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The provided information concerns an OSINT (Open Source Intelligence) analysis of an IRC-based botnet, specifically linked to the 'tsunami' malware family. IRC (Internet Relay Chat) botnets are a type of botnet that use IRC channels as command and control (C2) infrastructure to coordinate compromised hosts. The 'tsunami' botnet is known for its capability to conduct distributed denial-of-service (DDoS) attacks, particularly flooding attacks that overwhelm targeted systems or networks, impacting their availability. This analysis, published by CIRCL in April 2019, categorizes the threat as a campaign with a low severity rating and a moderate certainty level (50%). The botnet operates perpetually, indicating ongoing activity or persistent threat presence. The technical details suggest a moderate threat level (3 out of an unspecified scale) and a moderate analysis confidence (2 out of an unspecified scale). No specific affected versions or patches are listed, and there are no known exploits in the wild beyond the botnet's operational activity. The absence of specific indicators or CWEs limits detailed technical dissection, but the association with DDoS flooding attacks highlights the primary risk vector: availability disruption through volumetric network attacks. The IRC-based control mechanism implies that the botnet can be resilient and flexible, as IRC infrastructure is relatively simple to deploy and can be obscured or migrated to evade takedown efforts. Overall, this threat represents a persistent, low-severity risk primarily focused on availability disruption via DDoS attacks orchestrated through IRC-based botnet infrastructure.

Detailed information about OSINT -  Analysis of an IRC based Botnet. Get real-time updates, technical details, and mitigation strategies.

OSINT -  Analysis of an IRC based Botnet - Live Threat Intelligence - Threat Radar | OffSeq.com

OSINT -  Analysis of an IRC based Botnet

CoalaBot is a botnet tool primarily used to conduct HTTP-based Distributed Denial of Service (DDoS) attacks, specifically leveraging amplification techniques to overwhelm targeted web servers or services. As a DDoS bot, CoalaBot operates by coordinating multiple compromised systems to send a high volume of HTTP requests, thereby exhausting the target's resources and causing service disruption or downtime. The amplification aspect suggests that the botnet exploits certain vulnerabilities or misconfigurations in network protocols or services to multiply the volume of attack traffic beyond the initial input, increasing the effectiveness of the attack. Although the exact technical mechanisms of CoalaBot's amplification are not detailed in the provided information, HTTP amplification typically involves exploiting HTTP headers or leveraging open proxies to increase traffic volume. The campaign was identified and documented by CIRCL in 2017, and it is categorized with a low severity rating, indicating limited impact or ease of mitigation at the time of discovery. No specific affected software versions or patches are listed, and there are no known exploits in the wild reported, which may imply that CoalaBot is either not widely deployed or that its impact has been contained. The threat level and analysis scores (3 and 2 respectively) suggest moderate confidence in the botnet's capabilities but limited evidence of widespread exploitation. Overall, CoalaBot represents a typical HTTP amplification DDoS threat that can disrupt availability of targeted web services by flooding them with amplified HTTP traffic from a distributed network of compromised hosts.

Detailed information about OSINT - CoalaBot: http Ddos Bot. Get real-time updates, technical details, and mitigation strategies.

OSINT - CoalaBot: http Ddos Bot - Live Threat Intelligence - Threat Radar | OffSeq.com

OSINT - CoalaBot: http Ddos Bot

OSINT - BlackNurse Denial of Service Attack

The BlackNurse Denial of Service (DoS) attack is a low-bandwidth, high-impact denial of service technique that exploits the ICMP Type 3 Code 3 (Destination Unreachable - Port Unreachable) messages to overwhelm target systems. Unlike traditional volumetric DDoS attacks that rely on massive traffic volumes, BlackNurse uses relatively low traffic rates to cause significant CPU load on firewalls and network devices, leading to service degradation or outages. The attack targets the availability of network infrastructure by exploiting how certain firewalls and routers process ICMP error messages, causing them to consume excessive resources and become unresponsive. This technique is notable for its efficiency, requiring less bandwidth to achieve disruption compared to typical flood attacks. The campaign was publicly documented around 2016, with no specific affected product versions identified, indicating a broad potential impact on network devices that inadequately handle ICMP error processing. Although no known exploits in the wild are reported, the threat remains relevant due to the fundamental nature of the ICMP protocol and the widespread use of vulnerable network equipment. The low severity rating reflects the attack's limited scope and the requirement for the attacker to send ICMP packets to the target network, but the potential for service disruption remains significant, especially for organizations relying heavily on affected firewall or router models.

Detailed information about OSINT - BlackNurse Denial of Service Attack. Get real-time updates, technical details, and mitigation strategies.

Title	Severity	Type	Source	Date

Threats Tagged 'ecsirt:availability="ddos"'

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