5 Greatest Hacks of the World

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CitiBank Robbery in  1995


In 1995 Russian geek and graduate of St. Petersburg Tekhnologichesky University Vladimir Levin hacked CitiBank servers and transfered around $10.7 million into various accounts in USA,Finland,Holland,Germany and Israel.

Levin used a laptop computer in London, England, to access the Citibank network, and some how obtained a list of customer codes and passwords. Then he logged on 18 times over a period of weeks and transferred $10.7 million through wire transfers to accounts his group controlled in the United States, Finland,the Netherlands, Germany, and Israel. Citibank later retrieved all but about $400,000.

When Citibank noticed the transfers, they contacted the authorities, who tracked Levin down and arrested him at a London airport in March, 1995. He fought extradition for 30 months, but lost, and was transferred to the US for trial. He was convicted and sentenced to three years in jail, and ordered to pay Citibank $240,015. Four members of Levin’s group pleaded guilty to conspiracy to commit bank fraud, and served various sentences.

After the compromise of their system, Citibank updated their systems to use Dynamic Encryption Card, a physical authentication token. Following his arrest in 1995, anonymous members of hacking groups based in St. Petersburg claimed that Levin did not have the technical abilities to break into Citibank’s systems, that they had cultivated access to systems deep within the bank’s network, and that these access details had been sold to Levin for $100.

Timothy Lloyd’s Code Bomb

This USA hacker wrote six lines of code called logic bomb and installed it on Omega Engineering Corporation’s systems. Omega Engineering is primary supplier of components to US navy and NASA. Lloyd’s code bomb deleted Omega’s design and production programs causing loss of almost $10 million.

Lloyd’s worked with Omega Engineering for almost 11 years as a network administrator and according to stories he was fired back in 1996 because of his unavoidable attitude with peers. July 31st, 1996 was the date when Lloyd’s code bomb exploded in response to one of Omega’s employee logging in to the system. Code deleted or corrupted Omega’s production and design programs and this hack is considered largest worker-related computer sabotage.

He was convicted in USA court and was put behind bar for several years.

Robbery of Navy Missile Codes


In 2001, Unknown hackers logged into a computer at a Navy research facility in Washington and stole the source codes to a missile guidance program.

Representatives of Exigent Software Technology, based in Melbourne, claimed that they built the stolen program, called “OS/COMET.” The Air Force has installed OS/COMET, which can also be used to guide satellites and spacecraft, to a Global Positioning Satellite system in Colorado Springs, Colo., according to Exigent.

The software was secret when it was first used in the 1980s, but is now sold commercially. He said the intruder only got about two-thirds of the source codes.

Melissa Virus

The Melissa virus was the first of its kind to wreak damage on a global scale. Written by David Smith (then 30), Melissa spread to more than 300 companies across the world completely destroying their computer networks. Damages reported amounted to nearly $400 million. Smith was arrested and sentenced to five years in prison.



MafiaBoy, whose real identity has been kept under wraps because he is a minor, hacked into some of the largest sites in the world, including eBay, Amazon and Yahoo between February 6 and Valentine’s Day in 2000. He gained access to 75 computers in 52 networks, and ordered a Denial of Service attack on them. He was arrested in 2000.

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  • Basti621

    where is the i love u virus?

  • olorin_

    Timothy Lloyd? That's Richard Matthew Stallman of the Free Software Foundation, known for the GNU operating system and the GPL licenses. If you plan to fabricate pictures, you have to do a better job and use a less profiled person.

  • Admin

    Mistake realized and pic removed thanks

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