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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:
586ba13d4d5db25e305bfd31b04fa38e

SHA-1:
2313cfcea2f592d81daf4c9f889986ad77bca8ae

SHA-256:
8d383cc7e6656288a2a79a2fe4e9e9faf71c57fde0c8dfbe874f9a3d7850f2c4

Scanner detections:
1 / 68

Status:
Potentially unwanted

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

Analysis date:
5/21/2024 12:31:12 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.OutBrowse.QuizScop.Installer (M)
16.6.1.2

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 5:00:00 PM

Valid to:
9/8/2016 4:59:59 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 2:50:46 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
6144:Bs3B+dX08rJqkEV2dw7Gpt7pvRmqVTrXJTJaA1VBex3RS3DI6:gB8zdqkEV2UGptdZpVJJBVUxITt

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:
7.9129

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/qscope/getclient.php?gcl=OTQ1Njc5NzgxMtuhRSoNtLPD3f4iCD/.../caSFBrkRBiVPqc3hwqY5pMaJ DVKYdhhwzsfBMCArJB4ksFs66lJRLyh5B99RkK3DJ91w==

http://d1.quizscope.com/qscope/getclient.php?gcl=OTQ1Njc5NzgxMtuhRSoNtLPD3f4iCD/.../caSFBrkRBiVPqc3hwqY5pMaJ DVKYdhhwzsfBMCArJB4ksFs66lJRLyh5B99RkK3DJ91w==

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