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maintainer.exe

LemurLeap

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application maintainer.exe by LemurLeap 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 “MaintainerSvc6.89.982339”. While running, it connects to the Internet address install.lemurleap.info on port 80 using the HTTP protocol.
Publisher:
LemurLeap  (signed and verified)

Version:
1.0.5621.8593

MD5:
4b89514718863a26506f8501d2aea2b0

SHA-1:
1e0eaf51940383e725d0747ffe07fea2be5b4df4

SHA-256:
88eeef8278cd9026d0fd3f680f7c23a5c468bd81aa19b8e98fd3160a7bfe6b2e

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:
11/23/2024 3:09:12 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.2.18.18

File size:
125.3 KB (128,288 bytes)

Product version:
1.0.5621.8593

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\ProgramData\29a882f6-268a-4df9-b011-02fdee89f086\maintainer.exe

Digital Signature
Signed by:
LemurLeap

Authority:
VeriSign, Inc.

Valid from:
8/12/2013 5:00:00 PM

Valid to:
8/13/2015 4:59:59 PM

Subject:
CN=LemurLeap, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=LemurLeap, 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:
59846B2F05AAAD396A7E942BF33F16B3

File PE Metadata
Compilation timestamp:
5/23/2015 4:46:31 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:
6.2065

Code size:
72.5 KB (74,240 bytes)

Service
Display name:
MaintainerSvc6.89.982339

Type:
Win32OwnProcess

Depends on:
RPCSS


The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to wpc.0952.edgecastcdn.net  (68.232.34.163:80)

TCP (HTTP):
Connects to install.lemurleap.info  (70.186.131.186:80)

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