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TROJ_DROPPR.ADG

September 07, 2013
 ALIASES:

Found Win32/DH{ADUBICIj} (AVG)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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.

  TECHNICAL DETAILS

File Size:

544,256 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

30 May 2013

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.

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\ChaosingAid

It adds the following registry entries:

HKEY_CURRENT_USER\Control Panel\Desktop
LowLevelHooksTimeout = "271"

HKEY_LOCAL_MACHINE\SOFTWARE\ChaosingAid
CheckSum = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\ChaosingAid
Version = "7b7"

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\ChaosOne.exe
  • %User Temp%\DDDD_Proc.exe
  • %Start Menu%\Programs\Warcraft III\????.lnk
  • %System%\golfset.ini
  • %User Temp%\E1F2F.tmp

(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://www.{BLOCKED}me.tv/public/chaosone/ca_notice.txt
  • http://{BLOCKED}me.tv/public/chaosone/banner.chaosone2.jpg
  • http://{BLOCKED}me.tv/public/chaosone/ca_ver.txt
  • http://www.{BLOCKED}me.tv/public/chaosone/ca_map.txt
  • http://www.{BLOCKED}me.tv/public/chaosone/count.php

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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

Delete this registry key

[ 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_LOCAL_MACHINE\SOFTWARE
    • ChaosingAid

Step 3

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\Control Panel\Desktop
    • LowLevelHooksTimeout = "271"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ChaosingAid
    • CheckSum = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\ChaosingAid
    • Version = "7b7"

Step 4

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.
  • %User Temp%\ChaosOne.exe
  • %User Temp%\DDDD_Proc.exe
  • %Start Menu%\Programs\Warcraft III\????.lnk
  • %System%\golfset.ini
  • %User Temp%\E1F2F.tmp

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPR.ADG. 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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