Sss.exe

Outside of security threats, the filename is used for legitimate software or fan-made modifications:

In professional security testing, the filename is sometimes used for custom-compiled tools: sss.exe

: Analysis by ESET's WeLiveSecurity linked this file to unidentified APT actors targeting entities in Taiwan and Vietnam. It was used to send host information (like IP addresses and usernames) to a command-and-control server. Outside of security threats, the filename is used

: In the S.T.A.L.K.E.R. Anomaly modding community, the "Screen Space Shaders" (SSS) mod uses a specialized sss.exe (often merged with DLTX) to handle advanced shader-based 2D scopes. 3. Red Teaming and Tools Anomaly modding community, the "Screen Space Shaders" (SSS)

If you found this file unexpectedly on your computer and do not play the games mentioned above, it is highly recommended to run a full system scan using reputable antivirus software, as it is a common name for generic malware. Did you say "Advanced" Persistent Threats? - WeLiveSecurity