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cdn_downloadbfiles_net.exe

Web application

Download Expert

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application cdn_downloadbfiles_net.exe, “Web application Setup ” by Download Expert has been detected as adware 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. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from cdn.downloadbfiles.net.
Publisher:
Dnldstr_Aggregator  (signed by Download Expert)

Product:
Web application

Description:
Web application Setup

Version:
6.0.44.32183

MD5:
831e54bc8d3adfef43b163055a837418

SHA-1:
1ae8da4cf9c5ce251071f14e0a23a10f661bb761

SHA-256:
51fa5fd56883c799b726a708b9695e8e1f4ff29517fe5e9b9e9f991eeeec1ab5

Scanner detections:
1 / 68

Status:
Adware

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 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:
5/30/2024 9:16:30 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.installCore.DownloadExpert.Installer (M)
16.2.17.10

File size:
779.6 KB (798,280 bytes)

Product version:
1.2

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\cdn_downloadbfiles_net.exe

Digital Signature
Signed by:
Download Expert

Authority:
COMODO CA Limited

Valid from:
1/8/2015 5:00:00 PM

Valid to:
1/8/2017 4:59:59 PM

Subject:
CN=Download Expert, O=Download Expert, STREET="1732 1st Ave #26525", L=New York, S=NY, PostalCode=10128, C=US

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

Serial number:
7C1978BE5B6B2A725229D28FC08FA2AC

File PE Metadata
Compilation timestamp:
6/19/1992 4:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:equCO8cuopOJiUMFc5kS633lnNzowpMgIl9/aIMe2m:eqPpogiUM+5kS631Swj4N2m

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, BF, A9, FF, FF, E8, 5E, 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:
7.8865

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

Code size:
37 KB (37,888 bytes)

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

http://cdn.downloadbfiles.net/?downloadAs=Firefox_Setup.exe&data=GAXAyDGi1VuGBQ2GTrui7gPXl6q9VF3pp1u9WQBTiUIWmxZ5Imj1NYyBXLm94htWCzjqjgBQ3CtrQB9c1eOZAWTwWeVmQaLWkJu6F3kxGwh/rwHWn0mvindAb9HkW mDOzpUdt5PX3hfyj59CkaRUk5qgCVFWkQ3sg8Lu/RHqyIJcT2sCgKGX1P8rFtArM9Ll9V/BRlyG73 WHK5sBAElx65deRvRXpSSgHO5v7DcRG1RFRpbgrNxxehY/3rNfI80wGgHZ1crzAJKi3kOS/2wJv4mq3E/K aSJFojRC WHffvl4tSGLd/IEa qjd79Gd1/9PpygswYp94pCi3PmbRdg DoAiRDpgWJFaNbkU/HfATbhgCYttO krJ9didGO3wyF4dV/nZenEUqKI9Iit0U6FSYz/FL3AEgTdSU6gfRwyTugDOahmXS5Dgk3ObK0xHFFACvfTHNevjjweaiTC8l1GQOaZCATKET lYHMedYbPBRsQNZxd8xZ4ERRGyoz7GOm6a3EkzP2UJO/fHz6hlW4WQRffWEQgtzObZrjbILeO1XyPpQ9DNpuxiPfg4T6i0b1C/TMbM79qW5R2zUWlywji2CRYhWhQ36FIztgxOaGvv8KaIe7Wcq56hIDTiyece/jfTE8fE2KlhyZWCP7 TYdKdAUeP27klULiU9BAlPxvsNp3EUK2L2/80AT aoKo3zFUB4Ns/68IJqFBU9qXQ89SI/q8FcX/poCzW5WcOjtDles2JHZJM2fsCEeHk9hpjXK/Qvblq8SLQQLgIz7A1jmgzCHNpf7wXW7aeK/dB6LHSOyaUcKi6E0rgqInvM8zpNEc1bKOfQYK2En6SrN9uPt6/F6 k0eD0Vzwqg0/e2Gtvm8xTU37Z5996HSYfzzunZa/.../7lMsWW7E2UQUWF9l

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