Analysis by: Sabrina Lei Sioting
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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 arrives as a component bundled with malware/grayware packages. It may be hosted on a website and run when a user accesses the said website.

  TECHNICAL DETAILS

File Size: 23,311 bytes
File Type: Script
Memory Resident: No
Initial Samples Received Date: 16 Jan 2012
Payload: Launches DoS/DDoS attacks

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.

It arrives as a component bundled with malware/grayware packages.

It may be hosted on a website and run when a user accesses the said website.

NOTES:
It launches a DDoS attack against a target IP address by sending several garbage data using the UDP protocol. It connects to port 53 of the site http://{BLOCKED}.proxyfire.net/fastenv to determine the said target IP address.

It requires additional components in order to execute all of its intended routine.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.710.07
FIRST VSAPI PATTERN DATE: 16 Jan 2012

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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as DDOS_ATTACK.TG. 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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