acdriver.sys

Malicious Windows Hardware Compatibility Program 2026-09-15

Driver Name: acdriver.sys
SpcSpOpusInfo: OBSS
MD5: 524160afd5472b0570afcd58c7672f46
SHA1: 79de9ad6343e817228b51178fdb17834896e44e8
SHA256: 133cb83b66baee01c507dca2d3e83aa57034ebc09e570bddc358f9b827aa6d6f
Imphash: da38ed3ae64881d1e969323b907f8a13
Vhash: 024066651d151d151iz14xz
Authentihash: d8374a2c33f76acf48ecda8943cfa940541320914c1207c13883ec71d92a5825
Rich PE header hash: b88ae0df25ad9269248ef211ae6caa57
SSDEEP: 384:WUw9CDRmGl5Zq1E5plND7hw/hT+/ORdth3fR9z9YzKgFQ:Hw9CDRV7Spkq359zy2gFQ
TLSH: T1DBC28EC9139814C6EB99D474C2B8F9033C3ABA87571245EF45E4EA151FB3BC85B39B18
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