TR/Onlinegames.B.21 - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Onlinegames.B.21
Date discovered:	20/05/2008
Type:	Trojan
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Low to medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	102.211 Bytes
MD5 checksum:	8fe92a5dd3aea1a03c0d15b755ba1e7f
IVDF version:	7.00.04.63 - Tue, 20 May 2008 08:38 (GMT+1)

General Aliases:
   • Mcafee: PWS
   • Sophos: Mal/EncPk-CE
   • Panda: W32/Lineage.HXI
   • Eset: Win32/PSW.OnLineGames.NLI
   • Bitdefender: Trojan.Generic.1779980

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops malicious files
   • Registry modification

Files It copies itself to the following location:
• %SYSDIR%\amvo.exe

The following files are created:

– C:\Temp\dsr8q.dll
– %SYSDIR%\amvo0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.NSPM.Gen

Registry One of the following values is added in order to run the process after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "amva"="%SYSDIR%\amvo.exe"

The following registry keys are added:

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\
   LEGACY_ZXSDERFBUKJFYSHLHDFRSTDZHD]
   • "NextInstance"=dword:0x00000001

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\
   LEGACY_ZXSDERFBUKJFYSHLHDFRSTDZHD\0000]
   • "Class"="LegacyDriver"
   • "ClassGUID"="{8ECC055D-047F-11D1-A537-0000F8753ED1}"
   • "ConfigFlags"=dword:0x00000000
   • "DeviceDesc"="zxsderfbukjfyshlhdfrstdzhd"
   • "Legacy"=dword:0x00000001
   • "Service"="zxsderfbukjfyshlhdfrstdzhd"

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\
   LEGACY_ZXSDERFBUKJFYSHLHDFRSTDZHD\0000\Control]
   • "*NewlyCreated*"=dword:0x00000000
   • "ActiveService"="zxsderfbukjfyshlhdfrstdzhd"

File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

See a brief description here.

Description inserted by Petre Galan on Fri, 13 Nov 2009 16:03 (GMT+1)
Description updated by Petre Galan on Fri, 13 Nov 2009 16:20 (GMT+1)

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