TR/Agent.baf.1 - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Agent.baf.1
Date discovered:	12/07/2006
Type:	Trojan
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Medium
Static file:	Yes
File size:	79.360 Bytes
MD5 checksum:	cd66ab672f46da1a09c0e7516b53f191
VDF version:	6.35.00.154 - Wed, 12 Jul 2006 14:09 (GMT+1)
IVDF version:	6.35.00.193 - Thu, 20 Jul 2006 11:25 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Mcafee: CoreFlood.dr
   • Kaspersky: Backdoor.Win32.Afcore.cr
   • TrendMicro: BKDR_AFCORE.AD
   • F-Secure: Backdoor.Win32.Afcore.cr
   • Eset: Win32/Afcore

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

Side effects:
   • Drops a malicious file
   • Registry modification
   • Steals information
   • Third party control

Files The following files are created:

– %TEMPDIR%\%random character string%.dll Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.baf.3

– %SYSDIR%\%random character string%.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.baf.3

– %SYSDIR%\%random character string%.dat
– %SYSDIR%\%random character string%.dat
– %SYSDIR%\%random character string%.dat
– %SYSDIR%\%random character string%.dat
– %SYSDIR%\%random character string%.dat

Registry The following registry keys including all values and subkeys are removed:
   • HKLM\Software\Classes\CLSID\{750fdf0e-2a26-11d1-a3ea-080036587f03}\InprocServer32
   • HKLM\Software\Classes\CLSID\{750fdf0e-2a26-11d1-a3ea-080036587f03}
   • HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers\Offline Files

The following registry keys are added:

– HKLM\SOFTWARE\Classes\CLSID\{%generated CLSID%}
   • "(default)"="%random character string%"

– HKLM\SOFTWARE\Classes\CLSID\{%generated CLSID%}\
   InprocServer32
   • "(default)"="%SYSDIR%\%random character string%.dll"
   • "ThreadingModel"="Apartment"

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
   ShellIconOverlayIdentifiers\iepeets
   • "(default)"="{%generated CLSID%}"

Backdoor Contact server:
The following:
   • http://joy4host.com**********

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

Sends information about:
    • Current malware status
    • Malware uptime
    • Information about the Windows operating system

Miscellaneous Mutex:
It creates the following Mutexes:
• %system-dependent%
• %system-dependent%

See a brief description here.

Description inserted by Teodor Onisor on Tue, 05 Sep 2006 16:14 (GMT+1)
Description updated by Teodor Onisor on Wed, 13 Sep 2006 10:58 (GMT+1)

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