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{9d525140-2aa5-4c29-b571-058468248f69}gt64.sys

Girafarri

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {9d525140-2aa5-4c29-b571-058468248f69}gt64.sys by Girafarri has been detected as adware by 12 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{9d525140-2aa5-4c29-b571-058468248f69}Gt64”. 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 Girafarri)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
e7a36ea595494e4a2d5636c786df23d0

SHA-1:
8a29d543ccabace52453768c91aa2d810b0ebb60

SHA-256:
287dc7f214fa5add3c053a014d29d2da6e9ca3b1848e99765417fecc961a1563

Scanner detections:
12 / 68

Status:
Adware

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

Analysis date:
4/25/2024 9:46:58 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.SwiftBrowse
7.1.1

avast!
Win32:BrowseFox-GZ [PUP]
150101-1

AVG
Generic
2016.0.3179

Clam AntiVirus
Win.Adware.Netfilter-183
0.98/21411

ESET NOD32
Win64/BrowseFox (variant)
9.10687

F-Prot
W64/A-7883d091
v6.4.7.1.166

herdProtect (fuzzy)
variant of {11e16680-3a18-4ccb-8425-310994e50764}t64.sys (Adware)
2015.6.12.16

IKARUS anti.virus
PUA.BrowseFox
t3scan.1.8.3.0

Reason Heuristics
PUP.Yontoo
15.3.6.1

Sophos
Browse Fox
4.98

VIPRE Antivirus
Threat.4150696
34232

Zillya! Antivirus
Adware.Yotoon.Win32.143
2.0.0.2089

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\{9d525140-2aa5-4c29-b571-058468248f69}gt64.sys

Digital Signature
Signed by:
Girafarri

Authority:
VeriSign, Inc.

Valid from:
4/21/2014 8:00:00 PM

Valid to:
4/22/2015 7:59:59 PM

Subject:
CN=Girafarri, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Girafarri, 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:
2FB197284297D52000599AA2F7D0668F

File PE Metadata
Compilation timestamp:
2/22/2015 7:31:57 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
1536:mfjq7nqsXk7cfk20kQo9tSRw2wdTlwzHptJTqVC:4j4qsXk78UkdQw2wdpwzHpzTqk

Entry address:
0x11064

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, AA, A7, FF, FF, CC, CC, D0, 10, 01, 00, 00, 00, 00, 00, 00, 00, 00, 00, 38, 15, 01, 00, 10, D0, 00, 00, C0, 10, 01, 00, 00, 00, 00, 00, 00, 00, 00, 00, 5A, 15, 01, 00, 00, D0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 46, 15, 01, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 34, 12, 01, 00, 00, 00, 00, 00, 48, 12, 01, 00, 00, 00, 00, 00, 66, 12, 01, 00...
 
[+]

Entropy:
6.3835

Code size:
46 KB (47,104 bytes)

Driver
Display name:
{9d525140-2aa5-4c29-b571-058468248f69}Gt64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


herdProtect is a second line of defense malware removal platform powered by 68 anti-malware engines in the cloud. Since no single anti-malware program is perfect 100% of the time, herdProtect utilizes a 'herd' of multiple engines to guarantee the widest coverage and the earliest possible detection.