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

September 2, 2023Aban Tether & OK exchange listed by Arvinclubon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 516 disclosures indexed across all operators we track. Geographically, Aban Tether & OK exchange 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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Aban Tether & OK exchange

Claimed by Arvinclub · listed 3 years ago

33m

Age

since listed · data leaked

Status timeline

Listed
Sep 2, 2023
Data leaked

At a glance

Group: Arvinclub
Status: Data leaked
Country: Iran
Sector: Financial Services
Listed on leak site: Sep 2, 2023

About the victim

AI dossier — public-source company profile

Aban Tether and OK Exchange appear to be Iranian cryptocurrency exchange platforms, with Aban Tether (abantether.com) likely focused on Tether (USDT) trading and OK Exchange (ok-ex.io) operating as a broader crypto trading platform. Both operate within Iran's financial services sector, serving retail and possibly institutional crypto users. No further verifiable details are available from the provided site content.

Industry: Cryptocurrency Exchange & Trading

Attack summary

Severity: high — Cryptocurrency exchanges handle sensitive financial data, KYC/PII, and wallet information at scale. Data_published status indicates confirmed exfiltration and release, which is significant even without a captured leak post detailing the scope.

The Arvinclub ransomware group claims to have attacked Aban Tether and OK Exchange, with the disclosure status indicating data has been published. No specific details on encryption, exfiltration methods, or data volume are available from the captured leak post.

high

Data the group says was taken

AI dossier — extracted from the leak post

User account records
Financial transaction data
KYC/identity verification documents
Cryptocurrency wallet information

Sources

Victim siteabantether.com https://ok-ex.io

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.