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Home/ATT&CK/Software/S1099
MITRE ATT&CK Malware

Samurai (S1099)

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[Samurai](https://attack.mitre.org/software/S1099) is a passive backdoor that has been used by [ToddyCat](https://attack.mitre.org/groups/G1022) since at least 2020. [Samurai](https://attack.mitre.org/software/S1099) allows arbitrary C# code execution and is used with multiple modules for remote administration and lateral movement.(Citation: Kaspersky ToddyCat June 2022)

Platforms: Windows

▪Techniques implemented (19)

T1105Ingress Tool TransferT1095Non-Application Layer ProtocolT1543.003Windows ServiceT1573.001Symmetric CryptographyT1083File and Directory DiscoveryT1027.015CompressionT1112Modify RegistryT1027.004Compile After DeliveryT1132.001Standard EncodingT1012Query RegistryT1036.005Match Legitimate Resource Name or LocationT1090ProxyT1059.003Windows Command ShellT1071.001Web ProtocolsT1027.007Dynamic API ResolutionT1027Obfuscated Files or InformationT1106Native APIT1005Data from Local SystemT1518Software Discovery

▪Used by groups (1)

G1022ToddyCat
S1099on MITRE ATT&CK →

MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.