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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 17 anti-malware scanners. 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:
2.1.0.5

MD5:
6a2eb1f17c717444a1e3f75eae252023

SHA-1:
45742a8c9a53d9a2d906c46363494442fb39c673

SHA-256:
2ce3bad05574a5b3b27c25a22e5729437468a511229f863431b7205432c0f563

Scanner detections:
17 / 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:
5/10/2024 12:07:08 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.Generic.535241
387

Agnitum Outpost
Riskware.Agent
7.1.1

avast!
Win32:Adware-AJR [PUP]
2014.9-160114

Baidu Antivirus
Trojan.Win32.KBM
4.0.3.16114

Bitdefender
Adware.Generic.535241
1.0.20.70

Dr.Web
Adware.Downware.662
9.0.1.014

Emsisoft Anti-Malware
Adware.Generic.535241
8.16.01.14.10

ESET NOD32
Win32/KBM (variant)
10.7892

F-Secure
Adware.Generic.535241
11.2016-14-01_5

G Data
Adware.Generic.535241
16.1.24

IKARUS anti.virus
PUA.KBM
t3scan.1.8.3.0

Malwarebytes
PUP.AdBundle
v2016.01.14.10

MicroWorld eScan
Adware.Generic.535241
17.0.0.42

NANO AntiVirus
Trojan.Win32.Plugin.bbavyu
0.26.0.55532

Reason Heuristics
PUP.Yontoo.sterkly.Installer (M)
16.1.14.10

Trend Micro House Call
TROJ_GEN.F47V1201
7.2.14

VIPRE Antivirus
sterkly LLC
34702

File size:
532.6 KB (545,400 bytes)

Product version:
2.1.0.5

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:
1/8/2013 3:15:58 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:OPSh8RbmElZtwKZn7dkoXYJhW32oiJ6kZ/ocGQtF:OPSMms7koXR32oSLZAcGQtF

Entry address:
0x397CB

Entry point:
E8, A3, 6C, 00, 00, E9, 89, FE, FF, FF, 3B, 0D, D0, FB, 46, 00, 75, 02, F3, C3, E9, 2A, 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, 6E, 33, 00, 00, 6A, 16, 5E, 89, 30, E8, 01, 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, FB, 6D, 00, 00, 83, C4, 0C, EB, C7, FF, 75, 0C, 6A, 00, FF, 75, 08, E8, 49, 2F, 00, 00, 83, C4, 0C, 83, 7D, 10, 00, 74, BB, 39, 75, 0C, 73, 0E, E8, 24, 33, 00, 00, 6A...
 
[+]

Entropy:
6.2706

Code size:
339 KB (347,136 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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