acdriver.sys

Malicious Windows Hardware Compatibility Program 2026-07-03

Driver Name: acdriver.sys
SpcSpOpusInfo: OBSS
MD5: 0c4f78cae793e9601540d0a08cffd51e
SHA1: 90a28ad46a2c4997ed504e2c27dafb8cd3bbf288
SHA256: eab035d86067b3e318ca35133e61eb25b2b97bb5c0346445f6ae4e6dc42f193f
Imphash: da38ed3ae64881d1e969323b907f8a13
Vhash: 064066651d151d151iz14xz
Authentihash: d8374a2c33f76acf48ecda8943cfa940541320914c1207c13883ec71d92a5825
Rich PE header hash: b88ae0df25ad9269248ef211ae6caa57
SSDEEP: 1536:v9CDRV7SBeczb7kTIgGo2s2E1pLU4ITHq:v9Cu3HgGoR2E1t7EHq
TLSH: T1FF435BD61A7C508BD9195D708378FA53AC76B7C31F9150EF2095F9201E933E2A33CA5A
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