GhostSec and Stormous Expand Ransomware Operations With GhostLocker 2.0

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Summary

Cisco Talos details GhostSec and Stormous’s joint ransomware operations, GhostLocker 2.0’s behavior, and two tools linked to attacks on websites: a site-scanning utility and a WordPress hacking tool.

Key points

  • GhostSec and Stormous jointly conducted double-extortion attacks across multiple countries and business sectors, according to group disclosures assessed by Talos.
  • The groups launched the STMX_GhostLocker ransomware-as-a-service program, offering affiliates paid, free and data-publication options.
  • GhostLocker 2.0 is a Golang variant that persists in the Windows Startup folder, communicates with a C2 server, and can terminate configured processes or scheduled tasks.
  • In the sample analyzed, it uploaded targeted Office documents before encrypting them with the .ghost extension; it skips the C:\Windows folder.
  • Talos identified a C2 server at 94[.]103[.]91[.]246 and reported that the ransomware sends infection data and files to it.
  • GhostSec’s tools include a Python utility for scanning websites and GhostPresser, a shell script targeting WordPress that can bypass logins and change site settings.

Article Details

Attack Vectors
  • GhostLocker 2.0 copies itself to the Windows Startup folder for persistence, registers infections with its C2 server, uploads targeted files to the C2 server, and encrypts them.
  • GhostSec and Stormous conducted joint double-extortion ransomware attacks, threatening to disclose stolen data.
  • GhostSec likely used GhostPresser with cross-site scripting to compromise websites; the tool can bypass WordPress logins and modify site settings and users.
Defensive Notes
  • The article recommends Cisco Secure Endpoint, Cisco Secure Web Appliance, Cisco Secure Email, Cisco Secure Firewall, Cisco Secure Malware Analytics, Umbrella, Cisco Duo, Snort Subscriber Rule Set, and ClamAV protections.
  • Snort SIDs identified for this threat are 62983-62989 and 300818-300820.
  • ClamAV detection identified: Win.Ransomware.GhostSec-10020906-0.

Indicators of compromise

TypeIndicatorContext
IPV494[.]103[.]91[.]246GhostLocker 2.0 C2 server IP address identified by Talos.

MITRE ATT&CK

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