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{85c74733-05ab-4712-b709-690a78b239f8}gt64.sys

ResultsBay

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {85c74733-05ab-4712-b709-690a78b239f8}gt64.sys by ResultsBay 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 64-bit kernel mode device driver named “{85c74733-05ab-4712-b709-690a78b239f8}Gt64”.
Publisher:
StdLib  (signed by ResultsBay)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
ec35da0e43c658d766c09349462aa9e1

SHA-1:
4a0ef43a2129478c0b4fb8475b9e64ac0c465d4b

SHA-256:
ed9f7ec87cec52c9e9e0e9ea81643f8a5ec73c0e3ed167ce6fa17fbf8d1a7e9a

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:
5/8/2024 3:37:03 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.7.12

File size:
59.6 KB (61,072 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\{85c74733-05ab-4712-b709-690a78b239f8}gt64.sys

Digital Signature
Signed by:
ResultsBay

Authority:
VeriSign, Inc.

Valid from:
12/22/2014 6:00:00 PM

Valid to:
2/21/2016 5:59:59 PM

Subject:
CN=ResultsBay, O=ResultsBay, 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:
18EAD40F72036906D9046AAC85FD508C

File PE Metadata
Compilation timestamp:
2/2/2015 6:45:04 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

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:
6.3831

Code size:
46 KB (47,104 bytes)

Driver
Display name:
{85c74733-05ab-4712-b709-690a78b239f8}Gt64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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