S1099 · malware · ATT&CK software
Samurai
1 actor on record using it
Every mark is an actor ATT&CK records using this software. Red ones also exploit a CVE in CISA KEV.
Open S1099 on attack.mitre.orgSamurai is a passive backdoor that has been used by ToddyCat since at least 2020. Samurai allows arbitrary C# code execution and is used with multiple modules for remote administration and lateral movement.
Source: MITRE ATT&CK, S1099. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.
Every one of the 1 is a mark on the map. Named now: 1 to 1, most on record first.
Zoom in on the map and the dots under the middle of it are named where they are.
Data as of 2026-11-15. CVE List through 2026-11-15 · EPSS of 2026-11-15 · CISA KEV checked 2026-11-15. Sources: MITRE ATT&CK (© The MITRE Corporation, reproduced and distributed with its permission), the MISP Galaxy (CC0), and CyberSIXT's own coverage.