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RANSOM_MANCROS.A

June 01, 2017
 Analysis by: Ryan Paolo Maglaque
 ALIASES:

MSIL/LockScreen.TI trojan(Eset-NOD32);MSIL/LockScreen.TI!tr(Fortinet)

 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:

1,218,048 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

25 May 2017

Payload:

Displays graphics/image

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.

Other Details

This Ransomware does the following:

  • Displays the following window (acts as a fake lockscreen) as its ransom note:

NOTES:

This ransomware does not encrypt files.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.428.08

FIRST VSAPI PATTERN DATE:

25 May 2017

VSAPI OPR PATTERN File:

13.429.00

VSAPI OPR PATTERN Date:

26 May 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

Scan your computer with your Trend Micro product to delete files detected as RANSOM_MANCROS.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.


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