Analysis by: Sabrina Lei Sioting
ALIASES:

TrojanDownloader:Win32/Swizzor.AK (Microsoft), Trojan.Win32.Swizzor.c (Kaspersky), Swizzor.gen.g (McAfee), Mal/Swizzor-K (Sophos), Trojan-Downloader:W32/Swizzor.gen!A (Fsecure), Trojan.Win32.Swizzor.c (Sunbelt), W32/Swizzor.E!Generic (Authentium), Trojan.Swizzor.Gen.7 (Bitdefender), W32/Swizzor.fam!tr (Fortinet), W32/Swizzor.E!Generic (Fprot), Trojan-Downloader.Win32.Swizzor (Ikarus), Win32/TrojanDownloader.Swizzor.NBF trojan (Nod32), Trj/Swizzor.S (Panda)

 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.

It opens a hidden Internet Explorer window.

  TECHNICAL DETAILS

File Size: 778,240 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 14 Sep 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.

Adware Routine

This Trojan connects to the following URLs to download and display ads:

  • ads.{BLOCKED}9-195.com

Other Details

This Trojan opens a hidden Internet Explorer window.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.428.01
FIRST VSAPI PATTERN DATE: 14 Sep 2011
VSAPI OPR PATTERN File: 8.429.00
VSAPI OPR PATTERN Date: 14 Sep 2011

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_DLOADER.LD. 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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