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nst97a1.tmp

Site on Spot Limited

This is the Somoto BetterInstaller, an installer that bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed without consent. The file nst97a1.tmp by Site on Spot Limited 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 Somoto BetterInstaller installer. It is also typically executed from the user's temporary directory. The file has been seen being downloaded from sub.yosemiterocking.com.
Publisher:
Site on Spot Limited  (signed and verified)

Version:
1.0.0.1

MD5:
6e9a7402b8c0f327bdbd5aec0017db04

SHA-1:
e54c20de922939daf6485469ecf04864b10e6969

SHA-256:
c2f1bfd9e7f513cc3ed1256fcaed98bc9665910b293355a02e0a65840274abf1

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.

Description:
This 'download manager' is also considered bundleware, a utility designed to download software (possibly legitimate or opensource) and bundle it with a number of optional offers including ad-supported utilities, toolbars, shopping comparison tools and browser extensions.

Analysis date:
4/23/2024 4:24:44 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Somoto.SiteonSp.Bundler (M)
16.4.6.8

File size:
418.3 KB (428,312 bytes)

Bundler/Installer:
Somoto BetterInstaller (using Nullsoft Install System)

Common path:
C:\users\{user}\appdata\local\temp\nst97a1.tmp

Digital Signature
Signed by:
Site on Spot Limited

Authority:
thawte, Inc.

Valid from:
1/28/2015 9:00:00 AM

Valid to:
7/10/2015 8:59:59 AM

Subject:
CN=Site on Spot Limited, O=Site on Spot Limited, L=Tel Aviv, S=Israel, C=IL

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
477E336D7B42EDDDED42DABF6FAB572F

File PE Metadata
Compilation timestamp:
12/6/2009 7:50:46 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:pFZl2xjTktgl7HCCFVPLt+d+0vs1wZfQk7p:pFZl2TktgxHJFV8OKd

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:
7.9410

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file nst97a1.tmp has been seen being distributed by the following URL.

http://sub.yosemiterocking.com/installers/bi_downloader/.../setup.exe

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