Icefire

MITRE ATT&CK does not currently catalogue Icefire, 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: low. Treat it as orientation, not attribution.

1. T1059.001 PowerShell Execution

   What they do: icefire executes malicious commands via PowerShell scripts to stage payloads and manipulate system behavior.

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

2. T1685 Disable or Modify Tools Defense Impairment

   What they do: icefire disables security tools like antivirus software to prevent detection and mitigation responses.

   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.

3. T1070.004 File Deletion Stealth

   What they do: icefire deletes Volume Shadow Copies and backup directories to eliminate recovery options for victims.

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

4. T1057 Process Discovery Discovery

   What they do: icefire uses process discovery to identify critical system processes for targeting during execution.

   What that means: Adversaries may attempt to get information about running processes on a system.

5. T1135 Network Share Discovery Discovery

   What they do: icefire performs network share discovery to locate victim file shares for encryption and impact.

   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.

6. T1567.002 Exfiltration to Cloud Storage Exfiltration

   What they do: icefire exfiltrates stolen data via encrypted C2 channels to enable double extortion demands.

   What that means: Adversaries may exfiltrate data to a cloud storage service rather than over their primary command and control channel.

7. T1486 Data Encrypted for Impact Impact

   What they do: icefire encrypts victim files using custom ransomware binaries to maximize data impact and extortion leverage.

   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.

8. T1489 Service Stop Impact

   What they do: icefire executes service stop commands to disrupt critical services before deploying encryption routines.

   What that means: Adversaries may stop or disable services on a system to render those services unavailable to legitimate users.

9. T1490 Inhibit System Recovery Impact

   What they do: icefire calls system recovery inhibitors such as vssadmin to disable Volume Shadow Copy and backup restoration.

   What that means: Adversaries may delete or remove built-in data and turn off services designed to aid in the recovery of a corrupted system to prevent recovery.

10. T1491.001 Internal Defacement Impact

    What they do: icefire performs internal defacement by replacing victim files with custom ransomware icons to deter recovery.

    What that means: An adversary may deface systems internal to an organization in an attempt to intimidate or mislead users, thus discrediting the integrity of the systems.

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

********************Your network has been infected!!!********************

IMPORTANT : DO NOT DELETE THIS FILE UNTIL ALL YOUR DATA HAVE BEEN RECOVERED!!!

All your important files have been encrypted. Any attempts to restore your files with thrid-party software will be fatal for your files! Restore your data posible only buying private key from us. We have also downloaded a lot of private data from your network. If you do not contact us in a 5 days, we will post information about your breach on our public news webs.

You should get more information on our page, which is located in a Tor hidden network.
1.Download Tor browser - https://www.torproject.org/
2.Install Tor browser
3.Open link in Tor browser : nxx3cy6aee2s53v7v5pxrfv7crfssw7hmgejbj47cv6xuak3bgncllqd.onion
4.Follow the instructions on this page

Your account on our website
*************************************************************************
username:	[snip]
password:	[snip]

ATTENTION:
1.Do not try to recover files yourself, this process can damage your data and recovery will become impossible.
2.Do not waste time trying to find the solution on the internet. The longer you wait, the higher will become the decryption key price.
3.Tor Browser may be blocked in your country or corporate network. Use Tor Browser over VPN.

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