TROJ64_WHAIM.A

December 25, 2014
 ALIASES:

Trojan/Win64.Destroyer (AhnLab),Trojan.Destfallen (Symantec)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

41,472 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

11 Dec 2014

Arrival Details

This Trojan may be dropped by the following malware:

Installation

This Trojan drops the following copies of itself into the affected system:

  • %System%\{random file name}.dll
    where {random file name} can be any of the following:
    • bddsvc.dll
    • iconsvc.dll
    • ehressvc.dll
    • netstsvc.dll
    • pnas.dll
    • pnrpmchname.dll
    • pwpsvc.dll
    • pcssvc.dll
    • rregconf.dll
    • scardmngsvc.dll
    • tcpmsvc.dll
    • tschmng.dll
    • mmthread.dll
    • wcmngsvc.dll
    • coladj.dll
    • wndmodmng.dll
    • timesyncsvc.dll
    • wiredconfsvc.dll
    • wlanconf.dll
    • wstmng.dll

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Autostart Technique

This Trojan registers its dropped component as a system service to ensure its automatic execution at every system startup. It does this by creating the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{service name}
ImagePath = "%SystemRoot%\System32\svchost.exe -k {random service name}"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{service name}
DisplayName = "{display name}"
where {display name} can be any of the following:

  • BitLocker Drive Decryption Service
  • Internet Connection Service
  • Media Center Service
  • Network Storage Service
  • Peer Networking Address
  • PNRP Machine Name
  • Power Policy
  • Program Compatibility Service
  • Remote Registry Configuration
  • Smart Card Management Service
  • Tablet PC Management Service
  • Task Schedule Manager
  • Thread Ordering Service
  • WebClient Manage Service
  • Windows Color Adjustment
  • Windows Modules Management
  • Windows Time Synchronization
  • Wired Config Service
  • WLAN Config Service
  • Workstation management

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{service name}
Description = "{service description}"
where {service description} can be any of the following:

  • BDESVC hosts the BitLocker Drive Decryption service.
  • Provides network address translation, addressing, name resolution and/or intrusion prevention services for a home or small office network.
  • Allows Media Center to locate and connect to the computer.
  • This service delivers network notifications (e.
  • Enables multi-party communication using Peer-to-Peer Connecting.
  • This service publishes a machine name using the Peer Name Resolution Protocol.
  • Manages power policy and power policy notification delivery.
  • This service provides support for the Program Compatibility Assistant (PCA).
  • Enables remote users to modify registry configurations on this computer.
  • Manages access to smart cards read by this computer.
  • Enables Tablet PC pen and ink functionality
  • Enables a user to configure and schedule automated tasks on this computer.
  • Provides ordered execution for a group of threads within a specific period of time.
  • Enables Windows-based programs to create, access, and modify Internet-based files.
  • The WcasPlugInService service hosts third-party Windows Color System color device model and gamut map model plug-in modules.
  • Enables installation, modification, and removal of Windows updates and optional components.
  • Maintains date and time synchronization on all clients and servers in the network.
  • The Wired AutoConfig (DOT3SVC) service is responsible for performing IEEE 802.1X
  • Creates and maintains client network connections to remote server using the SMB protocol

NOTES:

Where {service name} can be any of the following:

  • blockcom
  • iconcom
  • mcsvccom
  • nssvccom
  • pnacom
  • pnrpcom
  • ppolcom
  • pcompcom
  • rregcom
  • scardcom
  • tpcmcom
  • tschcom
  • mmthcom
  • wcmngcom
  • wndcolcom
  • wndmodcom
  • wndtimecom
  • wconfcom
  • wlanconfcom
  • wstcom

It overwrites the Master Boot record (MBR) of the affected system.

This is dropped by TROJ_WHAIM.A if the system is 64 bit and Operating System (OS) is Vista or above

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.338.07

FIRST VSAPI PATTERN DATE:

11 Dec 2014

VSAPI OPR PATTERN File:

11.339.00

VSAPI OPR PATTERN Date:

12 Dec 2014

Step 1

Restore your system's Master Boot Record (MBR)

To restore your system's Master Boot Record (MBR):

• On Windows 2000, XP, and Server 2003:

  1. Insert your Windows Installation CD into your CD drive then restart your computer.
  2. When prompted, press any key to boot from the CD.
  3. On the Main Menu, type r to enter the Recovery Console.
    (Note for Windows 2000: After pressing r, type c to choose the Recovery Console on the repair options screen.)
  4. Type the number that corresponds to the drive and folder that contains Windows (usually C:\WINDOWS) and press Enter.
  5. Type your Administrator password and press Enter.
  6. In the input box, type the following then press Enter:
    fixmbr {affected drive}
  7. Type exit and press Enter to restart the system normally.

• On Windows Vista, 7, and Server 2008:

  1. Insert your Windows Installation DVD into the DVD drive, then press the restart button on your computer.
  2. When prompted, press any key to boot from the DVD.
  3. Depending on your Windows Installation DVD, you might be required to choose the installation language. On the Install Windows window, choose your language, locale, and keyboard layout or input method. Click Repair your computer.
  4. Select Use recovery tools that can help fix problems starting Windows. Select your installation of Windows. Click Next.
  5. If the Startup Repair window appears, click Cancel, Yes, then Finish.
  6. In the System Recovery Options menu, click Command Prompt.
  7. In the Command Prompt window, type the following then press Enter:
    BootRec.exe /fixmbr
  8. Type exit and press Enter to close the Command Prompt window.
  9. Click Restart to restart your computer normally.

• On Windows 8, 8.1, and Server 2012:

  1. Insert your Windows Installation DVD in the DVD drive, then restart your computer.
  2. When prompted, press any key to boot from the DVD.
  3. Depending on your Windows Installation DVD, you might be required to select the keyboard layout. Then on the Windows Setup window, choose your language, locale, and input method. Click Next, then click Repair your computer.
  4. Click Troubleshoot>Advanced Options>Command Prompt.
  5. In the Command Prompt window, type the following then press Enter:
    BootRec.exe /fixmbr
  6. Type exit and press Enter to close the Command Prompt window.
  7. Click Continue to restart the system normally.

Step 2

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 3

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 4

Remove the malware/grayware file that dropped/downloaded TROJ64_WHAIM.A . (Note: Please skip this step if the threat(s) listed below have already been removed.)

     
    • TROJ_WHAIM.A

Step 5

Restart in Safe Mode

[ Learn More ]

Step 6

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\SYSTEM\CurrentControlSet\Services
    • {service name}

Step 7

Scan your computer with your Trend Micro product to delete files detected as TROJ64_WHAIM.A . 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.

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ64_WHAIM.A . 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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