Threat actor
UNC4393
Last fetched
UNC4393 is a threat actor tracked in WhisperGraph's MITRE ATT&CK corpus, observed using 0 techniques and also known as 4 other names.
Also known as
Storm-1811, CURLY SPIDER, STAC5777, Cardinal
Description
UNC4393 is a financially motivated threat actor primarily using BASTA ransomware. They have been active since early 2022 and have targeted over 40 organizations across various industries. UNC4393 has shown a willingness to cooperate with other threat clusters for initial access and has evolved from using existing tools to developing custom malware. They focus on efficient data exfiltration and multi-faceted extortion, often utilizing tools like COGSCAN and RCLONE for reconnaissance and data theft.
Techniques by tactic
No ATT&CK techniques are recorded for UNC4393 in WhisperGraph.
Attributed infrastructure
None published. WhisperGraph carries no ATTRIBUTED_TO edge to UNC4393 today — this states the absence of a published link, not that UNC4393 has no infrastructure.
References
- https://cloud.google.com/blog/topics/threat-intelligence/unc4393-goes-gently-into-silentnight
- https://www.security.com/threat-intelligence/black-basta-ransomware-zero-day
- https://cloud.google.com/blog/topics/threat-intelligence/detecting-disrupting-malvertising-backdoors/
- https://www.microsoft.com/en-us/security/blog/2024/05/15/threat-actors-misusing-quick-assist-in-social-engineering-attacks-leading-to-ransomware/
- https://news.sophos.com/en-us/2025/01/21/sophos-mdr-tracks-two-ransomware-campaigns-using-email-bombing-microsoft-teams-vishing/
- https://www.esentire.com/security-advisories/ongoing-email-bombing-campaigns-leading-to-remote-access-and-post-exploitation
- https://redcanary.com/blog/threat-intelligence/storm-1811-black-basta/
- https://redcanary.com/blog/threat-intelligence/intelligence-insights-june-2024/
- https://x.com/MsftSecIntel/status/1881751635598139714
- https://techcommunity.microsoft.com/blog/microsoftsecurityexperts/phish-click-breach-hunting-for-a-sophisticated-cyber-attack/4267916
- https://services.google.com/fh/files/misc/m_trends_2023_report.pdf
- https://services.google.com/fh/files/misc/m-trends-2024.pdf
- https://x.com/Unit42_Intel/status/1880368272610050459
- https://medium.com/walmartglobaltech/qbot-is-back-connect-2d774052369f
- https://go.crowdstrike.com/rs/281-OBQ-266/images/CrowdStrikeGlobalThreatReport2025.pdf
- https://www.crowdstrike.com/adversaries/curly-spider/
© The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.
Related pages
Pivot from UNC4393 into its techniques, tactics and any attributed infrastructure.
Queries
Resolves the slug to this actor, merging every duplicate node sharing the same name.
MATCH (a:ACTOR)
WHERE a.name =~ $pattern OR any(x IN a.aliases WHERE x =~ $pattern)
RETURN a.id AS id, a.name AS name, a.aliases AS aliases, a.description AS description,
a.references AS references, a.campaigns AS campaigns
LIMIT 25Techniques this actor uses, grouped by the tactic each one serves.
MATCH (a:ACTOR {name: $name})-[:USES_TECHNIQUE]->(t:ATTACK_PATTERN)
OPTIONAL MATCH (t)-[:USES_TACTIC]->(tac:ATTACK_PATTERN)
RETURN t.id AS techniqueId, t.name AS techniqueName, tac.id AS tacticId, tac.name AS tacticName
LIMIT 1000Infrastructure publicly attributed to this actor.
MATCH (n)-[:ATTRIBUTED_TO]->(a:ACTOR {name: $name})
RETURN labels(n)[0] AS kind, n.name AS name
LIMIT 25Or query Whisper from your own LLM workflow via the Whisper MCP server.