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{f2944598-b89f-4e10-b544-5173761572df}w.sys

Ace Race

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {f2944598-b89f-4e10-b544-5173761572df}w.sys by Ace Race has been detected as adware by 26 anti-malware scanners. It runs as a Windows kernel mode device driver named “{f2944598-b89f-4e10-b544-5173761572df}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 Ace Race)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
973767f9f841db608ba5093293d27e04

SHA-1:
5b2fbf4ab3f6aed8167e8bd15ae4b5ded9654e8c

SHA-256:
c6a062396a93714c198de3f280d6055133c10b01df4f9d768a8e9211beb5f8ca

Scanner detections:
26 / 68

Status:
Adware

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

Analysis date:
4/26/2024 7:18:24 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
551

Agnitum Outpost
PUA.BrowseFox
7.1.1

AhnLab V3 Security
Win-PUP/BrowseFox.Gen
2015.01.30

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.205.220

AVG
Generic
2016.0.3029

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.1583

Bitdefender
Adware.BrowseFox.V
1.0.20.1075

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/20296

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20890

Dr.Web
Trojan.Yontoo.1742
9.0.1.0215

Emsisoft Anti-Malware
Adware.BrowseFox.V
8.15.08.03.05

ESET NOD32
Win32/NetFilter.A potentially unsafe application
9.7.0.302.0

F-Prot
W32/S-a7161e1c
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
11.2015-03-08_2

G Data
Adware.BrowseFox
15.8.25

herdProtect (fuzzy)
variant of {4b1f8235-df79-4cc2-9ff4-ac6c20154eb5}gw.sys (Adware)
2015.9.8.1

K7 AntiVirus
Unwanted-Program
13.193.14803

MicroWorld eScan
Adware.BrowseFox.V
16.0.0.645

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.30.0.65070

Norman
Adware.BrowseFox.V
11.20150908

nProtect
Adware.BrowseFox.V
15.04.07.01

Reason Heuristics
PUP.Yontoo.AceRace (M)
15.8.3.5

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Threat.4150696
38882

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\{f2944598-b89f-4e10-b544-5173761572df}w.sys

Digital Signature
Signed by:
Ace Race

Authority:
VeriSign, Inc.

Valid from:
10/7/2014 5:00:00 AM

Valid to:
10/8/2015 4:59:59 AM

Subject:
CN=Ace Race, O=Ace Race, 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:
47DF877938071D6194F321723076892E

File PE Metadata
Compilation timestamp:
1/29/2015 11:34:18 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:DN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddhuX:JhUcpH/0+LCf7EziDHhdQ

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...
 
[+]

Entropy:
6.6139

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{f2944598-b89f-4e10-b544-5173761572df}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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