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{91975f83-f39c-43cf-aad4-0b3396b0f6db}w64.sys

Knowledge Gains

The file {91975f83-f39c-43cf-aad4-0b3396b0f6db}w64.sys by Knowledge Gains has been detected as a potentially unwanted program 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 “{91975f83-f39c-43cf-aad4-0b3396b0f6db}w64”.
Publisher:
StdLib  (signed by Knowledge Gains)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
13b9c2cd4cb054153a60da893d0e3444

SHA-1:
57c0ae6fb0210ab9c83b144b0c3d4ad759aa8c03

SHA-256:
04e885d502e733c240069d0e48239bd91ff70ce8759790ef6e19eaaedf78341b

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
2/25/2025 10:41:33 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.13.0

File size:
47.6 KB (48,792 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{91975f83-f39c-43cf-aad4-0b3396b0f6db}w64.sys

Digital Signature
Signed by:
Knowledge Gains

Authority:
VeriSign, Inc.

Valid from:
1/15/2015 1:00:00 AM

Valid to:
1/16/2016 12:59:59 AM

Subject:
CN=Knowledge Gains, O=Knowledge Gains, 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:
41A7E1BB4081A36A8282DCAE1B2A3A14

File PE Metadata
Compilation timestamp:
9/5/2015 10:41:00 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

Entry address:
0xC064

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, E2, 50, FF, FF, CC, CC, 78, C2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 54, C6, 00, 00, A0, 91, 00, 00, 28, C1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, DA, CA, 00, 00, 50, 90, 00, 00, D8, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, D2, CB, 00, 00, 00, 90, 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, B6, CB, 00, 00, 00, 00, 00, 00, A2, CB, 00, 00...
 
[+]

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{91975f83-f39c-43cf-aad4-0b3396b0f6db}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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