Symantec.com > Enterprise > Security Response > Trojan.Laorenshen

Trojan.Laorenshen

Risk Level 1: Very Low

Discovered:
July 9, 2003
Updated:
February 13, 2007 12:03:36 PM
Also Known As:
W32.Laorenshen.Trojan, Trojan.Win32.Laoshen.a [Kasper, Laoren [McAfee], TROJ_LARENSHEN.A [Trend Micro], Troj/Laoshen-A [Sophos]
Type:
Trojan Horse
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

Trojan.Laorenshen is a Trojan Horse that tries to delete files and block the use of the computer's normal programs. It is compressed with UPX and ASPack.

Antivirus Protection Dates

  • Initial Rapid Release version July 10, 2003
  • Latest Rapid Release version October 6, 2011 revision 001
  • Initial Daily Certified version July 10, 2003
  • Latest Daily Certified version October 6, 2011 revision 003
  • Initial Weekly Certified release date July 16, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

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

Damage

  • Damage Level: Medium

Distribution

  • Distribution Level: Low
Writeup By: Jari Kytojoki

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