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misere is a threat actor alias associated with multiple 2026 breach and data-leak claims affecting French organizations. Reported victims linked to this alias include Bureau Vallée, Litige.fr, Pachatours, Autosur, and the French government messaging platform Tchap. The actor has also been associated with collaborators or co-posters using the aliases ChimeraZ and NightBroker. Activity attributed to misere centers on unauthorized access to internet-facing systems, theft of databases, and public sale or leakage of allegedly stolen data on underground forums. Claimed intrusion methods include exploitation of injection flaws and unauthenticated access-control weaknesses, with assertions of command execution, persistent access, and account hijacking in some incidents. Reported post-compromise behavior includes collection and exfiltration of customer, identity, legal-case, travel, and vehicle-related data, as well as publication of samples and monetization of larger datasets through forum sales or gated leaks. The targeting pattern observed for this alias is concentrated in France and spans retail, legal services, travel, automotive services, and government communications. Several incidents suggest interest in personally identifiable information and account data that could support fraud, impersonation, follow-on phishing, or broader criminal exploitation. Although misere claimed responsibility for the Tchap breach, attribution, sophistication, and motive in that case remain uncertain. Most publicly reported incidents tied to misere remain unverified in full, and there is no high-confidence evidence establishing the actor as a state-sponsored operator. Based on the observed behavior, misere is best characterized as a data-theft-focused intrusion and leak actor operating against French targets, with demonstrated or claimed capabilities in initial access, persistence, exfiltration, and post-compromise abuse of exposed data.
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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.
15 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Selling allegedly stolen Bureau Vallée customer data and claiming compromise of a third-party supplier environment via injection flaws, command execution, persistent access, and retrieval of daily customer exports from an exposed FTP host.
Selling allegedly stolen Bureau Vallée customer data and claiming compromise of a third-party supplier environment via injection flaws, command execution, and persistent access.
Claimed breach and data leak operation targeting Litige.fr, allegedly exploiting unauthenticated access-control flaws and describing account takeover plus staff-dashboard access.
Claimed a full database breach of French tour operator Pachatours and said the data was extracted via an unauthenticated web endpoint vulnerable to SQL injection.
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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.