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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 10 anti-malware scanners. This is a setup and installation application and has been known to bundle potentially unwanted software. 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:
2011.9.30.1548

MD5:
7162ec99adb6f4acba194f8284f0d7d1

SHA-1:
990ca06223d2592c57cec2b53c7d69d0dde76ddc

SHA-256:
62f08b2751712aec6b804a7c60a47bc518086cafe13a104a02ad9e4ce6501a86

Scanner detections:
10 / 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:
4/24/2024 8:27:33 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Adware.Generic
7.1.1

Avira AntiVirus
ADWARE/Yontoo.Gen2
7.11.179.110

Baidu Antivirus
Adware.Win32.Yontoo
4.0.3.14121

Comodo Security
UnclassifiedMalware
19832

Dr.Web
Adware.Plugin.11
9.0.1.0335

ESET NOD32
Win32/Adware.Yontoo (variant)
8.10581

NANO AntiVirus
Riskware.Win32.Siggen.cyptve
0.28.2.62671

Reason Heuristics
PUP.Installer.Alactro.Y
14.12.1.22

VIPRE Antivirus
Yontoo
34026

ViRobot
Backdoor.Win32.A.Hupigon.1413152
2011.4.7.4223

File size:
1.1 MB (1,106,856 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 2:13:23 PM

Valid to:
5/26/2012 2:13:23 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:
3/10/2011 7:55:28 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
24576:GbfU+8/nQJEe48lCdrILISKLGSvtFooJomB3L7IRlcP:HJ/QJJjqrS4GSIHmB77Is

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...
 
[+]

Entropy:
7.9964

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

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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