​A Deep-dive Analysis of KARMA Ransomware

Cyble Research Labs analyzed the KARMA ransomware, a console-based x86 C/C++ Windows binary that encrypts files and appends the .KARMA extension, drops ransom notes (KARMA-ENCRYPTED.txt) with TOR and email contact details, and uses CryptoAPI (crypt32.dll). The report documents the execution flow (drive enumeration A–Z, thread creation, exclusions for system folders and specific file types, mutex creation), encryption routine, sample SHA256 hash and TOR URL IoC, and provides mitigation recommendations and mapped MITRE ATT&CK techniques.