IOC: HKCU\Software\Microsoft\OneDrive\UpdateOfficeConfig\UpdateRingSettingURLFromOC being set to a suspicious non-Microsoft controlled URL
IOC: Reports of downloading from suspicious URLs in %localappdata%\OneDrive\setup\logs\StandaloneUpdate_*.log files
Download
Download a file from the web address specified in HKCU\Software\Microsoft\OneDrive\UpdateOfficeConfig\UpdateRingSettingURLFromOC. ODSUUpdateXMLUrlFromOC and UpdateXMLUrlFromOC must be equal to non-empty string values in that same registry key. UpdateOfficeConfigTimestamp is a UNIX epoch time which must be set to a large QWORD such as 99999999999 (in decimal) to indicate the URL cache is good. The downloaded file will be in %localappdata%\OneDrive\StandaloneUpdater\PreSignInSettingsConfig.json
OneDriveStandaloneUpdater
Usecase: Download a file from the Internet without executing any anomalous executables with suspicious arguments
Privileges required: User
OS: Windows 10
MITRE ATT&CK®: T1105