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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 and multiple other hosts.
Publisher:
QuizScope  (signed and verified)

Product:
QuizScope Installer

Version:
4.0.4504.0

MD5:
6bd9047364d2510ba92d59720a4cca48

SHA-1:
2dd7ff4b88738a018d9c4b5ec5239d3688b0b20b

SHA-256:
116fcff531492afd0848092916bee949ac6167c413da28c5c8d9da9a9a6d3aaf

Scanner detections:
1 / 68

Status:
Potentially unwanted

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

Analysis date:
12/25/2024 5:46:31 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.OutBrowse (M)
16.7.23.3

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

CTPH (ssdeep):
6144:BsvB+dX08rJqkEV2dw7Gpt7pvRmqVTrXJTJaA1VBex3RS3DIN:8B8zdqkEV2UGptdZpVJJBVUxITa

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 2 URLs.

http://d1.quizscope.com/.../getclient.php?gcl=YTQwODQwODQ4MTjboUUqDbSzw93+Igg/22Czq0PRK0adxORXQ7cYwaKbOiwAQxDsTNMNULEU/0/yDdlGEI8Uzphl+kXK1HZzsxs/glXLpagdyYRu/R09fs02JPEDzOv86D+W2eyxPhmXcoE=

http://d1.quizscope.com/qscope/getclient.php?gcl=YTQwODQwODQ4MTjboUUqDbSzw93 Igg/22Czq0PRK0adxORXQ7cYwaKbOiwAQxDsTNMNULEU/0/yDdlGEI8Uzphl kXK1HZzsxs/.../R09fs02JPEDzOv86D W2eyxPhmXcoE=

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