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{491d7eff-4c48-4a10-82e4-166521125466}w64.sys

WebSpades

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {491d7eff-4c48-4a10-82e4-166521125466}w64.sys by WebSpades 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 “{491d7eff-4c48-4a10-82e4-166521125466}w64”.
Publisher:
StdLib  (signed by WebSpades)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
65db10e342f98ce4f0517bdfe419b970

SHA-1:
b13a3cee923fa02d4ec03086f501866b579780a1

SHA-256:
91dc28636e1ceb9b8425c6bd64551a91b44f771d59e7a124f321157c7f7eccf2

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:
12/24/2024 11:39:18 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.14.15

File size:
47.6 KB (48,784 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{491d7eff-4c48-4a10-82e4-166521125466}w64.sys

Digital Signature
Signed by:
WebSpades

Authority:
VeriSign, Inc.

Valid from:
2/3/2015 1:00:00 PM

Valid to:
3/5/2016 12:59:59 PM

Subject:
CN=WebSpades, O=WebSpades, L=Santa Monica, 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:
7B4634BD8A2F381781B9A08D66480631

File PE Metadata
Compilation timestamp:
2/18/2015 6:31:22 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

Entry address:
0xC064

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, E2, 50, FF, FF, CC, CC, 78, C2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 54, C6, 00, 00, A0, 91, 00, 00, 28, C1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, DA, CA, 00, 00, 50, 90, 00, 00, D8, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, D2, CB, 00, 00, 00, 90, 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, B6, CB, 00, 00, 00, 00, 00, 00, A2, CB, 00, 00...
 
[+]

Entropy:
6.3920

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{491d7eff-4c48-4a10-82e4-166521125466}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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