BKDR_FAKEMS.USNT

December 10, 2018
 Analysis by: Maureen Reyes
 ALIASES:

Trojan-Downloader.Win32.Agent.xxykoj (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

50,176 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

15 Sep 2018

Arrival Details

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Autostart Technique

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

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurentVersion\Run
Adobe Monitor = rundll32.exe {Malware Path and Filename}, start

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.640.03

FIRST VSAPI PATTERN DATE:

21 Nov 2018

VSAPI OPR PATTERN File:

14.641.0

VSAPI OPR PATTERN Date:

22 Nov 2018

Step 1

Scan your computer with your Trend Micro product to delete files detected as BKDR_FAKEMS.USNT. 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 the following Trend Micro Support pages for more information:

Step 2

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\Software\Microsoft\Windows\CurrentVersion\Run
    • Adobe Monitor = "rundll32.exe {Malware Path and Filename}, start"

Step 3

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

Step 4

Restart in Safe Mode

[ Learn More ]


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