TR/Dldr.Peregar.CG - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Dldr.Peregar.CG
Date discovered:	22/04/2008
Type:	Trojan
Subtype:	Downloader
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	260.608 Bytes
MD5 checksum:	ea22a5005e7a62fdb0ae21ac4d150309
VDF version:	7.00.03.198 - Thu, 24 Apr 2008 13:42 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Kaspersky: Trojan-Downloader:W32/Peregar.CG
   • F-Secure: Trojan-Downloader:W32/Peregar.CG
   • Eset: Win32/Adware.IeDefender.NDH application
   • Bitdefender: Trojan.BHO.OAS

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

Side effects:
   • Drops malicious files
   • Registry modification

Right after execution the following information is displayed:

Files The following files are created:

– A file that is for temporary use and it might be deleted afterwards:
• %WINDIR%\%random character string%

– %WINDIR%\%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/Dldr.Peregar.CG.1

Registry It registers a browser helper object (BHO) by adding the following key:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
Browser Helper Objects\{95E1D855-9232-48F7-80D9-1ADB65B7939C}]
• (Default)=""

File details Programming language:
The malware program was written in Delphi.

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 Alexandru Dinu on Mon, 09 Jun 2008 12:32 (GMT+1)
Description updated by Alexandru Dinu on Thu, 19 Jun 2008 10:45 (GMT+1)

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