Analysis by: Ryan Paolo Maglaque
ALIASES:

MSIL/LockScreen.UD(Eset-NOD32);MSIL/LockScreen.UD!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

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: 594,432 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 16 Jun 2017

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 does the following:

  • Displays the following lockscreen window:

  • The url button opens the following links:
    • http://{BLOCKED}ik.com/40qm ← contains Code1
    • http://{BLOCKED}ik.com/40qv ← contains Code2

NOTES:

The links first open ads before proceeding to open the site containing the codes.

The codes to unlock the lockscreen are 0941-4234-6354-0235 (for Code1) and 4215-2511-7845-2135 (for Code2).

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.476.01
FIRST VSAPI PATTERN DATE: 16 Jun 2017
VSAPI OPR PATTERN File: 13.477.00
VSAPI OPR PATTERN Date: 17 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

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