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Microsoft Teams as a LOLbin

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Andrew Kisliakov 2022-01-17 08:11:47 +00:00
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---
Name: Teams.exe
Description: Electron runtime binary which runs the Teams application
Author: Andrew Kisliakov
Created: 2022-01-17
Commands:
- Command: Teams.exe
Description: Generate JavaScript payload and package.json, and save to %LOCALAPPDATA%\Microsoft\Teams\current\app\ before executing.
Usecase: Execute JavaScript code
Category: Execute
Privileges: User
MitreID: T1218
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Teams.exe
Description: Generate JavaScript payload and package.json, archive in ASAR file and save to %LOCALAPPDATA%\Microsoft\Teams\current\app.asar before executing.
Usecase: Execute JavaScript code
Category: Execute
Privileges: User
MitreID: T1218
OperatingSystem: Windows 7 and up with Microsoft Teams installed
Full_Path:
- Path: %LOCALAPPDATA%\Microsoft\Teams\current\Teams.exe
Code_Sample:
- Code: https://github.com/lltltk/LOLBAS-research/tree/master/Teams
Detection:
- IOC: %LOCALAPPDATA%\Microsoft\Teams\current\app directory created
- IOC: %LOCALAPPDATA%\Microsoft\Teams\current\app.asar file created/modified by non-Teams installer/updater
Resources:
- Link: https://l--k.uk/2022/01/16/microsoft-teams-and-other-electron-apps-as-lolbins/
Acknowledgement:
- Person: Andrew Kisliakov