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{c9295130-7674-4d8c-af48-518ea8f9a1b9}w64.sys

PacFunction

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {c9295130-7674-4d8c-af48-518ea8f9a1b9}w64.sys by PacFunction has been detected as adware by 25 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{c9295130-7674-4d8c-af48-518ea8f9a1b9}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 PacFunction)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
666ad8d9ae9cd4d71b0065f9b98dd698

SHA-1:
229157f238d1a85963cd72f9f65d69b07cc8ac8f

SHA-256:
53d5c001028b34ac5564e4ea710382b261f7c62120774c87d26a08ea31d7d079

Scanner detections:
25 / 68

Status:
Adware

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

Analysis date:
4/25/2024 1:40:21 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CH
358

Agnitum Outpost
Riskware.Agent
7.1.1

avast!
MSIL:BrowseFox-N [PUP]
2014.9-160212

AVG
Generic
2017.0.2836

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.16212

Bitdefender
Adware.SwiftBrowse.CH
1.0.20.215

Bkav FE
W64.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Swiftbrowse-497
0.98/20195

Dr.Web
Trojan.Yontoo.1778
9.0.1.043

Emsisoft Anti-Malware
Adware.SwiftBrowse.CH
8.16.02.12.08

ESET NOD32
Win64/BrowseFox (variant)
10.10542

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

F-Secure
Adware.SwiftBrowse.CH
11.2016-12-02_6

G Data
Adware.SwiftBrowse.CH
16.2.25

K7 AntiVirus
Adware
13.201.15277

McAfee
Trojan.Artemis!0FCED258DFA2
5600.6492

MicroWorld eScan
Adware.SwiftBrowse.CH
17.0.0.129

Norman
Adware.SwiftBrowse.CH
11.20160212

nProtect
Adware.SwiftBrowse.CH
15.03.16.01

Reason Heuristics
PUP.Yontoo.PacFunction (M)
16.2.12.8

SUPERAntiSpyware
Adware.BrowseFox/Variant
9328

Trend Micro House Call
HS_BROWSEFOX.SM
7.2.43

Trend Micro
HS_BROWSEFOX.SM
10.465.12

VIPRE Antivirus
Threat.4150696
37788

Zillya! Antivirus
Adware.Yotoon.Win64.14
2.0.0.2102

File size:
47.7 KB (48,832 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\{c9295130-7674-4d8c-af48-518ea8f9a1b9}w64.sys

Digital Signature
Signed by:
PacFunction

Authority:
VeriSign, Inc.

Valid from:
1/9/2014 5:30:00 AM

Valid to:
1/10/2015 5:29:59 AM

Subject:
CN=PacFunction, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=PacFunction, 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:
4DF47FADF68D2EB9B8A7923DCCC176FF

File PE Metadata
Compilation timestamp:
12/9/2014 11:57:38 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:lm7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD3b0TQ:EFID6EGnLA8AFJTNEVmDmQ

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:
6.3920

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{c9295130-7674-4d8c-af48-518ea8f9a1b9}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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