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Virus:TR/Scar.dhcr
Date discovered:16/02/2011
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:121.026 Bytes
MD5 checksum:a111960c03d8e33339a13be23ff07d9d
VDF version:7.10.08.215
IVDF version:7.11.03.121 - Wednesday, February 16, 2011

 General Aliases:
   •  Kaspersky: Trojan.Win32.Scar.dhcr
   •  Bitdefender: Trojan.Agent.ARGJ
   •  GData: Trojan.Agent.ARGJ
   •  DrWeb: Trojan.DownLoader1.8357


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


Side effects:
   • Drops malicious files
   • Lowers security settings
   • Registry modification

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



It deletes the initially executed copy of itself.

 Registry The following registry keys are added in order to load the service after reboot:

– [HKLM\SYSTEM\CurrentControlSet\Services\grft]
   • "Description"="gtrr"
   • "DisplayName"="grrt"
   • "ErrorControl"=dword:0x00000000
   • "ImagePath"="%SYSDIR%\jelzam.exe"
   • "ObjectName"="LocalSystem"
   • "Start"=dword:0x00000002
   • "Type"=dword:0x00000010

 Backdoor Contact server:
The following:
   • yzcc.332**********.org:8080 (TCP)


 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 a runtime packer.

Description inserted by Petre Galan on Monday, July 11, 2011
Description updated by Petre Galan on Monday, July 11, 2011

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