ALIASES:

BackDoor-BAC (McAfee); Backdoor.Haxdoor (Symantec); PAK:ASPack (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Backdoor.Bot.5546 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This backdoor 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: 2,273,856 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 25 Nov 2011

Arrival Details

This backdoor 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 backdoor adds the following registry keys:

HKEY_CURRENT_USER\Software\Simply Super Software

HKEY_CURRENT_USER\Software\Simply Super Software\
Trojan Remover

HKEY_CURRENT_USER\Software\Simply Super Software\
Trojan Remover\Scan Preferences

HKEY_CURRENT_USER\Software\Simply Super Software\
Trojan Remover\TR7\Control\
Common

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Simply Super Software\
Trojan Remover\Scan Preferences
DPFEnabled = 1

HKEY_CURRENT_USER\Software\Simply Super Software\
Trojan Remover\Scan Preferences
RPEnabled = 1

HKEY_CURRENT_USER\Software\Simply Super Software\
Trojan Remover\TR7\Control\
Common
MainForm = "200,0,1,233,263,791,505"

Dropping Routine

This backdoor drops the following files:

  • %User Profile%\Trojan Remover Logfiles\TRDEBUG.LOG

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.200

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

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_CURRENT_USER\Software
    • Simply Super Software
  • In HKEY_CURRENT_USER\Software\Simply Super Software
    • Trojan Remover
  • In HKEY_CURRENT_USER\Software\Simply Super Software\Trojan Remover
    • Scan Preferences
  • In HKEY_CURRENT_USER\Software\Simply Super Software\Trojan Remover\TR7\Control
    • Common

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\Software\Simply Super Software\Trojan Remover\Scan Preferences
    • DPFEnabled=1
  • In HKEY_CURRENT_USER\Software\Simply Super Software\Trojan Remover\Scan Preferences
    • RPEnabled=1
  • In HKEY_CURRENT_USER\Software\Simply Super Software\Trojan Remover\TR7\Control\Common
    • MainForm="200,0,1,233,263,791,505"

Step 4

Search and delete this file

[ Learn More ]
There may be some component 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. %User Profile%\Trojan Remover Logfiles\TRDEBUG.LOG

Step 5

Scan your computer with your Trend Micro product to delete files detected as BKDR_HAXDOOR.LC. 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.


Did this description help? Tell us how we did.