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{f365189d-3e18-4f01-8423-a1ed102ed962}t.sys

Web Layers

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {f365189d-3e18-4f01-8423-a1ed102ed962}t.sys by Web Layers 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 “{f365189d-3e18-4f01-8423-a1ed102ed962}t”.
Publisher:
StdLib  (signed by Web Layers)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
ed43f00f10eca5ece023fc845b064191

SHA-1:
3db1857dc03e582fbbd48d4d5b15acfb87a3a6a8

SHA-256:
c7b92e0368b8a9d2975de0c1c2a3bd7aed9e532e5f76c06cf22bae7b78db97d6

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 9:36:30 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.WebLayers (M)
16.2.14.14

File size:
54.6 KB (55,872 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\{f365189d-3e18-4f01-8423-a1ed102ed962}t.sys

Digital Signature
Signed by:
Web Layers

Authority:
VeriSign, Inc.

Valid from:
7/31/2013 3:00:00 AM

Valid to:
8/1/2015 2:59:59 AM

Subject:
CN=Web Layers, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Web Layers, 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:
68B083249006BA50D35F50A8F44CD7D4

File PE Metadata
Compilation timestamp:
6/16/2015 9:30:23 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:go6LohZZMITF7zKLV3fXoKKxaFtFkW4VIWPLqvH9EQZLN+p60CeVRoXo:go6+pT1UvYDEHFV4nPe/kpvCeVO4

Entry address:
0xA9BE

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 2A, E4, FF, FF, CC, CC, 34, AA, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 04, AE, 00, 00, 94, 93, 00, 00, 20, AA, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 3A, AE, 00, 00, 80, 93, 00, 00, 2C, AA, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 56, AE, 00, 00, 8C, 93, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 26, AE, 00, 00, 12, AE, 00, 00, 00, 00, 00, 00, 42, AE, 00, 00, 00, 00, 00, 00, 2C, AB, 00, 00, 44, AB, 00, 00, 56, AB...
 
[+]

Entropy:
6.3471

Code size:
37 KB (37,888 bytes)

Driver
Display name:
{f365189d-3e18-4f01-8423-a1ed102ed962}t

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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