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Ongoing Dire Wolf Ransomware Campaign
18 August 2025
There are reports of a newly emerged ransomware group, known as ‘Dire Wolf’. First identified in May 2025, the Dire Wolf group has launched targeted attacks against multiple sectors and regions.
Background
There are reports of a newly emerged ransomware group, known as ‘Dire Wolf’. First identified in May 2025, the Dire Wolf group has launched targeted attacks against multiple sectors and regions, with the ransomware group mainly targeting the manufacturing and technology sectors.
Impact
Dire Wolf ransomware group employs a double extortion tactic, where it encrypts data on victims’ systems and threatens to publicly release exfiltrated data on its data leak site (DLS) unless a ransom is paid. This causes a two-fold impact of data loss and reputational damage on victim organisations. Anti-forensics techniques have been observed in the Dire Wolf ransomware variant, which includes a multi-stage attack chain designed to verify successful encryption, evade detection and prevent data recovery.
Indicators of Compromise
Administrators are advised to monitor and block known Indicators of Compromise (IOCs) associated with the Dire Wolf ransomware variant.
Possible IOCs associated with the Dire Wolf ransomware are shown in the table below:
Indicators of Compromise
Type | File Name | Hash |
|---|---|---|
Win64 EXE | data345.exe | MD5: A71dbf2e20c04da134f8be86ca93a619 SHA-1: Ed7c9fbd42605c790660df86b7ec325490f6d827 SHA-256: 8fdee53152ec985ffeeeda3d7a85852eb5c9902d2d480449421b4939b1904aad |
Win64 EXE | data345.exe (unpacked) | MD5: aa62b3905be9b49551a07bc16eaad2ff SHA-1: 4a5852e9f9e20b243d8430b229e41b92949e4d69 SHA-256: 27d90611f005db3a25a4211cf8f69fb46097c6c374905d7207b30e87d296e1b3 |
Administrators are advised to monitor their systems and networks for the listed IOCs and review event and security logs for suspicious activity. They should also ensure that multiple backups are in place and tested, and apply appropriate security controls to detect and contain the Dire Wolf ransomware.
Additional Resources
Systems administrators may refer to CSA's advisory on how to protect their systems and data from ransomware threats here: https://isomer-user-content.by.gov.sg/36/01bb2d60-d6c3-4b29-9eec-845c43f2a2ff/singcert-advisory-protect-your-systems-and-data-from-ransomware-attacks.pdf
For organisations that are victims of a ransomware incident, please refer to CSA's ransomware response checklist here: https://isomer-user-content.by.gov.sg/36/5e2d519f-4261-4483-a4c6-1d36cffead8d/ransomware-response-checklist.pdf
References
https://www.broadcom.com/support/security-center/protection-bulletin/dire-wolf-ransomware