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{31a2f244-4a67-4367-b593-df9513aea360}gt.sys

PortalMore

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {31a2f244-4a67-4367-b593-df9513aea360}gt.sys by PortalMore has been detected as adware by 28 anti-malware scanners. It runs as a Windows kernel mode device driver named “{31a2f244-4a67-4367-b593-df9513aea360}Gt”. 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 PortalMore)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
7755d4688d7170a856186d33e823dc36

SHA-1:
cc2dfe8e75214e34a97d2407f9f9214c2ccfb72c

SHA-256:
3b11626a804cbc7fec8696a96f4c93c087d318b8b0e3a087f9fbadfd7861fe7b

Scanner detections:
28 / 68

Status:
Adware

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

Analysis date:
4/24/2024 12:51:33 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.NetFilter.J
741

Agnitum Outpost
PUA.Yotoon
7.1.1

AhnLab V3 Security
Win-PUP/BrowseFox.Gen
2015.01.13

Avira AntiVirus
Adware/BrowseFox.A.282
7.11.176.190

avast!
Win32:BrowseFox-FW [PUP]
2014.9-150125

AVG
Generic
2016.0.3219

Baidu Antivirus
Adware.Win64.BrowseFox
4.0.3.15125

Bitdefender
Adware.NetFilter.J
1.0.20.125

Clam AntiVirus
Win.Adware.Agent-12778
0.98/21411

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
20683

Dr.Web
Trojan.BPlug.117
9.0.1.025

Emsisoft Anti-Malware
Adware.NetFilter
8.15.01.25.02

ESET NOD32
Win64/BrowseFox.AJ potentially unwanted application
9.7.0.302.0

F-Prot
W32/A-b3b70cb0
v6.4.7.1.166

F-Secure
Adware.NetFilter.J
11.2015-25-01_1

G Data
Adware.NetFilter
15.1.24

IKARUS anti.virus
PUA.RiskWare.NetFilter
t3scan.1.7.8.0

McAfee
Artemis!81DFA59F5F32
5600.6875

MicroWorld eScan
Adware.NetFilter.J
16.0.0.75

NANO AntiVirus
Riskware.Win32.Yotoon.denstu
0.28.2.62440

Norman
Adware.NetFilter.J
11.20150125

nProtect
Adware.NetFilter.J
15.01.12.01

Qihoo 360 Security
Win32/Virus.Adware.720
1.0.0.1015

Reason Heuristics
PUP.Yontoo
15.1.25.2

Trend Micro House Call
Suspicious_GEN.F47V0812
7.2.25

Vba32 AntiVirus
AdWare.Yotoon
3.12.26.3

VIPRE Antivirus
Yontoo
33702

Zillya! Antivirus
Adware.Yotoon.Win64.6
2.0.0.1944

File size:
53.7 KB (55,000 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{31a2f244-4a67-4367-b593-df9513aea360}gt.sys

Digital Signature
Signed by:
PortalMore

Authority:
DigiCert Inc

Valid from:
6/9/2014 2:00:00 AM

Valid to:
6/17/2015 2:00:00 PM

Subject:
CN=PortalMore, O=PortalMore, L=Santa Monica, S=California, C=US

Issuer:
CN=DigiCert Assured ID Code Signing CA-1, OU=www.digicert.com, O=DigiCert Inc, C=US

Serial number:
0EBE0142555C3B0E57555883DE1E0967

File PE Metadata
Compilation timestamp:
8/7/2014 1:52:31 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:AOnnE+ZwNszUTw/RqzGojR/h3cKG45q30XGBUuJ0xEkMHd8OagKmvz11/6RRRfUU:TnERxTukHzTrGCuGOVh1/yRFj

Entry address:
0xA6BE

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 4A, E4, FF, FF, CC, CC, 34, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 04, AB, 00, 00, 94, 90, 00, 00, 20, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 3A, AB, 00, 00, 80, 90, 00, 00, 2C, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 56, AB, 00, 00, 8C, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 26, AB, 00, 00, 12, AB, 00, 00, 00, 00, 00, 00, 42, AB, 00, 00, 00, 00, 00, 00, 2C, A8, 00, 00, 44, A8, 00, 00, 56, A8...
 
[+]

Code size:
36.3 KB (37,120 bytes)

Driver
Display name:
{31a2f244-4a67-4367-b593-df9513aea360}Gt

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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