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{19854aff-7c07-4859-9831-cd028ac55dd0}gw64.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}gw64.sys by PacFunction has been detected as adware by 23 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{19854aff-7c07-4859-9831-cd028ac55dd0}Gw64”. 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:
fc6ecef522d169d84614919a6ffded53

SHA-1:
0c69433ac446e8704512999c202d1a62d9696ffa

SHA-256:
3a76bfeabd513f5075d1eee58dd60908d5212a26f8e95cf265d40ccfd20253f8

Scanner detections:
23 / 68

Status:
Adware

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

Analysis date:
4/24/2024 8:25:34 AM 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
2014.11.18

avast!
Win32:BrowseFox-ET [PUP]
2014.9-160213

AVG
Pafun
2017.0.2834

Bitdefender
Adware.NetFilter.E
1.0.20.220

Bkav FE
W64.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Swiftbrowse-75
0.98/21411

Dr.Web
Trojan.BPlug.123
9.0.1.044

Emsisoft Anti-Malware
Adware.NetFilter
8.16.02.13.04

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

K7 AntiVirus
Trojan
13.203.15900

McAfee
Artemis!B5F362E5DE9B
5600.6490

MicroWorld eScan
Adware.NetFilter.E
17.0.0.132

NANO AntiVirus
Riskware.Win64.NetFilter.dfibaf
0.30.24.1357

nProtect
Adware.NetFilter.E
14.11.17.01

Reason Heuristics
PUP.Yontoo.PacFunction (M)
16.2.13.16

Sophos
BrowseSmart
4.98

Trend Micro House Call
TROJ_GEN.R0C1C0OJK14
7.2.44

VIPRE Antivirus
Trojan.Win32.Generic
34878

Zillya! Antivirus
Adware.Yotoon.Win64.13
2.0.0.2175

File size:
43.7 KB (44,736 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}gw64.sys

Digital Signature
Signed by:
PacFunction

Authority:
VeriSign, Inc.

Valid from:
1/8/2014 4:00:00 PM

Valid to:
1/9/2015 3:59:59 PM

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:
9/12/2014 4:33:02 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:XgLmaZF8aSQ7DwZmEhzg8ClFHeDrTdRfsQCa5075YLwidHI0il:Q5ZEQI8E7ClquaC759Eu

Entry address:
0xB064

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, C6, 60, FF, FF, CC, CC, 38, B2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, B6, 00, 00, 60, 81, 00, 00, 28, B1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, B9, 00, 00, 50, 80, 00, 00, D8, B0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, BA, 00, 00, 00, 80, 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, BA, 00, 00, 00, 00, 00, 00, 86, BA, 00, 00...
 
[+]

Entropy:
6.3741

Code size:
30.5 KB (31,232 bytes)

Driver
Display name:
{19854aff-7c07-4859-9831-cd028ac55dd0}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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