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vlcsetup.exe

KBM2 Installer

sterkly LLC

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application vlcsetup.exe by sterkly has been detected as adware by 8 anti-malware scanners. 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:
sterkly LLC  (signed and verified)

Product:
KBM2 Installer

Version:
2.1.0.1

MD5:
3fbd9b88c0d7294055efe51076cec6d1

SHA-1:
4692d7651391714d122b42550d8940a573fd9fbc

SHA-256:
cda71b85ca1dbc756d9eb6dcde1eb71e4423d5aa246ca1b0232e8f430ac00365

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:
11/9/2024 12:31:34 AM UTC  (today)

Scan engine
Detection
Engine version

Baidu Antivirus
Trojan.Win32.Agent
4.0.3.14913

Dr.Web
Adware.Plugin.18
9.0.1.0256

ESET NOD32
Win32/KBM (variant)
8.8965

herdProtect (fuzzy)
variant of tubeboxsetup.exe (Adware)
2014.11.9.8

Malwarebytes
PUP.AdBundle
v2014.09.13.09

NANO AntiVirus
Trojan.Win32.Plugin.bavcky
0.26.0.55532

Reason Heuristics
PUP.Installer.sterkly.I
14.9.13.9

VIPRE Antivirus
sterkly LLC
22710

File size:
531.1 KB (543,864 bytes)

Product version:
2.1.0.1

Copyright:
(c) Sterkly LLC. 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:
sterkly LLC

Authority:
VeriSign, Inc.

Valid from:
1/26/2012 5:30:00 AM

Valid to:
1/26/2013 5:29:59 AM

Subject:
CN=sterkly LLC, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=sterkly LLC, 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:
136DB6717AA1462B8176971FE58FEBD6

File PE Metadata
Compilation timestamp:
8/31/2012 2:15:19 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:MMBNfoLYC0LexiXZZ47eHqxeDIq6lWb8rYQZGkyQCe+:MMHbCeYiQ7XxeolW+5ZGkyQZ+

Entry address:
0x391E8

Entry point:
E8, A6, 6C, 00, 00, E9, 89, FE, FF, FF, 3B, 0D, D0, FB, 46, 00, 75, 02, F3, C3, E9, 2D, 6D, 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, 71, 33, 00, 00, 6A, 16, 5E, 89, 30, E8, 04, 73, 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, FE, 6D, 00, 00, 83, C4, 0C, EB, C7, FF, 75, 0C, 6A, 00, FF, 75, 08, E8, 4C, 2F, 00, 00, 83, C4, 0C, 83, 7D, 10, 00, 74, BB, 39, 75, 0C, 73, 0E, E8, 27, 33, 00, 00, 6A...
 
[+]

Entropy:
6.2636

Code size:
337.5 KB (345,600 bytes)

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

http://api.kbm2.com/downloadLauncher.ashx?cid=46

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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