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avast_setup.exe

STMSetup

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application avast_setup.exe by STMSetup has been detected as adware by 7 anti-malware scanners. The program is a setup application that uses the installCore installer. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions. The installer is marketed through download protals and search ads as the free AVAST Antivirus but will also install additional software offers which include adware, PUPs and browser toolbars.
Publisher:
STMSetup  (signed and verified)

MD5:
d9bdb6f9d9e2297dd40550b23840267f

SHA-1:
3d8dc14f9729bb569235945fed4a6d65388c7859

SHA-256:
e11abd432733db15485ad057e382b6f192ac71d08f815483cbe1ad30cba1649a

Scanner detections:
7 / 68

Status:
Adware

Explanation:
Uses the InstallCore download manager to install additional potentially unwanted software which may include extensions such as DealPly and various toolbars.

Description:
This is an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
4/19/2024 8:35:10 AM UTC  (today)

Scan engine
Detection
Engine version

AVG
Generic
2015.0.3314

Baidu Antivirus
Adware.Win32.InstallCore
4.0.3.141022

Dr.Web
Adware.InstallCore.386
9.0.1.0295

ESET NOD32
Win32/InstallCore.PL (variant)
8.10325

Reason Heuristics
PUP.Installer.STMSetup.L
14.10.22.7

Sophos
Install Core Click run software
4.98

VIPRE Antivirus
InstallCore
32602

File size:
768.7 KB (787,192 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\avast_setup.exe

Digital Signature
Signed by:
STMSetup

Authority:
COMODO CA Limited

Valid from:
4/27/2014 8:00:00 PM

Valid to:
4/28/2015 7:59:59 PM

Subject:
CN=STMSetup, O=STMSetup, STREET=28 Lenelblome St., L=Tel-Aviv, S=Israel, PostalCode=651307, C=IL

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
4CC8AF2C057FC32A3FA7F44EAADD7EEA

File PE Metadata
Compilation timestamp:
6/19/1992 6:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:iLvpdKvituqtuqjzLyh14hIm3+hTN9Q6dQoO3J+T8ikSBh/h0Nb8XB:iLvbKKQ0uqj/x93+hTplOZ+2+5h0Ny

Entry address:
0x9C40

Entry point:
55, 8B, EC, 83, C4, C4, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, 86, 94, FF, FF, E8, 8D, A6, FF, FF, E8, 1C, A9, FF, FF, E8, 53, C9, FF, FF, E8, 9A, C9, FF, FF, E8, C9, F2, FF, FF, E8, 30, F4, FF, FF, 33, C0, 55, 68, FC, A2, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, C5, A2, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, C0, 40, 00, E8, 96, FE, FF, FF, E8, C9, FA, FF, FF, 8D, 55, F0, 33, C0, E8, 83, CF, FF, FF, 8B, 55, F0, B8, 24, CE, 40, 00, E8, 32, 95, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, 24, CE...
 
[+]

Entropy:
7.8497

Packer / compiler:
Inno Setup v5.x - Installer Maker

Code size:
37 KB (37,888 bytes)

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

http://cdn.click-download.com/?ic_user_id=212

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