- Published
- Source
- BleepingComputer
- Filed under
- Data breaches, Ransomware, Attacks
The Clop ransomware gang has moved its data leak site to a new Tor address after confirming its previous server was compromised and defaced through an unpatched Grav CMS flaw that BleepingComputer has learned is an unauthenticated path traversal vulnerability.
What defenders check after a story like this
- Backups kept offline or immutable – and a restore you have actually tested.
- Multi-factor authentication on every remote way in, with VPNs and firewalls patched first.
- Alerts for the warning signs: new admin accounts, security tools switched off, mass file changes, large uploads.
More helpNCSC: mitigating malware and ransomware attacks (opens in a new tab)
Defender’s notebook
The attacker technique behind this story, in MITRE’s terms – and what to check in your own estate.
Exfiltration Over Web Service
ExfiltrationWhat a defender checks
- Watch for large uploads to cloud storage and file-sharing sites.
- Hunt for tools like rclone and unexpected archive files.
- Use DLP on your most sensitive data.
Build the skillBlue Team Specialist · Breach Analysis
Data Encrypted for Impact
ImpactWhat a defender checks
- Isolate affected hosts from the network to stop the spread.
- Confirm backups are offline and restorable – then test a restore.
- Hunt for what came first: new admin accounts, disabled security tools, remote-access software.
Build the skillBlue Team Engineer · Incident Management & Response Engineering
© 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation.
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