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{fed5e6b2-4fc4-43ba-8e95-001d959d8008}t.sys

Whilokii

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {fed5e6b2-4fc4-43ba-8e95-001d959d8008}t.sys by Whilokii has been detected as adware by 4 anti-malware scanners. It runs as a Windows kernel mode device driver named “{fed5e6b2-4fc4-43ba-8e95-001d959d8008}t”. 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 Whilokii)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
41da309adc8b9c3d4ddb5041a7f67788

SHA-1:
801f01de60f5e380f24e7f0e51b764759247f54b

SHA-256:
9793b59382c2c64c48383cc3c7e31b2cc38535f424277f3b7a482e45f89e00f5

Scanner detections:
4 / 68

Status:
Adware

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

Analysis date:
4/18/2024 2:30:19 PM UTC  (today)

Scan engine
Detection
Engine version

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.14724

IKARUS anti.virus
AdWare.SwiftBrowse
t3scan.1.6.1.0

Reason Heuristics
PUP.Whilokii.k
14.8.7.21

VIPRE Antivirus
Threat.4150696
31208

File size:
53.9 KB (55,224 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{fed5e6b2-4fc4-43ba-8e95-001d959d8008}t.sys

Digital Signature
Signed by:
Whilokii

Authority:
VeriSign, Inc.

Valid from:
9/19/2013 10:00:00 AM

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

Subject:
CN=Whilokii, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Whilokii, 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:
5D49818D94FEA0AEA7D9B885C9BACBD7

File PE Metadata
Compilation timestamp:
1/31/2014 11:46:38 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:V1bP7EDNtMTw/RWDjR/McKV5qEXGBJgxgZ+4AOmvtnBU6+RR8A0:LP7EJSTukuzTrGYs+JNBUtRc

Entry address:
0xA73E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, CA, E3, FF, FF, CC, CC, B4, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 84, AB, 00, 00, 94, 90, 00, 00, A0, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BA, AB, 00, 00, 80, 90, 00, 00, AC, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, D6, AB, 00, 00, 8C, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A6, AB, 00, 00, 92, AB, 00, 00, 00, 00, 00, 00, C2, AB, 00, 00, 00, 00, 00, 00, AC, A8, 00, 00, C4, A8, 00, 00, D6, A8...
 
[+]

Entropy:
6.3484

Code size:
36.3 KB (37,120 bytes)

Driver
Display name:
{fed5e6b2-4fc4-43ba-8e95-001d959d8008}t

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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