Acquire Infrastructure: Web Services `T1583.006`

Tactic: Resource Development

Adversaries may register for web services that can be used during targeting. A variety of popular websites exist for adversaries to register for a web-based service that can be abused during later stages of the adversary lifecycle, such as during Command and Control (Web Service), Exfiltration Over Web Service, or Phishing. Using common services, such as those offered by Google, GitHub, or Twitter, makes it easier for adversaries to hide in expected noise. By utilizing a web service, adversaries can make it difficult to physically tie back operations to them.

Authoring guide

These 2 rules share fields, values, and exclusions.

Fields filtered most (4 distinct)

These fields appear most often in rule filters.

Field	Rules	How	Sample values
`EventType`	2	`eq` 2	`intrusionevent`, `repo.create`
`TriggerCount`	1	`eq` 1	`1`
`event.dataset`	1	`eq` 1	`github.audit`
`sourcetype`	1	`eq` 1	`cisco:sfw:estreamer`

Top indicator values (5 distinct)

These values appear most often in rule predicates.

Field	Kind	Value	Rules (here)	Corpus reach
`EventType`	`eq`	`intrusionevent` splunkCisco Secure Firewall - Rare Snort Rule Triggered	1	18
`EventType`	`eq`	`repo.create` elasticGitHub Repo Created	1
`TriggerCount`	`eq`	`1` splunkCisco Secure Firewall - Rare Snort Rule Triggered	1
`event.dataset`	`eq`	`github.audit` elasticGitHub Repo Created	1	14
`sourcetype`	`eq`	`cisco:sfw:estreamer` splunkCisco Secure Firewall - Rare Snort Rule Triggered	1	32

Rules under this technique

These vendors publish rules tagged with this technique.

Elastic 1 rule

GitHub Repo Created

Splunk 1 rule

Cisco Secure Firewall - Rare Snort Rule Triggered