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{09c3ffd6-f1a3-4fde-86e1-d448e8559c21}gt.sys

Girafarri

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {09c3ffd6-f1a3-4fde-86e1-d448e8559c21}gt.sys by Girafarri has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a Windows kernel mode device driver named “{09c3ffd6-f1a3-4fde-86e1-d448e8559c21}Gt”.
Publisher:
StdLib  (signed by Girafarri)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
946ae5529b1cd0f4323117a10210da38

SHA-1:
2e373b2b96f073b5a8a7af037eb861b44aa95fbd

SHA-256:
7ec4bb227a0c5e3d91feaf7b1dae75e3acb07073ac27e31b78f207da9b2730de

Scanner detections:
1 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
11/23/2024 10:34:01 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.2.7.6

File size:
54.6 KB (55,872 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Common path:
C:\Windows\System32\drivers\{09c3ffd6-f1a3-4fde-86e1-d448e8559c21}gt.sys

Digital Signature
Signed by:
Girafarri

Authority:
VeriSign, Inc.

Valid from:
4/22/2014 8:00:00 AM

Valid to:
4/23/2015 7:59:59 AM

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:
3/13/2015 7:08:16 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

Entry address:
0xA9BE

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 2A, E4, FF, FF, CC, CC, 34, AA, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 04, AE, 00, 00, 94, 93, 00, 00, 20, AA, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 3A, AE, 00, 00, 80, 93, 00, 00, 2C, AA, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 56, AE, 00, 00, 8C, 93, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 26, AE, 00, 00, 12, AE, 00, 00, 00, 00, 00, 00, 42, AE, 00, 00, 00, 00, 00, 00, 2C, AB, 00, 00, 44, AB, 00, 00, 56, AB...
 
[+]

Entropy:
6.3461

Code size:
37 KB (37,888 bytes)

Driver
Display name:
{09c3ffd6-f1a3-4fde-86e1-d448e8559c21}Gt

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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