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setup.exe

Jotzey

This is the installer and setup program from the Jotzey 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 background service that will update the software with additional features. The application setup.exe by Jotzey has been detected as adware by 8 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:
Jotzey  (signed and verified)

MD5:
05ea1d56a1ffb7ba17bbbb661eeb6287

SHA-1:
77b6b6a52f8d630337240effbed50b3326576f47

SHA-256:
5499baf5c7be136f00f94ad26dacddde881e596128881dc1c2dcd22bbbd4c983

Scanner detections:
8 / 68

Status:
Adware

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

Analysis date:
1/14/2025 10:55:08 AM UTC  (today)

Scan engine
Detection
Engine version

Comodo Security
Application.Win32.Altbrowse.AK
17901

ESET NOD32
Win32/BrowseFox (variant)
8.9516

Kaspersky
not-a-virus:AdWare.Win32.Agent
14.0.0.4203

Malwarebytes
PUP.Optional.Jotzey.A
v2014.03.08.07

Reason Heuristics
PUP.Installer.Jotzey.F
14.3.7.18

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.14306

Sophos
Generic PUA PC
4.98

VIPRE Antivirus
Yontoo
27192

File size:
2.7 MB (2,830,128 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

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

Digital Signature
Signed by:
Jotzey

Authority:
VeriSign, Inc.

Valid from:
1/12/2014 2:00:00 AM

Valid to:
1/13/2015 1:59:59 AM

Subject:
CN=Jotzey, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Jotzey, 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:
4C7B335D1F24250859B4B5C0085A062C

File PE Metadata
Compilation timestamp:
12/6/2009 12:52:01 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
49152:sAWF8ABAdRiOr0/6wz0gstSh2FC1+f4eODs3HN9+BJ9wbxaxr3QsEiwnOPvKrbZQ:sAWuABWR/rfwz0esEym397xr3QHiEgwq

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...
 
[+]

Entropy:
7.9986

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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

http://install-cdn.jotzey.net/setup.exe

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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