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{f551efce-3692-4ed5-8201-c1c7dbef1744}w64.sys

GreyGray

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {f551efce-3692-4ed5-8201-c1c7dbef1744}w64.sys by GreyGray has been detected as adware by 7 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{f551efce-3692-4ed5-8201-c1c7dbef1744}w64”. 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 GreyGray)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
1df3a309103d16957a556e6fca2dabed

SHA-1:
389bfc59d3b40a334d471cd400467646fabf2a16

SHA-256:
f8460e42ace09201c52ed1f75e1ee87fa50e83d6a8bcc872e2515af05b85a447

Scanner detections:
7 / 68

Status:
Adware

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

Analysis date:
12/25/2024 2:12:05 PM UTC  (today)

Scan engine
Detection
Engine version

AVG
GreyGray
2015.0.3436

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.14621

IKARUS anti.virus
AdWare.SpadeCast
t3scan.1.6.1.0

Reason Heuristics
PUP.GreyGray.m
14.8.7.20

Sophos
BrowseSmart
4.98

Trend Micro House Call
TROJ_GEN.F47V0606
7.2.172

VIPRE Antivirus
Threat.4150696
29708

File size:
59.7 KB (61,112 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\{f551efce-3692-4ed5-8201-c1c7dbef1744}w64.sys

Digital Signature
Signed by:
GreyGray

Authority:
VeriSign, Inc.

Valid from:
9/19/2013 1:00:00 AM

Valid to:
9/20/2015 12:59:59 AM

Subject:
CN=GreyGray, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=GreyGray, 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:
23FF62A16C638B371A4AB98A8F876E8B

File PE Metadata
Compilation timestamp:
1/31/2014 12:45:30 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:aot2dxF9O8ZF33iqiIy938bWp9XcfBvJkowidIrLMHIW:a9JRicy938ip9ea1jP8d

Entry address:
0xF064

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, 2E, 20, FF, FF, CC, CC, 38, F2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, F6, 00, 00, 60, C1, 00, 00, 28, F1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, F9, 00, 00, 50, C0, 00, 00, D8, F0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, FA, 00, 00, 00, C0, 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, 9A, FA, 00, 00, 00, 00, 00, 00, 86, FA, 00, 00...
 
[+]

Entropy:
5.9628

Code size:
46.5 KB (47,616 bytes)

Driver
Display name:
{f551efce-3692-4ed5-8201-c1c7dbef1744}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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