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mi55bc.tmp

search maven

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file mi55bc.tmp by search maven 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. The file has been seen being downloaded from install-cdn.searchmaven.co.
Publisher:
search maven  (signed and verified)

MD5:
9e93a82ca46b8106526bf151ea1e287e

SHA-1:
501507060195d74055f57671639ac0ad4bf68c1d

SHA-256:
0fb0903fc95544c009300878d9efe6690fb8e425d2c32e2d4e0089af7f308ee2

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:
8/2/2025 12:19:50 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.searchmaven.Installer (M)
16.1.9.20

File size:
464.8 KB (475,936 bytes)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\mi55bc.tmp

Digital Signature
Signed by:
search maven

Authority:
VeriSign, Inc.

Valid from:
1/4/2015 10:00:00 PM

Valid to:
3/5/2016 8:59:59 PM

Subject:
CN=search maven, O=search maven, L=San Diego, 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:
57468DE05C8E41954C656D2F33AC8438

File PE Metadata
Compilation timestamp:
12/5/2009 8:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:nIwe0qfsA21s15Ap/G/8/3D0Fw/tN8dkmLtpHHHrh7h:n60qfg6j8/z0FmcLbH1h

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 file mi55bc.tmp has been seen being distributed by the following URL.

http://install-cdn.searchmaven.co/sd?is=mi

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