
DarkBlinders Shifts to AppDomainManager Injection and GitHub C2 Against Israeli and Kurdish Targets
Iran-nexus DarkBlinders refined its ShelbyLoader/SHELBYC2 toolkit with AppDomainManager injection to hit Israeli and Kurdish government targets. Evidence from three independent reports shows consistent GitHub C2 and developer-tool abuse without state attribution. The campaign demonstrates low-signature persistence that will likely target additional cloud environments.
Dream Research Labs documented credential-harvesting domains mimicking OWA and cloud services alongside StarkMeet decoys that executed ShelbyLoader V2. The chain used .csproj files for AppDomainManager injection, DLL sideloading, and SHELBYC2 callbacks to GitHub repositories for tasking and exfiltration. No code overlap appears with known Iranian clusters tracked by Elastic or Group-IB. Palo Alto Unit 42 previously linked the same infrastructure to fake Dubai Airports recruitment lures that delivered identical payloads to Iraqi targets starting March 2026. The pattern shows iterative refinement of developer-tool abuse rather than new zero-days. Evidence trails from domain registrations, GitHub commit histories, and victim telemetry indicate continued focus on aviation, telecom, and now regional government cloud environments. Official Iranian attribution remains absent; technical indicators point only to operator familiarity with prior REF8685 tooling. Operational significance lies in the low-cost social-engineering pipeline that bypasses ETW monitoring and persists through signed binaries. Next phase likely involves expanded use of Blackwood tunnels for lateral movement inside compromised cloud tenants.
Elastic: At least three new GitHub repos hosting SHELBYC2 will appear with Iranian ASN commits before March 2027
Sources (3)
- [1]Primary Source(https://www.dreamresearchlabs.com/reports/darkblinders-2026)
- [2]Supporting Source(https://unit42.paloaltonetworks.com/blinder-tunnel-campaign/)
- [3]Supporting Source(https://www.elastic.co/security-labs/ref8685-shelbyloader)