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installation.exe

Best App

This is the OutBrowse Revenyou installer which bundles offers for additional third party applications that may be unwanted and installed without consent. The application installation.exe by Best App 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 OutBrowse Revenyou installer. The file has been seen being downloaded from clksite.com.
Publisher:
Best App  (signed and verified)

MD5:
9b5e5ffea4a721126de802934f99f50a

SHA-1:
1123e7161baec87635c39d675f7c40bbf7ce1b40

SHA-256:
02c3e4b25c0dc22d38790f45f0ad796ba5ea82a4a0591df807c88d63f07c5884

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 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:
5/11/2024 6:11:52 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Outbrowse.BestApp.Bundler (M)
16.2.22.2

File size:
566 KB (579,632 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
OutBrowse Revenyou (using Nullsoft Install System)

Common path:
C:\users\{user}\downloads\installation.exe

Digital Signature
Signed by:
Best App

Authority:
GlobalSign nv-sa

Valid from:
12/5/2014 9:37:04 AM

Valid to:
12/6/2015 9:37:04 AM

Subject:
CN=Best App, O=Best App, L=Dublin, C=IE

Issuer:
CN=GlobalSign CodeSigning CA - G2, O=GlobalSign nv-sa, C=BE

Serial number:
11215B01F9256F0A054A3A5BFF4B3A8312B6

File PE Metadata
Compilation timestamp:
12/5/2009 10:50:52 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:0wiscOInUHu7GVj1xuVyE/jDtW1Rpw4tbtrcnBG4YseigJ3PnsfD7:0ZUOb1vtW1wub1cnRYsei2y

Entry address:
0x30FA

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 18, EC, 42, 00, E8, F1, 2B, 00, 00, A3, 64, EB, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 98, 8F, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 60, E3, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 40, 43, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9731

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

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

http://clksite.com/adServe/adClick?ai=08zHTxdapFU3SAGBNLKKE5zpVQ1T3QP7BCpS/ HWx8mKyGUCkqInxs8N6uOrIb2X679lDxzoqJnL MFRxr5LhAoycBStX6krVW8vlMirOwt7bl6gYEVhZKnjbiw3fKrX11/.../9GLhyw8sjsUrSC rWeye2KkuxHIOklemOjbbqe 97pKCSavQH9FczVxz kI1ExiRjGAl7I59ckytfHXP3lpZpFlkkLE B146pQ==&ui=SyGiDhFpVmNWz8Wdu7PM01Y37AsT2AewDMRlDug0DrbUhsqRDkKqt1ukqeapEC4M&src=BANNER

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