1. Home
  2. Software
  3. Bundlore

Bundlore

Bundlore is adware written for macOS that has been in use since at least 2015. Though categorized as adware, Bundlore has many features associated with more traditional backdoors.[1]

ID: S0482
ⓘ
Associated Software: OSX.Bundlore
ⓘ
Type: MALWARE
ⓘ
Platforms: macOS
Version: 1.1
Created: 01 July 2020
Last Modified: 10 February 2022
Version Permalink

Associated Software Descriptions

Name Description
OSX.Bundlore

[1]
Enterprise Layer
download view

Techniques Used

Domain ID Name Use
Enterprise T1098 .004 Account Manipulation: SSH Authorized Keys

Bundlore creates a new key pair with ssh-keygen and drops the newly created user key in authorized_keys to enable remote login.[1]
Enterprise T1071 .001 Application Layer Protocol: Web Protocols

Bundlore uses HTTP requests for C2.[1]
Enterprise T1176 Browser Extensions

Bundlore can install malicious browser extensions that are used to hijack user searches.[1]
Enterprise T1059 .002 Command and Scripting Interpreter: AppleScript

Bundlore can use AppleScript to inject malicious JavaScript into a browser.[1]
.004 Command and Scripting Interpreter: Unix Shell

Bundlore has leveraged /bin/sh and /bin/bash to execute commands on the victim machine.[1]
.006 Command and Scripting Interpreter: Python

Bundlore has used Python scripts to execute payloads.[1]
.007 Command and Scripting Interpreter: JavaScript

Bundlore can execute JavaScript by injecting it into the victim's browser.[1]
Enterprise T1543 .001 Create or Modify System Process: Launch Agent

Bundlore can persist via a LaunchAgent.[1]
.004 Create or Modify System Process: Launch Daemon

Bundlore can persist via a LaunchDaemon.[1]
Enterprise T1140 Deobfuscate/Decode Files or Information

Bundlore has used openssl to decrypt AES encrypted payload data. Bundlore has also used base64 and RC4 with a hardcoded key to deobfuscate data.[1]
Enterprise T1189 Drive-by Compromise

Bundlore has been spread through malicious advertisements on websites.[1]
Enterprise T1048 Exfiltration Over Alternative Protocol

Bundlore uses the curl -s -L -o command to exfiltrate archived data to a URL.[2]
Enterprise T1222 .002 File and Directory Permissions Modification: Linux and Mac File and Directory Permissions Modification

Bundlore changes the permissions of a payload using the command chmod -R 755.[2]
Enterprise T1564 Hide Artifacts

Bundlore uses the mktemp utility to make unique file and directory names for payloads, such as TMP_DIR=`mktemp -d -t x.[2]
Enterprise T1562 .001 Impair Defenses: Disable or Modify Tools

Bundlore can change browser security settings to enable extensions to be installed. Bundlore uses the pkill cfprefsd command to prevent users from inspecting processes.[1][2]
Enterprise T1105 Ingress Tool Transfer

Bundlore can download and execute new versions of itself.[1]
Enterprise T1056 .002 Input Capture: GUI Input Capture

Bundlore prompts the user for their credentials.[1]
Enterprise T1036 .005 Masquerading: Match Legitimate Name or Location

Bundlore has disguised a malicious .app file as a Flash Player update.[1]
Enterprise T1027 Obfuscated Files or Information

Bundlore has obfuscated data with base64, AES, RC4, and bz2.[1]
Enterprise T1057 Process Discovery

Bundlore has used the ps command to list processes.[1]
Enterprise T1518 Software Discovery

Bundlore has the ability to enumerate what browser is being used as well as version information for Safari.[1]
Enterprise T1082 System Information Discovery

Bundlore will enumerate the macOS version to determine which follow-on behaviors to execute using /usr/bin/sw_vers -productVersion.[1][2]
Enterprise T1204 .002 User Execution: Malicious File

Bundlore has attempted to get users to execute a malicious .app file that looks like a Flash Player update.[1]

References

  1. Sushko, O. (2019, April 17). macOS Bundlore: Mac Virus Bypassing macOS Security Features. Retrieved June 30, 2020.
  1. Phil Stokes. (2021, February 16). 20 Common Tools & Techniques Used by macOS Threat Actors & Malware. Retrieved August 23, 2021.