Skip to main content
Darkfield

Operator dossier

0day Syndicate is a ransomware operator currently active on public leak sites. Darkfield has indexed 5 public victims claimed by this operator between May 28, 2026 and May 29, 2026. 0day Syndicate is a ransomware group first observed in May 2026 with an apparent financial motivation, consistent with the broader cybercriminal ransomware ecosystem. With only four known victims documented at this time, the group remains relatively obscure with limited publicly available technical analysis from major threat intelligence sources such as CISA, FBI, or Mandiant. Based on available victimology data, the group has targeted organizations primarily in Brazil, Ghana, and the United States, with a focus on the Business Services and Technology sectors, suggesting a deliberate interest in data-rich organizations that may be more inclined to pay ransoms to protect sensitive client information. Given the nascent nature of this group and the limited open-source intelligence available, attribution regarding country of origin, affiliation with other threat actors, and specific technical tooling cannot be responsibly stated at this time. Similarly, whether the group operates as a Ransomware-as-a-Service platform or as an independent closed operation remains unconfirmed in public reporting. No notable high-profile campaigns, law enforcement actions, or documented rebranding activity have been publicly attributed to this group as of the time of this assessment. Given the group's recent emergence and low victim count, 0day Syndicate should be monitored as an emerging threat, with particular attention warranted by organizations in the targeted sectors and geographies pending further technical intelligence development.

Most-targeted sectors

Most-affected countries

Recent disclosures by 0day Syndicate

All 5 indexed disclosures. Click any row for the full per-victim dossier.

See every disclosure indexed for 0day Syndicate →

How we know this. Operator profiles on Darkfield are built from continuous monitoring of every leak site the group is known to operate, cross-correlated with community-curated feeds (RansomLook, ransomware.live, RansomWatch, MISP-galaxy). Status flips from active to inactive when no new disclosure appears for 60 days. MITRE ATT&CK mappings shown in the interactive section below are sourced from CISA, vendor analysis, and the MITRE community catalog — we attribute each technique back to its source. Aliases reflect operator re-brands and affiliate splits.

Active ransomware operator

← All groups

0day Syndicate

5 victims indexed · first seen 2 months ago · last activity 2 months ago

5
Victims indexed
#252 of 364 tracked operators
<1m
Active period
May 2026 → May 2026
3
Countries hit
top BR · 1

At a glance

Status
active
First seen
2 months ago
Last activity
2 months ago
Primary sector
Business Services · 2 hits

About

0day Syndicate is a ransomware group first observed in May 2026 with an apparent financial motivation, consistent with the broader cybercriminal ransomware ecosystem. With only four known victims documented at this time, the group remains relatively obscure with limited publicly available technical analysis from major threat intelligence sources such as CISA, FBI, or Mandiant. Based on available victimology data, the group has targeted organizations primarily in Brazil, Ghana, and the United States, with a focus on the Business Services and Technology sectors, suggesting a deliberate interest in data-rich organizations that may be more inclined to pay ransoms to protect sensitive client information. Given the nascent nature of this group and the limited open-source intelligence available, attribution regarding country of origin, affiliation with other threat actors, and specific technical tooling cannot be responsibly stated at this time. Similarly, whether the group operates as a Ransomware-as-a-Service platform or as an independent closed operation remains unconfirmed in public reporting. No notable high-profile campaigns, law enforcement actions, or documented rebranding activity have been publicly attributed to this group as of the time of this assessment. Given the group's recent emergence and low victim count, 0day Syndicate should be monitored as an emerging threat, with particular attention warranted by organizations in the targeted sectors and geographies pending further technical intelligence development.

Timeline

1 months
2026-05-01T00:00:00+00:00 · 4
2026-05-01T00:00:00+00:002026-05-01T00:00:00+00:00

Top countries

🇧🇷 Brazil
1
Ghana
1
🇺🇸 United States
1
Brazil dossier →Ghana dossier →United States dossier →

Top sectors

Business Services
2
Technology
2
Business Services dossier →Technology dossier →

MITRE ATT&CK

10 techniques · 6 tactics

Tactics

Initial AccessDefense EvasionDiscoveryCollectionExfiltrationImpact

Techniques

  • T1190Exploit Public-Facing Application
  • T1566Phishing
  • T1027Obfuscated Files or Information
  • T1082System Information Discovery
  • T1083File and Directory Discovery
  • T1057Process Discovery
  • T1005Data from Local System
  • T1041Exfiltration Over C2 Channel
  • T1486Data Encrypted for Impact
  • T1490Inhibit System Recovery

Recent victims

Loading…

Source

Updated 2 months ago

Data on this page is sourced from the group's own leak posts, cross-checked with public ransomware trackers (RansomLook, ransomware.live, RansomWatch), MITRE ATT&CK, and our own Tor and Telegram crawlers. This is a public observatory page — share freely.

Get alerted the next time 0day Syndicate posts a victim.

Add 0day Syndicate to your watchlist — Pro pings you within 5 minutes of any new 0day Syndicate leak-site post, Telegram callout, or affiliate-rebrand inference.