OilCheck
MITRE ATT&CK: S1171 View on attack.mitre.org
Aliases: OilCheck
- First seen
- 2022-01-01 00:00:00
- Malware type
- downloader
- Family
- Malware family
- Operating systems
- windows
- Profile updated
- 2026-07-07 15:28:53
Targeted industries: government-and-public-sector
Targeted regions: country_code:il
Context
OilCheck is a C#/.NET downloader that has been used by OilRig since at least 2022 including against targets in Israel. OilCheck uses draft messages created in a shared email account for C2 communication.
Detection coverage
- 84 Sigma rules
Malware & tools used
- Exfiltration Over Web Service (attack-pattern)
- Ingress Tool Transfer (attack-pattern)
- Bidirectional Communication (attack-pattern)
Used by threat actors
- OilRig (threat-actor)
Reports & references
- ESET — Oilrig Persistent Attacks Cloud Service Powered Downloaders (report)
- MITRE ATT&CK — S1171 (report)