webcake.exe

KBM2 Installer

sterkly LLC

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application webcake.exe by sterkly has been detected as adware by 8 anti-malware scanners. The file has been seen being downloaded from api.kbm2.com.
Publisher:
sterkly LLC  (signed and verified)

Product:
KBM2 Installer

Version:
2.5.1.0

MD5:
cf353635510d9f37b275197e4527d007

SHA-1:
4190a801516015fe6f6b2ae72a5a2d183eb06714

SHA-256:
5ac07ea135af2d6cfad4fd5bd64729f2f6af43cc224eafdc4b6383d7a7bf6583

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:
4/25/2024 9:50:29 AM UTC  (today)

Scan engine
Detection
Engine version

AVG
AdInject.Sterkly
2014.0.3644

Boost by Reason
Adware.Installer.sterkly.H
2013.8.2.9

Dr.Web
Adware.Plugin.85
9.0.1.0214

ESET NOD32
Win32/KBM (variant)
7.8898

McAfee
Artemis!CF353635510D
5600.7154

Reason Heuristics
PUP.Installer.sterkly.H
14.2.28.17

Trend Micro House Call
TROJ_GEN.R047H01GT13
7.2.214

VIPRE Antivirus
sterkly LLC
22236

File size:
541.6 KB (554,616 bytes)

Product version:
2.5.1.0

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\webcake.exe

Digital Signature
Signed by:

Authority:
VeriSign, Inc.

Valid from:
1/21/2013 4:00:00 PM

Valid to:
2/21/2015 3:59:59 PM

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:
113C6B2C72DEF110BE64B2ABBC52861E

File PE Metadata
Compilation timestamp:
7/25/2013 10:15:04 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

Entry address:
0x3A3C0

Code size:
342.5 KB (350,720 bytes)

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

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