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{b9a19c25-a741-47e5-91a2-0b62bef307ff}w.sys

RightSurf

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {b9a19c25-a741-47e5-91a2-0b62bef307ff}w.sys by RightSurf has been detected as adware by 39 anti-malware scanners. It runs as a Windows kernel mode device driver named “{b9a19c25-a741-47e5-91a2-0b62bef307ff}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 RightSurf)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
c7320e11d5abe1ee91ea524b6dec23d5

SHA-1:
86053e50e4a03915bfd1e8e2728807ebeaad30ed

SHA-256:
0b7725eaa8e0fe96dcd2b9d36a0b20cf232c68aa3332584541513f548c42feae

Scanner detections:
39 / 68

Status:
Adware

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

Analysis date:
4/26/2024 11:07:01 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.Mplug.DC
741

Agnitum Outpost
PUA.Yotoon
7.1.1

AhnLab V3 Security
PUP/Win32.BrowseFox
2015.01.25

Avira AntiVirus
Adware/BrowseFox.A.168
7.11.204.248

avast!
Win32:BrowseFox-Z [PUP]
150101-1

AVG
Generic
2016.0.3219

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.15125

Bitdefender
Adware.Mplug.DC
1.0.20.125

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Browsefox-60
0.98/19974

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20112

Dr.Web
hacktool program Tool.NetFilter.1
9.0.1.05190

Emsisoft Anti-Malware
Adware.Mplug.DC
8.15.01.25.12

F-Prot
W32/A-dd00b781
v6.4.7.1.166

F-Secure
Adware.Mplug.DC
11.2015-25-01_1

G Data
Adware.Mplug.DC
15.1.24

McAfee
Artemis!54900C45922C
5600.6875

MicroWorld eScan
Adware.Mplug.DC
16.0.0.75

NANO AntiVirus
Riskware.Win32.Yotoon.ddghtt
0.28.2.61721

nProtect
Adware.Mplug.DC
14.11.17.01

Qihoo 360 Security
Win32/Virus.Adware.c12
1.0.0.1015

Reason Heuristics
PUP.Yontoo.RightSurf
15.1.25.0

Trend Micro House Call
Suspicious_GEN.F47V0620
7.2.25

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Threat.4150696
31208

Zillya! Antivirus
Adware.Yotoon.Win64.1
2.0.0.1984

File size:
38.2 KB (39,096 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{b9a19c25-a741-47e5-91a2-0b62bef307ff}w.sys

Digital Signature
Signed by:
RightSurf

Authority:
VeriSign, Inc.

Valid from:
11/27/2013 5:30:00 AM

Valid to:
11/28/2014 5:29:59 AM

Subject:
CN=RightSurf, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=RightSurf, 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:
1E2DA13430E7E93CEF3759B2E4F7A34B

File PE Metadata
Compilation timestamp:
9/13/2014 5:02:59 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:af5OQ5p9MZq9Vkh5z8tZfJm/6D1GqA+5+TFpEwXODJ:af5H5pH+x8t1c/+Gd+5/4Q

Entry address:
0x903E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 20, 80, FF, FF, CC, CC, 74, 91, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, AE, 94, 00, 00, C0, 70, 00, 00, B4, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 04, 95, 00, 00, 00, 70, 00, 00, EC, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A0, 98, 00, 00, 38, 70, 00, 00, C4, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 98, 99, 00, 00, 10, 70, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, DC, 94, 00, 00, F0, 94, 00, 00, C8, 94...
 
[+]

Entropy:
6.6566

Code size:
24.5 KB (25,088 bytes)

Driver
Display name:
{b9a19c25-a741-47e5-91a2-0b62bef307ff}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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