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brasssearch.dll

Brass Search

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module brasssearch.dll by Brass Search has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from install-cdn.brass-search.net.
Publisher:
Brass Search  (signed and verified)

Product:
Brass Search

Version:
1.0.0.3

MD5:
a75166378b641dae2aa4420e6a283156

SHA-1:
40010a987af67eeea991f7a1d204d63f109b6020

SHA-256:
dfc72eb8afdd273a7a777d416ebf7d0568590818c6df3cc910e4f6ce44f8fbca

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:
5/3/2024 11:30:09 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.BrassSea (M)
16.4.22.0

File size:
244.8 KB (250,664 bytes)

Product version:
1.0.0.3

Copyright:
(c) Brass Search. All rights reserved.

Original file name:
Brass SearchIEClient.dll

File type:
Dynamic link library (Win32 DLL)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\brasssearch.dll

Digital Signature
Signed by:
Brass Search

Authority:
VeriSign, Inc.

Valid from:
3/14/2014 1:00:00 AM

Valid to:
3/15/2015 12:59:59 AM

Subject:
CN=Brass Search, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Brass Search, 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:
79A7A4116AA48D85E401C00C69AD38D7

File PE Metadata
Compilation timestamp:
11/10/2014 2:36:55 AM

OS version:
6.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:rrCoqi7Zcx83Z2qJC0SzN+3au4id15+EaxIaIIQTm8LE:rqi7ZcG3BCRecxIfS8LE

Entry address:
0x12854

Entry point:
55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, 41, 8D, 00, 00, FF, 75, 10, FF, 75, 0C, FF, 75, 08, E8, 07, 00, 00, 00, 83, C4, 0C, 5D, C2, 0C, 00, 6A, 0C, 68, 90, 30, 03, 10, E8, BD, 01, 00, 00, 33, C0, 40, 8B, 75, 0C, 85, F6, 75, 0C, 39, 35, 44, 78, 03, 10, 0F, 84, E4, 00, 00, 00, 83, 65, FC, 00, 83, FE, 01, 74, 05, 83, FE, 02, 75, 35, 8B, 0D, 1C, A5, 02, 10, 85, C9, 74, 0C, FF, 75, 10, 56, FF, 75, 08, FF, D1, 89, 45, E4, 85, C0, 0F, 84, B1, 00, 00, 00, FF, 75, 10, 56, FF, 75, 08, E8, 11, FE, FF, FF, 89, 45, E4...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
159 KB (162,816 bytes)

The file brasssearch.dll has been seen being distributed by the following URL.

http://install-cdn.brass-search.net/bed?bet=3

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