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bi_stub.exe

BI Stub

Somoto Ltd.

Somoto uses a monetization platform known as the 'Better Installer' to provide the ability of 3rd party developers to bundle various adware packages through an affiliate pay-per-install program. The application bi_stub.exe, “Powered by BetterInstaller” by Somoto has been detected as adware by 5 anti-malware scanners. The program is a setup application that uses the Somoto BetterInstaller installer. Includes the Somoto BetterInstaller, an adware installer that will bundle offers for additional third party applications, mostly adware toolbars, with legitimate softare and may be installed without adequate user consent.
Publisher:
Somoto Ltd.  (signed and verified)

Product:
BI Stub

Description:
Powered by BetterInstaller

Version:
1.1.0.0

MD5:
1018275f2f0241cc72288595deb479d5

SHA-1:
725385d242a68ae1d312df4176fc406467ecf903

SHA-256:
efb02ca56fe4c93c19e9fdc2280ceab6c9bca78ce8b1f77cd48021dee994eb54

Scanner detections:
5 / 68

Status:
Adware

Explanation:
Uses the Somoto 'BetterInstaller' to bundle additional (unwanted) software during install without adequate consent.

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:
12/26/2024 12:14:39 AM UTC  (today)

Scan engine
Detection
Engine version

avast!
Win32:Somoto-J [PUP]
2014.9-140105

Reason Heuristics
PUP.BetterInstaller.Somoto.H
14.8.7.17

Sophos
Somoto BetterInstaller
4.91

Trend Micro House Call
TROJ_GEN.F47V0630
7.2.5

VIPRE Antivirus
BetterInstaller
19756

File size:
49.2 KB (50,352 bytes)

Product version:
1.1.0.0

File type:
Executable application (Win32 EXE)

Bundler/Installer:
Somoto BetterInstaller (using Nullsoft Install System)

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

Digital Signature
Signed by:
Somoto Ltd.

Authority:
COMODO CA Limited

Valid from:
9/20/2011 3:00:00 AM

Valid to:
9/20/2014 2:59:59 AM

Subject:
CN=Somoto Ltd., O=Somoto Ltd., STREET=PO Box 58096, L=Tel Aviv, S=--, PostalCode=61580, C=IL

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
00841D099D16B738F34172FEEFE1D2574F

File PE Metadata
Compilation timestamp:
12/6/2009 1:50:46 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
768:c1cVhpQI2EQK0iPDh84nScF15GYbWjXO3XJGaSowi/a8l3vk4xhx4D:6QpQ5EP0ijnRTXJGaSoVFThx4D

Entry address:
0x323C

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 58, 3F, 42, 00, E8, 09, 2C, 00, 00, A3, A4, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 58, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, B8, 91, 40, 00, 68, A0, 36, 42, 00, E8, BC, 28, 00, 00, FF, 15, B0, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, AA, 28, 00, 00...
 
[+]

Entropy:
7.0251

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

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

http://d1p2zvpeuweyai.cloudfront.net/sdk/.../bi_stub.exe

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