DarkCrystal RAT aka DCRat – Active IOCs
March 31, 2025North Korean APT Kimsuky aka Black Banshee – Active IOCs
March 31, 2025DarkCrystal RAT aka DCRat – Active IOCs
March 31, 2025North Korean APT Kimsuky aka Black Banshee – Active IOCs
March 31, 2025Severity
High
Analysis Summary
The Mirai botnet is a type of malware that infects Internet of Things (IoT) devices, such as routers, security cameras, and other smart devices, to launch distributed denial-of-service (DDoS) attacks. The botnet was first discovered in August 2016 and quickly gained notoriety for its ability to launch some of the largest DDoS attacks ever recorded, including an attack that took down the DNS provider Dyn.
Mirai works by scanning the internet for devices that use default or easily guessable passwords, such as "admin" or "password". Once a vulnerable device is identified, the malware infects it and adds it to the botnet, which can then be used to launch DDoS attacks on a target.
Mirai is particularly effective because it can exploit the large number of poorly secured IoT devices that are connected to the internet. This makes it difficult to defend against, as many of these devices have limited processing power and memory, and may not receive regular security updates.
Since its discovery, Mirai has continued to evolve and new variants of the malware have been detected. The best defense against Mirai is to ensure that IoT devices are properly secured, with strong passwords and regular security updates. Network administrators can also use tools to monitor for unusual traffic patterns that may indicate a DDoS attack is underway.
Impact
- Server Outage
- Data Loss
- Website Downtime
Indicators of Compromise
MD5
5d307a8b9c21df988ce7751ef08d4424
58f4020cd5137922742f10fac6316879
7a4da1eaf30dfc61b083e47ea66138cf
SHA-256
3dc0afbd925f8db8098bdf4fbaaefee76416d8aeb1427606fde314cfbff58c93
d1e4292f8425525025abd564bd5f1a5514c9e6ee4ee9f76b3659449dd3a5d43
1f0a4d03383564c0cfe6f4c5fbd76babe805e11d9eeabb5fc399c239085f5064
SHA1
b664b0ef7bdc074e6a3595640c9f6c664b99112b
4dbdad895c204cd3908fe057865f28c8fa2cb209
6d17f413d33925549b3b342cd91a64cff599a50f
Remediation
- Block all threat indicators at your respective controls.
- Search for indicators of compromise (IOCs) in your environment utilizing your respective security controls.
- Never trust or open links and attachments received from unknown sources/senders.
- Upgrade your operating system.
- Enable antivirus and anti-malware software and update signature definitions on time. Using multi-layered protection is necessary to secure vulnerable assets.
- Immediately change default passwords on IoT devices to unique ones.
- Keep devices' firmware and software up to date to ensure that known vulnerabilities are patched.
- Implement firewalls and intrusion detection systems to monitor and control traffic to and from IoT devices.
- Employ tools that can identify unusual behavior or traffic patterns that might indicate a DDoS attack or a compromised device.
- Disable any unnecessary services or features on IoT devices to reduce their attack surface.
- Follow security best practices, such as disabling remote management if not needed and enabling security features provided by the device manufacturer.
- Deploy intrusion detection and prevention systems (IDS/IPS) to monitor for anomalous or malicious network activity.
- Set up alerts for unusual traffic patterns that might indicate a DDoS attack or a compromised device.