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yontoosetup-s.exe

Yontoo

Yontoo LLC

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application yontoosetup-s.exe by Yontoo has been detected as adware by 16 anti-malware scanners. This is a setup and installation application and has been known to bundle potentially unwanted software. It is also typically executed from the user's temporary directory.
Publisher:
Yontoo LLC  (signed and verified)

Product:
Yontoo

Description:
Installer

Version:
2012.10.23.1736

MD5:
ae7e0c99c5bc7d28325c0cd7885c851f

SHA-1:
9588275ff7803065136fc9eaf31bdfc74c97a5e3

SHA-256:
de17b97138429dac9892024c4becb240728146ad5370477a595f23d361d2df55

Scanner detections:
16 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/23/2024 1:49:25 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Adware.Yontoo
7.1.1

Avira AntiVirus
ADWARE/Yontoo.Gen
7.11.115.110

Baidu Antivirus
AdWare.Win32.Yontoo
4.0.3.13124

Boost by Reason
Optional.Yontoo.N
188838

Comodo Security
UnclassifiedMalware
17332

Dr.Web
Adware.Siggen.24249
9.0.1.0338

ESET NOD32
Win32/Adware.Yontoo (variant)
7.9087

IKARUS anti.virus
AdWare.Yontoo
t3scan.2.2.29

Malwarebytes
PUP.Optional.Yontoo.A
v2013.12.04.02

MicroWorld eScan
Adware/Yontoo.E.1
15.0.0.135

NANO AntiVirus
Trojan.Win32.Siggen.bkcmvz
0.26.0.53954

Reason Heuristics
PUP.Installer.Yontoo.N
14.8.7.17

Rising Antivirus
Trojan.InstallRex!562A
23.00.65.131202

Trend Micro House Call
TROJ_FAKEAV.BMC
7.2.355

Trend Micro
TROJ_FAKEAV.BMC
10.465.21

VIPRE Antivirus
Yontoo
23700

File size:
1 MB (1,062,504 bytes)

Product version:
1.10.03

Copyright:
Copyright (c) 2012 Yontoo LLC. All rights reserved.

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\temp\yontoosetup-s.exe

Digital Signature
Signed by:
Yontoo LLC

Authority:
VeriSign, Inc.

Valid from:
12/6/2011 7:00:00 PM

Valid to:
12/6/2012 6:59:59 PM

Subject:
CN=Yontoo LLC, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Yontoo LLC, L=Carlsbad, 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:
4F8617352536F013088C9B5533AA4440

File PE Metadata
Compilation timestamp:
3/10/2011 9:55:32 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
24576:gtxM8jLUej9eLdKF2vUbb/8lbOycGnhLKeAPPp7:QxM8ce9eLdK9bbaz05N

Entry address:
0x1627

Entry point:
55, 8B, EC, 81, EC, 58, 0B, 00, 00, 53, 56, 33, DB, 57, 66, 89, 9D, A8, F4, FF, FF, 89, 5D, FC, FF, 15, 74, 30, 40, 00, A3, 00, 40, 40, 00, FF, 15, 70, 30, 40, 00, 89, 45, F8, 8D, 85, B8, FC, FF, FF, 50, C7, 85, B8, FC, FF, FF, 14, 01, 00, 00, FF, 15, 6C, 30, 40, 00, 85, C0, 75, 21, FF, 15, 14, 30, 40, 00, 50, 68, 30, 34, 40, 00, E8, 40, FA, FF, FF, 59, C7, 05, 04, 40, 40, 00, FF, 00, 00, 00, E9, C5, 01, 00, 00, 68, 1C, 34, 40, 00, 68, 0C, 34, 40, 00, FF, 15, 68, 30, 40, 00, 50, FF, 15, 64, 30, 40, 00, 3B...
 
[+]

Entropy:
7.9955

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

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