ALIASES:

Worm:Win32/Koobface.gen!D, Worm:Win32/Koobface.gen!D (Microsoft); W32/Koobface.worm.gen.m (McAfee); Trojan Horse (Symantec); Trojan.Win32.Assist.bld (Kaspersky); Worm.Win32.Koobface (v) (Sunbelt); Trojan.Packed.Hiloti.Gen.2 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • 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 deletes itself after execution.

  TECHNICAL DETAILS

Tipo de compactação: 41,472 bytes
Tipo de arquivo: EXE
Residente na memória: No
Data de recebimento das amostras iniciais: 17 May 2012

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.

Other System Modifications

This worm deletes the following files:

  • %Windows%\DXXDV3~1.BAT

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

Dropping Routine

This worm drops the following files:

  • sd.dat
  • %Windows%\ld15.exe
  • %Windows%\dxxdv34567.bat

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

Other Details

This worm deletes itself after execution.

This report is generated via an automated analysis system.

  SOLUTION

Mecanismo de varredura mínima: 9.200

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

Search and delete these components

[ Learn More ]
There may be some components 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.
  • sd.dat
  • %Windows%\ld15.exe
  • %Windows%\dxxdv34567.bat

Step 3

Scan your computer with your Trend Micro product to delete files detected as WORM_PKOOBF.SM. 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.

Step 4

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %Windows%\DXXDV3~1.BAT


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