WitFoo-Artifact ::: message={"device_id":"289d83eb622a40d58196e54957152b03","timestamp":"2023-08-25T11:20:20Z","behavior_id":"5737","filename":"VBCSCompiler.exe","filepath":"\\Device\\HarddiskVolume3\\PayGo\\QA_SRP_Latest\\Portal\\bin\\roslyn\\VBCSCompiler.exe","alleged_filetype":"exe","cmdline":"\"D:\\PayGo\\QA_SRP_Latest\\Portal\\bin\\roslyn\\VBCSCompiler.exe\" \"-pipename:alice.F.A34eygCs1aJfPpzR6O_cjJw2t\"","scenario":"NGAV","objective":"Falcon Detection Method","tactic":"Mumbrellaine Learning","tactic_id":"CSTA0004","technique":"Sensor-based ML","technique_id":"CST0007","display_name":"Mumbrellaine Learning Identified Medium Confidence Malicious File","description":"A file written to the file system meets the on-sensor mumbrellaine learning medium confidence threshold for malicious files. Detection is based on a high degree of entropy, packing, anti-malware evasion, or other similarity to known malware.","severity":50,"confidence":50,"ioc_type":"hash_sha256","ioc_value":"1ce7339d5637cc12a82bb8c64dc223ccb637a888cb641446c01229d1512df5d5","ioc_source":"file_write","ioc_description":"\\Device\\HarddiskVolume1\\Windows\\Microsoft.NET\\Framework64\\v4.0.30319\\Temporary ASP.NET Files\\portal\\6e657b17\\3c955147\\App_Web_kvvwjyjq.dll","user_name":"alice","user_id":"S-1-5-21-1959957726-1537299114-1298153393-1249","control_graph_id":"ctg:289d83eb622a40d58196e54957152b03:60130083149","triggering_process_graph_id":"pid:289d83eb622a40d58196e54957152b03:770815250147","sha256":"1ce7339d5637cc12a82bb8c64dc223ccb637a888cb641446c01229d1512df5d5","md5":"","parent_details":{"parent_sha256":"29fc4e96f2553c5c309ee321a18ee5ad18686b5586e64422c1a7870748ce908d","parent_md5":"7dc642657b7cb790d687332f6d18feae","parent_cmdline":"\"D:\\PayGo\\QA_SRP_Latest\\Portal\\bin\\roslyn\\csc.exe\" /shared /keepalive:\"10\" /noconfig  /fullpaths @\"C:\\Windows\\Microsoft.NET\\Framework64\\v4.0.30319\\Temporary ASP.NET Files\\portal\\6e657b17\\3c955147\\pqwjm4kv.cmdline\"","parent_process_graph_id":"pid:289d83eb622a40d58196e54957152b03:770812509131"},"pattern_disposition":128,"pattern_disposition_details":{"indicator":false,"detect":false,"inddet_mask":false,"sensor_only":false,"rooting":false,"kill_process":false,"kill_subprocess":false,"quarantine_mumbrellaine":false,"quarantine_file":true,"policy_disabled":false,"kill_parent":false,"operation_blocked":false,"process_blocked":false,"registry_operation_blocked":false,"critical_process_disabled":false,"bootup_safeguard_enabled":false,"fs_operation_blocked":false,"handle_operation_downgraded":false,"kill_action_failed":false,"blocking_unsupported_or_disabled":false,"suspend_process":false,"suspend_parent":false}} ::: clientIP=8.132.223.251 ::: fileHash=1ce7339d5637cc12a82bb8c64dc223ccb637a888cb641446c01229d1512df5d5 ::: fileName=VBCSCompiler.exe ::: filePath=\Device\HarddiskVolume3\PayGo\QA_SRP_Latest\Portal\bin\roslyn\VBCSCompiler.exe ::: userName=alice ::: clientMAC=0accca51756b ::: created_at=2023-08-25T11:20:20Z ::: streamName=Crowdstrike Detection ::: messageType=endpoint_protection_event ::: pipelineName=Crowdstrike Detection ::: severityCode=4 ::: startTimeUTC=2023-08-25T11:20:20Z ::: clientHostname=NVISAASQATWEB01.devnvi.umbrellaint.com ::: pipelineEntrypoint=dispatch
This is a syslog message from a product called Falcon by Crowdstrike. The following fields were extracted from the message:
clienthostname: NVISAASQATWEB01.devnvi.paygoint.com
clientmac: 0accca51756b
filehash: 1ce7339d5637cc12a82bb8c64dc223ccb637a888cb641446c01229d1512df5d5
filename: VBCSCompiler.exe
filepath: \Device\HarddiskVolume3\PayGo\QA_SRP_Latest\Portal\bin\roslyn\VBCSCompiler.exe
messagetype: endpoint_protection_event
productids: [7]
senderhost: kafka.precinct
sensitivity: normal
severitycode: 4
severitylabel: warning
sourceinfo: unknown
starttimeutc: 2023-08-25T11:20:20Z
tags: ['Crowdstrike Detection', 'endpoint_protection_event']
streamName: Crowdstrike Detection
clientIP: 8.132.223.251
userName: alice