update_27.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_27.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. The file has been seen being downloaded from files4.fastdownload6.com.
Publisher:
Program Developed Install System  (signed by Symbu LLC)

Product:
Program Developed Install System

Version:
77.1.3.696

MD5:
7020595e998cbe74bd0ab1565fc8aaa8

SHA-1:
195e111cb7fe8f75dfc030b0d30259fa3490d5b1

SHA-256:
dbbb4195cbb81ea733ed96a170de412b0eff2498943872708b6e1d55950bfe7a

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:
5/27/2020 2:17:02 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Tightrope (M)
16.12.5.22

File size:
757.1 KB (775,240 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\update_27.exe

Digital Signature
Signed by:

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:
8/11/2014 3:01:09 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
12288:aYJWtoEksHrx0lYx/MYzLYpBh9HzfjBtQTM+UYGYeCnjuaprtdUtsRtcOEs7b/ol:acfEPLx+YWYzLiBTHzfj3ohDe4juaJtK

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...
 
[+]

Packer / compiler:
UPX 2.90LZMA

Code size:
744 KB (761,856 bytes)

The file update_27.exe has been seen being distributed by the following URL.

http://files4.fastdownload6.com/download/.../dl?bc=1126566&pid=updateadmin&brand=updateadmin.com&aid=081915&s=kmp&c=Internet_Explorer&country=ID&cb=-934414397&filename=Update.exe&productKey=5c7mxbb4lbhsizzvmuk5eblckgzzw3m7&osName=Windows&osVersion=7&browserName=IE&browserVersion=7&zTmp=1&executable=1191457

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