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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:
Ultra Pronto Installer  (signed by Symbu LLC)

Product:
Ultra Pronto Installer

Version:
57.6.5.4365

MD5:
d62ec77f712cf092dd335036b95f0a5e

SHA-1:
c91101d0fd992653f80caccdd43bc2d28cf6efb4

SHA-256:
0b9c77f1e41318bfc2816524e3b0565b250e498b57edba31f810b481aab62b73

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:
11/15/2024 9:22:36 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Tightrope.Symbu.Bundler (M)
16.7.14.21

File size:
757.5 KB (775,720 bytes)

Product version:
57.6.5.4365

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:
Symbu LLC

Authority:
DigiCert Inc

Valid from:
1/21/2015 7:00:00 AM

Valid to:
1/25/2016 7:00:00 PM

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:
9/14/2014 5:17:07 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
12288:S1Hp3UcOrsy2DCUEtZJoo3YYC8W4RVmgRqd4YTyfG5OJ1+rGBOx3XusBJvsd/D:Si3syaCU1oAX6cIqd4YTye5a1+rGUFVe

Entry address:
0x1EFFB0

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:
7.9219

Packer / compiler:
UPX 2.90LZMA

Code size:
748 KB (765,952 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=Adobe_Reader&country=ID&cb=2034750002&filename=Update.exe&productKey=p2zbf7i5xu6eoixozfcjnlwg7ugshtj2&osName=Windows&osVersion=7&browserName=IE&browserVersion=7&zTmp=1&executable=1191457

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