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Coinminer.Win32.RANSIM.A

July 01, 2019
 Analysis by: Jay Bradley Nebre
 ALIASES:

N/A

 PLATFORM:

Windows

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

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This Coinminer arrives as a component bundled with malware/grayware packages.

  TECHNICAL DETAILS

File Size:

1,160,192 bytes

File Type:

Other

Memory Resident:

No

Initial Samples Received Date:

27 Jun 2019

Arrival Details

This Coinminer arrives as a component bundled with malware/grayware packages.

Installation

This Coinminer drops the following files:

  • %AppDataLocal%\RnSimulator\TestFolder\Tests\7\190701112221_mnr.exe
  • %AppDataLocal%\RnSimulator\TestFolder\Tests\7\datarst.csv
  • %AppDataLocal%\RnSimulator\TestFolder\Tests\7\msvcp140.dll
  • %AppDataLocal%\RnSimulator\TestFolder\Tests\7\vcruntime140.dll

(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.200.06

FIRST VSAPI PATTERN DATE:

27 Jun 2019

VSAPI OPR PATTERN File:

15.201.00

VSAPI OPR PATTERN Date:

28 Jun 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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product to delete files detected as Coinminer.Win32.RANSIM.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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