Home/Threat Actor/Cicada3301
Threat Actor

Cicada3301

cicada3301 · unknown_likely_russia_aligned_alphv_lineage · active since 2024-06

Cicada3301 (Truesec canonical code-lineage analysis, June 2024 emergence) is a financially-motivated cybercriminal ransomware operation derived from ALPHV / BlackCat (alphv_blackcat.yaml) code lineage, emerged temporally adjacent to March 2024 ALPHV exit scam following the Change Healthcare incident ($22M USD initial ransom payment followed by ALPHV operational exit without paying attributed affiliate "Notchy")

industry technical analysis (Truesec, Morphisec, Cisco Talos, SentinelOne) documented substantial code overlap with ALPHV encryptor including shared Rust- based encryption architecture, shared command-line argument handling, shared file-targeting logic, and shared multi- threaded parallelization patterns.

operational-relationship between Cicada3301 operators and former ALPHV operators analytically open (former ALPHV core operators continuing under rebrand vs. affiliates with retained code access vs. source-code-acquisition vs. closely-affiliated successor entity)

cross-platform Rust-based encryptor deployment (Windows, Linux, VMware ESXi hypervisor targeting) operationally distinguishing from commodity Phobos and C++/C-based ransomware ecosystem.

standard double-extortion operational model with rclone-mediated Mega.nz exfiltration and leak-site data publication.

positions Cicada3301 within documented ransomware code-genealogy succession patterns (Conti - Black Basta / Royal / BlackSuit.

INC Ransom - Lynx Ransomware.

LockBit Black builder - DragonForce / Brain Cipher)

self-styled Cicada3301 naming references the 2012-2014 internet puzzle phenomenon (operationally rhetorical, no substantive linkage to original puzzle creators).

unknown_likely_russia_aligned_alphv_lineage confidence: high 10 aliases MITRE ATT&CK G0045 ↗

Profile

Cicada3301 (Truesec canonical code-lineage analysis, June 2024 emergence) is a financially-motivated cybercriminal ransomware operation that emerged in approximately June 2024 with operational tooling derived from the ALPHV / BlackCat (alphv_blackcat.yaml) ransomware family code lineage. The operational emergence followed temporally adjacent operational dissolution of ALPHV / BlackCat in March 2024, when ALPHV operators conducted an apparent exit scam following receipt of approximately $22 million USD initial ransom payment from Change Healthcare (a US healthcare data clearinghouse processing approximately 50% of US medical claims), exiting operations without paying the attributed affiliate operator the affiliate share of the payment. The cluster's operational distinctiveness is concentrated in two dimensions: (1) ALPHV / BLACKCAT CODE LINEAGE OPERATIONAL POSITIONING.

Industry technical analysis (Truesec, Morphisec, Cisco Talos, SentinelOne) documented substantial code overlap between Cicada3301 ransomware binaries and ALPHV / BlackCat encryptor code, including shared Rust-based encryption implementation architecture, shared command-line argument handling patterns, shared file-targeting logic, shared parallelization patterns for multi-threaded encryption performance, and shared operational-tradecraft patterns. The Rust-programming-language base of both encryptors is operationally significant for code-lineage analysis, Rust- based ransomware development is operationally distinctive in the ransomware ecosystem and requires specialized development expertise that is not commodity-available. The code-lineage assessment positions Cicada3301 within the documented ransomware code-genealogy evolution pattern similar to the Conti collapse followed by Black Basta / Royal / BlackSuit successors (all separately curated in this corpus), the INC Ransom source-code lineage followed by Lynx Ransomware (curated at lynx_ransomware.yaml), and the LockBit Black builder leak followed by DragonForce and Brain Cipher derivatives (both separately curated).

The exact operational-relationship between Cicada3301 operators and former ALPHV operators remains analytically open, possible scenarios include former ALPHV core operators continuing operations under a rebranded cluster, former ALPHV affiliates operating with retained code access, source-code-acquisition by distinct operators, or operational continuity by a closely-affiliated cybercriminal entity. (2) CROSS-PLATFORM RUST-BASED ENCRYPTOR DEPLOYMENT. Cicada3301 operators have developed and deployed Rust-based ransomware encryptor variants for Windows, Linux, and VMware ESXi hypervisor targeting, operationally consistent with the predecessor ALPHV / BlackCat cross-platform deployment capability.

The Rust-based cross-platform deployment operationally distinguishes Cicada3301 from commodity Phobos-ecosystem-operator clusters (8base) and from C++ / C-based ransomware development clusters that comprise the majority of the ransomware ecosystem. Operational tradecraft includes initial access via compromised credentials, selective N-day vulnerability exploitation, conventional lateral movement (RDP, SMB), data exfiltration via rclone to Mega.nz cloud storage, Rust-based ALPHV- derived ransomware encryption, and double-extortion pressure via leak-site data publication. The cluster operates a RaaS affiliate framework with affiliate-recruitment activity on Russian-language cybercriminal forums.

Cicada3301 is curated alongside the broader ransomware ecosystem coverage in this corpus, note that ALPHV / BlackCat (alphv_blackcat.yaml) is curated separately as the operational predecessor cluster. Cicada3301's operational distinctiveness within this ecosystem is the documented ALPHV / BlackCat code-lineage successor positioning, the Rust-based cross-platform encryptor capability, and the analytically-open question of operational-relationship to former ALPHV operators in the context of the Change Healthcare exit-scam aftermath. The cluster's self-styled "Cicada3301" naming references the Cicada 3301 internet puzzle phenomenon (a series of internet- based cryptographic puzzles published 2012-2014 by unknown organizers), operationally rhetorical positioning by the ransomware operators rather than substantive linkage to the original Cicada 3301 puzzle creators (the original puzzle creators have publicly disavowed any connection to the ransomware operation in subsequent reporting).

Aliases

10
cicada3301cicada 3301cicada3301 ransomwarecicada 3301 ransomwarecicada3301 operatorsalphv_blackcat_code_lineage_successoralphv_successor_ransomwareblackcat_rust_lineage_successorcicadacicada3301 raas

MITRE ATT&CK aliases

8
Additional names MITRE lists for G0045.
menuPassPOTASSIUMStone PandaAPT10Red ApolloCVNXHOGFISHBRONZE RIVERSIDE

Notable Campaigns

4
2024-2025Cross-Platform Rust-Based Ransomware Encryptor Deployment (Windows, Linux, ESXi)
2024Cicada3301 Operational Emergence (June 2024)
2024ALPHV / BlackCat Rust Code Lineage Technical Analysis (2024)
2024Change Healthcare ALPHV Exit Scam Context, Predecessor Cluster Operational History

Attribution & Reporting

Attributed by
TruesecMorphisecCisco TalosSentinelOneBleepingComputerSOCRadarRecorded FutureSophosHalcyonTrend MicroCISA (US Cybersecurity and Infrastructure Security Agency)FBI (Federal Bureau of Investigation)
Key reporting
reportTruesec: Cicada3301 Ransomware, ALPHV/BlackCat Successor Analysis (2024), canonical code-lineage analysis
reportMorphisec: Cicada3301 Ransomware Technical Analysis
reportCisco Talos: Cicada3301 Emerging Ransomware Analysis
reportSentinelOne: Cicada3301 Rust-Based Ransomware ALPHV Lineage Assessment
reportBleepingComputer: Cicada3301 Coverage and ALPHV Lineage Discussion
reportSOCRadar: Cicada3301 Dark Web Profile
reportHalcyon: Cicada3301 Threat Intelligence Profile
reportSophos X-Ops: Cicada3301 Ransomware Operational Analysis
reportMalpedia Actor / Malware Profile: Cicada3301

Operational

State sponsor

Cybercriminal ransomware operation that emerged in approximately June 2024 with operational tooling derived from the ALPHV / BlackCat (alphv_blackcat.yaml) ransomware family code lineage, ALPHV / BlackCat operated as a significant Russian-aligned ransomware operation from late 2021 through March 2024, when the operators conducted an apparent exit scam following the high-profile Change Healthcare incident (approximately $22 million USD initial ransom payment by Change Healthcare to ALPHV operators followed by ALPHV's operational exit without paying the attributed affiliate operator). Following the March 2024 ALPHV exit scam, multiple ransomware operations have emerged with operational tooling, code, or operational- tradecraft elements suggesting ALPHV code-lineage genealogy. Cicada3301 emerged in approximately June 2024 with a Rust- programming-language-based ransomware encryptor sharing substantial code similarities with ALPHV / BlackCat (which was also Rust-based, Rust-based ransomware development is operationally distinctive in the ransomware ecosystem and operationally significant for code-lineage analysis).

Industry analysis (Truesec, Morphisec, Cisco Talos, BleepingComputer) assessed Cicada3301 as a probable ALPHV / BlackCat code- lineage successor based on shared Rust-based encryption architecture, shared command-line argument handling, shared file-targeting logic, and shared operational-tradecraft patterns. The exact operational-relationship between Cicada3301 operators and former ALPHV operators remains analytically open, possible scenarios include former ALPHV core operators continuing operations under a rebranded cluster, former ALPHV affiliates operating with retained code access, source-code-acquisition by distinct operators, or operational continuity by a closely-affiliated cybercriminal entity. The cluster operates as a financially- motivated cybercriminal operation with no known state sponsorship beyond the broader Russian-aligned cybercriminal ecosystem operational context.

The cluster's self-styled naming references the Cicada 3301 internet puzzle phenomenon (a series of internet-based cryptographic puzzles published 2012-2014), operationally rhetorical positioning rather than substantive linkage to the original Cicada 3301 puzzle creators.

Motivations
financial_gain, ransomware_extortion, double_extortion_data_exfiltration_and_encryption, cross_platform_ransomware_deployment, alphv_blackcat_market_succession, ransom_payment_extraction
Sectors
Regions

Detection Blind Spots

60 techniques
Across this actor’s 60 mapped techniques, the share covered by each detection layer. Low bars are where you’d be blind if this actor targeted you.
Behavioral / log (Sigma)56/60 · 93%
Analytics (MITRE CAR)37/60 · 61%
Runtime / container (Falco)9/60 · 15%
File / malware (YARA)1/60 · 1%
Network (Suricata/Snort)18/60 · 30%
Vuln scan (Nuclei)0/60 · 0%

Atomic Test Plan

30 techniques
Runnable Atomic Red Team tests covering this actor’s mapped techniques - validate your detections against this specific adversary. Cross-reference the blind spots above. For authorized lab / purple-team use. Open the full builder

Tools Used

1 mapped

CVEs Exploited

2
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin