Threat Encyclopedia

INF_BLACKEN.A

Publish date: October 14, 2014

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:

Downloaded from the Internet


This malware is downloaded by the zero-day exploit leveraging the vulnerability covered under CVE-2014-4114, also known as "Sandworm."

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan may be downloaded from remote sites by other malware.

It is used to load and execute a file.

TECHNICAL DETAILS

File Size:

446 bytes

File Type:

INF

Initial Samples Received Date:

14 Oct 2014

Payload:

Executes files

Arrival Details

This Trojan may be downloaded from remote site(s) by the following malware:

Other System Modifications

This Trojan modifies the following file(s):

  • renames slide1.gif to slide1.gif.exe - detected as BKDR_BLACKEN.A

It adds the following registry entries as part of its installation routine:

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

Other Details

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

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

SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.210.05

FIRST VSAPI PATTERN DATE:

14 Oct 2014

VSAPI OPR PATTERN File:

11.211.00

VSAPI OPR PATTERN Date:

15 Oct 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

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

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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"

Step 5

Search and delete this file

[ Learn More ]
There may be some 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.
  • {malware path}\slide1.gif.exe

Step 6

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