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TROJ_DROPPER.AWT

August 25, 2014
 Modified by: Jaime Benigno Reyes
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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 does not have any propagation routine.

It does not have any backdoor routine.

It does not have any downloading capability.

It does not have any information-stealing capability.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

593,920 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 May 2014

Payload:

Drops files

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.

Installation

This Trojan drops and executes the following files:

  • %User Profile%\Music\Qvodupd.exe - detected as TROJ_DAPATO.YVX and with hidden attribute (Windows 7 and Vista)
  • %User Profile%\My Documents\My Music\Qvodupd.exe - detected as TROJ_DAPATO.YVX and with hidden attribute (Windows XP and 2003)

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It drops the following non-malicious file:

  • {malware path}\The Invitation of {BLOCKED}ps 2014 Conference.pdf - it will then be executed

Autostart Technique

This Trojan creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Qvodupd = ""%User Profile%\Music\Qvodupd.exe"" (Windows 7 and Vista)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Qvodupd = ""%User Profile%\My Documents\My Music\Qvodupd.exe"" (Windows XP and 2003)

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan does not have any downloading capability.

Information Theft

This Trojan does not have any information-stealing capability.

Other Details

This Trojan deletes itself after execution.

NOTES:

It does not have rootkit capabilities.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.826.06

FIRST VSAPI PATTERN DATE:

30 May 2014

VSAPI OPR PATTERN File:

10.827.00

VSAPI OPR PATTERN Date:

30 May 2014

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Remove malware/grayware files dropped/downloaded by TROJ_DROPPER.AWT. (Note: Please skip this step if the threats listed below have already been removed.)

     
    • TROJ_DAPATO.YVX

Step 4

Search and delete this file

[ Learn More ]
There may be some files 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.
  • {malware path}\The Invitation of {BLOCKED}ps 2014 Conference.pdf

Step 5

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Qvodupd = ""%User Profile%\My Documents\My Music\Qvodupd.exe"" (Windows XP and 2003)
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Qvodupd = ""%User Profile%\Music\Qvodupd.exe"" (Windows 7 and Vista)

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPER.AWT. 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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