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instsf450.exe

Download.com Installer

Spigot, Inc.

This component is part of the Spigot browser add-on, a web browser addition that is designed to modify the core search provider in order to redirect search queries through partner portals. The application instsf450.exe by Spigot 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 Spigot Setup installer. The file has been seen being downloaded from download.cnet.com.
Publisher:
Download.com  (signed by Spigot, Inc.)

Product:
Download.com Installer

Version:
1.0.0.19

MD5:
8f90fe94c858e94b9b5bbf9b330cff9f

SHA-1:
8fc49c5672513384520051cde63e86b52db2a261

SHA-256:
cba72420d9410d9d0f547520989feb47ead3f66f772ba750a25296cb050e5993

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Analysis date:
12/25/2024 8:04:10 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Spigot (M)
16.12.27.11

File size:
229.4 KB (234,904 bytes)

Product version:
1.0.0.19

Copyright:
(c) 2014 Download.com. All rights reserved.

Original file name:
CnetStub.exe

File type:
Executable application (Win32 EXE)

Installer:
Spigot Setup

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\instsf450.exe

Digital Signature
Signed by:
Spigot, Inc.

Authority:
DigiCert Inc

Valid from:
11/19/2014 4:00:00 PM

Valid to:
11/22/2017 4:00:00 AM

Subject:
CN="Spigot, Inc.", O="Spigot, Inc.", L=Incline Village, S=Nevada, C=US, PostalCode=89451, STREET="554 Mays Blvd. #10-456", SERIALNUMBER=E0212222011-9, OID.1.3.6.1.4.1.311.60.2.1.2=Nevada, OID.1.3.6.1.4.1.311.60.2.1.3=US, OID.2.5.4.15=Private Organization

Issuer:
CN=DigiCert EV Code Signing CA (SHA2), OU=www.digicert.com, O=DigiCert Inc, C=US

Serial number:
0E22C73A7CB0A3988AA00FE82072E3F0

File PE Metadata
Compilation timestamp:
12/5/2009 2:50:46 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x323C

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 58, 3F, 42, 00, E8, 09, 2C, 00, 00, A3, A4, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 58, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, B8, 91, 40, 00, 68, A0, 36, 42, 00, E8, BC, 28, 00, 00, FF, 15, B0, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, AA, 28, 00, 00...
 
[+]

Entropy:
7.0501

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file instsf450.exe has been seen being distributed by the following URL.

http://download.cnet.com/.../?appid=10067444

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