Cервис управления информационной безопасностью
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MITRE ATT&CK - Инструмент Green Lambert
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Green Lambert
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Green Lambert

Green Lambert is a modular backdoor that security researchers assess has been used by an advanced threat group referred to as Longhorn and The Lamberts. First reported in 2017, the Windows variant of Green Lambert may have been used as early as 2008; a macOS version was uploaded to a multiscanner service in September 2014.(Citation: Kaspersky Lamberts Toolkit April 2017)(Citation: Objective See Green Lambert for OSX Oct 2021)
ID: S0690
Type: MALWARE
Platforms: Windows
Version: 1.0
Created: 21 Mar 2022
Last Modified: 20 Apr 2022

Techniques Used
Domain ID Name Use
Enterprise T1071 .004 Application Layer Protocol: DNS

Green Lambert can use DNS for C2 communications.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)
Enterprise T1547 .015 Boot or Logon Autostart Execution: Login Items

Green Lambert can add Login Items to establish persistence.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

Enterprise T1037 .004 Boot or Logon Initialization Scripts: RC Scripts

Green Lambert can add init.d and rc.d files in the /etc folder to establish persistence.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

Enterprise T1059 .004 Command and Scripting Interpreter: Unix Shell

Green Lambert can use shell scripts for execution, such as /bin/sh -c.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

Enterprise T1543 .001 Create or Modify System Process: Launch Agent

Green Lambert can create a Launch Agent with the `RunAtLoad` key-value pair set to true, ensuring the `com.apple.GrowlHelper.plist` file runs every time a user logs in.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)
.004 Create or Modify System Process: Launch Daemon

Green Lambert can add a plist file in the `Library/LaunchDaemons` to establish persistence.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

Enterprise T1555 .001 Credentials from Password Stores: Keychain

Green Lambert can use Keychain Services API functions to find and collect passwords, such as `SecKeychainFindInternetPassword` and `SecKeychainItemCopyAttributesAndData`.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

Enterprise T1546 .004 Event Triggered Execution: Unix Shell Configuration Modification

Green Lambert can establish persistence on a compromised host through modifying the `profile`, `login`, and run command (rc) files associated with the `bash`, `csh`, and `tcsh` shells. (Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

Enterprise T1070 .004 Indicator Removal: File Deletion

Green Lambert can delete the original executable after initial installation in addition to unused functions.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

Enterprise T1036 .004 Masquerading: Masquerade Task or Service

Green Lambert has created a new executable named `Software Update Check` to appear legitimate.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

.005 Masquerading: Match Legitimate Name or Location

Green Lambert has been disguised as a Growl help file.(Citation: Objective See Green Lambert for OSX Oct 2021)(Citation: Glitch-Cat Green Lambert ATTCK Oct 2021)

References

  1. GREAT. (2017, April 11). Unraveling the Lamberts Toolkit. Retrieved March 21, 2022.
  2. Sandvik, Runa. (2021, October 1). Made In America: Green Lambert for OS X. Retrieved March 21, 2022.
  3. Sandvik, Runa. (2021, October 18). Green Lambert and ATT&CK. Retrieved March 21, 2022.
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