Ransom.Linux.REDNIEV.YXCGH

 Analysis by: Nathaniel Gregory Ragasa

 ALIASES:

ELF:RedAlert-A [Ransom](AVAST)

 PLATFORM:

Linux

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • 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.

It encrypts files with specific file extensions. It drops files as ransom note.

  TECHNICAL DETAILS

File Size:

373,325 bytes

File Type:

ELF

Memory Resident:

No

Payload:

Displays graphics/image, 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 accepts the following parameters:

  • -p Path (Encrypts files in a directory)
  • -f File (Encrypts a file)
  • -r Recursive (Used with -p)
  • -t Show encryption time
  • -n Search without file encryption (File info)
  • -x Debug Tests (Asymmetric cryptography performance tests)
  • -h List of command options
  • -w Stops running VMs by calling an esxcli command:
    • esxcli –formatter=csv –format-param=fields==”WorldID,DisplayName” vm process list | tail -n +2 | awk -F $’,’ ‘{system(“esxcli vm process kill –type=force –world-id=” $1)}’

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .log
  • .vmdk
  • .vmem
  • .vmsn
  • .vswp

It drops the following file(s) as ransom note:

  • {Infected Directory}/HOW_TO_RESTORE

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.696.03

FIRST VSAPI PATTERN DATE:

19 Jul 2022

VSAPI OPR PATTERN File:

17.697.00

VSAPI OPR PATTERN Date:

20 Jul 2022

Scan your computer with your Trend Micro product to delete files detected as Ransom.Linux.REDNIEV.YXCGH. 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:


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