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Contagious Interview is a North Korea-linked threat activity cluster associated with the Lazarus ecosystem and widely tracked under aliases including Famous Chollima, WaterPlum, PurpleBravo, Nickel Tapestry, Storm-1877, UNC5267, Void Dokkaebi, Wagemole, Tenacious Pungsan, DeceptiveDevelopment, and DPRK IT worker activity. The cluster combines fake job and contractor recruitment, remote IT worker infiltration, software supply-chain compromise, and malware delivery to obtain long-term access, steal data and credentials, target cryptocurrency assets, and generate revenue for the DPRK. A defining tradecraft pattern is social engineering through bogus interviews, hiring platforms, recruiter outreach, and collaboration requests on professional and developer platforms. Victims are lured into downloading malware disguised as interview software, troubleshooting tools, or development projects. The actor has also operated remote-worker schemes in which operatives use forged or stolen identities to secure employment at foreign companies, then establish persistent remote access and gain trusted insider access to source code, internal communications, and deployment pipelines. Contagious Interview has repeatedly targeted software developers, cryptocurrency and blockchain organizations, financial institutions, FinTech companies, and related trading or marketing roles. Observed campaigns also expanded beyond developers into retail-linked and ecommerce-themed lures. The actor has shown particular interest in cryptocurrency wallets, browser-stored credentials, session material, and sensitive corporate data. Malware and tooling associated with the cluster include BeaverTail, InvisibleFerret, OtterCookie, Tsunami, OmniStealer, and DEV#POPPER-style JavaScript RATs. These toolsets support cross-platform operations against Windows, macOS, and Linux. Reported capabilities include host reconnaissance, credential theft from browsers, session and cookie theft, clipboard theft, keylogging, secret file theft, remote command execution, persistence through startup and autostart mechanisms, remote desktop enablement, defense evasion through environment and virtual-machine checks, and exfiltration of documents, images, wallet data, and other targeted files. Some campaigns also deployed cryptominers and botnet-oriented components. The actor has demonstrated notable adaptability in delivery and command-and-control methods. Beyond conventional web and repository-based staging, campaigns have used malicious npm packages, trojanized GitHub projects, ClickFix-style lures, compiled payloads for less technical victims, and blockchain-based payload retrieval and command-and-control techniques spanning multiple public chains. Reporting also indicates continued malware development, modularization, and operational experimentation across 2024-2026. Contagious Interview overlaps with broader DPRK revenue-generation operations rather than purely traditional espionage. Its activity supports illicit income generation through fraudulent employment, cryptocurrency theft, data theft, and related compromise of private-sector organizations worldwide.
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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.
Attributed origin per open-source reporting.
54 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
28 malware families attributed to this actor across reporting.
23 additional families tracked in Mallory.
1 CVE this actor has used in observed campaigns. 1 of them exploited in the wild.
394 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.
North Korean IT worker fraud operation in which suspected members posed as remote developers, gained access to corporate virtual machines, performed host reconnaissance, checked IP geolocation, used remote access tooling, and leveraged the employment scheme as a pathway to potential malware deployment, data theft, and extortion.
North Korean IT worker operatives infiltrate legitimate companies by using forged or stolen identities, passing hiring checks, gaining trusted internal access, and operating remotely for extended periods to access source code, internal communications, and deployment pipelines while generating revenue for the regime.
North Korean IT worker operatives infiltrate legitimate companies by posing as remote developers, using forged or stolen identities, gaining trusted internal access for months, and leveraging that access to obtain source code, internal communications, and deployment pipeline access while earning salaries that fund regime activities.
Conducting npm supply-chain attacks using hijacked and purpose-built packages whose loaders query an attacker-controlled Ethereum wallet to recover C2 infrastructure from blockchain transaction data, then fetch additional malware stages.
Match sector + geo + tech-stack targeting against your real footprint.
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.