Analysis by: Homer Pacag
ALIASES:

Trojan:Win32/Foosace.J!dha (Microsoft);

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This backdoor may be dropped by other malware.

It connects to a website to send and receive information.

It retrieves specific information from the affected system.

  TECHNICAL DETAILS

File Size: 35,328 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 09 Apr 2015

Arrival Details

This backdoor may be dropped by the following malware:

  • TROJ_SEDNIT.KL

Installation

This backdoor adds the following mutexes to ensure that only one of its copies runs at any one time:

  • E%pc} .-$]  lBH d2k  lBH d2k  lBH RE: ><]pf;Wk  lBH d2k  lBH d2k  lBH E%`e|-?yZh|yb#

Backdoor Routine

This backdoor connects to the following websites to send and receive information:

  • {BLOCKED}.{BLOCKED}.12.133

Information Theft

This backdoor retrieves the following information from the affected system:

  • OS Version
  • System Information
  • Running Processes

  SOLUTION

Minimum Scan Engine: 9.750
FIRST VSAPI PATTERN FILE: 11.594.05
FIRST VSAPI PATTERN DATE: 09 Apr 2015
VSAPI OPR PATTERN File: 11.595.00
VSAPI OPR PATTERN Date: 09 Apr 2015

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 dropped/downloaded by BKDR_SEDNIT.KL. (Note: Please skip this step if the threat(s) listed below have already been removed.)

    • TROJ_SEDNIT.KL

Step 3

Scan your computer with your Trend Micro product to delete files detected as BKDR_SEDNIT.KL. 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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