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{fc8decf5-c269-4b18-87f1-c395dfcbd88f}w.sys

Source App

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {fc8decf5-c269-4b18-87f1-c395dfcbd88f}w.sys by Source App has been detected as adware by 20 anti-malware scanners. It runs as a Windows kernel mode device driver named “{fc8decf5-c269-4b18-87f1-c395dfcbd88f}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 Source App)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
23b38b2ea0a30d84c666da741ae3cca8

SHA-1:
6d903c685757a6b1cedbedfe5bdca372fff3b545

SHA-256:
7d6cccb8f8438cfc9759292add6b7392796c4fd5150797d4ee4b2b314ed2cceb

Scanner detections:
20 / 68

Status:
Adware

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

Analysis date:
4/26/2024 1:30:00 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
735

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.200.92

AVG
Generic
2016.0.3213

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.15131

Bitdefender
Adware.BrowseFox.V
1.0.20.155

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

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20652

Emsisoft Anti-Malware
Adware.BrowseFox.V
8.15.01.31.07

F-Prot
W32/S-a7161e1c
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
11.2015-31-01_7

G Data
Adware.BrowseFox
15.1.24

Kaspersky
not-a-virus:AdWare.Win32.Yotoon
14.0.0.2558

MicroWorld eScan
Adware.BrowseFox.V
16.0.0.93

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.30.0.64448

nProtect
Adware.BrowseFox.V
15.01.09.01

Reason Heuristics
PUP.Yontoo
15.1.31.7

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Trojan.Win32.Generic
36502

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.2029

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)

Common path:
C:\Windows\System32\drivers\{fc8decf5-c269-4b18-87f1-c395dfcbd88f}w.sys

Digital Signature
Signed by:
Source App

Authority:
VeriSign, Inc.

Valid from:
10/16/2014 3:00:00 AM

Valid to:
10/17/2015 2:59:59 AM

Subject:
CN=Source App, O=Source App, 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:
5436973D688F7AF7E3F875CD8B463EDD

File PE Metadata
Compilation timestamp:
1/8/2015 8:36:28 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:WN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddA/Ie:ahUcpH/0+LCf7EziDHhdgIe

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:
6.6138

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{fc8decf5-c269-4b18-87f1-c395dfcbd88f}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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