Analysis by: Anthony Joe Melgarejo
ALIASES:

TrojanDownloader:Win32/Karagany.I (Microsoft), Downloader.Parshell (Symantec), PWS-Zbot.gen.afr (McAfee), Mal/Zbot-JZ (Sophos), Trojan-Downloader.Win32.Karagany (Ikarus)

 PLATFORM:

Windows 2000, Windows XP (32-bit and 64-bit), Windows Server 2003, Windows Vista (32-bit and 64-bit), Windows 7 (32-bit and 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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: 28,680 bytes
File Type: EXE
File Compression: Unknown
Memory Resident: No
Initial Samples Received Date: 08 Jan 2013
Payload: Downloads files

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 files:

  • %User Temp%\~!#{random value}.tmp

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}lgraphics.de/d.htm
  • http://{BLOCKED}ontagne.com/p.htm
  • http://{BLOCKED}iedeals.net/w.htm
  • http://{BLOCKED}dfocus.net/j.htm
  • http://{BLOCKED}n.com/h.htm
  • http://{BLOCKED}p-cosmetics-wholesale.com/r.htm
  • http://{BLOCKED}pagnonsecopur.fr/a.htm
  • http://{BLOCKED}l-arabians.com/u.htm
  • http://{BLOCKED}nillostur.com/h.htm
  • http://{BLOCKED}cialadvisorsalliance.com/a.htm

  SOLUTION

Minimum Scan Engine: 9.300

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product and note files detected as TROJ_KARAGANY.GL

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete this file

[ Learn More ]

There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.  
  • %User Temp%\~!#{random value}.tmp

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_KARAGANY.GL. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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