INF_BLACKEN.SM

December 03, 2014
 ALIASES:

Exploit-CVE2014-4114 (McAfee), Trojan.Inf.BlackEnergy.A (BitDefender), Backdoor.Win32.Fonten.k (Kaspersky)

 PLATFORM:

Windows

 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:

Dropped by other malware

This Trojan may be dropped by other malware.

It is used to load and execute a file.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

Other

Initial Samples Received Date:

14 Oct 2014

Payload:

Modifies files

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_MDLOAD.PGTY
  • TROJ_MDROP.JBR

This malware arrives via the following means:

  • It is dropped or downloaded upon leveraging any of the following vulnerabilities:
    • CVE-2014-4114
    • CVE-2014-6352

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\Microsoft\Windows\
CurrentVersion\RunOnce =
Install = "{malware path}\slide1.gif.exe"

HKEY_LOCAL_MACHINE\Microsoft\Windows\
CurrentVersion\RunOnce
Install = "{malware path}\slide.gif.exe"

Other System Modifications

This Trojan modifies the following file(s):

  • renames {malware path}\slide.gif to {malware path}\slide.gif.exe - detected as TROJ_TALERET.DRP
  • renames slide1.gif to slide1.gif.exe - detected as BKDR_BLACKEN.A

Other Details

This Trojan is used to load and execute the following file:

  • {malware path}\slide.gif.exe - detected as TROJ_TALERET.DRP
  • {malware path}\slide1.gif.exe - detected as BKDR_BLACKEN.A

  SOLUTION

Minimum Scan Engine:

9.700

VSAPI OPR PATTERN File:

11.273.00

VSAPI OPR PATTERN Date:

12 Nov 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 INF_BLACKEN.SM. (Note: Please skip this step if the threat(s) listed below have already been removed.)

    • TROJ_MDLOAD.PGTY
    • TROJ_MDROP.JBR

Step 4

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

    • TROJ_TALERET.DRP
    • BKDR_BLACKEN.A

Step 5

Restart in Safe Mode

[ Learn More ]

Step 6

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_LOCAL_MACHINE\Microsoft\Windows\CurrentVersion\RunOnce
    • Install = "{malware path}\slide1.gif.exe"
  • In HKEY_LOCAL_MACHINE\Microsoft\Windows\CurrentVersion\RunOnce
    • Install = "{malware path}\slide.gif.exe"

Step 7

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

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.

  • https://technet.microsoft.com/en-us/library/security/MS14-060
  • https://technet.microsoft.com/library/security/3010060


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