Devman

MITRE ATT&CK does not currently catalogue Devman, so this is our assessment of the techniques it uses, drawn from public reporting. The techniques themselves, and every "what that means" definition below, come from MITRE ATT&CK v19.2. Confidence: medium. Treat it as orientation, not attribution.

1. T1059.001 PowerShell Execution

   What they do: devman uses PowerShell scripts to execute malicious commands and stage ransomware payloads across compromised systems.

   What that means: Adversaries may abuse PowerShell commands and scripts for execution.

2. T1547.001 Registry Run Keys / Startup Folder PersistencePrivilege Escalation

   What they do: devman modifies registry run keys to maintain persistence by automatically launching ransomware after system reboots.

   What that means: Adversaries may achieve persistence by adding a program to a startup folder or referencing it with a Registry run key.

3. T1685 Disable or Modify Tools Defense Impairment

   What they do: devman disables antivirus tools and security software to prevent detection and ensure ransomware execution proceeds undetected.

   What that means: Adversaries may disable, degrade, or tamper with security tools or applications (e.g., endpoint detection and response (EDR) tools, intrusion detection systems (IDS), antivirus, logging agents, sensors, etc.) to impair or reduce visibility of defensive capabilities.

4. T1027.016 Junk Code Insertion Stealth

   What they do: devman inserts junk code into binaries to evade static analysis and pack malicious payloads for distribution.

   What that means: Adversaries may use junk code / dead code to obfuscate a malware’s functionality.

5. T1070.004 File Deletion Stealth

   What they do: devman deletes Volume Shadow Copies and backup directories via command-line tools to eliminate recovery options.

   What that means: Adversaries may delete files left behind by the actions of their intrusion activity.

6. T1018 Remote System Discovery Discovery

   What they do: devman uses remote system discovery to map network endpoints and identify high-value targets for encryption.

   What that means: Adversaries may attempt to get a listing of other systems by IP address, hostname, or other logical identifier on a network that may be used for Lateral Movement from the current system.

7. T1135 Network Share Discovery Discovery

   What they do: devman performs network share discovery to identify accessible remote directories for lateral movement and data targeting.

   What that means: Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as a precursor for Collection and to identify potential systems of interest for Lateral Movement.

8. T1041 Exfiltration Over C2 Channel Exfiltration

   What they do: devman exfiltrates stolen victim data through encrypted C2 channels before deploying ransomware for double extortion.

   What that means: Adversaries may steal data by exfiltrating it over an existing command and control channel.

9. T1486 Data Encrypted for Impact Impact

   What they do: devman encrypts victim files using strong symmetric encryption, targeting critical data across local and network shares.

   What that means: Adversaries may encrypt data on target systems or on large numbers of systems in a network to interrupt availability to system and network resources.

The note this group leaves on a compromised machine. Click a filename to read it.

██████╗ ███████╗██╗   ██╗███╗   ███╗ █████╗ ███╗   ██╗    ██████╗    ██╗
██╔══██╗██╔════╝██║   ██║████╗ ████║██╔══██╗████╗  ██║    ╚════██╗  ███║
██║  ██║█████╗  ██║   ██║██╔████╔██║███████║██╔██╗ ██║     █████╔╝  ╚██║
██║  ██║██╔══╝  ╚██╗ ██╔╝██║╚██╔╝██║██╔══██║██║╚██╗██║    ██╔═══╝    ██║
██████╔╝███████╗ ╚████╔╝ ██║ ╚═╝ ██║██║  ██║██║ ╚████║    ███████╗██╗██║
╚═════╝ ╚══════╝  ╚═══╝  ╚═╝     ╚═╝╚═╝  ╚═╝╚═╝  ╚═══╝    ╚══════╝╚═╝╚═╝
//////////////////////////////////////////////////////////////////////////////
///ENGLISH VERSION///////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
Dear, management and employees. We are the devman collective, and we are here to deliver some bad news.
All of your files have been encrypted with a unbreakable encryption algorithm.
However, this is not the only bad news for you. Around 100gb of your sensitive data,have been exfiltrated to our secure servers.
What does that mean for you? It means that if you do not cooperate with us, not only will you lose access to your files,
All of that sensitive data will be published online, causing irreparable damage to your reputation and potentially leading to legal consequences.
The only way to decrypt your files, and to prevent the data leak is to cooperate with us, and get the decryption tool and unique key.
What will happen if you do not cooperate with us?
1. Your files will remain encrypted forever.
2. Your sensitive data will be published online, and sent to your clients.
3. There is a high chance that you will face legal consequences for failing to protect your clients data, and violating data protection laws.
How to cooperate with us?
To obtain the decryption tool, you need to:
1. Contact us at: tygjm32hxyqienrgwxveiaw3azbjmfaln2znn2hldz2oe6v453ngwlyd.onion
2. Send your unique ID: [snip]
3. Receive a sample decryption of up to 4 files, and the file listing of exfiltrated data
4. We will provide payment instructions
5. After payment, you will receive decryption tool and unique key

WARNING:
- Do not modify encrypted files
- Do not use third party software to restore files
- Do not reinstall system

If you violate these rules, your files may be permanently damaged.

Unique ID: [snip]
Backup contact (Qtox) 9D97F166730F865F793E2EA07B173C742A6302879DE1B0BBB03817A5A04B572FBD82F984981D

Ransom-note text from RansomLook, licensed CC BY 4.0.