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MegaCortex is a ransomware operation active by at least 2019 that has been associated with large-scale intrusions against corporate networks. It is linked to financially motivated cybercrime and has been identified as one of several ransomware groups that used QakBot/Qbot access to reach victim environments. Reported activity shows MegaCortex participating in enterprise compromises in which operators gained access to networks, deployed ransomware, and inhibited recovery by deleting Volume Shadow Copies. Law enforcement reporting has tied MegaCortex to broader criminal activity affecting more than 250 companies in the United States and hundreds of additional organizations worldwide during the 2019–2020 period, alongside related operations including LockerGoga and later Nefilim. Ukrainian national Volodymyr Viktorovich Tymoshchuk has been charged as an administrator connected to the LockerGoga, MegaCortex, and Nefilim ransomware schemes. MegaCortex is best characterized as a financially motivated ransomware actor focused on post-compromise enterprise disruption and monetization through file encryption.
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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.
7 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
MegaCortex is a ransomware operation managed by individuals such as Tymoshchuk, targeting organizations for financial gain.
MegaCortex is associated with ransomware attacks that breached hundreds of companies worldwide, resulting in millions of dollars in damages.
MegaCortex is a ransomware strain associated with actors linked to Nefilim, used in corporate extortion campaigns.
MegaCortex is a ransomware group that targeted large organizations worldwide, encrypting data and demanding ransom for decryption. The group was involved in high-profile attacks and used customized ransomware payloads for each victim.
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.