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{8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64.sys

Yula

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64.sys by Yula 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 “{8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64”.
Publisher:
StdLib  (signed by Yula)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
c977c5b2f1e4b59de90f92cb9dbc505f

SHA-1:
87118d845f9878b23881cf71d63c064515b877c5

SHA-256:
df71b998af2733d601c7cef79bf26660ea8e231c322adb3b4d072aaa8e27402e

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:
11/5/2024 8:20:21 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.2.27.12

File size:
47.6 KB (48,776 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\{8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64.sys

Digital Signature
Signed by:
Yula

Authority:
VeriSign, Inc.

Valid from:
3/10/2015 8:00:00 PM

Valid to:
4/9/2016 7:59:59 PM

Subject:
CN=Yula, O=Yula, 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:
27284D3180DC36E2DF216CDD159FDC27

File PE Metadata
Compilation timestamp:
3/14/2016 6:28:13 AM

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:
6.3909

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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