Return of Emotet: Malware Analysis

Executive Summary: This technical analysis documents the November 2021 resurgence of Emotet, detailing its anti-analysis techniques, encrypted C2 communications (ECDH/AES over HTTP cookies), modular architecture for credential/email theft and spamming, and observed Indicators of Compromise (sample hash, C2 addresses, public keys, module hashes). The report also highlights observed use of Cobalt Strike as a secondary payload, indicating elevated risk for follow-on ransomware or lateral-movement activity.