Analysis by: Sabrina Lei Sioting
ALIASES:

TrojanDownloader:Win32/Stration.A (Microsoft); Email-Worm.Win32.Warezov.eu (Kaspersky); W32.Stration.DE@mm (Symantec); W32/Strati-Gen (Sophos); Email-Worm.Win32.Warezov (Ikarus); Win32/Stration.LZ worm (Nod32)

 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: 13,828 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 22 Jul 2007

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 copies of itself into the affected system:

  • %System%\{random filename}.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}jinkderunha.com/chr/829/nt.exe

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 4.608.11
FIRST VSAPI PATTERN DATE: 22 Jul 2007
VSAPI OPR PATTERN File: 4.609.00
VSAPI OPR PATTERN Date: 22 Jul 2007

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product to delete files detected as TROJ_STRAT.EQ. 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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