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. The file has been seen being downloaded from files4.fastdownload6.com.
Publisher:
Flashy Pro Install  (signed by Symbu LLC)

Product:
Flashy Pro Install

Version:
81.5.2.792

MD5:
3c2a07199dce4c6dfb1a610504f893bc

SHA-1:
fc7234e1174d0ece7e55812abf00a48741bb28b1

SHA-256:
6c7da3f3ff7627415b5be7a2f44e0a5a27240477039da752365152e287982abc

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 also known as bundleware, or downloadware, which is an downloader designed to simply deliver ad-supported offers in the setup routine of an otherwise legitimate software.

Analysis date:
5/27/2020 2:53:23 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Tightrope (M)
17.1.23.7

File size:
756.5 KB (774,704 bytes)

Product version:
81.5.2.792

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 9:00:00 PM

Valid to:
1/25/2016 9:00:00 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:
9/13/2014 12:51:23 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

Entry address:
0x1EFAF0

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:
7.9226

Packer / compiler:
UPX 2.90LZMA

Code size:
744 KB (761,856 bytes)

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

http://files4.fastdownload6.com/download/.../dl?bc=1126566&pid=updateadmin&brand=updateadmin.com&c=Mozilla_Firefox&country=PH&cb=-2121332106&filename=Update.exe&productKey=rqgh5ntbcrlj425ahd6g4ttjwuu6p4rv&osName=Windows&osVersion=7&browserName=IE&browserVersion=7&zTmp=1&executable=1191457

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