acdriver.sys

Malicious Windows Hardware Compatibility Program 2026-09-15

Driver Name: acdriver.sys
SpcSpOpusInfo: OBSS
MD5: 0fa95f2cd4099204db590afac6691b12
SHA1: 820cf7b03e3d32d9968c703a7241a587c3aa1c18
SHA256: f77eb704a59d1553587655e20526b65cacbdf74d41734425a2c432801e1c8b14
Imphash: da38ed3ae64881d1e969323b907f8a13
Vhash: 024066651d151d151iz14xz
Authentihash: d8374a2c33f76acf48ecda8943cfa940541320914c1207c13883ec71d92a5825
Rich PE header hash: b88ae0df25ad9269248ef211ae6caa57
SSDEEP: 384:0Uw9CDRmGl5Zq1E5plND7hw/WT+/ORdth3STjdAA1m5wMRaMucV6y//Z1H:5w9CDRV7Sukq3STxf1mlRaXY6aj
TLSH: T182C26CC913A810D7FA99D474C6B4FD43B87AFA53271285EF40A4D6141FA3BC4A736B18
PDB path: D:\project\protect_drive\momo\x64\Release\acdriver.pdb
Compilation time: 2026-06-29
Country submitter: China

Description

The malicious driver is a kernel loader that loads an unsigned kernel driver received from a user-mode client, and its user-to-kernel communication is unusual. The driver still uses an IOCTL dispatch path, but instead of exchanging data through the usual buffered or direct I/O methods, the user-mode client places the payload at *(PEB + 0x2D0) — the AppCompatFlagsUser field.

Reference: PebGhost rootkit loader