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{21f7cd32-4cb1-4b86-afa4-ca2be87a4b89}w.sys

Cantataweb

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {21f7cd32-4cb1-4b86-afa4-ca2be87a4b89}w.sys by Cantataweb has been detected as adware by 22 anti-malware scanners. It runs as a Windows kernel mode device driver named “{21f7cd32-4cb1-4b86-afa4-ca2be87a4b89}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 Cantataweb)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
512c99c9e80be8b785f3f87f124be561

SHA-1:
27526469b5a028b6ade94202b782db640ddb41c4

SHA-256:
49870ceec8ca051971c757f9a93b421b6dfb7b1892adcf0663a0bfc94fec4b11

Scanner detections:
22 / 68

Status:
Adware

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

Analysis date:
4/26/2024 5:54:49 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
5830612

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.188.92

AVG
Generic
2015.0.3281

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141123

Bitdefender
Adware.BrowseFox.V
1.0.20.1635

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/21511

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20178

Dr.Web
hacktool program Tool.NetFilter.313
9.0.1.05190

Emsisoft Anti-Malware
Adware.BrowseFox.V
9.0.0.4570

ESET NOD32
Win32/BrowseFox.U potentially unwanted application
7.0.302.0

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

F-Secure
Adware.BrowseFox.V
11.2014-23-11_1

G Data
Adware.BrowseFox
14.11.24

MicroWorld eScan
Adware.BrowseFox.V
15.0.0.981

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.28.6.63474

Norman
BrowseFox.EC
11.20141123

nProtect
Adware.BrowseFox.V
14.11.21.01

Reason Heuristics
PUP.Cantataweb.k
14.11.23.22

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Threat.4150696
35010

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.1991

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\{21f7cd32-4cb1-4b86-afa4-ca2be87a4b89}w.sys

Digital Signature
Signed by:
Cantataweb

Authority:
VeriSign, Inc.

Valid from:
10/6/2014 9:00:00 PM

Valid to:
10/7/2015 8:59:59 PM

Subject:
CN=Cantataweb, O=Cantataweb, 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:
51FE05E2A96412C5062E1F77B3A16598

File PE Metadata
Compilation timestamp:
11/23/2014 11:30:31 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:LN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddDmO:xhUcpH/0+LCf7EziDHhd4O

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:
{21f7cd32-4cb1-4b86-afa4-ca2be87a4b89}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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