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Top attack vectors: September 2021

ID: 47a7fb20-6c98-5109-95e6-e7f42b1c8892

STIX ID: report--47a7fb20-6c98-5109-95e6-e7f42b1c8892

Feed Name: Expel Blog

Threat Score
70/100

Date Published: 2021-10-14

Date Updated: 2026-04-27

Author: Britton Manahan

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This September 2021 SOC report highlights three main threats: exploitation of public-facing vulnerabilities (notably CVE-2020-36239 and CVE-2021-26084) repeatedly used to deploy XMRig cryptominers; widespread use of PowerShell and .NET by malware (e.g., SolarMarker) to obfuscate payloads; and a majority of critical incidents being BEC, with attackers increasingly harvesting SSO credentials (Okta) to move into cloud apps — the report provides detection signals and actionable resilience recommendations such as EDR, MFA, PowerShell logging, patching, and WAFs.

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