TR/Agent.PK.40 - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Agent.PK.40
Date discovered:	20/10/2006
Type:	Trojan
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Low to medium
Static file:	Yes
File size:	157.184 Bytes
MD5 checksum:	45efb0ba59e951c998af6202eebfb385
VDF version:	6.36.00.109 - Mon, 16 Oct 2006 07:56 (GMT+1)
IVDF version:	6.36.00.125 - Wed, 18 Oct 2006 11:53 (GMT+1)

General Method of propagation:
   • No own spreading routine

Alias:
   • Kaspersky: Trojan.Win32.Agent.pk

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

Side effects:
   • Blocks access to security websites
   • Registry modification
   • Third party control

Registry The value of the following registry key is removed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "DCOM Server"=-

The following registry keys are added:

– [HKLM\SOFTWARE\Classes\CLSID\{2C1CD3D7-86AC-4068-93BC-A02304BB2236}\
   InProcServer32]
   • @="%malware execution directory%\%executed file%"
   • "ThreadingModel"="Apartment"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
   SharedTaskScheduler]
   • "{2C1CD3D7-86AC-4068-93BC-A02304BB2236}"="DCOM Server 2236"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\
   ShellServiceObjectDelayLoad]
   • "DCOM Server 2236"="{2C1CD3D7-86AC-4068-93BC-A02304BB2236}"

Hosts The host file is modified as explained:

– In this case already existing entries remain unmodified.

– Access to the following domains is effectively blocked:
   • www.trendmicro.com; rads.mcafee.com; customer.symantec.com;
      liveupdate.symantec.com; us.mcafee.com; updates.symantec.com;
      www.nai.com; secure.nai.com; dispatch.mcafee.com; download.mcafee.com;
      www.my-etrust.com; mast.mcafee.com; ca.com; www.ca.com;
      networkassociates.com; www.networkassociates.com; avp.com;
      www.kaspersky.com; www.avp.com; downloads4.kaspersky-labs.com;
      downloads3.kaspersky-labs.com; downloads2.kaspersky-labs.com;
      downloads1.kaspersky-labs.com; www.f-secure.com; viruslist.com;
      www.viruslist.com; liveupdate.symantecliveupdate.com; www.mcafee.com;
      sophos.com; www.sophos.com; securityresponse.symantec.com;
      www.symantec.com

The modified host file will look like this:

Backdoor Contact server:
The following:
   • 208.66.195.**********:2236

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

Miscellaneous Checks for an internet connection by contacting the following web sites:
   • aol.com
   • verizon.net
   • ameritech.net
   • cox.net
   • rr.com
   • adelphia.net
   • comcast.net
   • optonline.net

Mutex:
It creates the following Mutexes:
   • hs5p_av_mutex
   • hs5pdllv42236

File details Programming language:
The malware program was written in MS Visual C++.

Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
• UPX

See a brief description here.

Description inserted by Monica Ghitun on Mon, 23 Oct 2006 09:29 (GMT+1)
Description updated by Andrei Ivanes on Thu, 09 Nov 2006 11:27 (GMT+1)

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