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{4a1ea04b-0e0d-426d-8775-2d82a1b8bb52}w64.sys

tanzuki

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {4a1ea04b-0e0d-426d-8775-2d82a1b8bb52}w64.sys by tanzuki has been detected as adware by 18 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{4a1ea04b-0e0d-426d-8775-2d82a1b8bb52}w64”. 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 tanzuki)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
29d47096cb4fa2225ea315e6767bf329

SHA-1:
2b5d158ff1b525cb626bf60988bfcc07359b2106

SHA-256:
cc981ca647ed79371dbfce032cbcdb135d62c570e4d2ac82638ca0f1e549fe7d

Scanner detections:
18 / 68

Status:
Adware

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

Analysis date:
4/27/2024 4:14:23 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.NetFilter.E
800

Agnitum Outpost
Trojan.BPlug
7.1.1

AhnLab V3 Security
Trojan/Win64.SwiftBrowse
2014.11.27

AVG
Generic
2015.0.3278

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141127

Bitdefender
Adware.NetFilter.E
1.0.20.1655

Clam AntiVirus
Win.Adware.Swiftbrowse-75
0.98/21511

Dr.Web
Trojan.BPlug.123
9.0.1.05190

Emsisoft Anti-Malware
Adware.NetFilter
9.0.0.4570

F-Prot
W64/A-e967bae2
v6.4.7.1.166

F-Secure
Adware.NetFilter.E
11.2014-27-11_5

G Data
Adware.NetFilter
14.11.24

MicroWorld eScan
Adware.NetFilter.E
15.0.0.993

nProtect
Adware.NetFilter.E
14.11.27.01

Reason Heuristics
PUP.tanzuki.m
14.11.27.4

Sophos
BrowseSmart
4.98

VIPRE Antivirus
Threat.4150696
35088

Zillya! Antivirus
Adware.Yotoon.Win64.3
2.0.0.1994

File size:
59.7 KB (61,112 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{4a1ea04b-0e0d-426d-8775-2d82a1b8bb52}w64.sys

Digital Signature
Signed by:
tanzuki

Authority:
VeriSign, Inc.

Valid from:
8/21/2013 1:00:00 AM

Valid to:
8/21/2015 12:59:59 AM

Subject:
CN=tanzuki, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=tanzuki, 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:
5094CECD4B5D21903C384E60AC45C6C4

File PE Metadata
Compilation timestamp:
1/31/2014 12:45:30 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:Uot2dxF9O8ZF33iqiIy938bWp9XcfBvJkowidI32:U9JRicy938ip9ea1jG

Entry address:
0xF064

Entry point:
48, 83, EC, 28, 4C, 8B, C2, 4C, 8B, C9, E8, 95, FF, FF, FF, 49, 8B, D0, 49, 8B, C9, 48, 83, C4, 28, E9, 2E, 20, FF, FF, CC, CC, 38, F2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, F6, 00, 00, 60, C1, 00, 00, 28, F1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, F9, 00, 00, 50, C0, 00, 00, D8, F0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, FA, 00, 00, 00, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 9A, FA, 00, 00, 00, 00, 00, 00, 86, FA, 00, 00...
 
[+]

Entropy:
5.9637

Code size:
46.5 KB (47,616 bytes)

Driver
Display name:
{4a1ea04b-0e0d-426d-8775-2d82a1b8bb52}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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