Analysis by: Janus Agcaoili
ALIASES:

Trojan-Ransom.Win32.Locky.bom (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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

It does not have any propagation routine.

It does not have any backdoor routine.

It requires its main component to successfully perform its intended routine. This is the Trend Micro detection for files that exhibit certain behaviors.

  TECHNICAL DETAILS

File Size: Varies
Memory Resident: No
Initial Samples Received Date: 01 Sep 2016

Arrival Details

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

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Other Details

This Trojan requires its main component to successfully perform its intended routine.

This is the Trend Micro detection for:

  • An encrypted「Ransom_LOCKY」
  • Requires to be decrypted in order to function properly
  • Functions as 「Ransom_LOCKY」 after it is decrypted

NOTES:

It does not have rootkit capabilities.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.750.05
FIRST VSAPI PATTERN DATE: 01 Sep 2016
VSAPI OPR PATTERN File: 12.751.00
VSAPI OPR PATTERN Date: 02 Sep 2016

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_LOCKY.ENC. 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.


Did this description help? Tell us how we did.