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5c01473a_stp.exe

Strong Signal

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application 5c01473a_stp.exe by Strong Signal has been detected as adware by 11 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages. It is also typically executed from the user's temporary directory.
Publisher:
Strong Signal  (signed and verified)

Version:
2.0.5560.4679

MD5:
a33238db3a00087482e8c366d9081b9e

SHA-1:
90e3331c9dea5afd8ec15456fab070ba9a590156

SHA-256:
fbfd1b8ca84d4ca4de528bb902bcedd44f4073641da0dba991227693d4103d54

Scanner detections:
11 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
2/7/2026 11:30:59 PM UTC  (a few moments ago)

Scan engine
Detection
Engine version

AVG
Generic
2016.0.3161

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.15323

Bkav FE
W32.HfsAdware
1.3.0.6379

Dr.Web
Trojan.Yontoo.1735
9.0.1.05190

G Data
Win32.Adware.StrongSignal
15.3.25

herdProtect (fuzzy)
variant of uninstaller.exe (Adware)
2015.6.28.13

Qihoo 360 Security
HEUR/QVM42.0.Malware.Gen
1.0.0.1015

Reason Heuristics
PUP.Installer.Yontoo
15.3.23.13

Vba32 AntiVirus
suspected of Trojan.Downloader.gen.h
3.12.26.3

VIPRE Antivirus
Threat.4741131
38552

File size:
292.3 KB (299,272 bytes)

Product version:
2015.03.23

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\5c01473a_stp.exe

Digital Signature
Signed by:
Strong Signal

Authority:
VeriSign, Inc.

Valid from:
12/11/2014 7:00:00 PM

Valid to:
12/12/2015 6:59:59 PM

Subject:
CN=Strong Signal, O=Strong Signal, 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:
5047EE0477D4F273DFC93DB8A749B9E0

File PE Metadata
Compilation timestamp:
6/4/2014 7:58:31 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
6144:kQ3uQnM3DoFFjuvf/toNQ8dqLuJoU0U7Hd8CntQOHHM+HFFTjXdpNnT2D:MQnM3D0Fw/tN8dkmLtpHHHrh7Q

Entry address:
0x31E4

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, E0, 73, 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, B8, 6C, 44, 00, E8, 1B, 25, 00, 00, 53, 68, 60, 01, 00, 00, A3, C0, 6B, 44, 00, 8D, 44, 24, 38, 50, 53, 68, DB, 73, 40, 00, FF, 15, 58, 71, 40, 00, 68, D0, 73, 40, 00, 68, C0, 2B, 44, 00, E8, 0D, 24, 00, 00, FF, 15, AC, 70, 40, 00, 50, BF, 00, F0, 46, 00, 57, E8, FB, 23, 00, 00...
 
[+]

Entropy:
7.9346

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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