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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:
2012.8.10.1555

MD5:
81f9b006ebbc98b1eb1506aa69e896c4

SHA-1:
e5bf96a3b233aabcccdf3b6b1b6c8a3326f8a882

SHA-256:
ad0d1998ee4d81dff0dbf93dde6318bdc04784929704ad122efbd7d02ba2a464

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:
4/18/2024 9:03:45 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
4.0.3.131127

Boost by Reason
Optional.Yontoo.N
188838

Comodo Security
UnclassifiedMalware
17332

Dr.Web
Adware.Siggen.24249
9.0.1.0240

ESET NOD32
Win32/Adware.Yontoo (variant)
7.9087

IKARUS anti.virus
AdWare.Yontoo
t3scan.2.2.29

Malwarebytes
PUP.Optional.Yontoo.A
v2013.12.24.12

MicroWorld eScan
Adware/Yontoo.E.1
14.0.0.1089

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
23.00.65.131125

Trend Micro House Call
TROJ_FAKEAV.BMC
7.2.358

Trend Micro
TROJ_FAKEAV.BMC
10.465.24

VIPRE Antivirus
Yontoo
23700

File size:
1 MB (1,055,696 bytes)

Product version:
1.10.02

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 4:00:00 PM

Valid to:
12/6/2012 3:59:59 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 6:55:32 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
24576:vtmwoHQQQ5ZYMVmtT/yRf5BVYH8w3zmPFb3sr:FdEoYMc/cyX3qNzsr

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:
7.9956

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

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