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steelcutuninstall.exe

Steel Cut

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application steelcutuninstall.exe by Steel Cut has been detected as adware by 8 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.
Publisher:
Steel Cut  (signed and verified)

MD5:
55cbfdd2bc38430c09cd9cb2d241ebb1

SHA-1:
6e303d4d5d2ff5d76906f2c1fb6a1e18b729ac28

SHA-256:
8db7121f7f3fb8997be4c00d55cab0ae024749734fedf254936989e223d4f1d2

Scanner detections:
8 / 68

Status:
Adware

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

Analysis date:
4/19/2024 9:45:08 PM UTC  (today)

Scan engine
Detection
Engine version

AhnLab V3 Security
PUP/Win32.BrowseFox
2015.04.21

Avira AntiVirus
ADWARE/BrowseFox.Gen4
3.6.1.96

AVG
Generic
2016.0.3133

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.15421

Bkav FE
W32.HfsAdware
1.3.0.6379

Dr.Web
Trojan.Yontoo.1734
9.0.1.05190

NANO AntiVirus
Trojan.Nsis.BrowseFox.dnxihk
0.30.20.1219

Reason Heuristics
Threat.Yontoo.Installer
15.4.21.3

File size:
242.1 KB (247,944 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\Program Files\steel cut\steelcutuninstall.exe

Digital Signature
Signed by:
Steel Cut

Authority:
VeriSign, Inc.

Valid from:
1/11/2015 10:00:00 AM

Valid to:
1/12/2016 9:59:59 AM

Subject:
CN=Steel Cut, O=Steel Cut, 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:
0ABB826DEFFE019B3B61D91322DE992A

File PE Metadata
Compilation timestamp:
12/6/2009 8:52:01 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
6144:LZ+11O4y/1RWBT5Eaz5SiEWOijwZm/G/Hcj/:j4s1s15b5SiEUp/G/8L

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...
 
[+]

Entropy:
7.8570

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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