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{51b9c91c-8e38-40ae-80de-58a590512b6b}gw64.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}gw64.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 64-bit kernel mode device driver named “{51b9c91c-8e38-40ae-80de-58a590512b6b}Gw64”.
Publisher:
StdLib  (signed by TasticSurf)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
4a869286c70d0c448b0602450aa4f74d

SHA-1:
805adc98e75ff91fb9c280c3533c1d45fab29f2e

SHA-256:
5fe47d484dab38581ff9e8a07869089082605bc8e4a043dc8ac3c19af2be7bf8

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:
5/21/2024 7:45:57 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.TasticSurf (M)
16.2.27.9

File size:
47.6 KB (48,784 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\{51b9c91c-8e38-40ae-80de-58a590512b6b}gw64.sys

Digital Signature
Signed by:
TasticSurf

Authority:
VeriSign, Inc.

Valid from:
11/4/2014 5:00:00 AM

Valid to:
1/4/2016 4:59:59 AM

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 4:48:24 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:lo7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD3Qo:iFID6EGnLA8AFJTNEVmDf

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:
6.3920

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{51b9c91c-8e38-40ae-80de-58a590512b6b}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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