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{51b9c91c-8e38-40ae-80de-58a590512b6b}w.sys

TasticSurf

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {51b9c91c-8e38-40ae-80de-58a590512b6b}w.sys by TasticSurf 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 “{51b9c91c-8e38-40ae-80de-58a590512b6b}w”.
Publisher:
StdLib  (signed by TasticSurf)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
d02a6c52d6c379b16f9fbec619670a2a

SHA-1:
d55169668638baa35d0c09d41145693c730b4acc

SHA-256:
5f907437488ff48f7d2400f947b894c3a2238b7edfc32d1c85553c351e7946c6

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:
11/27/2024 4:29:20 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.TasticSurf (M)
16.2.25.15

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\{51b9c91c-8e38-40ae-80de-58a590512b6b}w.sys

Digital Signature
Signed by:
TasticSurf

Authority:
VeriSign, Inc.

Valid from:
11/3/2014 10:00:00 PM

Valid to:
1/3/2016 9:59:59 PM

Subject:
CN=TasticSurf, O=TasticSurf, 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:
6D2C37BF960997763055AC9274C52D6C

File PE Metadata
Compilation timestamp:
11/18/2014 10:31:46 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:dN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddTc7:fhUcpH/0+LCf7EziDHhdy7

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:
{51b9c91c-8e38-40ae-80de-58a590512b6b}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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