Disclosure context

About Arvinclub

Arvinclub is a relatively obscure ransomware operation that emerged in September 2021, primarily motivated by financial gain through extortion activities targeting organizations across multiple sectors. The group's origin and affiliations remain largely undocumented in public threat intelligence reporting, with limited information available from major security vendors or law enforcement agencies regarding their operational structure or whether they operate as a Ransomware-as-a-Service model. Based on available attack data, Arvinclub has demonstrated a diverse geographical targeting approach, with documented victims spanning Colombia, Iran, the United Kingdom, India, and Russia, suggesting either opportunistic targeting or the use of automated attack vectors rather than region-specific campaigns. The group has shown a preference for targeting manufacturing organizations, food and agriculture companies, financial institutions, and educational entities, accumulating approximately 35 known victims since their emergence. Their specific attack methodologies, including initial access vectors, encryption techniques, and data exfiltration practices, have not been extensively documented in public threat intelligence reports from major security firms. No significant high-profile campaigns, major law enforcement disruptions, or notable ransomware demands have been publicly attributed to this group by CISA, FBI, or established security research organizations. The current operational status of Arvinclub remains unclear due to limited public reporting and threat intelligence coverage of this particular ransomware variant. The group has been linked to 35 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post October 15, 2023. The operation is currently inactive.

Also tracked as: Arvin Club.

Timeline of this disclosure

October 13, 2023Kimia Tadbir Kiyan listed by Arvinclubon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,640 disclosures indexed across all operators we track. Geographically, Kimia Tadbir Kiyan is reported in Iran.

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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Kimia Tadbir Kiyan

Claimed by Arvinclub · listed 3 years ago

31m

Age

since listed · data leaked

Status timeline

Listed
Oct 13, 2023
Data leaked

At a glance

Group: Arvinclub
Status: Data leaked
Country: Iran
Sector: Business Services
Listed on leak site: Oct 13, 2023

About the victim

AI dossier — public-source company profile

Kimia Tadbir Kiyan (ktkco.ir) is an Iranian manufacturer of downhole oilfield equipment based in Arak, Iran. The company produces products including centralizers, shoe and collar assemblies, liner hangers, casing drifts, spirolizers, runners, cutting skips, and perforation tools used in oil well cementing and completion operations. It serves the Iranian oil and gas industry, leveraging multi-year management and technical expertise.

Industry: Oil & Gas Downhole Equipment Manufacturing
Address: Arak, Se-Rahe Khomein, Industrial Town No. 1, Puyandegan Street, Postal Code 3819954557, Iran

Attack summary

Severity: medium — Data has reportedly been published (disclosed status: data_published), indicating confirmed exfiltration, but no ransom was stated, no data size was given, and no specific sensitive data categories (PII at scale, financial, medical) were identified. The victim is a niche industrial manufacturer, moderately limiting broader impact.

The Arvinclub ransomware group claims an attack against Kimia Tadbir Kiyan with a disclosed status of data_published, suggesting data has been exfiltrated and released. No specific details on encryption, ransom demand, or volume of published data were captured in the leak post.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Company internal data
Potentially technical/engineering documents
Potentially business records

Sources

Victim sitektkco.ir

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.