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wildwestsetup.exe

Wild West

This is the installer and setup program from the Wild West branded Yontoo adware web browser extension. This adware injects various forms of advertisements in the user's web browser based on the HTML content and URLs viewed. Ad include banners, in-line context text links, coupons, and search. The program will install an auto-updating Windows service that will update the software with additional features. The application wildwestsetup.exe by Wild West has been detected as adware by 11 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages.
Publisher:
Wild West  (signed and verified)

MD5:
0dd5076a56f1f8019b7fdec8806aa204

SHA-1:
bff3fdaa0479bce00e63f2991c855e2a4bc73254

SHA-256:
0d3b40c0f7c12cc7a293c2c277cf986d5d81c394c9ba9b30362ef9d12dd10d4e

Scanner detections:
11 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
5/7/2024 6:31:28 PM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/BrowseFox.Gen
3.6.1.96

Bkav FE
W32.HfsAdware
1.3.0.6379

Dr.Web
Trojan.Yontoo.1734
9.0.1.0277

G Data
NSIS.Application.BrowseFox
15.10.25

herdProtect (fuzzy)
variant of 164ea663_stp.exe (Adware)
2015.10.4.20

K7 AntiVirus
Unwanted-Program
13.204.16103

NANO AntiVirus
Trojan.Win32.Siggen6.droatj
0.30.24.1636

Reason Heuristics
PUP.Yontoo.WildWest.Installer (M)
15.8.18.19

Sophos
Browse Fox
4.98

Trend Micro House Call
Suspicious_GEN.F47V0313
7.2.277

VIPRE Antivirus
Threat.4150696
40552

File size:
465 KB (476,112 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\wildwestsetup.exe

Digital Signature
Signed by:
Wild West

Authority:
VeriSign, Inc.

Valid from:
1/10/2015 6:00:00 PM

Valid to:
1/11/2016 5:59:59 PM

Subject:
CN=Wild West, O=Wild West, L=San Diego, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
496B67C883386C82B7E6FF63CEFE1466

File PE Metadata
Compilation timestamp:
12/5/2009 4:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:Nkxc1s15Ap/G/8/3D0Fw/tN8dkmLtpHHHrh7Y:Nmc6j8/z0FmcLbH1Y

Entry address:
0x30CB

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, 38, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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

http://install-cdn.mywildwestapp.com/sd?is=ppj

The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to wac.edgecastcdn.net  (72.21.81.13:80)

TCP (HTTP):
Connects to service.yontoo.com  (8.25.35.148:80)

TCP (HTTP):
Connects to api.yontoo.com  (8.25.35.15:80)

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