A watering hole attack is a sophisticated security exploit that targets specific groups of end users by infecting websites that members of the group are known to visit. The attacker’s goal is to compromise a targeted user’s computer and gain access to the network at the target’s workplace. This type of attack is named after hunting techniques, where the hunter waits near a body of water, known as a watering hole, for prey to come and drink.
In the tech world, the targets of watering hole attacks can be individuals, organizations, or groups. Attackers typically profile their targets, such as employees of large enterprises, human rights organizations, religious groups, or government offices, to determine the websites they frequent. These websites are often messaging boards or general interest sites popular with the intended targets.
Although watering hole attacks are not as common as other cyber threats, they are challenging to detect and can pose a significant risk to highly secure organizations. Attackers often target less security-conscious employees, business partners, or vendors to breach multiple layers of security.
Watering hole attacks are a form of social engineering attack and are also known as water-holing, water hole attacks, or strategically compromised websites. The attack involves a chain of events initiated by the attacker to gain access to a victim, without directly targeting the victim. The attacker first identifies a legitimate website already used by the victim and injects malicious code into the site. When the victim visits the compromised site, the malicious payload is triggered, infecting their computer and initiating an exploit chain to gain access to the network.
Once the attacker gains access to the victim’s computer, they can exploit other assets on the network and launch pivot attacks to achieve nefarious goals. Signs of a watering hole attack include computer performance issues, system slowdowns, unexplained crashes, changes to browser settings, missing files, pop-ups directing to specific websites, and new applications downloaded on the device.
To prevent watering hole attacks, organizations can follow best practices for computer security, avoid allowing personal use of corporate resources, refrain from adding trusts to third-party sites, train users to recognize suspicious behavior, and scan and monitor internet traffic.
Examples of notable watering hole attacks include the 2016 attack on the International Civil Aviation Organization, the 2017 cyberattacks on Ukrainian government websites, the 2020 SolarWinds attack, a watering hole attack on a Japanese university research lab website in 2023, and the SilentSelfie attack on Kurdish minority websites in 2024.
In conclusion, watering hole attacks are a serious cybersecurity threat that organizations and individuals need to be aware of and take proactive measures to prevent. By understanding the tactics used by attackers and implementing strong security measures, the risk of falling victim to such attacks can be significantly reduced. Stay vigilant and report any suspicious activity to IT security teams immediately.