Merge pull request #191 from lltltk/master

Create Teams.exe

yml/OtherMSBinaries/Teams.yml

@@ -0,0 +1,31 @@
+---
+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
+  - 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
+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