Was Seidor hit by ransomware?

Seidor was listed by the TiMc ransomware operation (Spain), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the TiMc ransomware group?

TiMc is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Seidor breach?

TiMc published data attributed to Seidor. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Seidor

Claimed by TiMc · listed 3 months ago

Age

since listed · data leaked

Status timeline

ListedApr 9, 2026
Data leakeddate unknown

At a glance

Group: TiMc
Status: Data leaked
Country: Spain
Sector: Business Services
Listed on leak site: Apr 9, 2026

About the victim

AI dossier — public-source company profile

SEIDOR is a global technology consulting firm headquartered in Spain, offering services spanning ERP ecosystems, artificial intelligence, cloud, cybersecurity, digital solutions, and application modernization. The company works with major technology partners including SAP, Microsoft, IBM, AWS, and Google Cloud, and reported revenues of €1.174 billion in 2025. SEIDOR serves a broad range of industries including banking, healthcare, retail, pharma, and the public sector across international markets.

Industry: Technology Consulting & IT Services
Employees: 5001-10000

Attack summary

Severity: high — Confirmed exfiltration and publication of 200 GB+ of data from a large technology consulting firm that handles sensitive client environments across banking, healthcare, pharma, and public sector; the breadth of SEIDOR's client base amplifies potential downstream impact.

The group TiMc claims to have exfiltrated over 200 GB of data from SEIDOR and states the company attempted to conceal the breach; the data has since been published following expiry of a countdown deadline.

high

Data the group says was taken

AI dossier — extracted from the leak post

Exfiltrated corporate data (200 GB+)

What the group claims

On behalf of A IT solution company , the first response to the data breach was trying to cover the truth, shame on you When the countdown was over, we will public your newest 200GB+ data.

Sources

Victim sitewww.seidor.com

Source

Indexed 3 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About TiMc

TiMc is an emerging ransomware group first observed in April 2026, with limited public documentation indicating financially-motivated cybercriminal activity targeting organizations primarily in Spain and Argentina. Given the recent emergence and limited victim count of three known cases, there is insufficient public intelligence from major security agencies or researchers to definitively establish the group's country of origin, operational structure, or potential affiliations with other threat actors. The group has demonstrated a targeting preference for business services and healthcare sectors based on observed victim patterns, though their specific attack methodologies, initial access vectors, encryption techniques, and whether they employ data exfiltration or multiple extortion tactics remain undocumented in available threat intelligence reporting. No major campaigns, high-profile incidents, or law enforcement actions against TiMc have been publicly reported by CISA, FBI, Mandiant, or other established security research organizations. The group's current operational status remains unclear due to limited visibility and the nascent nature of their observed activities. The group has been linked to 8 public disclosures across our corpus. First observed on a leak site on April 9, 2026; most recent post June 11, 2026. The operation is currently active.

Timeline of this disclosure

April 9, 2026Seidor listed by TiMcon the group's public leak site

Other recent disclosures by TiMc

TiMc has been linked to 8 public victims on Darkfield. A sample of the most recent:

See the full TiMc dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, Seidor is reported in Spain, a country with 128 ransomware disclosures in our corpus.

If your organisation is affected

A listing by TiMc means Seidor appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, INCIBE-CERT (Spain), as required for your jurisdiction.
Monitor for the data appearing on TiMc's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.