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{19854aff-7c07-4859-9831-cd028ac55dd0}w64.sys

PacFunction

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {19854aff-7c07-4859-9831-cd028ac55dd0}w64.sys by PacFunction has been detected as adware by 26 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{19854aff-7c07-4859-9831-cd028ac55dd0}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:
1.4.3.1 built by: WinDDK

MD5:
857462db10d8621154470b938ba81584

SHA-1:
2b3ff4fab6f74e72dab1ab7f64f94d7cdaf2345e

SHA-256:
07f93f9eed36a57b7eb3ec49bbe80ac7698f479b66f3df5a3ef61ac97e261205

Scanner detections:
26 / 68

Status:
Adware

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

Analysis date:
4/25/2024 2:10:29 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.NetFilter.E
356

Agnitum Outpost
Trojan.BPlug
7.1.1

AhnLab V3 Security
Trojan/Win64.SwiftBrowse
2015.01.09

avast!
Win64:Malware-gen
2014.9-160213

AVG
Pafun
2017.0.2834

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.16213

Bitdefender
Adware.NetFilter.E
1.0.20.220

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

Comodo Security
UnclassifiedMalware
18740

Dr.Web
Trojan.BPlug.123
9.0.1.044

Emsisoft Anti-Malware
Adware.NetFilter
8.16.02.13.02

ESET NOD32
Win64/Riskware.NetFilter.F application
10.7.0.302.0

F-Prot
W64/A-e967bae2
v6.4.7.1.166

F-Secure
Adware.NetFilter.E
11.2016-13-02_7

G Data
Adware.NetFilter
16.2.24

IKARUS anti.virus
AdWare.SpadeCast
t3scan.1.6.1.0

Malwarebytes
PUP.Optional.NetFilter
v2016.02.13.02

McAfee
Artemis!2EFBEE200F8A
5600.6490

MicroWorld eScan
Adware.NetFilter.E
17.0.0.132

nProtect
Adware.NetFilter.E
15.01.08.01

Qihoo 360 Security
Win32/Trojan.RiskWare.a25
1.0.0.1015

Reason Heuristics
PUP.Yontoo.PacFunction (M)
16.2.13.14

Sophos
BrowseSmart
4.98

Trend Micro House Call
TROJ_GEN.F47V0523
7.2.44

VIPRE Antivirus
Trojan.Win32.Generic
36474

Zillya! Antivirus
Adware.Yotoon.Win64.3
2.0.0.2028

File size:
59.7 KB (61,120 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\{19854aff-7c07-4859-9831-cd028ac55dd0}w64.sys

Digital Signature
Signed by:
PacFunction

Authority:
VeriSign, Inc.

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

Valid to:
1/10/2015 12:59:59 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:
1/31/2014 1:45:30 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:got2dxF9O8ZF33iqiIy938bWp9XcfBvJkowidIP06C:g9JRicy938ip9ea1j6

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...
 
[+]

Code size:
46.5 KB (47,616 bytes)

Driver
Display name:
{19854aff-7c07-4859-9831-cd028ac55dd0}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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