Disclosure context

About crypto24

Crypto24 is a recently emerged ransomware group first observed in April 2025, with a primary financial motivation evidenced by their targeting of high-value sectors across multiple geographic regions. The group's origin and affiliations remain unclear due to their recent emergence, though their targeting pattern suggests either independent operations or a new ransomware-as-a-service offering given the diverse geographic spread of their 43 documented victims. Their attack methodology and specific technical capabilities have not yet been thoroughly documented by major threat intelligence providers, though their targeting of technology, financial services, healthcare, and business services sectors indicates they likely employ common initial access vectors such as phishing or exploitation of public-facing applications to gain entry into victim networks. The group has demonstrated a preference for targeting organizations primarily in the United States while also conducting operations across Southeast Asia including Malaysia, Singapore, and Indonesia, as well as extending their reach to Egypt, suggesting either a globally distributed affiliate network or opportunistic targeting based on vulnerable infrastructure discovery. Crypto24 remains active as of the latest available intelligence reporting, though given their recent emergence, comprehensive details about their specific tactics, techniques, and procedures await further analysis by established cybersecurity research organizations. The group has been linked to 49 public disclosures across our corpus. First observed on a leak site on April 8, 2025; most recent post May 18, 2026. The operation is currently active.

Timeline of this disclosure

December 23, 2025Unified Assessment Platform ExamRoom.AI listed by crypto24on the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Education sector, which has 694 disclosures indexed across all operators we track. Geographically, Unified Assessment Platform ExamRoom.AI is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Unified Assessment Platform ExamRoom.AI

Claimed by crypto24 · listed 5 months ago

Age

since listed · data leaked

Status timeline

Listed
Dec 23, 2025
Data leaked

At a glance

Group: crypto24
Status: Data leaked
Country: United States
Sector: Education
Listed on leak site: Dec 23, 2025

About the victim

AI dossier — public-source company profile

ExamRoom.AI operates the Unified Assessment Platform™, a cloud-based online examination and proctoring solution serving educational institutions and other organizations. The company offers AI-driven remote proctoring, assessment delivery, and related products. It is US-based and has announced plans to go open source.

Industry: EdTech / Online Assessment & Proctoring

Attack summary

Severity: high — ExamRoom.AI handles student identity data, exam records, and potentially biometric/proctoring data (video, facial recognition) at scale across educational institutions; a confirmed data_published status implies exfiltration of likely sensitive PII and assessment records, warranting a high severity rating even without explicit proof counts in the post.

The group crypto24 claims a successful attack against ExamRoom.AI with status listed as data_published, indicating data has been exfiltrated and disclosed; however, the leak post body is empty so specific claims about encryption or the nature of data published cannot be independently verified from the post alone.

high

What the group claims

***

Sources

Victim siteexamroom.ai

Source

Indexed 5 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.