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yontoosetup.exe

Yontoo

Yontoo LLC

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application yontoosetup.exe has been detected as adware by 2 anti-malware scanners. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from dl.yontoo.com.
Publisher:
Yontoo LLC

Product:
Yontoo

Description:
Installer

Version:
2013.3.22.1900

MD5:
b767e07dadacbc504f8e901a6c37d094

SHA-1:
70e1e1dc063cdef7012dd823d63bcf970eda84fd

SHA-256:
29dfe3331fb7e201e310d0f7b46ede6a705ebd9714c3f3dc831eb77cb2264fe1

Scanner detections:
2 / 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:
4/20/2024 6:19:29 AM UTC  (today)

Scan engine
Detection
Engine version

Boost by Reason
Optional.Yontoo
188838

Reason Heuristics
Win32.Generic
16.2.4.11

File size:
1 MB (1,100,312 bytes)

Product version:
2.051

Copyright:
Copyright (c) 2013 Yontoo LLC. All rights reserved.

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

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

File PE Metadata
Compilation timestamp:
3/10/2011 8:55:32 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
12288:rAnzFk1A5AavP34U0ZpF5Oy4qm0gDL/CdRXtEd:rtQP3j0L63qxgfitE

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:
4.8665

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

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

http://dl.yontoo.com/Install/.../yontoosetup.exe

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