From 216d06ef3067c5f96bcb76d8ebfe751f70e7a3a8 Mon Sep 17 00:00:00 2001 From: Austin Songer Date: Wed, 22 Sep 2021 14:28:02 -0500 Subject: [PATCH] [New Rule] AWS STS GetSessionToken Abuse (#1213) * Update impact_iam_deactivate_mfa_device.toml https://github.com/elastic/detection-rules/issues/1111 * Update impact_iam_deactivate_mfa_device.toml * Update discovery_post_exploitation_external_ip_lookup.toml "*ipapi.co", "*ip-lookup.net", "*ipstack.com" * Update rules/aws/impact_iam_deactivate_mfa_device.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> * Revert "Update discovery_post_exploitation_external_ip_lookup.toml" This reverts commit b57fd60c9511e20a336d32a9c9b8d5cf9954c50e. * Update * New Rule: Okta User Attempted Unauthorized Access * Update privilege_escalation_okta_user_attempted_unauthorized_access.toml * Update privilege_escalation_okta_user_attempted_unauthorized_access.toml * Delete privilege_escalation_okta_user_attempted_unauthorized_access.toml * Create persistence_new-or-modified-federation-domain.toml * Delete persistence_new-or-modified-federation-domain.toml * Create lateral_movement_sts_getsessiontoken_abuse.toml * Rename lateral_movement_sts_getsessiontoken_abuse.toml to privilege_escalation_sts_getsessiontoken_abuse.toml * Update privilege_escalation_sts_getsessiontoken_abuse.toml * Update rules/aws/privilege_escalation_sts_getsessiontoken_abuse.toml Co-authored-by: Justin Ibarra * Update .gitignore Co-authored-by: Justin Ibarra * Update privilege_escalation_sts_getsessiontoken_abuse.toml * Update privilege_escalation_sts_getsessiontoken_abuse.toml * Update * Update rules/integrations/aws/privilege_escalation_sts_getsessiontoken_abuse.toml Co-authored-by: Jonhnathan Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-authored-by: Justin Ibarra Co-authored-by: Jonhnathan (cherry picked from commit 93b8038d7d414d7030d8ab1adff4ec0d23aabc43) --- ..._escalation_sts_getsessiontoken_abuse.toml | 71 +++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 rules/integrations/aws/privilege_escalation_sts_getsessiontoken_abuse.toml diff --git a/rules/integrations/aws/privilege_escalation_sts_getsessiontoken_abuse.toml b/rules/integrations/aws/privilege_escalation_sts_getsessiontoken_abuse.toml new file mode 100644 index 00000000000..43c758273bb --- /dev/null +++ b/rules/integrations/aws/privilege_escalation_sts_getsessiontoken_abuse.toml @@ -0,0 +1,71 @@ +[metadata] +creation_date = "2021/05/17" +maturity = "production" +updated_date = "2021/07/24" + +[rule] +author = ["Austin Songer"] +description = """ +Identifies the suspicious use of GetSessionToken. Tokens could be created and used by attackers to move laterally and +escalate privileges. +""" +false_positives = [ + """ + GetSessionToken may be done by a system or network administrator. Verify whether the user identity, user + agent, and/or hostname should be making changes in your environment. GetSessionToken from unfamiliar users or + hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule. + """, +] +index = ["filebeat-*", "logs-aws*"] +language = "kuery" +license = "Elastic License v2" +name = "AWS STS GetSessionToken Abuse" +note = """## Config + +The AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.""" +references = [ + "https://docs.aws.amazon.com/STS/latest/APIReference/API_GetSessionToken.html", +] + +risk_score = 21 +rule_id = "b45ab1d2-712f-4f01-a751-df3826969807" +severity = "low" +tags = ["Elastic", "Cloud", "AWS", "Continuous Monitoring", "SecOps", "Identity and Access"] +timestamp_override = "event.ingested" +type = "query" + +query = ''' +event.dataset:aws.cloudtrail and event.provider:sts.amazonaws.com and event.action:GetSessionToken and +aws.cloudtrail.user_identity.type:IAMUser and event.outcome:success +''' + + +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1548" +name = "Abuse Elevation Control Mechanism" +reference = "https://attack.mitre.org/techniques/T1548/" + + +[rule.threat.tactic] +id = "TA0004" +name = "Privilege Escalation" +reference = "https://attack.mitre.org/tactics/TA0004/" +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1550" +name = "Use Alternate Authentication Material" +reference = "https://attack.mitre.org/techniques/T1550/" +[[rule.threat.technique.subtechnique]] +id = "T1550.001" +name = "Application Access Token" +reference = "https://attack.mitre.org/techniques/T1550/001/" + + + +[rule.threat.tactic] +id = "TA0008" +name = "Lateral Movement" +reference = "https://attack.mitre.org/tactics/TA0008/"