Skype Worm in the Wild – W32.Chatosky

Use Netsparker


A new worm is spreading fast on the Skype network, it’s activated by a malicious Skype Chat link and it has been seen in the wild in numerous places.

Apparently the dangerous link starts with “Check this!” pointing to a .org/.biz address, if you click the link you’ll become infected.

There have been no reports of unpatched issues with Skype so the vector for the attack at present is unknown, after discussion with the Skype developers it’s found the Trojan is using features from the Skype API to propogate, so there is no flaw in Skype.

The end-user who is running Skype does get notified that a program is attempting to access it and must acknowledge it.

From Websense the details we have are:

  • The filename is sp.exe
  • Assuming the file is run it appears to drop and run a password stealing Trojan Horse
  • The file also appears to run another set of code that uses Skype to propagate the original file
  • The file is packed and has anti-debugging routines (NTKrnl Secure Suite packer)
  • The file connects to a remote server for additional code
  • The original site has been black holed and is not serving the code anymore
  • The original infections appear to be in APAC region (Korea in particular)

It appears that Symantec uses name W32.Chatosky when they released a description document about the worm.

The malware queries Skype for random users every three minutes and an error message is being displayed if there is no Skype installed to the system.

As always be wary :)

Posted in: Malware, Networking Hacking

, , ,


Latest Posts:


Acunetix v12 - Pause & Resume Acunetix v12 – More Comprehensive More Accurate & 2x Faster
Acunetix, the pioneer in automated web application security software, has announced the release of Acunetix v12 - more comprehensive, accurate & 2x faster.
CloudFrunt - Identify Misconfigured CloudFront Domains CloudFrunt – Identify Misconfigured CloudFront Domains
CloudFrunt is a Python-based tool for identifying misconfigured CloudFront domains, it uses DNS and looks for CNAMEs which may be allowed to be associated with CloudFront distributions.
Airbash - Fully Automated WPA PSK Handshake Capture Script Airbash – Fully Automated WPA PSK Handshake Capture Script
Airbash is a POSIX-compliant, fully automated WPA PSK handshake capture script aimed at penetration testing, it is compatible with Bash and Android Shell.
XXEinjector - Automatic XXE Injection Tool For Exploitation XXEinjector – Automatic XXE Injection Tool For Exploitation
XXEinjector is an XXE Injection Tool that automates retrieving files using direct and out of band methods. Directory listing only works in Java applications.
Yahoo! Fined 35 Million USD For Late Disclosure Of Hack Yahoo! Fined 35 Million USD For Late Disclosure Of Hack
Ah Yahoo! in trouble again, this time the news is Yahoo! fined for 35 million USD by the SEC for the 2 year delayed disclosure of the massive hack, we actually reported on the incident in 2016 when it became public.
Drupwn - Drupal Enumeration Tool & Security Scanner Drupwn – Drupal Enumeration Tool & Security Scanner
Drupwn is a Python-based Drupal Enumeration Tool that also includes an exploit mode, which can check for and exploit relevant CVEs.


Comments are closed.