Kolin Turkey Ransomware Attack by Qilin (April 2026)

Claim Summary

On April 21, 2026, the Qilin ransomware group added Kolin Turkey to their leak site, claiming to have compromised the Turkish manufacturing company. The entry lists the victim’s domain as www.kolin.com.tr and identifies the industry as manufacturing. No data samples, screenshots, or specific data volume have been released at this time. The claim remains unverified by Yazoul Security.

Threat Actor Profile

Qilin (also tracked as Agenda) is a ransomware-as-a-service operation active since mid-2022. According to public research from Secureworks (tracking as Gold Feather), Trend Micro, and Google Cloud’s threat intelligence team, Qilin has evolved from targeting Windows environments to also compromising VMware vCenter and ESXi hypervisors. The group has a known victim count of 1,617 organizations, indicating a high-volume, opportunistic targeting strategy.

Known tools associated with Qilin operations include:

• Mimikatz for credential dumping
• EDRSandBlast and PCHunter for endpoint detection and response evasion
• PowerTool for process manipulation
• Nmap and Nping for network reconnaissance
• EasyUpload.io and MEGA for data exfiltration

Qilin’s typical attack chain involves initial access via phishing, exploitation of public-facing applications, or compromised credentials. They then deploy custom PowerShell scripts to propagate across networks and encrypt systems, including VMware ESXi hosts using a custom binary.

Alleged Data Exposure

The Qilin leak site entry for Kolin Turkey does not include any data samples, file listings, or evidence of exfiltration. The data volume is listed as “Undisclosed.” This lack of proof is notable - Qilin typically posts at least a sample or screenshot to pressure victims. The absence may indicate:

• The attack is in early stages of negotiation
• The group is bluffing or exaggerating access
• Data was not successfully exfiltrated

Potential Impact

If the claim is verified, Kolin Turkey could face:

• Operational disruption to manufacturing systems and supply chain
• Potential intellectual property theft (designs, proprietary processes)
• Regulatory exposure under Turkey’s Personal Data Protection Law (KVKK) if employee or customer data is involved
• Reputational damage and loss of client trust

Kolin Turkey operates in the manufacturing sector, which is a common target for ransomware due to the high cost of downtime and reliance on legacy systems.

What to Watch For

• Leak site updates: Qilin may post data samples or a countdown timer to pressure payment
• Dark web chatter: Discussions about the data being sold or shared
• Operational disruptions: Public reports of system outages or encrypted files
• Regulatory filings: KVKK notifications if personal data is involved

YARA rules for detecting Qilin ransomware are available in public repositories (e.g., rule “Qilin_Ransomware” targeting the binary’s unique strings and encryption patterns). Organizations should also monitor for use of the tools listed above in their environments.

Disclaimer

This report is based on an unverified claim posted by the Qilin ransomware group on their leak site. Yazoul Security has not independently confirmed the compromise of Kolin Turkey’s systems. Ransomware groups frequently exaggerate or fabricate claims to pressure victims into payment. All information should be treated as preliminary and subject to verification. No data samples, download links, or access credentials are provided in this report.