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bestvideodownloadersetup.exe

Best Video Downloader

Alactro 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 bestvideodownloadersetup.exe by Alactro has been detected as adware by 8 anti-malware scanners. This is a self-extracting archive and installer and has been known to bundle potentially unwanted software. The file has been seen being downloaded from nasvete.net. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.
Publisher:
Alactro LLC  (signed and verified)

Product:
Best Video Downloader

Description:
Installer

Version:
2011.10.11.1654

MD5:
aa462a7d4cea7d6336c937ae922b7c44

SHA-1:
c28b1977ed1ae88ff0db21b08d6f905e290ec095

SHA-256:
10d76a33b909e721fba7aeafe224827ba51724ca01df661dfd807a0c3303d941

Scanner detections:
8 / 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:
4/25/2024 10:32:41 AM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/Yontoo.Gen2
7.11.106.104

Baidu Antivirus
Trojan.Adware.Win32.Yontoo
4.0.3.141019

Comodo Security
UnclassifiedMalware
17074

Dr.Web
Adware.Plugin.8
9.0.1.0292

ESET NOD32
Win32/Adware.Yontoo (variant)
8.8892

NANO AntiVirus
Trojan.Win32.Siggen.bxavkd
0.26.0.55366

Reason Heuristics
PUP.Installer.Alactro.Y
14.10.19.5

VIPRE Antivirus
Yontoo
22210

File size:
1.1 MB (1,107,240 bytes)

Product version:
1.00

Copyright:
Copyright (c) 2011 Alactro LLC. All rights reserved.

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\bestvideodownloadersetup.exe

Digital Signature
Signed by:
Alactro LLC

Authority:
GoDaddy.com, Inc.

Valid from:
5/26/2011 11:13:23 PM

Valid to:
5/26/2012 11:13:23 PM

Subject:
CN=Alactro LLC, O=Alactro LLC, L=Carlsbad, S=CA, C=US

Issuer:
SERIALNUMBER=07969287, CN=Go Daddy Secure Certification Authority, OU=http://certificates.godaddy.com/repository, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US

Serial number:
27E40C73BA04BA

File PE Metadata
Compilation timestamp:
3/11/2011 3:55:28 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
24576:nbfU+mjcc8w8tFhkR2AnoEwWroAVGBgyNQks6kgIpMQhVUWfUb:4xjcBwGU2AnuWroBBDzs6I/HzfI

Entry address:
0x15B4

Entry point:
55, 8B, EC, 81, EC, CC, 05, 00, 00, 53, 56, 33, DB, 57, C6, 85, 34, FA, FF, FF, 00, 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, 3C, FE, FF, FF, 50, C7, 85, 3C, FE, FF, FF, 94, 00, 00, 00, FF, 15, 6C, 30, 40, 00, 85, C0, 75, 21, FF, 15, 14, 30, 40, 00, 50, 68, A8, 32, 40, 00, E8, 36, FA, FF, FF, 59, C7, 05, 04, 40, 40, 00, FF, 00, 00, 00, E9, 20, 02, 00, 00, 8B, 35, 68, 30, 40, 00, 68, 94, 32, 40, 00, 68, 84, 32, 40, 00, FF, D6, 50, FF, 15, 64, 30, 40...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

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

http://nasvete.net/soft/.../best-video-downloader-1.6.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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