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opticalsurfuninstall.exe

Optical Surf

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application opticalsurfuninstall.exe by Optical Surf has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. This is the uninstaller utility registered in the Windows Control Panel for the program Optical Surf by Optical Surf.
Publisher:
Optical Surf  (signed and verified)

MD5:
93eda16caf44ede3595718924c096b04

SHA-1:
f7532d2b53793509cdd98001234102da985d5db8

SHA-256:
12fb7f8910cabb78cfb2b4f47c94f6e0a5bfafd528562a1df073cc99be921974

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:
4/7/2025 6:00:29 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.13.22

File size:
253.4 KB (259,432 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\Program Files\optical surf\opticalsurfuninstall.exe

Digital Signature
Signed by:
Optical Surf

Authority:
VeriSign, Inc.

Valid from:
12/17/2014 7:00:00 AM

Valid to:
12/18/2015 6:59:59 AM

Subject:
CN=Optical Surf, O=Optical Surf, 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:
373EFE200D490F79B1E099C7683F2A7C

File PE Metadata
Compilation timestamp:
12/6/2009 5:52:01 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

Program Uninstaller
Program name:
Optical Surf

Display publisher:
Optical Surf

Display version:
2015.01.02.172330

Uninstall string:
C:\Program Files\Optical Surf\OpticalSurfuninstall.exe


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