Sarcoma
Since Oct 9, 2024, Sarcoma has listed 147 organizations on its leak site.
Listings per month
- Total listings
- 147
- First listing
- Oct 9, 2024
- Latest listing
- Oct 31, 2026
- MITRE ATT&CK techniques
- 23
Sarcoma is a ransomware group that debuted in October 2024, immediately ranking among the top three most active groups globally and surpassing 116 documented victims by mid-2025, targeting mid-market companies across manufacturing, retail, healthcare, legal, and business services with roughly 50% of victims in the United States.
It posted 9 listings in the last 12 months; the busiest month was October 2026 (6 listings).
Most targeted country: United States, with 32 listings (22% of the total).
Most targeted sector: Professional Services, with 39 listings (27% of the total).
Targeted countries
Showing 10 of 147 results
23 MITRE ATT&CK techniques across 10 stages are documented in the group's attacks.
- 1
Initial access
The attacker gets into the corporate network for the first time.
T1078Valid AccountsT1190Exploit Public-Facing ApplicationT1199Trusted RelationshipT1566PhishingT1566.001Phishing: Spearphishing Attachment - 2
Persistence
Access survives reboots and password changes.
T1053Scheduled Task/JobT1053.003Scheduled Task/Job: Cron - 3
Defense evasion
Security software and logging are bypassed.
T1027Obfuscated Files or InformationT1112Modify RegistryT1562Impair DefensesT1562.001Impair Defenses: Disable or Modify Tools - 4
Credential access
Passwords, tokens and session data are stolen.
T1003OS Credential Dumping - 5
Discovery
Systems, accounts and data on the network are mapped.
T1018Remote System DiscoveryT1083File and Directory DiscoveryT1614System Location DiscoveryT1614.001System Location Discovery: System Language Discovery - 6
Lateral movement
The attacker moves to other systems inside the network.
T1021Remote Services - 7
Collection
Data to be stolen is selected and gathered.
T1560Archive Collected Data - 8
Command and control
Compromised systems are controlled remotely.
T1219Remote Access Tools - 9
Exfiltration
Data is moved out of the organization; the threat to publish it in the listing relies on this data.
T1567Exfiltration Over Web Service - 10
Impact
Systems are encrypted or services are stopped.
T1486Data Encrypted for ImpactT1489Service StopT1490Inhibit System Recovery
What does a ransomware group do?
Ransomware groups break into corporate networks, move data out and encrypt systems. If the ransom is not paid, they list the organization on a leak site and threaten to publish the data.
How does Sarcoma get into organizations?
The attacker gets into the corporate network for the first time.
- T1078 · Valid Accounts
- T1190 · Exploit Public-Facing Application
- T1199 · Trusted Relationship
- T1566 · Phishing
- T1566.001 · Phishing: Spearphishing Attachment
Which defenses matter most?
Priority defenses based on the documented techniques:
- Keep internet-facing VPN, remote desktop and firewall interfaces patched, and require multi-factor authentication on these accounts.
- Monitor newly created services, scheduled tasks and startup entries.
- Alert when security software is disabled or logs are cleared.
- Regularly check whether employee passwords and session cookies appear in infostealer logs.
- Monitor accounts that run many queries in a short time and unusual network scans.
- Segment the network and expose management protocols only on the management network.
- Monitor large file archiving operations.
- Block unapproved use of remote management tools.
- Monitor unusual data volumes sent to cloud storage and file transfer services.
- Keep offline, immutable backups and test restores regularly.
What should you do if your organization is listed on a leak site?
- Record the listing and any published sample files; do not visit the leak site from the corporate network.
- Isolate affected systems and preserve logs without deleting them.
- Determine which data left the organization; if personal data is involved, review notification obligations with your legal team.
- Make any decision about the ransom demand together with legal, management and incident response.
- Do not bring systems back online before the attacker’s entry point is closed.
Is your organization mentioned?
Search with your domain to check whether your organization appears in ransomware listings, leaked records, forums and Telegram channels.
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