Malicious Inauthentic Falcon Crash Reporter Installer Delivers LLVM-Based Mythic C2 Agent Named Ciro
On July 24, 2024, an unattributed threat actor distributed a password-protected installer masquerading as an inauthentic Falcon Crash Reporter Installer to a German entity in an unattributed spear-phishing attempt. Subsequent analysis revealed that executing the installer with the threat actor-provided password leads to a novel execution chain in which an agent written to the Mythic command-and-control (C2)1 framework is executed as LLVM Intermediate Representation (IR) bitcode.