C0015 first observed
The campaign source marks this as the beginning of the known activity window.
C0015 was a ransomware intrusion during which the unidentified attackers used Bazar, Cobalt Strike, and Conti, along with other tools, over a 5 day period. Security researchers assessed the actors likely used the widely-circulated Conti ransomware playbook based on the observed pattern of activity and operator errors.
Each relationship retains its own confidence and source.
Every date says what it measures so catalog dates are not confused with publication dates.
The campaign source marks this as the beginning of the known activity window.
CVEs, techniques, malware, and indicators in the sections below are associated with an attributed actor. They are useful investigative context, but the campaign source does not necessarily link every item directly to this campaign.
Use this material to guide hunting and prioritization, then confirm each relationship against its cited source.
No linked CVEs are available.
No linked techniques are available.
No linked malware or tools are available.
No source-linked indicators are available.
Open the original material before making an attribution or response decision.