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bi_downloader.exe

Better Installer

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_downloader.exe by Somoto has been detected as adware by 17 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:
Better Installer

Version:
2.1

MD5:
9b62c7540bfc4a4a68b2d7a20ee13af5

SHA-1:
5cbce87ad0f5b3f17303d7d253900d2d789f1523

SHA-256:
45a6afe72d646ce831e5949566e59c594894d88a7564a4c00a6de30d6fd21813

Scanner detections:
17 / 68

Status:
Adware

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

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:
5/5/2024 12:25:09 AM UTC  (today)

Scan engine
Detection
Engine version

avast!
Win32:Somoto-F [PUP]
2014.9-130804

Bkav FE
W32.Clod191.Trojan
1.3.0.4613

Boost by Reason
Trojan.Adw.Installer.Somoto.N
2013.8.4.12

Clam AntiVirus
Win.Adware.Toolbar-1
0.98/18155

Dr.Web
Adware.Somoto.4
9.0.1.0216

ESET NOD32
Win32/Somoto
7.9190

Fortinet FortiGate
Adware/Toolbar
8/4/2013

F-Prot
W32/SomotoBetterInstaller.A
v6.4.7.1.166

Malwarebytes
PUP.Optional.Somoto.A
v2013.11.25.09

NANO AntiVirus
Trojan.Win32.Agent.cruvhh
0.28.0.57029

nProtect
Trojan/W32.Agent.141216
13.08.04.03

Reason Heuristics
PUP.Installer.Somoto.N
14.8.7.17

Sophos
Somoto BetterInstaller
4.96

Trend Micro House Call
ADW_SOMOTO
7.2.216

Trend Micro
ADW_SOMOTO
10.465.04

VIPRE Antivirus
BetterInstaller
24860

XVirus List
Win32.Detected
2.8.7

File size:
137.9 KB (141,216 bytes)

Product version:
2.1

File type:
Executable application (Win32 EXE)

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

Language:
Language Neutral

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

Digital Signature
Signed by:
Somoto Ltd.

Authority:
COMODO CA Limited

Valid from:
9/19/2011 5:00:00 PM

Valid to:
9/19/2014 4:59:59 PM

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:
12/5/2009 2:50:46 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
3072:eQIURTXJ6HGcAfs2NV+p94lV8yggbpZP1UzooPgqP7io2mYtJSWZh0v:esEHTh80p9yVtHLP1UzVo3L3truv

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:
7.7965

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file bi_downloader.exe has been seen being distributed by the following 3 URLs.

http://cdn.filebulldog.com/.../bi_downloader.exe

http://installercdn.filebulldog.com/.../bi_downloader.exe

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

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