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{8d075910-3332-4e1b-83a0-de523a191c04}w64.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}w64.sys by Skywebber has been detected as adware by 7 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{8d075910-3332-4e1b-83a0-de523a191c04}w64”.
Publisher:
StdLib  (signed by Skywebber)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
06566edc9e1dadc65a3913968057691b

SHA-1:
6d06876a46f127039cce13562fec60a3c4517c43

SHA-256:
00b089cfa4830d889ecd71c135728156c7ce7c234fc9e72d9fc9667c5024909f

Scanner detections:
7 / 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 5:53:43 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Trojan.BPlug
7.1.1

Dr.Web
Trojan.BPlug.123
9.0.1.05190

herdProtect (fuzzy)
variant of wstlibg64.sys (Adware)
2014.9.11.10

IKARUS anti.virus
AdWare.SpadeCast
t3scan.1.6.1.0

Reason Heuristics
PUP.Skywebber.m
14.8.8.0

Sophos
BrowseSmart
4.98

VIPRE Antivirus
Threat.4150696
31208

File size:
59.7 KB (61,112 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{8d075910-3332-4e1b-83a0-de523a191c04}w64.sys

Digital Signature
Signed by:
Skywebber

Authority:
VeriSign, Inc.

Valid from:
10/7/2013 5:30:00 AM

Valid to:
10/8/2014 5:29:59 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:
1/31/2014 6:15:30 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:Oot2dxF9O8ZF33iqiIy938bWp9XcfBvJkowidIn9eea:O9JRicy938ip9ea1j9ja

Entry address:
0xF064

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, 2E, 20, FF, FF, CC, CC, 38, F2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, F6, 00, 00, 60, C1, 00, 00, 28, F1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, F9, 00, 00, 50, C0, 00, 00, D8, F0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, FA, 00, 00, 00, C0, 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, FA, 00, 00, 00, 00, 00, 00, 86, FA, 00, 00...
 
[+]

Entropy:
5.9650

Code size:
46.5 KB (47,616 bytes)

Driver
Display name:
{8d075910-3332-4e1b-83a0-de523a191c04}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


herdProtect is a second line of defense malware removal platform powered by 68 anti-malware engines in the cloud. Since no single anti-malware program is perfect 100% of the time, herdProtect utilizes a 'herd' of multiple engines to guarantee the widest coverage and the earliest possible detection.