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webxvid.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 webxvid.exe by Best Download Manager has been detected as adware by 9 anti-malware scanners. It is also typically executed from the user's temporary directory.
Publisher:
Best Download Manager   (signed by Best Download Manager)

Product:
KBM2 Installer

Version:
2.5.1.0

MD5:
bd4748a4ec8e43bf84e865827d73e9bd

SHA-1:
1d3978353f9b0683b635b92f49f5584abdc7af4d

SHA-256:
4e6cad4a7b56b5f55d9e8b50d584d34a151c1befe00637aa11ecdb91f01bb763

Scanner detections:
9 / 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:
5/3/2024 1:48:17 AM UTC  (today)

Scan engine
Detection
Engine version

AVG
AdInject.Bdmngr
2015.0.3573

Bkav FE
W32.Clod38d.Trojan
1.3.0.4923

Dr.Web
Adware.Plugin.85
9.0.1.035

ESET NOD32
Win32/KBM (variant)
8.9325

herdProtect (fuzzy)
variant of unziplite.exe (Adware)
2014.4.6.6

McAfee
Artemis!BD4748A4EC8E
5600.7229

Reason Heuristics
PUP.Installer.BestDownloadManager.H
14.8.8.0

Trend Micro House Call
TROJ_GEN.F47V0902
7.2.35

VIPRE Antivirus
sterkly LLC
25696

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)

Common path:
C:\users\{user}\appdata\local\temp\webxvid.exe

Digital Signature
Signed by:
Best Download Manager

Authority:
VeriSign, Inc.

Valid from:
7/25/2013 3:00:00 AM

Valid to:
7/26/2015 2:59:59 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 10:25:15 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:/gq6uX5c0RzWguzZylIAllGVytvHdKme7IZopYgQfV:/R610ZluglqytYmesZovQt

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:
6.1799

Code size:
342.5 KB (350,720 bytes)

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