Analysis by: MarfelTi
ALIASES:

Microsoft : TrojanDownloader:Win32/Karagany.A

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 47,616 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 15 Jun 2011

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following non-malicious files:

  • %User Profile%\Application Data\Adobe\plugs\mmc{random numbers}.txt
  • %User Profile%\Application Data\Adobe\plugs\mmc{random numbers 1}.exe
  • %User Profile%\Application Data\Adobe\plugs\mmc{random numbers 2}.exe
  • %User Profile%\Application Data\Adobe\shed\thr1.chm

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It creates the following folders:

  • %User Profile%\Application Data\Adobe\shed
  • %User Profile%\Application Data\Adobe\plugs

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}lets.ce.ms/showthread.php?t=772720