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RANSOM_EIGHTZLOCK.A

August 23, 2017
 Analysis by: Wilbert Vidal
 ALIASES:

Trojan.Ransom.ScreenLocker (ALYac); Trojan.MSIL.LockScreen (Ikarus)

 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:

Downloaded from the Internet, Dropped by other malware

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:

279,552 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

04 Jul 2017

Payload:

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.

Process Termination

This Ransomware terminates the following processes if found running in the affected system's memory:

  • taskmgr

Other Details

This Ransomware is capable of locking the screen of the affected system.

It locks the screen and displays the following image:

NOTES:
The password required is 'Kate8Zlord', which should then be followed by pressing Alt + S to unlock the screen.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.512.08

FIRST VSAPI PATTERN DATE:

04 Jul 2017

VSAPI OPR PATTERN File:

13.513.00

VSAPI OPR PATTERN Date:

05 Jul 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

Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_EIGHTZLOCK.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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