[SystemBC](https://attack.mitre.org/software/S9001) is a malware family offered as a malware-as-a-service (MaaS) that is used to establish command and control and facilitate follow-on activity, including ransomware deployment.[SystemBC](https://attack.mitre.org/software/S9001) executes a variety of tasks including setting up SOCKS5 proxies, maintaining persistence, ingesting malicious files, and handing C2 communication. [SystemBC](https://attack.mitre.org/software/S9001) was first detected in 2018, and has been used by [Wizard Spider](https://attack.mitre.org/groups/G0102) since at least 2020, and by [FIN7](https://attack.mitre.org/groups/G0046) since at least 2022.(Citation: TrumanKroll_SYSTEMBCServer_Jan2024)(Citation: SophosGnGal_SystemBC_Dec2020)(Citation: BlackBasta)(Citation: AhnLab_SystemBC_Apr2022)(Citation: Lumen_SystemBC_Sept2025)