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chrome-update.exe

Zoobam

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 chrome-update.exe by Zoobam 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 installer is marketed through download protals and search ads as Google's Chrome web browser but will also install additional software offers which include adware, PUPs and browser toolbars.
Publisher:
Zoobam  (signed and verified)

MD5:
1466f198872d8799d32bcacad3439a67

SHA-1:
5dc3ee600a752246b74c555f02001fc624135433

SHA-256:
513ab03872c15077f56d5262df284d30c0da051e4099c4e92977d7839fb44c8e

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:
5/29/2024 7:31:08 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Tightrope (M)
16.7.24.9

File size:
826.1 KB (845,952 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
Tightrope WebInstall (using Nullsoft Install System)

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\chrome-update.exe

Digital Signature
Signed by:
Zoobam

Authority:
GoDaddy.com, Inc.

Valid from:
10/15/2014 10:27:59 PM

Valid to:
10/15/2017 10:27:59 PM

Subject:
CN=Zoobam, O=Zoobam, L=Kirkland, S=Washington, C=US

Issuer:
CN=Go Daddy Secure Certificate Authority - G2, OU=http://certs.godaddy.com/repository/, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US

Serial number:
4EA9D31E75E043

File PE Metadata
Compilation timestamp:
7/15/2014 12:29:31 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:uxpJfslZtuaVd9lpmhwQbift489IVGD4xJFl6Xqb5Kbmkg8SU:ap9sVuaVdvgVbmgGDijyikg5

Entry address:
0x3345

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, B0, 73, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, C0, 70, 40, 00, 53, FF, 15, 88, 72, 40, 00, 6A, 08, A3, B8, 3C, 42, 00, E8, 2E, 25, 00, 00, 53, 68, 60, 01, 00, 00, A3, C0, 3B, 42, 00, 8D, 44, 24, 38, 50, 53, 68, 43, 74, 40, 00, FF, 15, 64, 71, 40, 00, 68, 38, 74, 40, 00, 68, C0, 33, 42, 00, E8, 1F, 24, 00, 00, FF, 15, BC, 70, 40, 00, 50, BF, 00, 90, 42, 00, 57, E8, 0D, 24, 00, 00...
 
[+]

Entropy:
7.4931

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

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

http://download7.file-mirror.org/.../chrome-popup.php

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