Account Manipulation: Device Registration T1098.005
Tactics: Persistence, Privilege Escalation
Adversaries may register a device to an adversary-controlled account. Devices may be registered in a multifactor authentication (MFA) system, which handles authentication to the network, or in a device management system, which handles device access and compliance.
Authoring guide
Patterns shared across the 22 rules above: which fields they filter on, what specific values they look for, and what they exclude. The catalog normalizes field names across vendors so Sigma's Image, Elastic's process.name, and Splunk's process_name collapse into one row. Each rule contributes at most once per row.
Fields filtered most (65 distinct)
The fields most rules look at when detecting this technique. The How column shows the operators authors use (eq, wildcard, regex_match, match) and how often each appears. Sample values are concrete examples to start from, not an exhaustive list.
Top indicator values (171 distinct)
Specific (field, operator, value) combinations the rules check for, ranked by how many rules under this technique use each one. The Corpus reach column counts how many rules across the entire catalog (any technique) check the same combination. High numbers point to widely-used indicators that are likely noisy on their own; combine them with another condition for useful signal. Blank means the combination is specific to rules under this technique. Click a value to expand the rules under this technique that use it.
Exclusions (14 distinct)
Field/operator/value combinations excluded by rules under this technique (top-level not() clauses), sorted by how many rules exclude each. These are the false-positive paths the community has learned to filter out. A new rule that ignores the high-count entries here will likely fire on the same noisy paths. Click a value to expand the rules under this technique that exclude it.
Rules under this technique
Every rule in the catalog tagged with this technique, grouped by vendor. Click a rule title for its full predicates, exclusions, and indicators.
Sigma 1 rule
Elastic 15 rules
- AWS IAM Virtual MFA Device Registration Attempt with Session Token
- Entra ID ADRS Token Request by Microsoft Authentication Broker
- Entra ID Device Registration with ROADtools Default OS Build
- Entra ID Device with ROADtools Default OS Build (Entity Analytics)
- Entra ID Microsoft Authentication Broker DRS Sign-In from Suspicious ASN
- Entra ID OAuth PRT Issuance to Non-Managed Device Detected
- Entra ID Protection User Alert and Device Registration
- Entra ID Register Device with Unusual User Agent (Azure AD Join)
- Entra ID Unusual Cloud Device Registration
- Entra ID User Sign-in with Unusual Non-Managed Device
- Google Workspace Device Registration After OAuth from Suspicious ASN
- Google Workspace Device Registration Burst for Single User
- Google Workspace User Sign-in from Atypical Device Type
- M365 Exchange MFA Notification Email Deleted or Moved
- M365 Identity OAuth Flow by User Sign-in to Device Registration