Task Manager showed no new processes. No registry writes. No network beacons. The binary's entropy was near-zero—like a random number generator having a seizure.
rundll.exe.7z isn't malware. It's a message . And it's already open. rundll.exe.7z
I executed it.
The screen went black for 2.3 seconds. When it returned, a single command prompt window had opened. The cursor blinked patiently. Above it, one line: Task Manager showed no new processes
I recorded it.