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maintainer.bak

Webporpoise

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file maintainer.bak by Webporpoise has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat.
Publisher:
Webporpoise  (signed and verified)

Version:
1.0.5557.28945

MD5:
c4cbf498e116f1166a783177f98a6eb7

SHA-1:
7b9394d7b09f124258b23a14d290dc17bde1d3d5

SHA-256:
36e6b3cbcf35cf22a8d38d19563a169916112f1ec1557a5197fb987d8113a539

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:
5/3/2024 5:59:23 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.1.31.6

File size:
120.7 KB (123,640 bytes)

Product version:
1.0.5557.28945

Language:
English (United States)

Common path:
C:\ProgramData\66b0d514-7ab2-481b-8e5b-7c5d00444480\maintainer.bak

Digital Signature
Signed by:
Webporpoise

Authority:
VeriSign, Inc.

Valid from:
3/12/2015 1:00:00 AM

Valid to:
4/11/2016 1:59:59 AM

Subject:
CN=Webporpoise, O=Webporpoise, 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:
0B91659157A711B12C4C801CB6C9FC3E

File PE Metadata
Compilation timestamp:
3/21/2015 12:04:57 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

Entry address:
0x8A72

Entry point:
E8, 95, 57, 00, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 81, EC, 28, 03, 00, 00, A1, 68, B2, 41, 00, 33, C5, 89, 45, FC, 83, 7D, 08, FF, 57, 74, 09, FF, 75, 08, E8, 79, 45, 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...
 
[+]

Code size:
68.5 KB (70,144 bytes)

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