Playbook to respond and mitigate Abyss Ransomware

If under attack, quickly do the scoping and plan for containment. Download few authoritative Write-Up (See below references) for the ABYSS Ransomware Variant(s) Encountered. Harvest additional Indicators from the Report(s). Mobilize the team and remember to take as much help as possible. You can customise our baseline playbooks

• https://www.sygnia.co/blog/abyss-locker-ransomware-attack-analysis/ [4 February 2025]
• https://www.fortinet.com/blog/threat-research/ransomware-roundup-abyss-locker [February 26, 2024]
• https://www.trendmicro.com/vinfo/nz/threat-encyclopedia/malware/ransom.win64.abysslocker.ypedr
• https://www.redpacketsecurity.com/abyss-ransomware-victim-four-eye-clinics/
• https://www.sentinelone.com/anthology/abyss-locker/ & https://www.sentinelone.com/anthology/
• https://socradar.io/dark-web-profile-abyss-ransomware/
• https://www.seqrite.com/blog/unveiling-abyss-locker-the-rapid-rise-of-a-menacing-ransomware-threat/
• https://blackpointcyber.com/wp-content/uploads/2024/12/Abyss.pdf
• https://hivepro.com/wp-content/uploads/2024/02/Abyss-Lockers-Substantial-Threat-Explored_TA2024077.pdf
• https://cyberint.com/blog/research/into-the-depths-of-abyss-locker/
• https://securityonline.info/abyss-locker-ransomware-inside-the-stealthy-network-intrusions-and-destructive-attacks/ [February 9, 2025]
• Onion – https://github.com/joshhighet/ransomwatch/blob/main/docs/INDEX.md
• https://www.shadowstackre.com/analysis/abysslocker

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About This Threat Profile

• First Identified: 2023
• Operation style:
  • Unverified, likely a private operation.
• Extortion method:
  • Double extortion – combining the traditional ransomware extortion method (encryption) with exfiltration of victim’s sensitive data; the group threatens to leak the data via a data leak site if the ransom demand is not paid.
• Most frequently targeted industry:
  • Industrials (Manufacturing)
• Most frequently targeted victim HQ region: United States, North America
• Known Associations:
  • Babuk Ransomware
  • HelloKitty Ransomware
  • Infoleak222
• Affected platforms: Microsoft Windows, Linux
  Impacted parties: Microsoft Windows and Linux Users
  Impact: Steals and encrypts victims’ files and demands ransom for file decryption and not releasing the stolen data.
  Severity level: High

If you were impacted by this attack or are seeking guidance on how to prevent similar attacks, please contact us at contact@flexibleir.com or our 24-hour hotline +91-97314 14756.