# Clop ransomware claims Columbia Bank compromise

Published: 2026-09-23 · Severity: high · Sectors: financial-services
Canonical: https://vorant.io/reports/76999029-2bfd-543b-a47d-64045587efb3/clop-ransomware-claims-columbia-bank-compromise

> Clop ransomware gang claims to have compromised Columbia Bank, exfiltrating data from one employee and exposing 445 user credentials.

Clop ransomware operators have posted a victim claim for Columbia Bank (columbiabank.com / umpquabank.com) on their public leak site. According to the posting, the attack compromised credentials belonging to one employee and exposed data from 445 users, along with five third-party employee credentials. The group also identified 39 points on the victim's external attack surface, suggesting reconnaissance or exploitation of internet-facing assets. The claim does not provide specifics on the attack vector, whether encryption occurred, or when the compromise took place. Columbia Bank and Umpqua Bank operate in the financial-services sector and would be high-value targets for both data theft and operational disruption.

## Mentioned in this report

- Threat actors: Clop
- Malware: Clop

2 detections for this report are in the app: the rules that match its indicators, the Sigma rules already converted to Splunk SPL, to Elastic where their fields map onto Elastic's integrations and to Microsoft Defender XDR KQL wherever Defender records the activity, and the YARA and Suricata. A new account gets three days of them free.

Source reporting: https://www.ransomware.live/id/Q09MVU1CSUFCQU5LLkNPTShVTVBRVUFCQU5LLkNPTSlAY2xvcA==

---

This is the free public brief from Vorant Threat Intelligence. When citing, attribute "Vorant" and link https://vorant.io/reports/76999029-2bfd-543b-a47d-64045587efb3/clop-ransomware-claims-columbia-bank-compromise.
In the app the same report carries its extracted indicators, its detections (Splunk SPL already written, plus Elastic and Microsoft KQL where they apply), live profiles of the actors and CVEs it names, and the vendor research on the same campaign. Slack alerts fire on the vendors, sectors and countries a reader follows. A new account starts with three days of all of it, no card: https://vorant.io/signup