Virus Profile: W32/YahLover.worm!a!a9f7b195fccb

Threat Search
Print
   
Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 10/21/2009
Date Added: 10/21/2009
Origin: Unknown
Length: 1032890
Type: Virus
Subtype: -
DAT Required: 5778
Removal Instructions
   
 
 
   

Description

This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then further propagate the virus. Although many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.

Indication of Infection

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Methods of Infection

Viruses are self-replicating. They are often spread by a network or by transmission to a removable medium such as a removable disk, writable CD, or USB drive. Viruses may also spread by infecting files on a network file system or a file system that is shared by another computer.

   

Virus Characteristics

File PropertyProperty Value
FileName!itw#143.exe
McAfee ArtemisArtemis!a9f7b195fccb
McAfee DetectionW32/YahLover.worm!a
Length1,032,890 bytes
CRC41752A17
MD5A9F7B195FCCB3598BAD988F7E4AD4DBF
SHA152255413C0D92CAB0C07621D6E46213B3D82B9B8

Other Common Detection Aliases

Company NameDetection Name
ahnlabWin-Trojan/InfoStealer.1032890
avastAutoIt:AutoRun-B2 [Wrm]
AVG (GriSoft)Generic_c.BATG
AviraDR/Autoit.aar
BitDefenderTrojan.Generic.IS.600318
clamavINF.Autorun-32
EMSI SoftwareTrojan.Win32.Ircbrute!IK
eSafe (Alladin)suspicious Trojan/Worm [101]
EsetWin32/AutoRun.Autoit.BG
FortiNetW32/Sohanad.S!tr
F-ProtW32/Sohanad.J
KasperskyTrojan.Win32.Midgare.ahcz
microsoftTrojan:Win32/Ircbrute.A
normanSohanad.BRU
pandaW32/Autoit.HH
SophosMal/Generic-A
SymantecW32.Stiraut
Trend MicroWORM_SOHANAD.FM
vba32~Trojan.Autoit.ITN
V-BusterWorm.Autoit.XS

Avert® Labs has observed the following system activities:

ActivityRisk Level
Enumerates open windows
Medium
Program often suspends itself
Medium
Uses shared memory of other processes
Low
Writes executable in the windows folder
Low
Creates registry keys and data values to persist on OS reboot
Informational

Other detections that have been observed.

FileNameMcAfee Supported
%WINDIR%\system.exeW32/YahLover.worm!a
%WINDIR%\winlogon64.exe
Generic.dx!evl
%WINDIR%\msngr.exeGeneric.dx!ob

This sample can be identified by the following symptoms.

System Changes

These are general defaults for typical path variables. (Although they may differ, these examples are common.):
%WinDir% = \WINDOWS (Windows 9x/ME/XP/Vista), \WINNT (Windows NT/2000)
%SystemDir% = \WINDOWS\SYSTEM (Windows 98/ME), \WINDOWS\SYSTEM32 (Windows XP/Vista), \WINNT\SYSTEM32 (Windows NT/2000)
%ProgramFiles% = \Program Files

The following files were analyzed:

  • %USERPROFILE%\local settings\temp\!itw#143.exe

    • The following files have been added to the system:

  • %WINDIR%\msngr.exe
  • %WINDIR%\sliame.dll
  • %WINDIR%\stnemmoc.ocx
  • %WINDIR%\system.exe
  • %WINDIR%\winlogon64.exe

    • The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\currentversion\run\
    • twain = c:\windows\twain.exe
    • windows explorer = c:\windows\system.exe

    • The applications created the following network connection(s):

  • ***********:6667 (irc)
    • NICK Jimmy
    • NICK Jimmy USER alshea 0 0 Administrator
  • http
    • hxxp://guardians.niceboard.net/************
    • hxxp://guardians.niceboard.net/*************

    •    
    AVERT recommends to always use latest DATs and engine. This threat will be cleaned if you have this combination.

    Additional Windows ME/XP removal considerations