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{9acd1534-e8f8-40cb-b5ac-4996fe01175b}t.sys

Scan Tack

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {9acd1534-e8f8-40cb-b5ac-4996fe01175b}t.sys by Scan Tack has been detected as adware by 11 anti-malware scanners. It runs as a Windows kernel mode device driver named “{9acd1534-e8f8-40cb-b5ac-4996fe01175b}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 Scan Tack)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
b33d5ba2c8d7a6c1e1898baddd4628c9

SHA-1:
b181ea6faae86aaeb62ee72e94b97fd7ac3fe989

Scanner detections:
11 / 68

Status:
Adware

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

Analysis date:
4/27/2024 1:06:20 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.Agent.OBN
799

AVG
MalSign.Generic
2015.0.3347

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.14919

Bitdefender
Adware.Agent.OBN
1.0.20.1655

Emsisoft Anti-Malware
Adware.Agent.OBN
8.14.11.27.12

G Data
Adware.Agent.OBN
14.11.24

herdProtect (fuzzy)
variant of {552199fb-9890-4055-9aaf-b2f6d51d46e9}gt.sys (Adware)
2014.11.27.17

IKARUS anti.virus
AdWare.SwiftBrowse
t3scan.1.6.1.0

MicroWorld eScan
Adware.Agent.OBN
15.0.0.993

Reason Heuristics
PUP.ScanTack.k
14.9.19.3

VIPRE Antivirus
Trojan.Win32.Generic
28962

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\{9acd1534-e8f8-40cb-b5ac-4996fe01175b}t.sys

Digital Signature
Signed by:
Scan Tack

Authority:
VeriSign, Inc.

Valid from:
1/22/2014 8:00:00 AM

Valid to:
1/23/2015 7:59:59 AM

Subject:
CN=Scan Tack, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Scan Tack, 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:
44D91A3142283CE62B23F23C84838B0D

File PE Metadata
Compilation timestamp:
1/31/2014 8:46:38 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:V6bP7EDNtMTw/RWDjR/McKV5qEXGBJgxgZ+4AOmvtnBU6+RR4c:YP7EJSTukuzTrGYs+JNBUtRt

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:
6.3480

Code size:
36.3 KB (37,120 bytes)

Driver
Display name:
{9acd1534-e8f8-40cb-b5ac-4996fe01175b}t

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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