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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:
d9f9f656b2ca8d9b31d9b9b697afe2ff

SHA-1:
14879acbb477bc97f1c8506cc014e951290b9f65

SHA-256:
715d78f2dcc32bdd6cc389fc23989b5e84d781ef586623625e9e36dc189fe0b9

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 12:10:31 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.OutBrowse (M)
17.1.23.0

File size:
272.4 KB (278,952 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\temporary internet files\content.ie5\{random}\quizscope.exe

Digital Signature
Signed by:
QuizScope

Authority:
thawte, Inc.

Valid from:
8/16/2016 7:00:00 PM

Valid to:
9/8/2017 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:
00EDCABAF8F13865E9D4A777523FD46F

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=OTYwMjc0Njg1ONuhRSoNtLPD3f4iCD/bYLPkPaQrU8vVNPVja0FDxL0nCOE3RwfKc2V9uN2XLwJDshs6d/uMUWr/8wS0td0ToK3GdtPlM4EzNv++H/NEryJ7yfN4covXVgBJ0y8F9qUHRg==

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