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quizscope.exe

QuizScope Installer

QuizScope

The application quizscope.exe by QuizScope has been detected as a potentially unwanted program 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. The setup routine uses the RevenYou.Com Pay Per Install platform (OutBrowse) which bundles additional software offers inclduing toolbars, extensions, PC utilities as well as other PUPs. The file has been seen being downloaded from d1.quizscope.com.
Publisher:
QuizScope  (signed and verified)

Product:
QuizScope Installer

Version:
4.0.4504.0

MD5:
7e99b6476c4f0e672d954831d975258d

SHA-1:
632fdac4dbf30716ccc529a98d9b331f52ac1e24

SHA-256:
ce238b9dd5c9e07d0504b2f51f5e5dbd397ed9876b964f2d3565b3ec68cb0f19

Scanner detections:
1 / 68

Status:
Potentially unwanted

Explanation:
Bundles additional adware offers during download and installation using the OutBrowse installer.

Analysis date:
7/6/2025 12:16:21 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.OutBrowse (M)
17.1.10.10

File size:
272.5 KB (279,016 bytes)

Product version:
4.0.4504.0

Copyright:
Copyright (C) 2015

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\inetcache\ie\{random}\quizscope.exe

Digital Signature
Signed by:
QuizScope

Authority:
thawte, Inc.

Valid from:
9/8/2015 7:00:00 PM

Valid to:
9/8/2016 6:59:59 PM

Subject:
CN=QuizScope, O=QuizScope, L=Irvine, S=California, C=US

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
6334CF32E921A4E1CD4C0C18E1CEBE72

File PE Metadata
Compilation timestamp:
12/5/2009 4:50:46 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x323C

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 58, 3F, 42, 00, E8, 09, 2C, 00, 00, A3, A4, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 58, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, B8, 91, 40, 00, 68, A0, 36, 42, 00, E8, BC, 28, 00, 00, FF, 15, B0, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, AA, 28, 00, 00...
 
[+]

Entropy:
7.9128

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file quizscope.exe has been seen being distributed by the following URL.

http://d1.quizscope.com/.../getclient.php?gcl=YTEyNjkzMTQ2MTHboUUqDbSzw93+Igg/22Czq0PRK0adxOT3onzkRi8iXO3etrcHtAT6tuHjF6eT6dmqOR8+Rq3IutTIjcDh/SVUWTMXJ+UbxTiETUJ4LNVVUB3I0n+DAS9xEgA3njIqOBTpTP4giPlr6g==

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