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Poseidon

Poseidon is a Go-based post-exploitation agent for the open-source Mythic command-and-control framework, primarily used against macOS and also available for Linux.

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Poseidon

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Poseidon is a Go-based post-exploitation agent for the open-source Mythic command-and-control framework, primarily used against macOS and also available for Linux. It supports host profiling and remote tasking including shell execution, process and directory enumeration, file upload and download, screen capture, keylogging, clipboard monitoring, SSH credential testing, port scanning, SOCKS proxying, and persistence-related actions. macOS variants support persistence through LaunchAgents, LaunchDaemons, and Login Items. Poseidon has been deployed in the CrateDepression Rust supply-chain campaign against GitLab CI environments and in phishing campaigns targeting Indian government personnel using UNIX-based systems; APT36/Transparent Tribe has used Poseidon, though the publicly available agent alone is not sufficient for attribution. The name Poseidon is also used for unrelated macOS infostealer and point-of-sale RAM-scraping malware families, which should not be conflated with the Mythic agent.

Capabilities

  • Brute Force
  • Exfiltration
  • Keylogging
  • Persistence
  • Post Exploitation
  • Reconnaissance
  • Scanning

Reported operators

Threat actors

5 named in public reporting
Transparent Tribe

Помимо Crimson RAT, в арсенал APT36 входят DeskRAT, AresRAT, AllaKore, GetaRAT и Poseidon.

Rodrigo4

The threat actor rebranded the new project ‘Poseidon’ and added a few new features such as looting VPN configurations.

APT-36

We observed that Mythic Agents had been utilized by the APT-36 group in their operations. One such Agent is “Poseidon.”

TEMP.Lapis

this report explains the usage of Poseidon malware which targets government employees who use UNIX-based systems for their jobs ... The 2nd stage file is defined as a payload named Poseidon, written in Go programming language and included in the MythicAgents project on GitHub.

TraderTraitor

After gaining initial access to the developer's machine, attackers deployed MythicC2's Poseidon agent, a robust Golang-based payload offering advanced stealth and extensive post-exploitation capabilities for macOS environments.

MITRE ATT&CK

Poseidon in ATT&CK

51 distinct techniques

Techniques

51 techniques
T1041 Exfiltration Over C2 Channel T1555.003 Credentials from Web Browsers T1005 Data from Local System T1552.004 Private Keys T1036 Masquerading T1555 Credentials from Password Stores T1649 Steal or Forge Authentication Certificates T1560 Archive Collected Data T1059.002 AppleScript T1189 Drive-by Compromise T1583 Acquire Infrastructure T1057 Process Discovery T1056 Input Capture T1059.003 Windows Command Shell T1543.003 Windows Service T1056.001 Keylogging T1055 Process Injection T1105 Ingress Tool Transfer T1547.001 Registry Run Keys / Startup Folder T1001 Data Obfuscation T1059 Command and Scripting Interpreter T1543.001 Launch Agent T1053.003 Cron T1566 Phishing T1071 Application Layer Protocol T1082 System Information Discovery T1620 Reflective Code Loading T1115 Clipboard Data T1113 Screen Capture T1046 Network Service Discovery T1033 System Owner/User Discovery T1090.001 Internal Proxy T1083 File and Directory Discovery T1110.003 Password Spraying T1195.001 Compromise Software Dependencies and Development Tools T1608.001 Upload Malware T1027 Obfuscated Files or Information T1553.001 Gatekeeper Bypass T1547 Boot or Logon Autostart Execution T1528 Steal Application Access Token T1129 Shared Modules T1070.004 File Deletion T1071.001 Web Protocols T1204 User Execution T1539 Steal Web Session Cookie T1003.001 LSASS Memory T1566.001 Spearphishing Attachment T1059.004 Unix Shell T1566.003 Spearphishing via Service T1497 Virtualization/Sandbox Evasion T1552 Unsecured Credentials

Reporting

Research mentioning Poseidon

Jul 31
Malware News

CaptiveCrunch: Midnight Blizzard targets travelers worldwide for malware delivery and credential theft - Malware News - Malware Analysis, News and Indicators

Microsoft reported that social-engineering lures are increasingly being used to trick users into launching malware themselves, with the ClickFix technique emerging as a major delivery method across phishing, malvertising, and compromised websites. In ClickFix attacks, victims are shown fake CAPTCHA, verification, or repair prompts that copy malicious commands to the clipboard and persuade them to run them, often leading to fileless execution through LOLBins, obfuscated PowerShell, and follow-on payloads such as Lumma Stealer, DarkGate, Latrodectus, ScreenConnect, and AMOS. Microsoft said the technique has hit thousands of enterprise and consumer devices daily and is now supported by a growing underground market of ClickFix builder kits sold on criminal forums. Fresh activity shows the tactic continuing to evolve. A SmartApeSG campaign observed on compromised web traffic redirected victims to a fake human-verification flow that fetched an HTA downloader from deltaode[.]com, retrieved a ZIP archive, and abused DLL side-loading to launch an unidentified RAT that later communicated with 89.124.79[.]98 over TCP 443. Separately, Microsoft linked the CaptiveCrunch campaign to Storm-2945, a sub-cluster of Russia-linked Midnight Blizzard, which has manipulated DNS and HTTP traffic on hospitality and other captive-portal networks to redirect travelers to phishing pages and fake browser or OS updates delivering CornFlake and ChocoShell for credential theft and espionage, including theft of browser credentials, Microsoft 365 tokens, and Wi-Fi credentials.

Jul 31
Malware Traffic Analysis

Malware-Traffic-Analysis.net - 2026-07-31: SmartApeSG ClickFix campaign pushes unidentified RAT

Jul 21
Security Online Info

ClickLock Stealer: macOS Malware That Locks You Out

Researchers reported a new macOS infostealer dubbed ClickLock Stealer that tricks users into pasting a malicious bash command into Terminal through ClickFix-style pages masquerading as Cloudflare verification prompts. Group-IB said the malware has been active since at least late May and has targeted at least 100 users in 33 countries, with more than half of victims in Europe. Once launched, the malware downloads multiple payloads for browser credential theft, cryptocurrency wallet theft, Keychain theft, password manager and FileZilla credential collection, shell history harvesting, and backdoor installation, then exfiltrates the stolen data to a Telegram bot. Researchers also linked the campaign to LaunchAgent persistence and a backdoor called goyim derived largely from GSocket tooling. ClickLock does not rely on a software exploit or privilege escalation; instead, it abuses user execution and suppresses defenses by repeatedly killing visible applications and NotificationCenter, sometimes every 210 milliseconds, until victims enter their macOS password and approve Keychain access. Apple separately published guidance warning that scammers increasingly use websites, chat agents, messaging platforms, and email to socially engineer Mac users into pasting unsafe Terminal commands, and said macOS may warn or block commands and scripts associated with known malware. Apple said such alerts mean the Mac has not yet been harmed and advised users not to run untrusted commands or scripts unless they fully trust the source.

Jul 20
Macrumors

'ClickLock' Malware Coerces Mac Users Into Giving Up Passwords - MacRumors

Jul 20
Xakep

Стилер ClickLock для macOS завершает процессы, вынуждая жертву ввести пароль - Хакер

Jul 18
Cysecurity News

Group-IB Uncovers ClickLock macOS Malware Targeting Passwords and Crypto Wallets - CySecurity News - Latest Information Security and Hacking Incidents

Jul 17
Scworld

New macOS stealer uses social engineering and coercion | brief | SC Media

Jul 17
Techrepublic Com Security

ClickLock Mac Malware Can Disable Apps for Three Days

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