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RANSOM_MARKOLOCK.A

July 11, 2017
 Analysis by: Michael Jay Villanueva
 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet


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.

  TECHNICAL DETAILS

File Size:

96,256 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

23 Jun 2017

Payload:

Displays graphics/image, Locks screen

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.

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
My appication = {Malware Path and Filename}

Other Details

This Ransomware does the following:

  • Displays the following fake lockscreen:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.488.06

FIRST VSAPI PATTERN DATE:

23 Jun 2017

VSAPI OPR PATTERN File:

13.489.00

VSAPI OPR PATTERN Date:

24 Jun 2017

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 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

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • My appication = {Malware Path and Filename}

Step 4

Scan your computer with your Trend Micro product to delete files detected as RANSOM_MARKOLOCK.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 this Knowledge Base page for more information.

NOTES:

This ransomware's fake lockscreen can be closed by following these steps:

  1. Press CTRL+ALT+DEL.
  2. Select Task Manager.
  3. Just press CTRL+Tab in order to navigate on the Processes Tab in Task Manager.
  4. Press the Arrow Keys on keyboard. (Note: Do not use mouse clicks), then locate the malware process.
  5. After locating the process, press the DEL key on keyboard, then select "End process" by pressing Enter Key.


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