From a79f8718eb3a876bb8b1bbb4eecde4078bc19bb0 Mon Sep 17 00:00:00 2001 From: root Date: Thu, 5 Aug 2021 14:25:26 +0000 Subject: [PATCH] Added detection testing service results inIcedID Exfiltrated Archived File Creation --- ...did_exfiltrated_archived_file_creation.yml | 33 +++++++++---------- 1 file changed, 16 insertions(+), 17 deletions(-) diff --git a/detections/endpoint/icedid_exfiltrated_archived_file_creation.yml b/detections/endpoint/icedid_exfiltrated_archived_file_creation.yml index 8b118ebb46..a2f404f7bf 100644 --- a/detections/endpoint/icedid_exfiltrated_archived_file_creation.yml +++ b/detections/endpoint/icedid_exfiltrated_archived_file_creation.yml @@ -6,17 +6,17 @@ author: Teoderick Contreras, Splunk type: batch datamodel: - Endpoint -description: This search is to detect a suspicious file creation namely passff.tar and cookie.tar. - This files are possible archived of stolen browser information like history and cookies in a compromised machine with IcedID. -search: '`sysmon` EventCode= 11 (TargetFilename = "*\\passff.tar" OR TargetFilename = "*\\cookie.tar") - |stats count min(_time) as firstTime max(_time) as lastTime by TargetFilename EventCode process_id process_name Computer - | `security_content_ctime(firstTime)` - | `security_content_ctime(lastTime)` - | `icedid_exfiltrated_archived_file_creation_filter`' +description: This search is to detect a suspicious file creation namely passff.tar + and cookie.tar. This files are possible archived of stolen browser information like + history and cookies in a compromised machine with IcedID. +search: '`sysmon` EventCode= 11 (TargetFilename = "*\\passff.tar" OR TargetFilename + = "*\\cookie.tar") |stats count min(_time) as firstTime max(_time) as lastTime by + TargetFilename EventCode process_id process_name Computer | `security_content_ctime(firstTime)` + | `security_content_ctime(lastTime)` | `icedid_exfiltrated_archived_file_creation_filter`' how_to_implement: To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the - Sysmon TA. + Sysmon TA. known_false_positives: unknown references: - https://www.cisecurity.org/white-papers/security-primer-icedid/ @@ -35,22 +35,21 @@ tags: - Splunk Cloud required_fields: - _time - - TargetFilename - - EventCode - - process_id - - process_name - - Computer + - TargetFilename + - EventCode + - process_id + - process_name + - Computer security_domain: endpoint impact: 80 confidence: 90 - # (impact * confidence)/100 risk_score: 72 context: - - source: endpoint + - source: endpoint - stage: Collection message: process $SourceImage$ create a file $TargetImage$ in host $Computer$ observable: - - name: Computer + - name: Computer type: Hostname role: - Victim @@ -58,4 +57,4 @@ tags: type: process name role: - Attacker - \ No newline at end of file + automated_detection_testing: passed