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vlcsetup.exe

KBM2 Installer

Best Download Manager

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application vlcsetup.exe by Best Download Manager has been detected as adware by 10 anti-malware scanners. During install, it bundles potentially unwanted software on a user's computer at the same time without adequate consent. The file has been seen being downloaded from api.kbm2.com. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.
Publisher:
Best Download Manager   (signed by Best Download Manager)

Product:
KBM2 Installer

Version:
2.5.1.0

MD5:
ebf6d0316d83b8c594867b9e98aee429

SHA-1:
84d81f6d9ce044675210be50e567c5b8f916bc47

SHA-256:
b4c94641213cfa0d97efb5017e0ce2634c0d70abb329686d41f93d38fdb67308

Scanner detections:
10 / 68

Status:
Adware

Explanation:
May bundle additional potentially unwanted software such as adware during setup.

Analysis date:
12/23/2024 11:20:45 PM UTC  (a few moments ago)

Scan engine
Detection
Engine version

Agnitum Outpost
Riskware.Agent
7.1.1

AVG
AdInject.Bdmngr
2015.0.3519

Dr.Web
Adware.Plugin.85
9.0.1.089

ESET NOD32
Win32/KBM (variant)
8.9308

Fortinet FortiGate
Riskware/MultiPlug
4/9/2014

Malwarebytes
PUP.Optional.BundleInstaller.A
v2014.04.09.12

McAfee
Artemis!EBF6D0316D83
5600.7175

Reason Heuristics
PUP.Installer.BestDownloadManager.I
14.8.8.0

Trend Micro House Call
TROJ_GEN.F47V1216
7.2.89

VIPRE Antivirus
sterkly LLC
25568

File size:
537.1 KB (550,024 bytes)

Product version:
2.5.1.0

Copyright:
(c) Best Download Manager . All rights reserved.

Original file name:
KBM2.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

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

Digital Signature
Signed by:
Best Download Manager

Authority:
VeriSign, Inc.

Valid from:
7/24/2013 6:00:00 PM

Valid to:
7/25/2015 5:59:59 PM

Subject:
CN=Best Download Manager, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Best Download Manager, 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:
5F3BBF9CAABCE7C81AB69ABF7371A064

File PE Metadata
Compilation timestamp:
8/7/2013 1:25:15 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:Jgq6uX5c0RzWguzZylIAllGVytvHdKme7IZopYjRQDp:JR610ZluglqytYmesZoYRQl

Entry address:
0x3A3C0

Entry point:
E8, 0E, 6F, 00, 00, E9, 89, FE, FF, FF, 3B, 0D, D0, 0B, 47, 00, 75, 02, F3, C3, E9, 95, 6F, 00, 00, 8B, FF, 55, 8B, EC, 56, 8B, 75, 14, 85, F6, 75, 04, 33, C0, EB, 61, 83, 7D, 08, 00, 75, 13, E8, D9, 35, 00, 00, 6A, 16, 5E, 89, 30, E8, 6C, 75, 00, 00, 8B, C6, EB, 48, 83, 7D, 10, 00, 74, 16, 39, 75, 0C, 72, 11, 56, FF, 75, 10, FF, 75, 08, E8, 66, 70, 00, 00, 83, C4, 0C, EB, C7, FF, 75, 0C, 6A, 00, FF, 75, 08, E8, B4, 31, 00, 00, 83, C4, 0C, 83, 7D, 10, 00, 74, BB, 39, 75, 0C, 73, 0E, E8, 8F, 35, 00, 00, 6A...
 
[+]

Entropy:
6.2710

Code size:
342.5 KB (350,720 bytes)

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

http://api.kbm2.com/downloadLauncher.ashx?cid=1194

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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