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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:
1.4.4.6 built by: WinDDK

MD5:
5ebbf1288c83546a5a9405818991a8a5

SHA-1:
e2be927a5393f392245cd340457afda281bb61f1

SHA-256:
0df4ff2bfdb081d4b0460f67ae79cb0ca7cbc6b5a733ae499206103051040c9b

Scanner detections:
30 / 68

Status:
Adware

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

Analysis date:
4/25/2024 6:41:37 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
366

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]
2014.9-160203

AVG
Generic
2017.0.2844

Baidu Antivirus
Adware.Win64.BrowseFox
4.0.3.1623

Bitdefender
Adware.BrowseFox.V
1.0.20.170

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
9.0.1.034

Emsisoft Anti-Malware
Adware.BrowseFox.V
8.16.02.03.05

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
11.2016-03-02_4

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
5600.6500

MicroWorld eScan
Adware.BrowseFox.V
17.0.0.102

NANO AntiVirus
Riskware.Win32.Yotoon.dfewso
0.28.2.62151

Norman
Adware.BrowseFox.V
11.20160203

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)
16.2.3.17

Trend Micro House Call
Suspicious_GEN.F47V0627
7.2.34

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:
42.2 KB (43,192 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\{ef8714df-a44b-464c-9034-549a70dc4cd7}w.sys

Digital Signature
Signed by:
maucampo

Authority:
VeriSign, Inc.

Valid from:
11/27/2013 2:00:00 AM

Valid to:
11/28/2014 1:59:59 AM

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:
9/22/2014 10:01:51 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:VN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddLa:3hUcpH/0+LCf7EziDHhdM

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...
 
[+]

Code size:
28 KB (28,672 bytes)

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

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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