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Ransom.Win32.MRJOWS.A

June 07, 2019
 Analysis by: John Donnie Celestre
 ALIASES:

Gen:Heur.Ransom.REntS.Gen.1 (BITDEFENDER)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

It drops files as ransom note.

  TECHNICAL DETAILS

File Size:

376,832 bytes

File Type:

EXE

Initial Samples Received Date:

21 May 2019

Arrival Details

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

Installation

This Ransomware adds the following processes:

  • cmd.exe /c net stop "IBM Domino Diagnostics(CProgramFilesIBMDomino)"
  • cmd.exe /c net stop "IBM Domino Server(CProgramFilesIBMDominodata)"
  • cmd.exe /c net stop "Simply Accounting Database Connection Manager"
  • cmd.exe /c net stop firebirdguardiandefaultinstance
  • cmd.exe /c net stop ibmiasrw
  • cmd.exe /c net stop IISADMIN
  • cmd.exe /c net stop mr2kserv
  • cmd.exe /c net stop MSExchangeADTopology
  • cmd.exe /c net stop MSExchangeFBA
  • cmd.exe /c net stop MSExchangeIS
  • cmd.exe /c net stop MSExchangeSA
  • cmd.exe /c net stop MSSQL$ISARS
  • cmd.exe /c net stop MSSQL$MSFW
  • cmd.exe /c net stop MSSQLServerADHelper100
  • cmd.exe /c net stop QBCFMonitorService
  • cmd.exe /c net stop QBPOSDBServiceV12
  • cmd.exe /c net stop QBVSS
  • cmd.exe /c net stop QuickBooksDB1
  • cmd.exe /c net stop QuickBooksDB10
  • cmd.exe /c net stop QuickBooksDB11
  • cmd.exe /c net stop QuickBooksDB12
  • cmd.exe /c net stop QuickBooksDB13
  • cmd.exe /c net stop QuickBooksDB14
  • cmd.exe /c net stop QuickBooksDB2
  • cmd.exe /c net stop QuickBooksDB3
  • cmd.exe /c net stop QuickBooksDB4
  • cmd.exe /c net stop QuickBooksDB5
  • cmd.exe /c net stop QuickBooksDB6
  • cmd.exe /c net stop QuickBooksDB7
  • cmd.exe /c net stop QuickBooksDB8
  • cmd.exe /c net stop QuickBooksDB9
  • cmd.exe /c net stop ReportServer$ISARS
  • cmd.exe /c net stop ShadowProtectSvc
  • cmd.exe /c net stop SPAdminV4
  • cmd.exe /c net stop SPSearch4
  • cmd.exe /c net stop SPTimerV4
  • cmd.exe /c net stop SPTraceV4
  • cmd.exe /c net stop SPUserCodeV4
  • cmd.exe /c net stop SPWriterV4
  • cmd.exe /c net stop SQLAgent$ISARS
  • cmd.exe /c net stop SQLAgent$MSFW
  • cmd.exe /c net stop SQLBrowser
  • cmd.exe /c net stop SQLWriter
  • cmd.exe /c net stop WinDefend

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

  • HI SIRI, DEMONSLAY AND AMIIIIGO!!! HOW ARE YOU?

Ransomware Routine

This Ransomware appends the following extension to the file name of the encrypted files:

  • [ID-{ID}][OFFTITAN@PM.ME].JSWORM

It drops the following file(s) as ransom note:

  • JSWORM-DECRYPT.txt

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.158.03

FIRST VSAPI PATTERN DATE:

07 Jun 2019

VSAPI OPR PATTERN File:

15.159.00

VSAPI OPR PATTERN Date:

08 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

Identify and terminate files detected as Ransom.Win32.MRJOWS.A

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.MRJOWS.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:

Step 5

Restore encrypted files from backup.


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