Disclosure context

About Rancoz

Rancoz is a relatively obscure ransomware group that emerged in May 2023, operating with apparent financial motivations and maintaining a low profile compared to major ransomware families. The group's origin and affiliations remain largely undetermined due to limited public documentation from major cybersecurity agencies and research organizations, with no confirmed information regarding their country of origin or whether they operate as a Ransomware-as-a-Service model. Based on available targeting data, Rancoz appears to focus primarily on manufacturing sector organizations within the United States, though their specific attack methodology, initial access vectors, and technical capabilities have not been extensively documented in public threat intelligence reports from established sources such as CISA, FBI, or major cybersecurity firms. With only six known victims documented since their emergence, the group has not conducted any widely-publicized major campaigns or attracted significant law enforcement attention that has been made public. Current intelligence suggests the group remains active as of recent observations, though their limited victim count and low public profile indicate they operate as a relatively minor threat actor within the broader ransomware ecosystem. The group has been linked to 6 public disclosures across our corpus. First observed on a leak site on May 5, 2023; most recent post September 3, 2023. The operation is currently inactive.

Timeline of this disclosure

June 14, 2023Air Comfort (aircomfort.ac) listed by Rancozon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Construction sector, which has 415 disclosures indexed across all operators we track. Geographically, Air Comfort (aircomfort.ac) is reported in Ascension Island.

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

← All victims

Air Comfort (aircomfort.ac)

Claimed by Rancoz · listed 3 years ago

35m

Age

since listed · data leaked

Status timeline

Listed
Jun 14, 2023
Data leaked

At a glance

Group: Rancoz
Status: Data leaked
Country: Ascension Island
Sector: Construction
Listed on leak site: Jun 14, 2023

About the victim

AI dossier — public-source company profile

Air Comfort (aircomfort.ac) appears to be an air conditioning and climate control services company, likely operating in or around Ascension Island based on the country attribution. The company operates in the construction/mechanical services sector, presumably providing HVAC installation, maintenance, or related services. No further verifiable details are available from the public site or leak post.

Industry: HVAC & Air Conditioning Services

Attack summary

Severity: medium — Data has reportedly been published by the threat actor, indicating confirmed exfiltration, but the leak post contains no detail on data type, volume, or sensitivity, and the company appears to be a small regional services firm with no indication of regulated or large-scale PII exposure.

The Rancoz ransomware group claims to have compromised Air Comfort and has published data ('data_published' status), though the leak post provides minimal detail on the nature of the attack or the specific data exfiltrated.

medium

What the group claims

Construction industry

Sources

Victim siteaircomfort.ac
Leak posthttp://ze677xuzard4lx4iul2yzf5ks4gqqzoulgj5u4n5n4bbbsxjbfr7eayd.onion/post/3.html

Source

Indexed 3 years 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.