[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"framework:mitre-attack\u002Ft1556":3},{"item":4,"lessons":18,"controls":44,"related":72},{"family":5,"item":6,"code":7,"title":8,"citations":9,"publisher":10,"summary_md":11,"official_text":12,"official_attribution":13,"official_url":14,"link_label":15,"note":16,"updated_at":17},"mitre-attack","t1556","T1556","Modify Authentication Process",6,"MITRE","**What attackers do.** Attackers change authentication mechanisms, such as password filters, authentication modules, identity federation settings or MFA configuration, to capture credentials or let themselves log in without proper checks. This serves Credential Access, Defence Evasion and Persistence.\n\n**How to defend.** Protect identity infrastructure as tier zero, restrict and audit changes to federation trust, authentication policies and MFA registration. Monitor for new password filters, pluggable authentication modules and changes to identity provider settings.\n\n**Signs to look for.** Look for new or changed authentication components on domain controllers or servers, added federation domains or signing certificates, MFA methods registered from unusual locations and authentication succeeding without expected checks. A common gap is that identity configuration changes are not routed to the security team.","Adversaries may modify authentication mechanisms and processes to access user credentials or enable otherwise unwarranted access to accounts. The authentication process is handled by mechanisms, such as the Local Security Authentication Server (LSASS) process and the Security Accounts Manager (SAM) on Windows, pluggable authentication modules (PAM) on Unix-based systems, and authorization plugins on MacOS systems, responsible for gathering, storing, and validating credentials. By modifying an authentication process, an adversary may be able to authenticate to a service or system without using Valid Accounts.\n\nAdversaries may maliciously modify a part of this process to either reveal credentials or bypass authentication mechanisms. Compromised credentials or access may be used to bypass access controls placed on various resources on systems within the network and may even be used for persistent access to remote systems and externally available services, such as VPNs, Outlook Web Access and remote desktop.","© The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation (MITRE ATT&CK®).","https:\u002F\u002Fattack.mitre.org\u002Ftechniques\u002FT1556\u002F","Open the technique on MITRE ATT&CK",null,"2026-10-18T15:18:43.663+00:00",{"total":9,"list":19},[20,24,28,32,36,40],{"slug":21,"title":22,"published_at":23},"rogue-mfa-providers-can-intercept-credentials-via-entra-trust-abuse","Rogue MFA Providers Can Intercept Credentials via Entra Trust Abuse","2026-09-22T22:20:19.316+00:00",{"slug":25,"title":26,"published_at":27},"north-korean-apt-deploys-stealthy-linux-toolkit-targeting-south-korean-industries","North Korean APT Deploys Stealthy Linux Toolkit Targeting South Korean Industries","2026-09-07T14:21:39.152+00:00",{"slug":29,"title":30,"published_at":31},"39-attack-vectors-undermine-passkey-authentication-trust","39 Attack Vectors Undermine Passkey Authentication Trust","2026-09-04T16:20:58.865+00:00",{"slug":33,"title":34,"published_at":35},"gunra-ransomware-exploits-unpatched-fortinet-devices-and-bypasses-mfa","Gunra Ransomware Exploits Unpatched Fortinet Devices and Bypasses MFA","2026-08-11T22:21:08.891+00:00",{"slug":37,"title":38,"published_at":39},"passkey-attacks-bypass-phishing-resistant-mfa-without-breaking-cryptography","Passkey Attacks Bypass Phishing-Resistant MFA Without Breaking Cryptography","2026-08-10T14:21:05.845+00:00",{"slug":41,"title":42,"published_at":43},"malware-hijacks-windows-hello-keys-for-stealthy-entra-id-persistence","Malware Hijacks Windows Hello Keys for Stealthy Entra ID Persistence","2026-08-07T10:21:24.935+00:00",[45,50,54,59,63,68],{"slug":46,"name":47,"problem":48,"stories":49},"endpoint-detection-response","Endpoint detection and response (EDR and XDR)","Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.",4,{"slug":51,"name":52,"problem":53,"stories":49},"phishing-resistant-mfa","Phishing-resistant MFA","A stolen password, or a user who taps Approve on a push prompt, is no longer enough to log in.",{"slug":55,"name":56,"problem":57,"stories":58},"identity-threat-detection","Identity threat detection and response (ITDR)","Attackers who log in with real, stolen credentials get noticed.",3,{"slug":60,"name":61,"problem":62,"stories":58},"privileged-access-management","Privileged access management (PAM)","Admin accounts stop being one stolen password away from control of everything.",{"slug":64,"name":65,"problem":66,"stories":67},"patch-management","Automated patch management","Known holes get closed in days, not months.",1,{"slug":69,"name":70,"problem":71,"stories":67},"network-detection-response","Network detection and response (NDR)","Attackers moving between systems inside the network get seen.",[73,79,84,88,93,98,102,106],{"family":74,"item":75,"code":76,"title":77,"together":78},"cis","6","Control 6","Access Control Management",5,{"family":80,"item":81,"code":82,"title":83,"together":49},"nist-800-53","ac-17","AC-17","Remote Access",{"family":80,"item":85,"code":86,"title":87,"together":49},"ac-2","AC-2","Account Management",{"family":89,"item":90,"code":91,"title":92,"together":49},"nist-sp","800-63","SP 800-63","SP 800-63: Digital Identity Guidelines",{"family":94,"item":95,"code":96,"title":97,"together":58},"gdpr","32","Article 32","Security of processing",{"family":74,"item":99,"code":100,"title":101,"together":58},"13","Control 13","Network Monitoring and Defense",{"family":80,"item":103,"code":104,"title":105,"together":58},"ia-5","IA-5","Authenticator Management",{"family":74,"item":107,"code":108,"title":87,"together":109},"5","Control 5",2]