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{9f93bd66-d3d2-427d-b37f-743603e2388d}w.sys

Zebar

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {9f93bd66-d3d2-427d-b37f-743603e2388d}w.sys by Zebar has been detected as adware by 26 anti-malware scanners. It runs as a Windows kernel mode device driver named “{9f93bd66-d3d2-427d-b37f-743603e2388d}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 Zebar)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
e37c58c96988e8775ce6ed62c113c84f

SHA-1:
e0f8373c8a08a92e27632913efee3ef6eea7ea3e

SHA-256:
08178f4c10e0ed848805ecc463ed0389c46b9474eef0bdb7bc9ae327d7639f9f

Scanner detections:
26 / 68

Status:
Adware

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

Analysis date:
4/25/2024 11:07:08 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.N
801

Agnitum Outpost
Trojan.BPlug
7.1.1

AhnLab V3 Security
PUP/Win32.BrowseFox
2014.10.12

Avira AntiVirus
Adware/BrowseFox.A.197
7.11.176.148

AVG
Zebrar
2015.0.3279

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141126

Bitdefender
Adware.SwiftBrowse.N
1.0.20.1650

Clam AntiVirus
Win.Adware.Yotoon
0.98/21511

Comodo Security
Application.Win32.RiskWare.NetFilter.D
19774

Dr.Web
Trojan.BPlug.123
9.0.1.05190

Emsisoft Anti-Malware
Adware.Mplug.DC
9.0.0.4570

ESET NOD32
Win64/BrowseFox.BW potentially unwanted application
7.0.302.0

F-Prot
W32/A-3fb60f37
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.N
11.2014-26-11_4

G Data
Adware.SwiftBrowse
14.11.24

IKARUS anti.virus
AdWare.SwiftBrowse
t3scan.1.7.8.0

McAfee
Artemis!8E91755B7414
5600.6935

MicroWorld eScan
Adware.SwiftBrowse.N
15.0.0.990

NANO AntiVirus
Riskware.Win32.Yotoon.ddghtt
0.28.2.62440

nProtect
Adware.SwiftBrowse.N
14.05.30.01

Reason Heuristics
PUP.Zebar.k
14.11.26.7

Sophos
BrowseSmart
4.98

Trend Micro House Call
Suspicious_GEN.F47V0801
7.2.330

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Adware.SwiftBrowse
33668

Zillya! Antivirus
Adware.Yotoon.Win64.8
2.0.0.1951

File size:
51.2 KB (52,408 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\{9f93bd66-d3d2-427d-b37f-743603e2388d}w.sys

Digital Signature
Signed by:
Zebar

Authority:
VeriSign, Inc.

Valid from:
3/9/2014 9:00:00 PM

Valid to:
3/10/2015 8:59:59 PM

Subject:
CN=Zebar, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Zebar, 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:
443A7E0E2025885A74F146162C4BEE38

File PE Metadata
Compilation timestamp:
8/6/2014 8:52:14 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:oIsHpnKnCBSqUPJHKQpkJvRpvqIT2bcWiJmOt13g2rp3lne3:vsHRKnLJqQpkIITsiTt1xtS

Entry address:
0xC03E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 62, 50, FF, FF, CC, CC, 74, C1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BC, C4, 00, 00, C0, A0, 00, 00, B4, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 12, C5, 00, 00, 00, A0, 00, 00, EC, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, AE, C8, 00, 00, 38, A0, 00, 00, C4, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A6, C9, 00, 00, 10, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, EA, C4, 00, 00, FE, C4, 00, 00, D6, C4...
 
[+]

Code size:
37 KB (37,888 bytes)

Driver
Display name:
{9f93bd66-d3d2-427d-b37f-743603e2388d}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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