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{ef8714df-a44b-464c-9034-549a70dc4cd7}w.sys

maucampo

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {ef8714df-a44b-464c-9034-549a70dc4cd7}w.sys by maucampo has been detected as adware by 30 anti-malware scanners. It runs as a Windows kernel mode device driver named “{ef8714df-a44b-464c-9034-549a70dc4cd7}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 maucampo)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
639dd47509d4b8d432de55ef3f83768b

SHA-1:
cfc91873d8be55668b203ad93a4e18ac2ff49b39

SHA-256:
6656bdadef30ca3ecdd4546d47288148985f9803c55ba4fa67f144668ff20764

Scanner detections:
30 / 68

Status:
Adware

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

Analysis date:
4/18/2024 11:07:17 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
361

Agnitum Outpost
RiskWare.NetFilter
7.1.1

AhnLab V3 Security
PUP/Win32.BrowseFox
2014.09.22

Avira AntiVirus
Adware/BrowseFox.A.168
7.11.173.140

avast!
Win32:BrowseFox-GF [PUP]
2014.9-160208

AVG
Generic
2017.0.2839

Baidu Antivirus
Adware.Win64.BrowseFox
4.0.3.1628

Bitdefender
Adware.BrowseFox.V
1.0.20.195

Bkav FE
W32.HfsAdware
1.3.0.6379

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

Comodo Security
Application.Win32.RiskWare.NetFilter.D
19584

Dr.Web
Trojan.Yontoo.1741
9.0.1.039

Emsisoft Anti-Malware
Adware.BrowseFox.V
8.16.02.08.10

ESET NOD32
Win64/BrowseFox.AJ potentially unwanted application
10.7.0.302.0

F-Prot
W32/A-0937c3f0
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
11.2016-08-02_2

G Data
Adware.BrowseFox
16.2.24

IKARUS anti.virus
AdWare.SwiftBrowse
t3scan.1.7.5.0

K7 AntiVirus
Unwanted-Program
13.193.14818

McAfee
Artemis!6AB10E606D64
5600.6495

MicroWorld eScan
Adware.BrowseFox.V
17.0.0.117

NANO AntiVirus
Riskware.Win32.Yotoon.dfewso
0.28.2.62151

Norman
Adware.BrowseFox.V
11.20160208

nProtect
Adware.BrowseFox.V
14.11.21.01

Qihoo 360 Security
Win32/Virus.Adware.c12
1.0.0.1015

Reason Heuristics
PUP.Yontoo.maucampo (M)
16.2.8.22

Trend Micro House Call
Suspicious_GEN.F47V0627
7.2.39

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Yontoo
33416

Zillya! Antivirus
Adware.Yotoon.Win64.8
2.0.0.1933

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\{ef8714df-a44b-464c-9034-549a70dc4cd7}w.sys

Digital Signature
Signed by:
maucampo

Authority:
VeriSign, Inc.

Valid from:
11/26/2013 7:00:00 PM

Valid to:
11/27/2014 6:59:59 PM

Subject:
CN=maucampo, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=maucampo, 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:
40BF170484E09DB904849DB86C86A494

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

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:pIsHpnKnCBSqUPJHKQpkJvRpvqIT2bcWiJmOt13g2rp3lne5t:msHRKnLJqQpkIITsiTt1xtW

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:
{ef8714df-a44b-464c-9034-549a70dc4cd7}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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