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tstlibg.sys

PlurPush

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file tstlibg.sys by PlurPush has been detected as adware by 2 anti-malware scanners. It runs as a Windows kernel mode device driver named “tStLibG”.
Publisher:
StdLib  (signed by PlurPush)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
3664b35608e4103b82773f39e408aafc

SHA-1:
4fe959e1530e53edfe9e2492acd75ec1cd51c8b0

Scanner detections:
2 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/19/2024 8:16:12 AM UTC  (today)

Scan engine
Detection
Engine version

AVG
MalSign.Generic
2015.0.3511

Reason Heuristics
Adware.Yontoo.PlurPush.K
14.8.8.0

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\tstlibg.sys

Digital Signature
Signed by:
PlurPush

Authority:
VeriSign, Inc.

Valid from:
9/18/2013 8:00:00 PM

Valid to:
9/19/2015 7:59:59 PM

Subject:
CN=PlurPush, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=PlurPush, 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:
30ACE095C6EE9F3C39428EB86ECAFADF

File PE Metadata
Compilation timestamp:
1/30/2014 7:46:38 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:VTbP7EDNtMTw/RWDjR/McKV5qEXGBJgxgZ+4AOmvtnBU6+RR8E:xP7EJSTukuzTrGYs+JNBUtRV

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:
6.3469

Code size:
36.3 KB (37,120 bytes)

Driver
Display name:
tStLibG

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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