Dok is a Trojan application disguised as a .zip file that is able to collect user credentials and install a malicious proxy server to redirect a user's network traffic (i.e. Adversary-in-the-Middle).[1][2][3]

ID: S0281
Associated Software: Retefe
Platforms: macOS
Version: 2.0
Created: 17 October 2018
Last Modified: 12 October 2021

Associated Software Descriptions

Name Description


Techniques Used

Domain ID Name Use
Enterprise T1548 .003 Abuse Elevation Control Mechanism: Sudo and Sudo Caching

Dok adds admin ALL=(ALL) NOPASSWD: ALL to the /etc/sudoers file.[2]

Enterprise T1557 Adversary-in-the-Middle

Dok proxies web traffic to potentially monitor and alter victim HTTP(S) traffic.[1][3]

Enterprise T1547 .015 Boot or Logon Autostart Execution: Login Items

Dok uses AppleScript to install a login Item by sending Apple events to the System Events process.[2]

Enterprise T1059 .002 Command and Scripting Interpreter: AppleScript

Dok uses AppleScript to create a login item for persistence.[1]

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

Dok installs two LaunchAgents to redirect all network traffic with a randomly generated name for each plist file maintaining the format[1][3]

Enterprise T1048 .003 Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted Non-C2 Protocol

Dok exfiltrates logs of its execution stored in the /tmp folder over FTP using the curl command.[2]

Enterprise T1222 .002 File and Directory Permissions Modification: Linux and Mac File and Directory Permissions Modification

Dok gives all users execute permissions for the application using the command chmod +x /Users/Shared/[3]

Enterprise T1056 .002 Input Capture: GUI Input Capture

Dok prompts the user for credentials.[1]

Enterprise T1027 .002 Obfuscated Files or Information: Software Packing

Dok is packed with an UPX executable packer.[2]

Enterprise T1090 .003 Proxy: Multi-hop Proxy

Dok downloads and installs Tor via homebrew.[1]

Enterprise T1553 .004 Subvert Trust Controls: Install Root Certificate

Dok installs a root certificate to aid in Adversary-in-the-Middle actions using the command add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain /tmp/filename.[1][2]