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{8d075910-3332-4e1b-83a0-de523a191c04}w.sys

Skywebber

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {8d075910-3332-4e1b-83a0-de523a191c04}w.sys by Skywebber 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 kernel mode device driver named “{8d075910-3332-4e1b-83a0-de523a191c04}w”.
Publisher:
StdLib  (signed by Skywebber)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
14d2a7b5912c83213a2aa95e0acd4763

SHA-1:
d7508357eff24c54e6ae050162b9d6b9cb649958

SHA-256:
4ba702dbd2779851cc81999dd4ab5de37e0a3256d5db4f018accf83b25d4250a

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 11:11:18 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
16.7.29.15

File size:
38.2 KB (39,096 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{8d075910-3332-4e1b-83a0-de523a191c04}w.sys

Digital Signature
Signed by:
Skywebber

Authority:
VeriSign, Inc.

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

Valid to:
10/8/2014 6:59:59 AM

Subject:
CN=Skywebber, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Skywebber, 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:
06606AB25DD3CD2FC4C1610240BD0EF8

File PE Metadata
Compilation timestamp:
9/13/2014 6:32:59 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:yf5OQ5p9MZq9Vkh5z8tZfJm/6D1GqA+5+TFpEwXOo:yf5H5pH+x8t1c/+Gd+5/4F

Entry address:
0x903E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 20, 80, FF, FF, CC, CC, 74, 91, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, AE, 94, 00, 00, C0, 70, 00, 00, B4, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 04, 95, 00, 00, 00, 70, 00, 00, EC, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A0, 98, 00, 00, 38, 70, 00, 00, C4, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 98, 99, 00, 00, 10, 70, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, DC, 94, 00, 00, F0, 94, 00, 00, C8, 94...
 
[+]

Code size:
24.5 KB (25,088 bytes)

Driver
Display name:
{8d075910-3332-4e1b-83a0-de523a191c04}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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