Analysis by: Sabrina Lei Sioting
ALIASES:

Trojan-Dropper.Win32.Dapato, Trojan-Dropper.Win32.Dapato (Ikarus),

 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 may be dropped by other malware.

It executes the files it drops, prompting the affected system to exhibit the malicious routines they contain.

  TECHNICAL DETAILS

File Size: 29,535 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 10 Sep 2012

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_BSCOPE.KO

Installation

This Trojan drops the following files:

  • %User Temp%\peNemo.dat - same detection

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\upgrade.js - detected as JS_TROJWMI.A

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

It executes the files it drops, prompting the affected system to exhibit the malicious routines they contain.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.384.03
FIRST VSAPI PATTERN DATE: 10 Sep 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

Remove the malware/grayware file that dropped/downloaded TROJ_DAPATO.DH

    • TROJ_BSCOPE.KO

Step 3

Remove malware files dropped/downloaded by TROJ_DAPATO.DH

    • JS_TROJWMI.A

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_DAPATO.DH. 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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