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setup.exe

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 setup.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. According to AVG, this software downloads additional adware offers during setup. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from sub.steshik.info.
Publisher:
Somoto Ltd.  (signed and verified)

Version:
1.0.0.1

MD5:
8c4e7000102915f3dc59d181392258ed

SHA-1:
c3300e32156f4ac5ab56750b50b84dfcec3e333d

SHA-256:
64b67e1d8c7776ece905a837759bb5d80fd5daee7584652f86ad4cefc9585143

Scanner detections:
17 / 68

Status:
Adware

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

Description:
This is an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
12/5/2024 1:23:53 AM UTC  (today)

Scan engine
Detection
Engine version

AhnLab V3 Security
Win-PUP/Somoto
2015.01.19

avast!
Win32:Somoto-R [PUP]
2014.9-150119

AVG
Downloader
2016.0.3224

Baidu Antivirus
Adware.Win32.Somoto
4.0.3.15119

Bkav FE
W32.HfsAdware
1.3.0.6379

Dr.Web
Trojan.Packed.28357
9.0.1.019

ESET NOD32
Win32/Somoto
9.11035

K7 AntiVirus
Unwanted-Program
13.191.14674

Kaspersky
not-a-virus:Downloader.Win32.Agent
14.0.0.2617

Malwarebytes
PUP.Optional.Somoto
v2015.01.19.04

McAfee
Artemis!8C4E70001029
5600.6880

Panda Antivirus
PUP/MultiToolbar.A
15.01.19.04

Qihoo 360 Security
HEUR/QVM42.0.Malware.Gen
1.0.0.1015

Reason Heuristics
PUP.Installer.Somoto
15.1.19.16

Sophos
Somoto BetterInstaller
4.98

Trend Micro House Call
TROJ_GEN.R047H07AI15
7.2.19

VIPRE Antivirus
Trojan.Win32.Generic
36778

File size:
420.4 KB (430,528 bytes)

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}\setup.exe

Digital Signature
Signed by:
Somoto Ltd.

Authority:
Thawte, Inc.

Valid from:
7/2/2014 3:00:00 AM

Valid to:
7/3/2015 2:59:59 AM

Subject:
CN=Somoto Ltd., O=Somoto Ltd., L=Tel Aviv, S=Israel, C=IL

Issuer:
CN=Thawte Code Signing CA - G2, O="Thawte, Inc.", C=US

Serial number:
6A0C39D0252522A9C448352858ACAACB

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):
12288:uF8g62daaJnrhGQfkdECKxcW1k7PI35xu1:uFdaAnrZCkZu7PIJQ

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:
7.9408

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

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

http://sub.steshik.info/installers/bi_downloader/.../setup.exe

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