone calls that appear to be from the IRS,” Darren Guccione, CEO and co-founder of Keeper Security, told eWEEK.

Hackers know the public is terrified of being identity-theft victims and exploit this fear well, often by telling someone they’ve been a victim already and asking for their Social Security number, Guccione noted.Lance James, chief scientist at Flashpoint, commented that one of the big concerns he sees with the latest IRS attack is the continued reliance on Social Security numbers. “We need to rethink what a Social Security number means these days when it comes to accessing data,” James told eWEEK. “It should not be the administrator password for a person’s life.”Andy Hayter, security evangelist at G DATA Software, also commented on the risks associated with SSN disclosure. Every bit of an individual’s personally identifiable information that is collected via a breach is one more piece of information that can, and someday will, be used against a person, he said.
“As long as information such as Social Security numbers is used as identification, we will have bad actors trying to collect as much information about individuals to do harm, either through theft or worse,” Hayter told eWEEK.Inga Goddijn, executive vice president at Risk Based Security, noted that taxpayers should be concerned that questionable security practices at organizations completely unrelated to the IRS have the potential of affecting their tax returns.

Though the IRS has stated that no personal taxpayer data was compromised or disclosed in the new attack, JP Bourget, CEO of Syncurity, noted that there is still a real risk.”While maybe the IRS can in the end prevent any bad outcomes for taxpayers, I can imagine a few scenarios where a bad guy attempts to file a tax return for a refund that then holds up a valid refund to someone who is owed a refund, and even depending on that refund,” Bourget told eWEEK. “There’s also the angle of now your account is flagged and the uncertainty of how that affects a taxpayer over time and what hidden costs may arise from that.”One potentially positive outcome that could result from the IRS attack is that lessons learned could help prevent the next attack. Goddijn said that it would be helpful if the IRS can share more detail as to how the agency detected the attack and ideas for preventing these types of enumeration attacks in the future. She added that the U.S. government has been pushing for more threat intelligence sharing and improved security practices for all organizations.”Why not take this opportunity to lead the charge and share more about the attack with the security community,” Goddijn said. “That may help stop the next, similar assault on a high-value target.”

In 2015:

USAToday: Criminals hacked into an Internal Revenue Service website and gained access to approximately 100,000 tax accounts, the agency said Tuesday. Another 100,000 attempts were made but were not successful.

The attack appears to have first begun in February, the agency said.

The hackers got in by taking information about taxpayers they’d acquired from other sources and using it to correctly answer several personal identity verification questions in the IRS’ “Get Transcript” application, the IRS said in a statement.

This allowed them to get information about tax accounts through the application. The information stolen included Social Security information, date of birth and street address.

The Get Transcript application allows users to view their tax account transactions, line-by-line tax return information or wage and income reported to the IRS for a specific tax year. It was used to securely retrieve approximately 23 million taxpayer transcripts last year, the IRS said.

The information the hackers used to get in was probably previously stolen by other hackers who then sold it on the open market, said Rob Roy, chief technology officer of HP Enterprise Security Products.

The hackers who bought it “appear to have hired an army of people to submit over 200,000 queries into the IRS site over a period of four months. Not exactly a quick and easy operation,” he said.

“The matter is under review by the Treasury Inspector General for Tax Administration as well as the IRS’ Criminal Investigation unit, and the ‘Get Transcript’ application has been shut down temporarily,” the IRS said.

The agency will provide free credit monitoring services for the approximately 100,000 taxpayers whose accounts were accessed.

The theft was discovered late last week when IRS staff noticed unusual activity on the application. Further investigation showed that attempts were made beginning in February.

The breach does not involve the main IRS computer system that handles tax filing submissions. “That system remains secure,” the IRS said.

“The IRS historically has been very security, it has to be by virtue of the data it collects. But it just goes to show that even the most secure system can be attacked,” said Larry Ponemon of the Ponemon Institute, a data security research group.