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18a7551f.exe

Firefox Browser

Download Assistant

This is part of the Air Installer, a download manager which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed with minimal consent. The application 18a7551f.exe by Download Assistant 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 AirInstaller Download Manager installer. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from download.review-assist.com.
Publisher:
DownloadAsst_New  (signed by Download Assistant)

Product:
Firefox Browser

Version:
3.0.0.105

MD5:
346a1e885a0dd3b237f1c8b32b6051bc

SHA-1:
4b57c2853a141750682084e5bd8209d48d5bc1ed

SHA-256:
0b1942547ce555cda1d23c519ecc25df79717e5fcfd87b0f43890ba97e9122ed

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 'download manager' is also considered bundleware, a utility designed to download software (possibly legitimate or opensource) and bundle it with a number of optional offers including ad-supported utilities, toolbars, shopping comparison tools and browser extensions.

Analysis date:
12/27/2024 12:33:45 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Download.Bundler (M)
16.5.30.9

File size:
1.1 MB (1,104,480 bytes)

Product version:
3.0.0.105

Copyright:
(c) DownloadAsst_New

File type:
Executable application (Win32 EXE)

Bundler/Installer:
AirInstaller Download Manager

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\18a7551f.exe

Digital Signature
Signed by:
Download Assistant

Authority:
Symantec Corporation

Valid from:
2/16/2015 12:00:00 AM

Valid to:
2/16/2016 11:59:59 PM

Subject:
CN=Download Assistant, O=Download Assistant, L=Victoria, S=British Columbia, C=CA

Issuer:
CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US

Serial number:
3784E4CAC60231ED82FD7E8E845E8CE3

File PE Metadata
Compilation timestamp:
1/30/2013 2:21:56 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:4xGPsEpXNnuVgiKDVU53oplGYt+r3K2btOl7FePUQqMex+K:9UcuV+hU53ovGYK3Kjl+K

Entry address:
0x113BC

Entry point:
55, 8B, EC, 83, C4, A4, 53, 56, 57, 33, C0, 89, 45, C4, 89, 45, C0, 89, 45, A4, 89, 45, D0, 89, 45, C8, 89, 45, CC, 89, 45, D4, 89, 45, D8, 89, 45, EC, B8, 2C, 00, 41, 00, E8, E8, 51, FF, FF, 33, C0, 55, 68, 9E, 1A, 41, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 5A, 1A, 41, 00, 64, FF, 32, 64, 89, 22, A1, 48, 5B, 41, 00, E8, 16, D8, FF, FF, E8, 65, D3, FF, FF, 80, 3D, DC, 2A, 41, 00, 00, 74, 0C, E8, 2B, D9, FF, FF, 33, C0, E8, 80, 32, FF, FF, 8D, 55, EC, 33, C0, E8, E2, A3, FF, FF, 8B, 55, EC, B8, 50, 86...
 
[+]

Entropy:
6.9474

Developed / compiled with:
Microsoft Visual C++

Code size:
65.5 KB (67,072 bytes)

The file 18a7551f.exe has been seen being distributed by the following URL.

http://download.review-assist.com/v2/click/18a7551f/?d=http://www.installer-assist.com/download/FirefoxSetup.exe&key=b08ffa54b7fff78b9952f8fe1bb3dc2c9745870d0e26f8452319959bf68cf0ae&sid=uk-Firefox Browser&uid=uk-Firefox Browser&affiliate_image=http://download-assist.com/admin/.../Mozilla-Firefox-icon_i.png&product_image=http://download-assist.com/admin/.../Mozilla-Firefox-icon_p.png&n=Firefox Browser&filename=firefox

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