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{7f2b4ad0-671a-477b-bcd4-79d041f50d27}w.sys

BrowseSmart

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {7f2b4ad0-671a-477b-bcd4-79d041f50d27}w.sys by BrowseSmart has been detected as adware by 16 anti-malware scanners. It runs as a Windows kernel mode device driver named “{7f2b4ad0-671a-477b-bcd4-79d041f50d27}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 BrowseSmart)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
cd3e6254dc6f807719a15d35c0e8495f

SHA-1:
986dda3dcfcbaf32ca6640d356bbd56a4605b394

SHA-256:
bcf0e99f386c800cd83c2bd2885a9521997bb8c8dc103c55a538a032c92b1135

Scanner detections:
16 / 68

Status:
Adware

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

Analysis date:
4/25/2024 3:11:03 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.1227
7.11.177.204

AVG
BrowseSmart
2015.0.3316

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141019

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/21411

Dr.Web
hacktool program Tool.NetFilter.313
9.0.1.05190

ESET NOD32
Win64/BrowseFox.BY (variant)
8.10587

F-Prot
W32/A-248e95ab
v6.4.7.1.166

IKARUS anti.virus
AdWare.BrowseFox
t3scan.1.7.8.0

NANO AntiVirus
Riskware.Win32.NetFilter.dgkdox
0.28.2.62483

Reason Heuristics
PUP.BrowseSmart.k
14.10.19.19

Sophos
LemurLeap
4.98

Trend Micro House Call
TROJ_GEN.F47V0609
7.2.292

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Threat.4741131
33706

Zillya! Antivirus
Backdoor.CPEX.Win32.29350
2.0.0.1953

File size:
42.2 KB (43,200 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\{7f2b4ad0-671a-477b-bcd4-79d041f50d27}w.sys

Digital Signature
Signed by:
BrowseSmart

Authority:
VeriSign, Inc.

Valid from:
9/27/2013 1:00:00 AM

Valid to:
9/28/2015 12:59:59 AM

Subject:
CN=BrowseSmart, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=BrowseSmart, 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:
2324196045B471D3A6A37CF9331711AB

File PE Metadata
Compilation timestamp:
9/22/2014 8:01:51 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:HN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddnYl+:thUcpH/0+LCf7EziDHhd++

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:
6.6142

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{7f2b4ad0-671a-477b-bcd4-79d041f50d27}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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