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Sicari is a ransomware operation associated with the aliases Sicarii and Sicarius. It is described as a crypto-ransomware family that encrypts victim data using a combination of AES and RSA and then demands payment in Bitcoin. Reported targeting is oriented toward English-speaking users, with victim files including common business and personal data such as office documents, PDFs, databases, images, archives, and multimedia files. Observed delivery and access vectors attributed to Sicari include exposed or insecure RDP services, phishing emails with malicious attachments, exploit-based delivery, deceptive downloads, fake software updates, malvertising, botnet-assisted distribution, web injects, and trojanized or repacked installers. These behaviors support assessment of capabilities spanning initial access, credentialed remote-service abuse, and post-compromise encryption for extortion. Public reporting available here indicates low observed prevalence in late 2025. High-confidence information supports classifying Sicari as a financially motivated ransomware threat actor or operator set. No reliable attribution to a specific country of origin is established from the available facts.
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7 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
1 malware family attributed to this actor across reporting.
9 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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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.
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Domains, IPs, and hashes tied to this actor, refreshed continuously.