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Ransom.Linux.LILOCKED.THIAOAIA

September 12, 2019
 Analysis by: John Anthony Banes
 PLATFORM:

Linux (64-bit)

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

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:

79,040 bytes

File Type:

ELF

Memory Resident:

No

Initial Samples Received Date:

10 Sep 2019

Payload:

Displays message/message boxes, Encrypts files

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:

  • It is a decryptor tool for files encrypted by LILOCKED ransomware.
    It requires a key (-k) to be used and file/s to be decrypted, together with any of the following arguments:
    • -a → option to decrypt all files
    • -v → verbose
    • -f → decrypt specified file
    • -i → decrypts encrypted lilocked file, but does not restore original extension
    • -k → key to be used in decrypting encrypted file, must consist of Hex values with length equal to 64 characters.
  • Upon execution, it displays the following commands available which allows the user to decrypt files:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.358.05

FIRST VSAPI PATTERN DATE:

10 Sep 2019

VSAPI OPR PATTERN File:

15.359.00

VSAPI OPR PATTERN Date:

11 Sep 2019

Step 1

Scan your computer with your Trend Micro product to delete files detected as Ransom.Linux.LILOCKED.THIAOAIA. 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 the following Trend Micro Support pages for more information:

Step 2

Restore encrypted files from backup.


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