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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 14 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:
3dba8e68c99eaa76dd3b186e8fadf074

SHA-1:
9619e7b0fd2169bd212684795af93dd19b9f5c71

SHA-256:
9ce68962ce3bea770f3ababbc0dabe135ccc00db67dbd45459379b3423caaeda

Scanner detections:
14 / 68

Status:
Adware

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

Analysis date:
4/23/2024 11:45:10 PM UTC  (a few moments ago)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.Yotoon
7.1.1

Avira AntiVirus
Adware/BrowseFox.A.282
7.11.181.44

AVG
Pafun
2015.0.3311

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141025

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

Dr.Web
Trojan.BPlug.117
9.0.1.0298

F-Prot
W32/A-caf5c463
v6.4.7.1.166

IKARUS anti.virus
AdWare.SwiftBrowse
t3scan.1.6.1.0

NANO AntiVirus
Trojan.Win32.BPlug.dcxxfx
0.28.2.61148

Reason Heuristics
PUP.PacFunction.k
14.10.25.6

Sophos
Lucky Leap
4.98

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Yontoo
27574

Zillya! Antivirus
Adware.Yotoon.Win64.2
2.0.0.1926

File size:
53.8 KB (55,104 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 1:00:00 AM

Valid to:
1/10/2015 12:59:59 AM

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:
8/7/2014 1:52:31 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:tOnnE+ZwNszUTw/RqzGojR/h3cKG45q30XGBUuJ0xEkMHd8OagKmvz11/6RRR50T:unERxTukHzTrGCuGOVh1/yRa

Entry address:
0xA6BE

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 4A, E4, FF, FF, CC, CC, 34, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 04, AB, 00, 00, 94, 90, 00, 00, 20, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 3A, AB, 00, 00, 80, 90, 00, 00, 2C, A7, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 56, 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, 26, AB, 00, 00, 12, AB, 00, 00, 00, 00, 00, 00, 42, AB, 00, 00, 00, 00, 00, 00, 2C, A8, 00, 00, 44, A8, 00, 00, 56, 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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