TR/Lager.U.1 - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Lager.U.1
Date discovered:	14/02/2006
Type:	Trojan
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Low to medium
Static file:	Yes
File size:	48.164 Bytes
MD5 checksum:	044650cf2d2b490699df8259c22f50b8
VDF version:	6.33.00.225 - Tue, 14 Feb 2006 06:54 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Kaspersky: Trojan-Proxy.Win32.Lager.ah
   • TrendMicro: TROJ_GALAPOPER.T
   • VirusBuster: virus Trojan.PR.Lager.Y
   • Bitdefender: Trojan.Spy.Agent.CN

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Downloads a malicious file
   • Drops files
   • Registry modification

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

The following files are created:

– Non malicious file:
   • %SYSDIR%\zlbw.dll

– A file that is for temporary use and it might be deleted afterwards:
   • %SYSDIR%\log.txt

Registry The following registry key is added in order to run the process after reboot:

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

The following registry keys are added:

– [HKEY_CURRENT_USER]
   • "ColorTable19"=dword:%hex number%
   • "ColorTable20"=dword:%hex number%

Backdoor Contact server:
All of the following:
   • 216.255.179.234/new/cntr/**********
   • 69.50.171.172/**********
   • 69.50.161.106/**********
   • 216.255.179.235/new/cls/**********

As a result it may send information and remote control could be provided. This is done via the HTTP GET and POST method using a PHP script.

Sends information about:
    • Computer name
    • Current malware status

Remote control capabilities:
    • Download file

Miscellaneous Mutex:
It creates the following Mutex:
• _alanchum

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 Daniel Constantin on Fri, 17 Feb 2006 16:04 (GMT+1)
Description updated by Daniel Constantin on Mon, 20 Feb 2006 14:00 (GMT+1)

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