Analysis by: Arianne Grace Dela Cruz
 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

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.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 103,010 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 07 Nov 2019
Payload: Connects to URLs/IPs

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.

Backdoor Routine

This Backdoor connects to the following URL(s) to send and receive commands from a remote malicious user:

  • dns-info.{BLOCKED}s.pro

Information Theft

This Backdoor gathers the following data:

  • Volume Information
  • Computer Name
  • UserName
  • System's Locale
  • OS version
  • Proxy Details available on IE in the affected system

Other Details

This Backdoor does the following:

  • It loads the following file in order to proceed with its intended routine:
    • %System%\wbem\loadperf.dat
  • Once it is connected to "dns-info-{BLOCKED}s.pro", it will execute the arbitrary code provided by the URL.
  • It requires its main component to register this malware as a service.

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 15.478.02
FIRST VSAPI PATTERN DATE: 06 Nov 2019
VSAPI OPR PATTERN File: 15.479.02
VSAPI OPR PATTERN Date: 07 Nov 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as BKDR64_LAVAGOKLDR.ZCGK-B. 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:


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