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browsemark_setup.exe

BrowseMark

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application browsemark_setup.exe by BrowseMark has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It is also typically executed from the user's temporary directory. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.
Publisher:
BrowseMark  (signed and verified)

MD5:
c62059a067d9bcd8b4e9c9c18fe70f83

SHA-1:
7c3f4506ccf1f0ee107931769301bbdab2df4fbe

SHA-256:
391dc24a6772f2f555106c52fc83c29e36c33bc4682e5ebc991c453f30da1a24

Scanner detections:
1 / 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:
4/19/2024 8:29:20 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.6.1

File size:
2 MB (2,116,872 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\browsemark_setup.exe

Digital Signature
Signed by:
BrowseMark

Authority:
VeriSign, Inc.

Valid from:
2/4/2014 2:00:00 AM

Valid to:
2/5/2015 1:59:59 AM

Subject:
CN=BrowseMark, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=BrowseMark, L=Santa Monica, 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:
61D3176BC90758B1B3F2AF5F8E4B7075

File PE Metadata
Compilation timestamp:
12/6/2009 12:52:01 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 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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