Library · ATT&CK · T1055.011

Detecting Extra Window Memory Injection in AWS, Azure, and GCP

01 What is T1055.011?

Adversaries may inject malicious code into process via Extra Window Memory (EWM) in order to evade process-based defenses as well as possibly elevate privileges.

a13e DCV does not yet ship a13e-curated detection rules for T1055.011. The page is descriptive: it covers what the technique is, which platforms attackers exercise it on, and where the upstream Sigma community has rules you can translate via CloudSigma. As CloudSigma's corpus extends to this technique, the page lights up with embedded rules automatically — no manual update required.

T1055.011 sits inside MITRE ATT&CK's enterprise matrix; adversaries reach it via initial access or credential-access steps and pivot from it into impact, lateral movement, or persistence. Cloud blueprints — AWS CloudTrail, Azure Sign-in, GCP Audit Logs — are the high-fidelity observation surfaces where T1055.011 most reliably surfaces in production. DCV maps each cloud-native finding type to the technique so an a13e coverage scan tells you whether your existing detection controls cover T1055.011 before an adversary exercises it.

02 Coverage in DCV

DCV does not currently ship a cloud-audit-log finding mapped directly to T1055.011. The technique earns a library page because a13e research cites it. Detection sits downstream, on the exploitation step the technique enables.

03 Detect with CloudSigma

CloudSigma does not currently ship a stand-alone rule that fires on T1055.011 in isolation. Generate a starting-point rule from the CVE, vulnerability disclosure, or threat-research blog post that exercises this technique, then pair it with SIEM-side correlation before enabling in production.

High-fidelity detection of T1055.011 requires correlation across multiple events. For example, a credential-validation call followed by a reconnaissance chain (List* / Describe*) within a short window from an unfamiliar source. A single-event Sigma rule on GetCallerIdentity alone fires constantly on legitimate CLI, SDK and CI/CD activity.

Where you have a specific advisory, vulnerability disclosure or blog post that exercises T1055.011-style abuse, CloudSigma can generate a starting-point rule from that input. You then deploy it in your SIEM and combine it with the SIEM's native correlation features (timeframe joins across users, source-IP anomalies, impossible-travel checks). For T1055.011 specifically the generated rule is rarely sufficient on its own; pair it with the SIEM-side correlation logic before enabling in production.

04 Related techniques

05 FAQ

What is T1055.011?

Adversaries may inject malicious code into process via Extra Window Memory (EWM) in order to evade process-based defenses as well as possibly elevate privileges. EWM injection is a method of executing arbitrary code in the address space of a separate live process. Before creating a window, graphical Windows-based processes must prescribe to or register a windows class, which stipulate appearance and behavior (via windows procedures, which are functions that handle input/output of data). Registration of new windows classes can include a request for up to 40 bytes of EWM to be appended to the...

Which cloud platforms does a13e DCV cover for T1055.011?

a13e DCV does not currently map a cloud-native finding directly to T1055.011. This page is included for research and coverage-planning context; when platform mappings are added, this answer will list them.

Which SIEMs support T1055.011 detection via a13e CloudSigma?

a13e CloudSigma does not currently publish a production Sigma rule for T1055.011. When rules are added, supported SIEM dialects will appear here after SigmaHQ validation and target-SIEM conversion pass.

How many rules does a13e ship for T1055.011?

No production rules are published for T1055.011 yet. The count grows when CloudSigma ships new rules tagged to T1055.011 or when DCV adds a cloud-native finding type that maps to the technique.

How do I instrument T1055.011 detection in my own environment?

Run a free coverage scan in a13e DCV: it inspects your AWS, Azure, and GCP detection content + maps each existing detection to MITRE ATT&CK. Where T1055.011 is uncovered, DCV surfaces the gap with an actionable Sigma rule template you can copy into your SIEM. CloudSigma generates a fresh translation per SIEM dialect on demand.

Where can I see live coverage for my environment?

Run a free coverage scan in a13e DCV at https://app.a13e.com. The scan reads your existing detection content (Splunk, Sentinel, Chronicle, Elastic) and reports a per-technique coverage map against MITRE ATT&CK. The output highlights which techniques your DCV instance currently catches and which ones need new rules from CloudSigma.