indicators of compromise

  1. CVE-2025-53737: Excel Heap Overflow - Patch, Detect, and Defend

    Quick clarification before I write the 2,000+ word WindowsForum-style article: I searched the files you provided and they repeatedly reference a closely numbered Excel heap‑overflow CVE as CVE‑2025‑53741 (Microsoft’s Security Update Guide entry) rather than CVE‑2025‑53737. c: CVE‑2025‑53737...
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    • cve-2025-53737 defense in depth excel heap overflow excel vulnerability hunting-queries incident response indicators of compromise msrc advisory office security patch management security best practices security patch threat hunting vulnerability windows security
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  2. CVE-2025-53770: SharePoint ToolShell RCE Exploit — Timeline, Impact, Mitigations

    Thanks — quick clarification before I start the 2,000+ word feature. I searched public sources and could not find any authoritative record for CVE-2025-53760. The Microsoft SharePoint incident widely reported in July–August 2025 is CVE-2025-53770 (aka “ToolShell”) — a deserialization / RCE chain...
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    • cve-2025-53770 cybersecurity defender deserialization edr incident response indicators of compromise iocs msrc nvd on-premises rce sharepoint threat hunting toolshell vulnerability waf
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  3. Critical Fortinet Vulnerability Update: Protect Your Systems Now

    The world of cybersecurity is riddled with Harlequin jests and serious risks, and Fortinet has recently stepped into the spotlight with an urgent update regarding a critical security vulnerability in their FortiManager product (CVE-2024-47575). This vulnerability poses a significant threat...
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    • cisa cve-2024-47575 cybersecurity fortinet indicators of compromise patch management vulnerability
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  4. AA21-336A: APT Actors Exploiting CVE-2021-44077 in Zoho ManageEngine ServiceDesk Plus

    Original release date: December 2, 2021 Summary This joint Cybersecurity Advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework, Version 9. See the ATT&CK for Enterprise framework for referenced threat actor techniques and for mitigations. This joint...
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    • active directory apt attack techniques cisa critical infrastructure cve-2021-44077 cybersecurity exploitation fbi indicators of compromise it consulting mitigation rce remote code execution service desk threat actors update vulnerability web shells zoho
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  5. VIDEO AA21-077A: Detecting Post-Compromise Threat Activity Using the CHIRP IOC Detection Tool

    Original release date: March 18, 2021 Summary This Alert announces the CISA Hunt and Incident Response Program (CHIRP) tool. CHIRP is a forensics collection tool that CISA developed to help network defenders find indicators of compromise (IOCs) associated with activity detailed in the following...
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    • apt chirp cisa communication companion tool compromise forensics guidance incident response indicators of compromise malware network defense security siem solarwinds threat activity threat detection windows yara
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  6. AA21-062A: Mitigate Microsoft Exchange Server Vulnerabilities

    Original release date: March 3, 2021 Summary Cybersecurity and Infrastructure Security (CISA) partners have observed active exploitation of vulnerabilities in Microsoft Exchange Server products. Successful exploitation of these vulnerabilities allows an unauthenticated attacker to execute...
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    • active directory cve-2021-26855 cybersecurity exchange server forensics incident response indicators of compromise malicious software microsoft mitigation monitoring network security patch remote code execution security tactics threat intelligence user agent vulnerabilities web shells
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  7. AA20-245A: Technical Approaches to Uncovering and Remediating Malicious Activity

    Original release date: September 1, 2020 Summary This joint advisory is the result of a collaborative research effort by the cybersecurity authorities of five nations: Australia,[Link Removed] Canada,[2] New Zealand,[3][4] the United Kingdom,[5] and the United States.[Link Removed] It...
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    • access control cybersecurity data exfiltration data security firewall incident management incident response indicators of compromise log management malicious software mitigation monitoring network security network segmentation remote access system administration threat analysis user education user training vulnerability
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  8. AA20-107A: Continued Threat Actor Exploitation Post Pulse Secure VPN Patching

    Original release date: April 16, 2020 | Last revised: June 30, 2020 Summary Note: This Activity Alert uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework. See the ATT&CK for Enterprise framework for all referenced threat actor techniques and mitigations...
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    • active directory cisa credential dumping cve-2019-11510 cybersecurity detection exploitation incident response indicators of compromise iocs lateral movement mitigation network security pulse secure ransomware remote access remote services threat actors vpn vulnerability
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  9. AA20-183A: Defending Against Malicious Cyber Activity Originating from Tor

    Original release date: July 1, 2020 Summary This advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) and Pre-ATT&CK framework. See the ATT&CK for Enterprise and Pre-ATT&CK frameworks for referenced threat actor techniques. This advisory—written by the...
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    • anonymity apt cisa command and control cybersecurity data exfiltration data manipulation denial of service exploitation fbi incident response indicators of compromise malicious software network monitoring network security reconnaissance risk mitigation security software threat actors tor
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  10. AA20-107A: Continued Threat Actor Exploitation Post Pulse Secure VPN Patching

    Original release date: April 16, 2020 Summary Note: This Activity Alert uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework. See the ATT&CK for Enterprise framework for all referenced threat actor techniques and mitigations. This Alert provides an update...
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    • active directory credential theft cve-2019-11510 cyber threats cybersecurity data exfiltration detection exploitation incident response indicators of compromise lateral movement malware mitigation network security patch management pulse secure remote access threat actors vpn vulnerability
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    • Forum: Security Alerts

  11. AA20-099A: COVID-19 Exploited by Malicious Cyber Actors

    Original release date: April 8, 2020 Summary This is a joint alert from the United States Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA) and the United Kingdom’s National Cyber Security Centre (NCSC). This alert provides information on...
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    • apt groups cisa covid 19 credential theft cyber threats cybersecurity exploitation indicators of compromise malicious software malware mitigation ncsc phishing ransomware remote access scam social engineering teleconferencing telework vpn
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  12. AA19-339A: Dridex Malware

    Original release date: December 5, 2019 Summary This Alert is the result of recent collaboration between the Department of the Treasury Financial Sector Cyber Information Group (CIG) and the Department of the Treasury’s Financial Crimes Enforcement Network (FinCEN) to identify and share...
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    • bots cisa cybersecurity data breach dridex exploit financial fincen indicators of compromise intrusion detection intrusion prevention malspam malware mitigation phishing privacy ransomware security best practices trojan vulnerabilities
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  13. TA18-275A: HIDDEN COBRA – FASTCash Campaign

    Original release date: October 2, 2018 | Last revised: December 21, 2018 Systems Affected Retail Payment Systems Overview This joint Technical Alert (TA) is the result of analytic efforts between the Department of Homeland Security (DHS), the Department of the Treasury (Treasury), and the...
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    • access denied atm fraud banking cyberattack cybersecurity dhs fastcash fbi financial transactions hidden cobra incident response indicators of compromise iso 8583 malware mitigation network exploitation payment methods security best practices spear phishing threat intelligence
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  14. TA18-149A: HIDDEN COBRA – Joanap Backdoor Trojan and Brambul Server Message Block Worm

    Original release date: May 29, 2018 Systems Affected Network systems Overview This joint Technical Alert (TA) is the result of analytic efforts between the Department of Homeland Security (DHS) and the Federal Bureau of Investigation (FBI). Working with U.S. government partners, DHS and FBI...
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    • brambul brute force cybersecurity dhs fbi hidden cobra indicators of compromise intrusion detection ip address joanap malware mitigation network defense network security remote access security server message block trojan worm
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  15. TA18-106A: Russian State-Sponsored Cyber Actors Targeting Network Infrastructure Devices

    Original release date: April 16, 2018 Systems Affected Generic Routing Encapsulation (GRE) Enabled Devices Cisco Smart Install (SMI) Enabled Devices Simple Network Management Protocol (SNMP) Enabled Network Devices Overview This joint Technical Alert (TA) is the result of analytic efforts...
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    • command and control critical infrastructure cybersecurity dhs espionage exploitation fbi hacking indicators of compromise infrastructure international security legacy protocols malware mitigation network devices russian actors smart install snmp telnet tftp
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  16. TA18-074A: Russian Government Cyber Activity Targeting Energy and Other Critical Infrastructure Sectors

    Original release date: March 15, 2018 Systems Affected Domain Controllers File Servers Email Servers Overview This joint Technical Alert (TA) is the result of analytic efforts between the Department of Homeland Security (DHS) and the Federal Bureau of Investigation (FBI). This alert...
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    • critical infrastructure cyber kill chain cybersecurity dhs email security energy sector fbi incident response indicators of compromise industrial control systems intrusion detection malicious software malware network security remote access russian politics spear phishing technical alert threat actors watering hole attack
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  17. TA17-318B: HIDDEN COBRA – North Korean Trojan: Volgmer

    Original release date: November 14, 2017 Systems Affected Network systems Overview This joint Technical Alert (TA) is the result of analytic efforts between the Department of Homeland Security (DHS) and the Federal Bureau of Investigation (FBI). Working with U.S. government partners, DHS...
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    • backdoor trojan botnet cybersecurity dhs fbi hidden cobra incident response indicators of compromise ip address malicious software malware mitigation network defense network security north korea spear phishing trojan user agent volgmer
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  18. TA17-318A: HIDDEN COBRA – North Korean Remote Administration Tool: FALLCHILL

    Original release date: November 14, 2017 Systems Affected Network systems Overview This joint Technical Alert (TA) is the result of analytic efforts between the Department of Homeland Security (DHS) and the Federal Bureau of Investigation (FBI). Working with U.S. government partners, DHS...
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    • command and control cyber threat reporting cybersecurity dhs fallchill fbi hidden cobra incident response indicators of compromise ip address malware mitigation network defense network security north korea remote administration tool system information tls
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  19. TA17-293A: Advanced Persistent Threat Activity Targeting Energy and Other Critical...

    Original release date: October 20, 2017 Systems Affected Domain Controllers File Servers Email Servers Overview This joint Technical Alert (TA) is the result of analytic efforts between the Department of Homeland Security (DHS) and the Federal Bureau of Investigation (FBI). This alert...
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    • apt credential harvesting cyber espionage cybersecurity dhs energy sector fbi ics incident response indicators of compromise industrial control systems malicious software malware network security scada spear phishing staging targets technical alert threat detection watering hole attack
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  20. TA17-164A: HIDDEN COBRA – North Korea’s DDoS Botnet Infrastructure

    Original release date: June 13, 2017 | Last revised: July 07, 2017 Systems Affected Networked Systems Overview This joint Technical Alert (TA) is the result of analytic efforts between the Department of Homeland Security (DHS) and the Federal Bureau of Investigation (FBI). This alert...
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    • botnet cyber threats cybersecurity ddos deltacharlie dhs fbi hidden cobra incident response indicators of compromise ip address lazarus malware mitigation network security north korea patch management security advisory threat intelligence vulnerabilities
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