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maintainer.bak

TasticSurf

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

Version:
1.0.5427.36956

MD5:
ed3fb7e4fce81d952d953666f7d868cd

SHA-1:
cba74be001b31c42aa72c29cf43411d347908020

SHA-256:
51432b24feb898505a18e87c4793395509e96b43bd2775931ac48f548f61bde1

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:
11/27/2024 2:07:38 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
16.11.30.0

File size:
120.8 KB (123,680 bytes)

Product version:
1.0.5427.36956

Language:
English (United States)

Common path:
C:\ProgramData\d2446020-ddff-402b-b064-199d2ce66b2b\maintainer.bak

Digital Signature
Signed by:
TasticSurf

Authority:
VeriSign, Inc.

Valid from:
11/27/2013 7:00:00 AM

Valid to:
11/28/2014 6:59:59 AM

Subject:
CN=TasticSurf, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=TasticSurf, 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:
7A9A017A31DB5E88B561FEDAF60E6163

File PE Metadata
Compilation timestamp:
11/11/2014 11:32:01 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
1536:G3eRgxyOpGX5sfnC6P2dV59IikYYf9J892bbY+m4bcQ/Wm1sWjcdFPQI0ypxCO81:aK35/9oxfTk+Hvn6FPQI0ypxCOdXbZv2

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...
 
[+]

Entropy:
6.1807

Code size:
68.5 KB (70,144 bytes)

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