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avast.exe

Busup

CPC Net adVertising llc

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application avast.exe, “Busup Setup ” by CPC Net adVertising llc 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 installCore installer. With this installer, users are expecting to download the free AVAST Antivirus but before that occurs they may be presented with additional offers, mostly potentially unwanted software or adware.
Publisher:
CPC Net adVertising llc  (signed and verified)

Product:
Busup

Description:
Busup Setup

Version:
3.6.1.4

MD5:
4e08262e665056ecda9816ffe361a675

SHA-1:
cd31dcacc29f04a4c6d24fcf24927b0a3f0e7bc6

SHA-256:
4ca7a2004d8133396710ce548d5185b22392e7a1e0b141da6ab0bcf6cbff6600

Scanner detections:
1 / 68

Status:
Potentially unwanted

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Description:
This is also known as bundleware, or downloadware, which is an downloader designed to simply deliver ad-supported offers in the setup routine of an otherwise legitimate software.

Analysis date:
2/26/2025 8:53:55 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.installCore (M)
16.8.10.14

File size:
965.6 KB (988,792 bytes)

Product version:
5.1.0

Copyright:
Wizard Installer Stub

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Language:
Language Neutral

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

Digital Signature
Signed by:
CPC Net adVertising llc

Authority:
thawte, Inc.

Valid from:
4/14/2016 2:00:00 AM

Valid to:
4/15/2017 1:59:59 AM

Subject:
CN=CPC Net adVertising llc, OU=IT, O=CPC Net adVertising llc, L=Wilmington, S=Delaware, C=US

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

Serial number:
3A1AFB5694D65DFB7794393E557E5340

File PE Metadata
Compilation timestamp:
6/20/1992 12:22:17 AM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:UiQXRAii7Mq2q9QQbtgHiDy0DIAutasIt:pyxi772gtfDy0DIAxsq

Entry address:
0xA5F8

Entry point:
55, 8B, EC, 83, C4, C4, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, CE, 8A, FF, FF, E8, D5, 9C, FF, FF, E8, 64, 9F, FF, FF, E8, 07, A0, FF, FF, E8, A6, BF, FF, FF, E8, 11, E9, FF, FF, E8, 78, EA, FF, FF, 33, C0, 55, 68, C9, AC, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 92, AC, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, C0, 40, 00, E8, 26, F5, FF, FF, E8, 11, F1, FF, FF, 80, 3D, 34, B2, 40, 00, 00, 74, 0C, E8, 23, F6, FF, FF, 33, C0, E8, C4, 97, FF, FF, 8D, 55, F0, 33, C0, E8, B6, C5, FF, FF, 8B, 55...
 
[+]

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

Code size:
39.5 KB (40,448 bytes)

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

http://www.tourapplicationslaboratory.com/.../yzwRsif34o=&c=JuWfxkPa3CnDhgqkaen624lzDkB17xEOJVmzZTSkEa76bUVTwrgZbZET1c7C9i1RFeqtc3wFv0wCd2zXN6atY mR3Q8GIkivMYwjsUUctdxHOyu0HQijJnkQ56lzm0dU&fallback_url=Fallback URL&downloadAs=avast.exe

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