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maintainer.exe

PowerfulBrowse

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application maintainer.exe by PowerfulBrowse 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 “MaintainerSvc3.05.895924”.
Publisher:
PowerfulBrowse  (signed and verified)

Version:
1.0.5709.26933

MD5:
e196eafcab0192a1f1769644f4dea0e0

SHA-1:
85bcacda4de144932092a53e7a47b98a2c2e5613

SHA-256:
fb4d1faeacfa2d3420965ec0775518a91f967f92f48bdb7f95a916bbe06bd27c

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:
12/25/2024 12:29:49 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
16.8.26.7

File size:
125.2 KB (128,248 bytes)

Product version:
1.0.5709.26933

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\ProgramData\68109394-348d-43d8-b6cb-7042b26948ea\maintainer.exe

Digital Signature
Signed by:
PowerfulBrowse

Authority:
VeriSign, Inc.

Valid from:
3/17/2015 8:00:00 PM

Valid to:
5/16/2016 7:59:59 PM

Subject:
CN=PowerfulBrowse, O=PowerfulBrowse, 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:
5BD9F675D1AB6190F2C5638516563F26

File PE Metadata
Compilation timestamp:
8/19/2015 5:57:51 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:WD1Ll2ZpujSiZF4gFsym2UG0IHhxDOc9Vi3a:WBVDFHwKuc/Ya

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:
6.2071

Code size:
72.5 KB (74,240 bytes)

Service
Display name:
MaintainerSvc3.05.895924

Type:
Win32OwnProcess

Depends on:
RPCSS


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