Analysis by: Michael Cabel
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

It executes then deletes itself afterward.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size: 54,784 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 08 Aug 2011

Arrival Details

This worm 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 worm executes then deletes itself afterward.

Download Routine

This worm connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}8.{BLOCKED}9.174.230/bau/{random characters}
  • http://{BLOCKED}2.{BLOCKED}2.67.200/api/urls/?affid=02321
  • http://{BLOCKED}2.{BLOCKED}2.67.200/api/stats/install/1004/02321
  • http://{BLOCKED}2.{BLOCKED}4.4.134/1041.exe?affid=02321
  • http://{BLOCKED}2.{BLOCKED}0.179.117/{random characters}
  • http://{BLOCKED}6.{BLOCKED}6.108.126/kad/{random characters}
  • http://{BLOCKED}3.{BLOCKED}0.133.87/kko/{random characters}
  • http://{BLOCKED}6.{BLOCKED}6.108.126/kad/{random characters}

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 8.342.05
FIRST VSAPI PATTERN DATE: 08 Aug 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 WORM_PALEVO.BEE. 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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