Loading threat actor…
Atomic Stealer is an infostealer operation associated with credential and identity theft. It has been observed as one of the most prevalent infostealer threats in 2025, indicating broad operational scale and sustained deployment. The malware is used to harvest credentials and other authentication material from compromised systems, supporting downstream criminal activity such as account compromise and the resale of access through initial access broker ecosystems. Infostealer activity in this cluster is associated with identity-focused intrusion patterns, including theft of credentials and session material used to bypass multifactor authentication protections. Atomic Stealer is also referred to as atomic_stealer and atomic_stealer_operators.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
2 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.