Active Scanning: Сканирование блоков IP-адресов
Other sub-techniques of Active Scanning (3)
Adversaries may scan victim IP blocks to gather information that can be used during targeting. Public IP addresses may be allocated to organizations by block, or a range of sequential addresses. Adversaries may scan IP blocks in order to Gather Victim Network Information, such as which IP addresses are actively in use as well as more detailed information about hosts assigned these addresses. Scans may range from simple pings (ICMP requests and responses) to more nuanced scans that may reveal host software/versions via server banners or other network artifacts.(Citation: Botnet Scan) Information from these scans may reveal opportunities for other forms of reconnaissance (ex: Search Open Websites/Domains or Search Open Technical Databases), establishing operational resources (ex: Develop Capabilities or Obtain Capabilities), and/or initial access (ex: External Remote Services).
Примеры процедур |
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| Название | Описание |
|---|---|
| TeamTNT |
TeamTNT has scanned specific lists of target IP addresses.(Citation: Trend Micro TeamTNT) |
| Ember Bear |
Ember Bear has targeted IP ranges for vulnerability scanning related to government and critical infrastructure organizations.(Citation: CISA GRU29155 2024) |
Контрмеры |
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| Контрмера | Описание |
|---|---|
| Pre-compromise |
Pre-compromise mitigations involve proactive measures and defenses implemented to prevent adversaries from successfully identifying and exploiting weaknesses during the Reconnaissance and Resource Development phases of an attack. These activities focus on reducing an organization's attack surface, identify adversarial preparation efforts, and increase the difficulty for attackers to conduct successful operations. This mitigation can be implemented through the following measures: Limit Information Exposure: - Regularly audit and sanitize publicly available data, including job posts, websites, and social media. - Use tools like OSINT monitoring platforms (e.g., SpiderFoot, Recon-ng) to identify leaked information. Protect Domain and DNS Infrastructure: - Enable DNSSEC and use WHOIS privacy protection. - Monitor for domain hijacking or lookalike domains using services like RiskIQ or DomainTools. External Monitoring: - Use tools like Shodan, Censys to monitor your external attack surface. - Deploy external vulnerability scanners to proactively address weaknesses. Threat Intelligence: - Leverage platforms like MISP, Recorded Future, or Anomali to track adversarial infrastructure, tools, and activity. Content and Email Protections: - Use email security solutions like Proofpoint, Microsoft Defender for Office 365, or Mimecast. - Enforce SPF/DKIM/DMARC policies to protect against email spoofing. Training and Awareness: - Educate employees on identifying phishing attempts, securing their social media, and avoiding information leaks. |
Обнаружение
Monitor for suspicious network traffic that could be indicative of scanning, such as large quantities originating from a single source (especially if the source is known to be associated with an adversary/botnet). Much of this activity may have a very high occurrence and associated false positive rate, as well as potentially taking place outside the visibility of the target organization, making detection difficult for defenders. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Initial Access.
Ссылки
- Fiser, D. Oliveira, A. (n.d.). Tracking the Activities of TeamTNT A Closer Look at a Cloud-Focused Malicious Actor Group. Retrieved September 22, 2021.
- Dainotti, A. et al. (2012). Analysis of a “/0” Stealth Scan from a Botnet. Retrieved October 20, 2020.
- US Cybersecurity & Infrastructure Security Agency et al. (2024, September 5). Russian Military Cyber Actors Target U.S. and Global Critical Infrastructure. Retrieved September 6, 2024.
| Риск | Связи | |
|---|---|---|
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Раскрытие информации об ИТ инфраструктуре
из-за
возможности сканирования IP адресов
в публичном IP-адресе
Конфиденциальность
Раскрытие информации
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Раскрытие информации об ИТ инфраструктуре
из-за
возможности сканирования IP адресов
в локальной сети
Конфиденциальность
Раскрытие информации
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