Technical Analysis of 2CLoader

This report provides a detailed technical analysis of 2CLoader, a sophisticated Windows loader that uses rolling XOR and AES-GCM to decrypt embedded payloads, supports in-memory RunPE/LoadPE execution, implements anti-VM and anti-debug checks, places inline trampoline hooks for environment and network spoofing, and communicates with C2 via XOR-encrypted JSON over HTTP; ThreatLabz observed 2CLoader primarily distributing information stealers such as Vidar and Remus and released tooling to aid payload decryption and analysis.