1260 (computer virus)

1260, or V2PX,[1][2] was a demonstration computer virus written in 1989 by Mark Washburn that used a form of polymorphic encryption. Derived from Ralph Burger's publication of the disassembled Vienna Virus source code, the 1260 added a cipher and varied its signature by randomizing its decryption algorithm. Both the 1260 and Vienna infect .COM files in the current or PATH directories upon execution. Changing an authenticated executable file is detected by most modern computer operating systems.[3][4][5]

Common name1260
Technical name1260
SubtypeNonresident .COM-Infector
Point of isolationUnknown
Point of originUnknown
Author(s)Mark Washburn


  1. "Threat Assessment of Malicious Code and Human Threats," History of Viruses, National Institute of Standards and Technology, Computer Security Division, internal report.
  2. "IBM's PC "Virus Timeline,"". research.ibm.com. Archived from the original on 27 October 2012.IBM research report.
  3. McAfee Labs Threat Center, Details and results of V2PX virus analysis.
  4. "Patricia Hoffman's VSUM Virus Information Summary List," V2P6 virus.
  5. "1260 (computer virus)," article.

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