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  3. JS.Phremous


Risk Level 1: Very Low

April 30, 2012
May 2, 2012 11:12:14 PM
Infection Length:
4,866 bytes
Systems Affected:
Linux, Mac OS X, Solaris, Windows 2000, Windows 7, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Server 2008, Windows Vista, Windows XP
JS.Phremous is a worm that copies itself to removable drives and network shares and may also download potentially malicious files.

Antivirus Protection Dates

  • Initial Rapid Release version April 27, 2012 revision 021
  • Latest Rapid Release version February 19, 2013 revision 016
  • Initial Daily Certified version April 27, 2012 revision 033
  • Latest Daily Certified version May 2, 2012 revision 034
  • Initial Weekly Certified release date May 2, 2012
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low
  • Payload: Hides folders and creates link files with the same name. May download potentially malicious files.


  • Distribution Level: Low
  • Shared Drives: Copies itself to removable drives and network shares.
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: Nino Fred Gutierrez

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