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nebulous.exe

Nebulous

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 nebulous.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. The file has been seen being downloaded from download.chdownload.eu.
Publisher:
Download Assistant  (signed and verified)

Product:
Nebulous

Version:
3.0.0.156

MD5:
af38d28a0cdd3c08d49d08b6b344a7ce

SHA-1:
c2402c0ade3741c732c3862e9303af8cd8e419a0

SHA-256:
540a3d725e7b6a0f0658f868365ab0ce4247b43274f4176b93eaf9b234cbe4e9

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:
11/24/2024 10:14:50 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Download.Bundler (M)
16.6.11.18

File size:
1.1 MB (1,143,640 bytes)

Product version:
3.0.0.156

Copyright:
(c) Download Assistant

File type:
Executable application (Win32 EXE)

Bundler/Installer:
AirInstaller Download Manager

Language:
Language Neutral

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

Digital Signature
Signed by:
Download Assistant

Authority:
Symantec Corporation

Valid from:
5/3/2016 4:00:00 AM

Valid to:
8/2/2017 3:59:59 AM

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:
088066A3A015128F544F3E16DC53BCE8

File PE Metadata
Compilation timestamp:
1/30/2013 6:21:56 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
24576:1xGHJn/kiVli3ZmXxZYAIEJSoBcvZ06CPUMCiWEJakd:upn/WJmBZfxg3CVwEJakd

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:
6.9723

Developed / compiled with:
Microsoft Visual C++

Code size:
65.5 KB (67,072 bytes)

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

http://download.chdownload.eu/v2/click/5cd6b580/?affiliate_image=&d=http://cloud.bluestacks.com/api/getdownload?platform=win&filename=nebulous&icon=&key=bb02dcb351bc88ee4663c71f6574148fcd639257ce29fd121a5b978200a490c1&n=Nebulous&product_image=http://www.gamesonpc.net/.../image-installer.png&sid=games-nebulous&uid=&uao=TW96aWxsYS81LjAgKFdpbmRvd3MgTlQgMTAuMDsgV09XNjQpIEFwcGxlV2ViS2l0LzUzNy4zNiAoS0hUTUwsIGxpa2UgR2Vja28pIENocm9tZS81MC4wLjI2NjEuMTAyIFNhZmFyaS81MzcuMzY_&scid=b743ad0a-28ba-11e6-ba8a-0401ac006801

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