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maintainer.exe

TowerTilt

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application maintainer.exe by TowerTilt has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a separate (within the context of its own process) windows Service named “MaintainerSvc4.20.9060156”.
Publisher:
TowerTilt  (signed and verified)

Version:
1.0.5560.34785

MD5:
f4d5f2aa3ebe341bbf962bdf44220f84

SHA-1:
7d8c9427cbf1ec1e405b84a54fdec823f5017e01

Scanner detections:
1 / 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:
5/20/2024 5:29:58 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.11.16

File size:
125.2 KB (128,240 bytes)

Product version:
1.0.5560.34785

File type:
Executable application (Win32 EXE)

Common path:
C:\Documents and Settings\{user}\Application data\34dc5208-3f7e-436e-907b-3dc21b172840\maintainer.exe

Digital Signature
Signed by:
TowerTilt

Authority:
VeriSign, Inc.

Valid from:
2/4/2015 2:00:00 AM

Valid to:
3/6/2016 1:59:59 AM

Subject:
CN=TowerTilt, O=TowerTilt, L=Santa Monica, 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:
151BCA3254BAE006FC1D46147BBE6BA4

File PE Metadata
Compilation timestamp:
3/24/2015 4:19:36 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

Entry address:
0x9872

Entry point:
E8, 75, 62, 00, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 81, EC, 28, 03, 00, 00, A1, 68, C2, 41, 00, 33, C5, 89, 45, FC, 83, 7D, 08, FF, 57, 74, 09, FF, 75, 08, E8, 59, 50, 00, 00, 59, 83, A5, E0, FC, FF, FF, 00, 6A, 4C, 8D, 85, E4, FC, FF, FF, 6A, 00, 50, E8, 7A, F3, FF, FF, 8D, 85, E0, FC, FF, FF, 89, 85, D8, FC, FF, FF, 8D, 85, 30, FD, FF, FF, 83, C4, 0C, 89, 85, DC, FC, FF, FF, 89, 85, E0, FD, FF, FF, 89, 8D, DC, FD, FF, FF, 89, 95, D8, FD, FF, FF, 89, 9D, D4, FD, FF, FF, 89, B5, D0, FD, FF, FF, 89, BD, CC...
 
[+]

Entropy:
6.2061

Code size:
72.5 KB (74,240 bytes)

Service
Display name:
MaintainerSvc4.20.9060156

Type:
Win32OwnProcess

Depends on:
RPCSS


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