Qilin Ransomware Group Claims Breach of Sivatel Bangkok Hotel in Thailand

The controversial ransomware gang Qilin takes credit for attacking one of Thailand’s most exclusive hotels, Sivatel Bangkok, by listing it on their dark web leak site on June 21, 2026.

The ransomware group has demanded that a representative from the hotel contact them immediately; if not, they threaten to publish all recently accessed data from the hotel on the internet. Also, the gang listed the domain name of the hotel, sivatelbangkok.com, on their Ransomware Group’s Victim List.

The attack indicates an increase in the amount of hacking that is targeting the hotel business, which may not be a surprise as the hospitality industry handles a great deal of sensitive personal information about guests, such as passports, payment methods and travel history. Therefore, the sector remains highly susceptible to hacking activities.

Hotel Industry Faces Rising Cyber Threats

The hotel industry has recorded increased cyber threats in recent years, as Sivatel Bangkok also adds to the list of hospitality businesses that have experienced a ransomware attack. This industry is a top target for hackers because of the sensitive nature of the information available in guest booking systems, which include, at a minimum, personal information of the guests, their payment card information and sometimes scans of their passports.

The problem extends across continents. In Europe, a recent breach at a Dutch hotel group exposed guest information across more than 100 properties, demonstrating the scale of the threat facing the hospitality sector.

Qilin employs a double extortion method in attacks, whereby they access a company’s data and encrypt it, then steal it and threaten to publish the data on the internet if the company does not pay a ransom to stop the publication. This adds additional pressure on a company: if the hotel is able to restore its systems via backups, the company is still at risk of exposure of its data.

This particular incident at Sivatel Bangkok has not been confirmed by any third parties or by Sivatel. Security researchers have noted that a majority of ransomware attacks are reported on data leak websites before the victims confirm the attack to the public.

Qilin’s Growing Presence in Thailand

This is not Qilin’s first attack on a Thai organization. The group previously targeted Milott Laboratories in January 2026 and Envelex Thailand in February 2026. ThaiCERT, the country’s national computer emergency response team, has issued a warning regarding Qilin’s activities and its use of advanced means of evasion to hide from detection.

Qilin uses sophisticated techniques to avoid detection. The group employs vulnerable drivers to disable security software before launching attacks. They can shut down more than 300 different security products from various vendors – the malware runs in memory, making it harder to detect.

The group follows a patient approach to attacks. They do not encrypt systems right away. Instead, they spend time inside the network, moving between systems and expanding their control. The encryption may come days after the initial breach.

What this Means for Travelers

When a hotel suffers a cyber-attack, guests may face exposure to certain risks for many years afterward. Attackers can use the stolen personal data in identity theft or fraud schemes. If you have stayed at one of such hotels, monitoring your accounts closely for unusual activity is a good idea.

Hotels hold some of the most valuable personal data people have. Passport numbers, home addresses, and payment details are all stored in hotel systems. A breach can expose all of this information at once.

Security experts recommend that hotels invest in stronger defenses. This includes monitoring for driver installations, keeping systems patched, and using multi-layered security. Hotels should also have incident response plans ready in case of an attack.