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{91975f83-f39c-43cf-aad4-0b3396b0f6db}gw.sys

middle pages

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {91975f83-f39c-43cf-aad4-0b3396b0f6db}gw.sys by middle pages has been detected as adware by 32 anti-malware scanners. It runs as a Windows kernel mode device driver named “{91975f83-f39c-43cf-aad4-0b3396b0f6db}Gw”. 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 middle pages)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
1db256de7a4ed091868aa7a00e6641a8

SHA-1:
4f14923cb0286a6849440a17738f8e4df8fd5a1f

SHA-256:
ddfec78535c21d98dfc9ed2a38d480318a9ec756c3f55b4d7a67d4d3abb338b8

Scanner detections:
32 / 68

Status:
Adware

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

Analysis date:
4/24/2024 11:39:05 PM UTC  (a few moments ago)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
354

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.203.36

avast!
Win32:BrowseFox-HU [PUP]
2014.9-160215

AVG
Generic
2017.0.2832

Baidu Antivirus
Adware.Win32.Yotoon
4.0.3.16215

Bitdefender
Adware.BrowseFox.V
1.0.20.230

Bkav FE
W32.HfsAdware
1.3.0.6379

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

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20773

Dr.Web
Trojan.Yontoo.1741
9.0.1.046

Emsisoft Anti-Malware
Adware.BrowseFox.V
8.16.02.15.07

Fortinet FortiGate
Adware/Yotoon
2/15/2016

F-Prot
W32/S-a7161e1c
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
11.2016-15-02_2

G Data
Adware.BrowseFox
16.2.24

K7 AntiVirus
Unwanted-Program
13.191.14689

Kaspersky
not-a-virus:AdWare.Win32.Yotoon
14.0.0.656

McAfee
Artemis!E7EE05E36E7A
5600.6488

MicroWorld eScan
Adware.BrowseFox.V
17.0.0.138

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.30.0.64448

Norman
Adware.BrowseFox.V
11.20160215

nProtect
Adware.BrowseFox.V
15.01.19.01

Panda Antivirus
Trj/CI.A
16.02.15.07

Qihoo 360 Security
Win32/Virus.Adware.618
1.0.0.1015

Quick Heal
AdWare.Yotoon.r6 (Not a Virus)
2.16.14.00

Reason Heuristics
PUP.Yontoo.middlepages (M)
16.2.15.19

Sophos
Generic PUA PA
4.98

Trend Micro House Call
Suspicious_GEN.F47V0109
7.2.46

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Trojan.Win32.Generic
36802

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.2039

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\{91975f83-f39c-43cf-aad4-0b3396b0f6db}gw.sys

Digital Signature
Signed by:
middle pages

Authority:
VeriSign, Inc.

Valid from:
10/7/2014 2:00:00 AM

Valid to:
10/3/2015 1:59:59 AM

Subject:
CN=middle pages, O=middle pages, 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:
01FD540333A96486522A2EDFD3C2E0B3

File PE Metadata
Compilation timestamp:
1/12/2015 6:24:16 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:RN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddrEgPxMk:zhUcpH/0+LCf7EziDHhd4k

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:
{91975f83-f39c-43cf-aad4-0b3396b0f6db}Gw

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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