AN0550
Analytic 0550
Windows
Abuse of ClickOnce applications where rundll32.exe invokes dfshim.dll with ShOpenVerbApplication or dfsvc.exe spawns unexpected child processes or loads unsigned modules.
WinEventLog:Security
EventCode=4688
WinEventLog:Sysmon
EventCode=7
WinEventLog:Microsoft-Windows-Security-Mitigations/KernelMode
ETW telemetry indicating ClickOnce deployment (dfsvc.exe) launching payloads
[TimeWindow]
The correlation window for dfsvc.exe/rundll32.exe execution and subsequent module loads or child processes (e.g., 0–10 minutes).
[KnownClickOnceApps]
Whitelist of legitimate ClickOnce applications and paths.
[SuspiciousChildList]
Child processes considered abnormal when launched by dfsvc.exe or rundll32.exe.