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{9642c3ef-5a92-4f93-9b80-c77005b19940}w.sys

TessView

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {9642c3ef-5a92-4f93-9b80-c77005b19940}w.sys by TessView has been detected as adware by 22 anti-malware scanners. It runs as a Windows kernel mode device driver named “{9642c3ef-5a92-4f93-9b80-c77005b19940}w”. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages.
Publisher:
StdLib  (signed by TessView)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
e2f4588c6679f5a396142c7b9289be02

SHA-1:
f03a0b0d23d148517840b639804d185148aac0f3

SHA-256:
b9bab23651e4e5ef056a2017d3451251aacd558322f5715ac80b67dee12abba2

Scanner detections:
22 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
4/23/2024 10:34:40 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
6213306

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.197.26

avast!
Win32:BrowseFox-EY [PUP]
141214-1

AVG
Generic
2015.0.3253

Bitdefender
Adware.BrowseFox.V
1.0.20.1780

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/19819

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20438

Dr.Web
hacktool program Tool.NetFilter.313
9.0.1.05190

Emsisoft Anti-Malware
Adware.BrowseFox.V
9.0.0.4668

F-Prot
W32/A-76f53fd6
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
5.13.68

G Data
Adware.BrowseFox
14.12.24

McAfee
Trojan.Artemis!E2F4588C6679
16.8.708.2

MicroWorld eScan
Adware.BrowseFox.V
15.0.0.1068

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.28.6.64267

Norman
Adware.BrowseFox.V
04.12.2014 14:30:06

nProtect
Adware.BrowseFox.V
14.12.19.01

Reason Heuristics
PUP.TessView.k
14.12.22.2

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Threat.4150696
35418

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.2012

File size:
42.2 KB (43,192 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\{9642c3ef-5a92-4f93-9b80-c77005b19940}w.sys

Digital Signature
Signed by:
TessView

Authority:
VeriSign, Inc.

Valid from:
2/4/2014 3:30:00 AM

Valid to:
2/5/2015 3:29:59 AM

Subject:
CN=TessView, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=TessView, 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:
3F35E503136B53896D71C7902553287E

File PE Metadata
Compilation timestamp:
11/15/2014 3:59:02 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:NN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddeoHh:vhUcpH/0+LCf7EziDHhdv

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...
 
[+]

Entropy:
6.6130

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{9642c3ef-5a92-4f93-9b80-c77005b19940}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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