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{19854aff-7c07-4859-9831-cd028ac55dd0}t.sys

PacFunction

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {19854aff-7c07-4859-9831-cd028ac55dd0}t.sys by PacFunction has been detected as adware by 16 anti-malware scanners. It runs as a Windows kernel mode device driver named “{19854aff-7c07-4859-9831-cd028ac55dd0}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 PacFunction)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
2b50c90319ba5a640523d1e6e5de4f76

SHA-1:
f2730c447b159acd84bcafb3ff27dd381bb29a04

SHA-256:
7fe3cfddecf0e35c7fe6e2ecf99fc04eec7ba3e8bb49908f9612ef140e314c09

Scanner detections:
16 / 68

Status:
Adware

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

Analysis date:
4/25/2024 6:10:21 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.Yotoon
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.282
7.11.181.44

AVG
Pafun
2015.0.3304

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141031

Clam AntiVirus
Win.Adware.Agent-12778
0.98/21411

Dr.Web
Trojan.BPlug.117
9.0.1.0304

F-Prot
W32/A-caf5c463
v6.4.7.1.166

IKARUS anti.virus
AdWare.SwiftBrowse
t3scan.1.6.1.0

McAfee
Artemis!2B50C90319BA
5600.6960

NANO AntiVirus
Trojan.Win32.BPlug.dcxxfx
0.28.2.61148

Reason Heuristics
PUP.PacFunction.k
14.10.31.20

Sophos
Lucky Leap
4.98

Trend Micro House Call
Suspicious_GEN.F47V0715
7.2.304

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Trojan.Win32.Generic
31720

Zillya! Antivirus
Adware.Yotoon.Win64.2
2.0.0.1926

File size:
53.9 KB (55,232 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\{19854aff-7c07-4859-9831-cd028ac55dd0}t.sys

Digital Signature
Signed by:
PacFunction

Authority:
VeriSign, Inc.

Valid from:
1/9/2014 12:00:00 AM

Valid to:
1/9/2015 11:59:59 PM

Subject:
CN=PacFunction, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=PacFunction, 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:
4DF47FADF68D2EB9B8A7923DCCC176FF

File PE Metadata
Compilation timestamp:
1/31/2014 12:46:38 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:VWbP7EDNtMTw/RWDjR/McKV5qEXGBJgxgZ+4AOmvtnBU6+RRI0g:8P7EJSTukuzTrGYs+JNBUtRE

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...
 
[+]

Code size:
36.3 KB (37,120 bytes)

Driver
Display name:
{19854aff-7c07-4859-9831-cd028ac55dd0}t

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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