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handbrakesetup.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 handbrakesetup.exe by Best Download Manager has been detected as adware by 12 anti-malware scanners. During install, it bundles potentially unwanted software on a user's computer at the same time without adequate consent. 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:
e062bb3e2f8a6f30f9e8073e2d221687

SHA-1:
2061ab728d7d1cf63fe0f857d27edb7de34ca675

SHA-256:
c49618f834dc4a36aa5bcbc3c23eb7b90a4847485fe6d4535145d792ef9b49d0

Scanner detections:
12 / 68

Status:
Adware

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

Analysis date:
4/25/2024 4:58:03 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Riskware.Agent
7.1.1

AVG
AdInject.Bdmngr
2015.0.3283

Dr.Web
Adware.Plugin.85
9.0.1.0326

ESET NOD32
Win32/KBM (variant)
8.10655

Fortinet FortiGate
Riskware/KBM
11/22/2014

G Data
Win32.Application.Kbm
14.11.24

IKARUS anti.virus
PUA.KBM
t3scan.1.8.3.0

Malwarebytes
PUP.Optional.BundleInstaller.A
v2014.11.22.06

McAfee
Artemis!E062BB3E2F8A
5600.6939

NANO AntiVirus
Riskware.Win32.Plugin.cxiows
0.28.6.62995

Reason Heuristics
PUP.Installer.BestDownloadManager.O
14.11.22.6

VIPRE Antivirus
sterkly LLC
34432

File size:
541.6 KB (554,632 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\handbrakesetup.exe

Digital Signature
Signed by:
Best Download Manager

Authority:
VeriSign, Inc.

Valid from:
7/25/2013 1:00:00 AM

Valid to:
7/26/2015 12:59:59 AM

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 8:25:15 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:Hgq6uX5c0RzWguzZylIAllGVytvHdKme7IZopYnQA8:HR610ZluglqytYmesZoMQL

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:
6.2548

Code size:
342.5 KB (350,720 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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