Upon installation, the disk image mounts thereby initiating the bash shell script installation. The installers are usually macOS disk image files (DMG) that are distributed via compromised Google search results or downloaded from websites with poor reputation (like cracks, keygens).
#BUNDLORE COPYLESS INSTALL#
The malicious shell scripts used by Shlayer and Bundlore are usually malvertising-focused adware bundlers using shell scripts in the kill chain to download and install an adware payload. Shlayer and Bundlore – malicious Shell scripts We will also discuss the inbuilt macOS utilities leveraged by these malwares and showcase the Uptycs EDR detection capabilities. In this post, we will showcase the different variants of malicious shell scripts used in Shlayer and Bundlore that have been constantly in the rounds.
These malware are the most predominant malware in macOS, also with a history of evading and bypassing the built-in Xprotect, Gatekeeper, Notarization and File Quarantine security features of macOS. Though these scripts have slight variations, they mostly belong to a plague of adware strains- Shlayer and Bundlore. The Uptycs threat research team has been observing over 90% of macOS malware in our daily analysis and customer telemetry alerts using shell scripts. app file that looks like a Flash Player update.Uptycs threat research team analyzed macOS malware threat landscape and discovered that Shlayer and Bundlore are the most predominant malware. īundlore has attempted to get users to execute a malicious. īundlore will enumerate the macOS version to determine which follow-on behaviors to execute using /usr/bin/sw_vers -productVersion.
īundlore has the ability to enumerate what browser is being used as well as version information for Safari. īundlore has used the ps command to list processes. īundlore has obfuscated data with base64, AES, RC4, and bz2. Masquerading: Match Legitimate Name or Locationīundlore has disguised a malicious.
īundlore prompts the user for their credentials. īundlore can download and execute new versions of itself. Bundlore uses the pkill cfprefsd command to prevent users from inspecting processes. īundlore can change browser security settings to enable extensions to be installed. īundlore uses the mktemp utility to make unique file and directory names for payloads, such as TMP_DIR=`mktemp -d -t x.
#BUNDLORE COPYLESS MAC#
įile and Directory Permissions Modification: Linux and Mac File and Directory Permissions Modificationīundlore changes the permissions of a payload using the command chmod -R 755. īundlore uses the curl -s -L -o command to exfiltrate archived data to a URL. īundlore has been spread through malicious advertisements on websites. Bundlore has also used base64 and RC4 with a hardcoded key to deobfuscate data. īundlore has used openssl to decrypt AES encrypted payload data. Ĭreate or Modify System Process: Launch Daemonīundlore can persist via a LaunchDaemon. Ĭreate or Modify System Process: Launch Agentīundlore can persist via a LaunchAgent. Ĭommand and Scripting Interpreter: JavaScriptīundlore can execute JavaScript by injecting it into the victim's browser. Ĭommand and Scripting Interpreter: Pythonīundlore has used Python scripts to execute payloads. Ĭommand and Scripting Interpreter: Unix Shellīundlore has leveraged /bin/sh and /bin/bash to execute commands on the victim machine. Ĭommand and Scripting Interpreter: AppleScriptīundlore can use AppleScript to inject malicious JavaScript into a browser. Īpplication Layer Protocol: Web Protocolsīundlore can install malicious browser extensions that are used to hijack user searches. Enterprise Layer download view Techniques Used DomainĪccount Manipulation: SSH Authorized Keysīundlore creates a new key pair with ssh-keygen and drops the newly created user key in authorized_keys to enable remote login.
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