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strongsignaluninstaller.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 strongsignaluninstaller.exe by Strong Signal 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. The file has been seen being downloaded from cdn.mystrongsignal.com.
Publisher:
Strong Signal  (signed and verified)

Version:
2.0.5568.6490

MD5:
710d4ce7b78065c4f16ca30e0cb3c8ba

SHA-1:
c9b2b03fc5937456db28be32ff30ae8773719b8d

SHA-256:
5f979170032ce93c342344f491ca6a9c48be0aa26dfa815ed60bbcda9e53019f

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:
5/19/2024 8:25:08 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.StrongSignal.Installer (M)
16.2.5.4

File size:
304.2 KB (311,480 bytes)

Product version:
2015.03.31

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
English (United States)

Common path:
C:\users\{user}\downloads\strongsignaluninstaller.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:HQ3VJznM3DoFFjuvf/toNQ8dqLuJoU0U7Hd8CntQOHHM+HFFTjXdpNnT28c:wJznM3D0Fw/tN8dkmLtpHHHrh7pc

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:
7.9326

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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

http://cdn.mystrongsignal.com/.../ud

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