update.exe

Symbu LLC

This is the Tightrope WebInstall which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed with minimal consent. The application update.exe by Symbu 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 Tightrope WebInstall installer. It is also typically executed from an Internet Explorer cache folder.
Publisher:
Program Developed Install System  (signed by Symbu LLC)

Product:
Program Developed Install System

Version:
77.1.3.696

MD5:
550dc9f274a244d9878d199a532bd3f8

SHA-1:
b2bf694f906055ca9fd4853c109fac6e3f78a3ff

SHA-256:
d354ef83368e9e1ee62c8c8f046afcce9b3339a4849cfe8f00aa720ca339c596

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 is an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
5/27/2020 3:18:03 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Tightrope (M)
17.3.8.23

File size:
757 KB (775,216 bytes)

Product version:
77.1.3.696

Copyright:
Copyright (C) 2015

Original file name:
setup.exe

File type:
Executable application (Win32 EXE)

Bundler/Installer:
Tightrope WebInstall

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\update.exe

Digital Signature
Signed by:

Authority:
DigiCert Inc

Valid from:
1/20/2015 4:00:00 PM

Valid to:
1/25/2016 4:00:00 AM

Subject:
CN=Symbu LLC, O=Symbu LLC, L=San Francisco, S=California, C=US

Issuer:
CN=DigiCert SHA2 Assured ID Code Signing CA, OU=www.digicert.com, O=DigiCert Inc, C=US

Serial number:
090A11C2A200806811FD3F043D627C7E

File PE Metadata
Compilation timestamp:
8/10/2014 1:01:09 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

Entry address:
0x1EFC60

Entry point:
60, BE, 00, 60, 53, 00, 8D, BE, 00, B0, EC, FF, 57, 83, CD, FF, EB, 10, 90, 90, 90, 90, 90, 90, 8A, 06, 46, 88, 07, 47, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 72, ED, B8, 01, 00, 00, 00, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C0, 01, DB, 73, 0B, 75, 28, 8B, 1E, 83, EE, FC, 11, DB, 72, 1F, 48, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C0, EB, D4, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C9, EB, 52, 31, C9, 83, E8, 03, 72, 11, C1, E0, 08, 8A, 06, 46, 83, F0, FF, 74, 75, D1, F8, 89...
 
[+]

Entropy:
7.9224

Packer / compiler:
UPX 2.90LZMA

Code size:
744 KB (761,856 bytes)

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