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{fa53d675-4680-455e-ac21-6ef151942a45}w.sys

App Bud

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {fa53d675-4680-455e-ac21-6ef151942a45}w.sys by App Bud has been detected as adware by 19 anti-malware scanners. It runs as a Windows kernel mode device driver named “{fa53d675-4680-455e-ac21-6ef151942a45}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 App Bud)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
528840b8c2ee38105dc5593a295965b0

SHA-1:
faa01d554bce62613b6cdd8cbf1741078058da2e

SHA-256:
8b7fb41e7bd64cd4a9e879343a25eefe58f3f60cda13ca2d89dfc62e6ac87320

Scanner detections:
19 / 68

Status:
Adware

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

Analysis date:
6/17/2025 12:28:56 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.N
924

Agnitum Outpost
PUA.Yotoon
7.1.1

AVG
Consurf
2015.0.3402

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.14725

Bitdefender
Adware.SwiftBrowse.N
1.0.20.1030

Clam AntiVirus
Win.Adware.Swiftbrowse-79
0.98/19479

Dr.Web
Trojan.BPlug.123
9.0.1.05190

Emsisoft Anti-Malware
Adware.SwiftBrowse.N
8.14.07.25.03

F-Secure
Adware.SwiftBrowse.N
11.2014-25-07_6

G Data
Adware.SwiftBrowse
14.7.24

MicroWorld eScan
Adware.SwiftBrowse.N
15.0.0.618

NANO AntiVirus
Riskware.Win32.Yotoon.ddghtt
0.28.2.61721

nProtect
Adware.SwiftBrowse.N
14.05.30.01

Reason Heuristics
PUP.AppBud.k
14.7.27.14

Sophos
OutoBox
4.98

Trend Micro House Call
TROJ_GEN.F47V0529
7.2.206

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Trojan.Win32.Generic
29784

Zillya! Antivirus
Adware.Yotoon.Win64.1
2.0.0.1900

File size:
51.6 KB (52,816 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\{fa53d675-4680-455e-ac21-6ef151942a45}w.sys

Digital Signature
Signed by:
App Bud

Authority:
DigiCert Inc

Valid from:
6/9/2014 5:30:00 AM

Valid to:
6/17/2015 5:30:00 PM

Subject:
CN=App Bud, O=App Bud, L=Santa Monica, S=California, C=US

Issuer:
CN=DigiCert Assured ID Code Signing CA-1, OU=www.digicert.com, O=DigiCert Inc, C=US

Serial number:
07591B091A65F99B8121AB657546815A

File PE Metadata
Compilation timestamp:
1/31/2014 6:15:28 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:nIsHpnKHCBSqUPJHKQpkJxpKwT2bcWiJmOtX3g2rp3lnRZVoMuC:IsHRKHLJqQpkYwTsiTtXxt/uC

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...
 
[+]

Entropy:
6.3319

Code size:
37 KB (37,888 bytes)

Driver
Display name:
{fa53d675-4680-455e-ac21-6ef151942a45}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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