The sub-techniques beta is now live! Read the release blog post for more info.


ISMInjector is a Trojan used to install another OilRig backdoor, ISMAgent. [1]

ID: S0189
Platforms: Windows
Contributors: Robert Falcone
Version: 1.0
Created: 16 January 2018
Last Modified: 17 October 2018

Techniques Used

Domain ID Name Use
Enterprise T1140 Deobfuscate/Decode Files or Information

ISMInjector uses the certutil command to decode a payload file.[1]

Enterprise T1027 Obfuscated Files or Information

ISMInjector is obfuscated with the off-the-shelf SmartAssembly .NET obfuscator created by[1]

Enterprise T1093 Process Hollowing

ISMInjector hollows out a newly created process RegASM.exe and injects its payload into the hollowed process.[1]

Enterprise T1053 Scheduled Task

ISMInjector creates scheduled tasks to establish persistence.[1]

Groups That Use This Software

ID Name References
G0049 OilRig [1]