ZeuS, Sality, Chymine and Vobfus jump on the LNK vulnerability bandwagon

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Stuxnet was only the beginning. The successful exploitation of the (still unpatched) Windows LNK flaw has prompted other malware attackers to try to achieve the same results.

Luckily for us, a generic signature for this exploit method has already been added to many antivirus solutions, and the attackers have not had the time (or the inclination?) to design a new variant of the exploit.

F-Secure reports that so far, four malware families have been trying to exploit the vulnerability:

  • Chymine – a fairly new keylogger that takes advantage of the flaw to infect the computer, but does not spread further
  • Vobfus – a family of obfuscated worms that has been first spotted in 2009 and that has been using shortcut files as a social engineering technique from the start, but has previously always required users to run it.
  • Sality – a well known and popular polymorphic virus
  • ZeuS – the information stealing Trojan. F-Secure discovered a recent run of poorly written fake emails purportedly coming from security@microsoft.com, and which tries to get the users to infect their own computers by installing the Trojan disguised as a Windows patch.