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Brain Cipher, also styled BrainCipher and brain_cipher, is a financially motivated ransomware and extortion operation targeting government and private-sector organizations worldwide. It attacked Indonesia's temporary National Data Center on June 20, encrypting government servers and disrupting services across more than 200 government agencies, including immigration, passport control, and permit issuance. The operation demanded $8 million for decryption and a promise not to disclose allegedly stolen data. Its dedicated leak-site activity also includes healthcare organizations. Brain Cipher uses ransomware created with the leaked LockBit 3.0 builder, incorporating modifications that encrypt file names as well as file contents. Its operations involve breaching corporate networks, moving laterally, obtaining Windows domain administrator credentials, and deploying ransomware across compromised systems. It steals corporate data before encryption and threatens public disclosure to pressure victims into paying, combining encryption with data-leak threats in a double-extortion model. The operation communicates with victims through a Tor-based negotiation portal that uses unique victim identifiers and a chat interface. It subsequently established a dedicated data leak site to support extortion. Observed ransom demands range from $20,000 to $8 million. Its geographic origin is not established, and use of the leaked LockBit builder does not establish an organizational relationship with LockBit.
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Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
13 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
2 malware families attributed to this actor across reporting.
22 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Allegedly conducted a ransomware attack against latitudesubro.com, a Brazilian manufacturing-sector organization.
Reportedly conducted a ransomware attack against maxwell-group.com, an organization based in the United Kingdom.
Allegedly conducted a ransomware attack against wildmanbg.com, an organization in Bulgaria.
Allegedly conducted a ransomware attack against mulholland.com, a US-based organization.
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Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.