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{a4859c40-0b4e-48ca-81ae-fe6f139eaa49}w.sys

PlumoWeb

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {a4859c40-0b4e-48ca-81ae-fe6f139eaa49}w.sys by PlumoWeb 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 “{a4859c40-0b4e-48ca-81ae-fe6f139eaa49}w”.
Publisher:
StdLib  (signed by PlumoWeb)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
8675104722660341e6ee1ca67b0f9477

SHA-1:
2099044c4b5b5188a4cb7df056618133dd5a701e

SHA-256:
a1f35454f6355388730665a5a601597f024f12b28a0895cbd09f4c7c29db2503

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:
4/19/2024 8:08:29 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.16.13

File size:
42.1 KB (43,152 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{a4859c40-0b4e-48ca-81ae-fe6f139eaa49}w.sys

Digital Signature
Signed by:
PlumoWeb

Authority:
VeriSign, Inc.

Valid from:
8/4/2014 9:00:00 PM

Valid to:
8/5/2015 8:59:59 PM

Subject:
CN=PlumoWeb, O=PlumoWeb, 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:
792D14E276E932D00A4F272C4ED5B70E

File PE Metadata
Compilation timestamp:
12/18/2014 9:22:45 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

Entry address:
0xA03E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 20, 70, FF, FF, CC, CC, 94, A1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, CE, A4, 00, 00, E0, 80, 00, 00, B4, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 24, A5, 00, 00, 00, 80, 00, 00, EC, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A4, A9, 00, 00, 38, 80, 00, 00, C4, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 9C, AA, 00, 00, 10, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, FC, A4, 00, 00, 10, A5, 00, 00, E8, A4...
 
[+]

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{a4859c40-0b4e-48ca-81ae-fe6f139eaa49}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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