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{8d12a420-844f-4d13-97dd-a6fd7af8d0a1}w64.sys

Xaven

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {8d12a420-844f-4d13-97dd-a6fd7af8d0a1}w64.sys by Xaven has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a Windows 64-bit kernel mode device driver named “{8d12a420-844f-4d13-97dd-a6fd7af8d0a1}w64”.
Publisher:
StdLib  (signed by Xaven)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
0ff6a595baa9b88a882dccbf5a8d220b

SHA-1:
f516ab1fee2e0453d7a4f9e1d36596d78331c609

SHA-256:
6fde647bafecece8f92e4ac3897720f16289b418baaa1887ddefd6a1e29f0e47

Scanner detections:
1 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/25/2024 4:31:23 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.1.22.18

File size:
43.7 KB (44,720 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Common path:
C:\Windows\System32\drivers\{8d12a420-844f-4d13-97dd-a6fd7af8d0a1}w64.sys

Digital Signature
Signed by:
Xaven

Authority:
VeriSign, Inc.

Valid from:
10/7/2013 8:00:00 AM

Valid to:
10/8/2014 7:59:59 AM

Subject:
CN=Xaven, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Xaven, L=San Diego, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
0A5CE2C650CAC6A06298CBDABAEB9E5A

File PE Metadata
Compilation timestamp:
9/13/2014 7:33:02 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

Entry address:
0xB064

Entry point:
48, 83, EC, 28, 4C, 8B, C2, 4C, 8B, C9, E8, 95, FF, FF, FF, 49, 8B, D0, 49, 8B, C9, 48, 83, C4, 28, E9, C6, 60, FF, FF, CC, CC, 38, B2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, B6, 00, 00, 60, 81, 00, 00, 28, B1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, B9, 00, 00, 50, 80, 00, 00, D8, B0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, BA, 00, 00, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 9A, BA, 00, 00, 00, 00, 00, 00, 86, BA, 00, 00...
 
[+]

Entropy:
6.3748

Code size:
30.5 KB (31,232 bytes)

Driver
Display name:
{8d12a420-844f-4d13-97dd-a6fd7af8d0a1}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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