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maintainer.bak

Yula

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

Version:
1.0.5735.27967

MD5:
6a499d3586661def90148d2cac3cbff8

SHA-1:
20487c2a2cec8bc9e91acf2edb4f88e940b28215

SHA-256:
30aab7ccb1f35b50ec8cad33a2f54fea58af745d01391a464c4a28c773375fb9

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:
11/5/2024 8:28:53 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.2.27.18

File size:
125.2 KB (128,232 bytes)

Product version:
1.0.5735.27967

Language:
English (United States)

Common path:
C:\ProgramData\8622d9af-b16b-4369-b87a-9ddf7090cd86\maintainer.bak

Digital Signature
Signed by:
Yula

Authority:
VeriSign, Inc.

Valid from:
3/11/2015 2:00:00 AM

Valid to:
4/10/2016 1:59:59 AM

Subject:
CN=Yula, O=Yula, 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:
27284D3180DC36E2DF216CDD159FDC27

File PE Metadata
Compilation timestamp:
9/15/2015 12:32:20 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:
6.2053

Code size:
72.5 KB (74,240 bytes)

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