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nszf537.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 nszf537.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.reasoninghollow.com and multiple other hosts.
Publisher:
Site on Spot Limited  (signed and verified)

Version:
1.0.0.1

MD5:
1fc81e3bf84f7ff252f0efc1470bf85f

SHA-1:
16cd580762f8c9718ff9e5e28a14f8f80908fe6e

SHA-256:
283e588d4dca99a4c91fc1535c9c6c1f4246a120cd60de5e2a9f9aec6baf7407

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:
12/26/2024 3:33:46 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Somoto.SiteonSpot.Bundler (M)
15.6.20.19

File size:
418.2 KB (428,248 bytes)

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

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\temp\nszf537.tmp

Digital Signature
Signed by:
Site on Spot Limited

Authority:
thawte, Inc.

Valid from:
1/28/2015 3:00:00 AM

Valid to:
7/10/2015 2:59:59 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 1:50:46 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
6144:wsxFWJMzq0W7cR9mKur+19nIMlmy7F/+VUVL9fH/taNCDJaZXSuYU/Zku6:pFWh89K61Scb7h+kLdftaA1aIUD6

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:
7.9408

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file nszf537.tmp has been seen being distributed by the following 2 URLs.

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

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

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