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air6c21.exe

Software Updater

Installer Setup

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 air6c21.exe by Installer Setup 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 the user's temporary directory. The file has been seen being downloaded from download.myinternetserecurity.com.
Publisher:
Installer Setup  (signed and verified)

Product:
Software Updater

Version:
2.5.0.18

MD5:
e32db2c0465e87c63ff229124ed6e56b

SHA-1:
acd75f6656208e5eb68f268dec1e80683c62ee2e

SHA-256:
83f89e176b206822538ff1bbd15cb9d844f7a39c23574a616c97cef8b9467b3b

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:
1/7/2025 6:42:34 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Installe.Installer (M)
16.4.21.6

File size:
1 MB (1,064,632 bytes)

Product version:
2.5.0.18

Copyright:
(c) Installer Setup

Original file name:
setup.exe

File type:
Executable application (Win32 EXE)

Bundler/Installer:
AirInstaller Download Manager

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\temp\air6c21.exe

Digital Signature
Signed by:
Installer Setup

Authority:
VeriSign, Inc.

Valid from:
10/23/2014 10:00:00 PM

Valid to:
10/23/2016 9:59:59 PM

Subject:
CN=Installer Setup, O=Installer Setup, L=Vancouver, S=British Columbia, C=CA

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
114A4CD0F4776DC50DF11F7D51696678

File PE Metadata
Compilation timestamp:
12/11/2014 7:35:17 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
24576:RHZgVD4WOn4s0UAhRP8DKiPdsvMIn9f76NjOBm3:RHZgVsW7DUAcDZSxnqjcy

Entry address:
0x345CF0

Entry point:
60, BE, 00, B0, 64, 00, 8D, BE, 00, 60, DB, FF, 57, 83, CD, FF, EB, 10, 90, 90, 90, 90, 90, 90, 8A, 06, 46, 88, 07, 47, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 72, ED, B8, 01, 00, 00, 00, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C0, 01, DB, 73, 0B, 75, 28, 8B, 1E, 83, EE, FC, 11, DB, 72, 1F, 48, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C0, EB, D4, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C9, EB, 52, 31, C9, 83, E8, 03, 72, 11, C1, E0, 08, 8A, 06, 46, 83, F0, FF, 74, 75, D1, F8, 89...
 
[+]

Packer / compiler:
UPX 2.90LZMA

The file air6c21.exe has been seen being distributed by the following URL.

http://download.myinternetserecurity.com/v1.5/click/.../?uid=bL10SqMNIY&sid=600807910

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