ATT&CK technique · T1566.001
Phishing: Spearphishing Attachment
Initial Access· seen in 7 CISA KEV exploits
Full description, procedures and detections on attack.mitre.org
Who uses it
ATT&CK groups and malware with this technique. Highlighted: in SecurityTabs news this month.
Weaknesses that lead here
Classes of exploited vulnerability that CTID maps to this technique.
- CWE-201 KEV CVEImproper Input ValidationInput isn't checked against what the program expects; the umbrella cause behind many specific flaws.
- CWE-6931 KEV CVEProtection Mechanism FailureA security feature exists but can be bypassed or doesn't engage when it should.
- CWE-8431 KEV CVEAccess of Resource Using Incompatible Type ('Type Confusion')An object is treated as the wrong type; a favourite in browser and JavaScript-engine exploits.
Controls that mitigate it (12)
NIST SP 800-53 rev5, grouped by family (CTID mapping).
AC · Access Control
CA · Security Assessment and Authorization
CM · Configuration Management
IA · Identification and Authentication
SC · System and Communications Protection
SI · System and Information Integrity
Weaknesses from each CVE's CVE Record (CWE, © MITRE). Techniques: MITRE ATT&CK®. Technique ↔ control and CVE ↔ technique links: Center for Threat-Informed Defense Mappings Explorer (NIST SP 800-53 rev5; CISA KEV). Plain-language explainers are SecurityTabs editorial.