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0xfff, also known as alh1mik, is a threat actor associated with development of the macOS malware notnullOSX. The actor has been linked to a ClickFix-style social-engineering campaign targeting macOS users who hold high-value cryptocurrency wallets. Observed lures relied on persuading victims to copy and execute commands in Terminal, leading to download and installation of notnullOSX and attempts to obtain broad disk access on the compromised device. notnullOSX has been observed deploying multiple modules, including ReplaceApp, which substitutes legitimate cryptocurrency wallet applications with counterfeit versions in order to capture wallet seed phrases in real time. The activity indicates a financially motivated operator focused on cryptocurrency theft through social engineering, malware deployment, credential-like secret theft, and data exfiltration from Apple macOS systems.
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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.
30 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.
16 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.