HackTool.MSIL.Povlsomware.A

 Analysis by: Maria Emreen Viray

 PLATFORM:

Windows

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


This Hacking Tool 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:

22,016 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

09 Feb 2021

Payload:

Drops files

Arrival Details

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

Other Details

This Hacking Tool does the following:

  • retrieves key used by Povlsomware in file encryption by:
    • obtaining the file path of ransomware binary by reading the following key set as its autostart technique:
       HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
       Povlsomware = {File path of binary}
    • displays the key in console and copies it to clipboard
  • accepts file/s as arguments and uses retrieved key to either encrypt (E) or decrypt (D) specified files:
    • if E is chosen:
      • encrypts a copy of the file and drops it to current directory
      • renames the file into the following:
        • {original filename}_povlsom_crypt.{original file extension}
    • if D is chosen:
      • decrypts a copy of the encrypted file and drops it to current directory
      • renames the file into the following:
        • {original filename}_povlsom_decrypt.{original file extension}

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

2.376.52

FIRST VSAPI PATTERN DATE:

09 Feb 2021

VSAPI OPR PATTERN File:

2.377.00

VSAPI OPR PATTERN Date:

10 Feb 2021

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 HackTool.MSIL.Povlsomware.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 the following Trend Micro Support pages for more information:


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