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{6720ab04-7490-45d5-a249-361c4703ccbd}w.sys

brown bark

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {6720ab04-7490-45d5-a249-361c4703ccbd}w.sys by brown bark has been detected as adware by 22 anti-malware scanners. It runs as a Windows kernel mode device driver named “{6720ab04-7490-45d5-a249-361c4703ccbd}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 brown bark)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
3a0b2a2f52362a800f8200debaa86fcc

SHA-1:
461b1324a86a035e7052d876c48c0de4f7d5cd0f

SHA-256:
3582d1539ef4eec40e93652a33f55c727693be06601f79c7c5537446a6a37f9c

Scanner detections:
22 / 68

Status:
Adware

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

Analysis date:
4/18/2024 12:54:34 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
6496598

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.206.64

avast!
Win32:BrowseFox-GF [PUP]
150129-1

AVG
Generic
2016.0.3213

Bitdefender
Adware.BrowseFox.V
1.0.20.155

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/20008

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20910

Dr.Web
hacktool program Tool.NetFilter.313
9.0.1.05190

Emsisoft Anti-Malware
Adware.BrowseFox.V
9.0.0.4799

F-Prot
W32/S-a7161e1c
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
5.13.68

G Data
Adware.BrowseFox
15.1.25

K7 AntiVirus
Unwanted-Program
13.193.14818

MicroWorld eScan
Adware.BrowseFox.V
16.0.0.93

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.30.0.65070

Norman
Adware.BrowseFox.V
02.01.2015 13:58:24

nProtect
Adware.BrowseFox.V
15.01.30.01

Reason Heuristics
PUP.Yontoo
15.1.31.7

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Threat.4150696
36694

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.2049

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\{6720ab04-7490-45d5-a249-361c4703ccbd}w.sys

Digital Signature
Signed by:
brown bark

Authority:
VeriSign, Inc.

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

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

Subject:
CN=brown bark, O=brown bark, 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:
0656C30F8D16BCF3A8FDB0181DC60FCD

File PE Metadata
Compilation timestamp:
12/29/2014 9:50:07 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:2N0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddjWYYxH:6hUcpH/0+LCf7EziDHhd16H

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:
{6720ab04-7490-45d5-a249-361c4703ccbd}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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