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{4d04d451-b8ea-4a87-becc-f81f49396472}w64.sys

Mokiray

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {4d04d451-b8ea-4a87-becc-f81f49396472}w64.sys by Mokiray has been detected as adware by 17 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{4d04d451-b8ea-4a87-becc-f81f49396472}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 Mokiray)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
4adb362b01d51ba745febef396550ae4

SHA-1:
92c705801d9d017ae16b7ee533b36739a8f07a79

SHA-256:
b46ae4e6f92dd4d5ead30679aa4382859e9165744f7ee7bd2c43f7c00ff73c49

Scanner detections:
17 / 68

Status:
Adware

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

Analysis date:
4/18/2024 3:40:16 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CH
734

Agnitum Outpost
Riskware.Agent
7.1.1

avast!
Win32:BrowseFox-EH [PUP]
2014.9-150201

AVG
Generic
2016.0.3212

Bitdefender
Adware.SwiftBrowse.CH
1.0.20.160

Clam AntiVirus
Win.Adware.Swiftbrowse-497
0.98/21511

Dr.Web
Tool.NetFilter.313
9.0.1.032

Emsisoft Anti-Malware
Adware.SwiftBrowse.CH
8.15.02.01.04

ESET NOD32
Win64/BrowseFox.CG (variant)
9.10802

F-Prot
W64/A-59c9c70a
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.CH
11.2015-01-02_1

G Data
Adware.SwiftBrowse.CH
15.2.24

MicroWorld eScan
Adware.SwiftBrowse.CH
16.0.0.96

nProtect
Adware.SwiftBrowse.CH
14.11.28.01

Reason Heuristics
PUP.Yontoo
15.2.1.4

VIPRE Antivirus
Trojan.Win32.Generic
35254

Zillya! Antivirus
Adware.Yotoon.Win64.14
2.0.0.1995

File size:
47.7 KB (48,824 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{4d04d451-b8ea-4a87-becc-f81f49396472}w64.sys

Digital Signature
Signed by:
Mokiray

Authority:
VeriSign, Inc.

Valid from:
1/22/2014 4:00:00 AM

Valid to:
1/23/2015 3:59:59 AM

Subject:
CN=Mokiray, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Mokiray, 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:
6190556C04EEBA4051F111670BD7D546

File PE Metadata
Compilation timestamp:
11/28/2014 11:34:58 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:lt7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD373t:fFID6EGnLA8AFJTNEVmD7t

Entry address:
0xC064

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, E2, 50, FF, FF, CC, CC, 78, C2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 54, C6, 00, 00, A0, 91, 00, 00, 28, C1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, DA, CA, 00, 00, 50, 90, 00, 00, D8, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, D2, CB, 00, 00, 00, 90, 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, B6, CB, 00, 00, 00, 00, 00, 00, A2, CB, 00, 00...
 
[+]

Entropy:
6.3925

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{4d04d451-b8ea-4a87-becc-f81f49396472}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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