PLATFORM:

Windows

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE
Low
Medium
High
Critical

  • Threat Type:
    Backdoor

  • Destructiveness:
    No

  • Encrypted:
    No

  • In the wild:
    Yes

  OVERVIEW

INFECTION CHANNEL: Dropped by other malware

This backdoor may be dropped by other malware.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File size: 23,552 bytes
File type: EXE
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 04 декабря 2014
PAYLOAD: Drops files

Arrival Details

This backdoor may be dropped by the following malware:

  • BKDR_WIPALL.C

Installation

This backdoor drops the following component file(s):

  • %User Temp%\zawq.bat - component used to delete itself. This is deleted also afterwards.

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other System Modifications

This backdoor deletes the following files:

  • {malware path}\kph.sys

Other Details

This backdoor deletes the initially executed copy of itself

NOTES:

This backdoor queries for the value of McShield ImagePath in the following registry:

SYSTEM\CurrentControlSet\services\McShield
ImagePath = {mcshield path}

It moves the file mcshield.exe to %System% folder.

It starts the following service(s):

  • KProcessHacker2

It uses KProcessHacker2 to terminate AV-related related files:

  • UdaterUI.exe
  • McTray.exe
  • shstat.exe
  • FrameworkService.exe
  • VsTskMgr.exe
  • mfeann.exe
  • naPrdMgr.exe

  SOLUTION

Minimum scan engine: 9.700
First VSAPI Pattern File: 11.320.02
First VSAPI Pattern Release Date: 04 декабря 2014
VSAPI OPR PATTERN-VERSION: 11.321.00
VSAPI OPR PATTERN DATE: 04 декабря 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 the malware/grayware file that dropped/downloaded BKDR64_WIPALL.F. (Note: Please skip this step if the threat(s) listed below have already been removed.)

     
    • BKDR_WIPALL.C

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR64_WIPALL.F. 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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