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{d4fb2107-4e6c-4a65-b0f5-921b8c8a7cfb}gw64.sys

Jotzey

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {d4fb2107-4e6c-4a65-b0f5-921b8c8a7cfb}gw64.sys by Jotzey 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 “{d4fb2107-4e6c-4a65-b0f5-921b8c8a7cfb}Gw64”.
Publisher:
StdLib  (signed by Jotzey)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
76856023beaa76f33f4f80e052e1966e

SHA-1:
dd1ba5a8365280efea4a6974abe6c6ea87f902f3

SHA-256:
e58ebe524137c847557129ed80eb9e8117f3d0ee83da63a17e413594369c5d0e

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:
5/3/2024 10:13:49 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.14.23

File size:
47.6 KB (48,776 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\{d4fb2107-4e6c-4a65-b0f5-921b8c8a7cfb}gw64.sys

Digital Signature
Signed by:
Jotzey

Authority:
VeriSign, Inc.

Valid from:
1/5/2015 2:00:00 AM

Valid to:
2/5/2016 1:59:59 AM

Subject:
CN=Jotzey, O=Jotzey, 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:
5EFD1F15DC4026F27F7176D692841FED

File PE Metadata
Compilation timestamp:
1/27/2016 7:20:03 PM

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...
 
[+]

Entropy:
6.3929

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{d4fb2107-4e6c-4a65-b0f5-921b8c8a7cfb}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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