Lynx

MITRE ATT&CK does not currently catalogue Lynx, 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: lynx executes PowerShell scripts to run payload deployment and post-compromise actions silently.

   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: lynx modifies registry run keys to maintain persistence across reboots after initial compromise.

   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: lynx disables antivirus and monitoring tools to prevent detection and persistence mechanisms from operating.

   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. T1027.013 Encrypted/Encoded File Stealth

   What they do: lynx encrypts victim files using encoded payloads to hide malicious content from static analysis.

   What that means: Adversaries may encrypt or encode files to obfuscate strings, bytes, and other specific patterns to impede detection.

5. T1070.004 File Deletion Stealth

   What they do: lynx deletes Volume Shadow Copies and backup artifacts to prevent victim recovery.

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

6. T1135 Network Share Discovery Discovery

   What they do: lynx uses network share discovery to locate victim file shares and staging directories for encryption targets.

   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.

7. T1021.002 SMB/Windows Admin Shares Lateral Movement

   What they do: lynx uses SMB/Windows Admin Shares for lateral movement between networked hosts.

   What that means: Adversaries may use Valid Accounts to interact with a remote network share using Server Message Block (SMB).

8. T1486 Data Encrypted for Impact Impact

   What they do: lynx encrypts critical data files with its ransomware payload to maximize operational disruption.

   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.

9. T1490 Inhibit System Recovery Impact

   What they do: lynx calls system recovery inhibitors to block backup restoration and isolate compromised systems.

   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.

Software Lynx has been seen using, grouped by what it is used for. Legitimate administration tools appear here because these actors routinely abuse them — presence in this list is not itself malicious.

Tool data from Ransomware Tool Matrix by BushidoUK, licensed CC BY 4.0. Grouped by purpose and matched to this group by Breach House.

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

Your data is stolen and encrypted.
Download TOR Browser to contact with us.

ID
 ~ [snip]

Chat site:
 ~ TOR Network: http://lynxchatly4zludmhmi75jrwhycnoqvkxb4prohxmyzf4euf5gjxroad.onion/login
 ~ TOR Mirror #1: http://lynxchatfw4rgsclp4567i4llkqjr2kltaumwwobxdik3qa2oorrknad.onion/login
 ~ TOR Mirror #2: http://lynxchatohmppv6au67lloc2vs6chy7nya7dsu2hhs55mcjxp2joglad.onion/login
 ~ TOR Mirror #3: http://lynxchatbykq2vycvyrtjqb3yuj4ze2wvdubzr2u6b632trwvdbsgmyd.onion/login
 ~ TOR Mirror #4: http://lynxchatde4spv5x6xlwxf47jdo7wtwwgikdoeroxamphu3e7xx5doqd.onion/login
 ~ TOR Mirror #5: http://lynxchatdy3tgcuijsqofhssopcepirjfq2f4pvb5qd4un4dhqyxswqd.onion/login
 ~ TOR Mirror #6: http://lynxchatdykpoelffqlvcbtry6o7gxk3rs2aiagh7ddz5yfttd6quxqd.onion/login
 ~ TOR Mirror #7: http://lynxch2k5xi35j7hlbmwl7d6u2oz4vp2wqp6qkwol624cod3d6iqiyqd.onion/login

Our blog:
 ~ TOR Network: http://lynxblogxstgzsarfyk2pvhdv45igghb4zmthnzmsipzeoduruz3xwqd.onion/
 ~ TOR Mirror #1: http://lynxblogco7r37jt7p5wrmfxzqze7ghxw6rihzkqc455qluacwotciyd.onion/
 ~ TOR Mirror #2: http://lynxblogijy4jfoblgix2klxmkbgee4leoeuge7qt4fpfkj4zbi2sjyd.onion/
 ~ TOR Mirror #3: http://lynxblogmx3rbiwg3rpj4nds25hjsnrwkpxt5gaznetfikz4gz2csyad.onion/
 ~ TOR Mirror #4: http://lynxblogoxllth4b46cfwlop5pfj4s7dyv37yuy7qn2ftan6gd72hsad.onion/
 ~ TOR Mirror #5: http://lynxblogtwatfsrwj3oatpejwxk5bngqcd5f7s26iskagfu7ouaomjad.onion/
 ~ TOR Mirror #6: http://lynxblogxutufossaeawlij3j3uikaloll5ko6grzhkwdclrjngrfoid.onion/
 ~ Mirror #7: http://lynxblog.net/

Your data is stolen and encrypted.
Your unique identificator is [snip]
Use this TOR site to contact with us:
http://lynxch2k5xi35j7hlbmwl7d6u2oz4vp2wqp6qkwol624cod3d6iqiyqd.onion/login

Use this email to contact with us:
[email protected]

Our blog
 ~ TOR Network: http://lynxbllrfr5262yvbgtqoyq76s7mpztcqkv6tjjxgpilpma7nyoeohyd.onion/disclosures
 ~ Mirror #1: http://lynxblog.net/

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