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{8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64.sys

Yula

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64.sys by Yula has been detected as adware by 25 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{8de5503e-af48-42eb-89b0-fcff5cbc3f8d}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 Yula)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
79a7de6d8f3e3c9781d219986dbe69f5

SHA-1:
5c2a74d75c25ed5c196e25270b0e7865eca6b9f6

SHA-256:
25fa9ffb93a121fe117ef8dfb787904fb1c8aa537183d8b1c71392718ff8c73d

Scanner detections:
25 / 68

Status:
Adware

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

Analysis date:
4/26/2024 6:36:38 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.NetFilter.C
356

Agnitum Outpost
Riskware.Agent
7.1.1

AhnLab V3 Security
Win-PUP/BrowseFox.Gen
2015.07.13

avast!
Win32:BrowseFox-FF [PUP]
2014.9-160214

AVG
AdPlugin
2017.0.2834

Bitdefender
Adware.NetFilter.C
1.0.20.225

Bkav FE
W64.HfsAdware
1.3.0.6979

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

Dr.Web
Trojan.Yontoo.1734
9.0.1.045

Emsisoft Anti-Malware
Adware.NetFilter
8.16.02.14.09

ESET NOD32
Win64/BrowseFox.BH (variant)
10.10821

Fortinet FortiGate
Adware/BrowseFox
2/14/2016

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

F-Secure
Adware.NetFilter.C
11.2016-14-02_1

G Data
Adware.NetFilter
16.2.25

K7 AntiVirus
Adware
13.205.16534

McAfee
Artemis!BFC1A18B72CC
5600.6490

MicroWorld eScan
Adware.NetFilter.C
17.0.0.135

NANO AntiVirus
Riskware.Win64.NetFilter.djptee
0.28.6.64267

Norman
Adware.NetFilter.C
11.20160214

nProtect
Adware.NetFilter.C
15.07.10.01

Reason Heuristics
PUP.Yontoo.Yula (M)
16.2.14.9

SUPERAntiSpyware
Adware.BrowseFox/Variant
9324

VIPRE Antivirus
Trojan.Win32.Generic
41942

Zillya! Antivirus
Adware.Yotoon.Win64.14
2.0.0.2283

File size:
47.7 KB (48,816 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\{8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64.sys

Digital Signature
Signed by:
Yula

Authority:
VeriSign, Inc.

Valid from:
3/14/2014 7:00:00 PM

Valid to:
3/15/2015 6:59:59 PM

Subject:
CN=Yula, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Yula, 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:
4B2C13D47B877663487D003C021E7110

File PE Metadata
Compilation timestamp:
1/7/2015 10:47:03 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:lW7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD3qehcR:sFID6EGnLA8AFJTNEVmDdhc

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:
6.3928

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{8de5503e-af48-42eb-89b0-fcff5cbc3f8d}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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