GandCrab was a prolific ransomware-as-a-service (RaaS) operation that emerged in January 2018 and became one of the most widespread ransomware families before its operators announced retirement in May 2019, claiming to have earned over $2 billion in ransom payments. The group operated primarily for financial gain, recruiting affiliates through underground forums to distribute their ransomware in exchange for a percentage of ransom payments. GandCrab was believed to be operated by Russian-speaking cybercriminals, with the group explicitly avoiding targeting systems in Russia and former Soviet states, and operated as a sophisticated RaaS model providing affiliates with customized ransomware builds, payment portals, and technical support. The ransomware typically gained initial access through exploit kits, phishing campaigns, and remote desktop protocol attacks, employed strong encryption algorithms, and evolved to include data exfiltration capabilities in later versions, threatening to publish stolen data if ransom demands were not met. During its active period, GandCrab infected hundreds of thousands of systems worldwide across multiple sectors including healthcare, government, and education, with notable campaigns targeting managed service providers to achieve widespread lateral movement, though the group faced multiple law enforcement disruptions including a collaboration between Romanian police, Europol, and security researchers that resulted in the release of decryption tools for earlier variants. The GandCrab operators officially announced their retirement in May 2019, claiming financial success, though security researchers have identified potential connections between former GandCrab affiliates and subsequent ransomware operations including REvil/Sodinokibi. The group has been linked to 1 public disclosures across our corpus. First observed on a leak site on September 9, 2018. The operation is currently inactive.
Sector and geography
This disclosure adds to ransomware activity in the Education Facilities sector, which has 27 disclosures indexed across all operators we track. Geographically, Monroe County School District is reported in United States, a country with 11,033 ransomware disclosures in our corpus.
If your organisation is affected
A listing by gandcrab means Monroe County School District 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, CISA (United States), as required for your jurisdiction.
- Monitor for the data appearing on gandcrab'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.
