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sourcetype=f5:silverline:asm irule=* vs_ip=* | rex "(?<log>.*)" | eval log_stripped = replace(log, "\\\\","") | rex field=log_stripped "data=\"(?<data_section>.*?)\", irule=" | spath input=data_section |
Groundspeed Violation/Improbable Access
Oftentimes we are required to determine impossible or improbably access events. Typically, this is a relatively simple thing to do in a modern SIEM, however Splunk, without ESS, does not have a “great” way to handle this type of temporal correlation aside from appends or joins back to the original data. I constructed the following […]
Investigate by MAC, IP all VPN authentications through CISCO_ISE
Helps to investigate authentications through CISCO_ISE device. This identifies who logs in, the MAC address and IP for any use cases
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index=<your cisco index> "<your IP>" |rex field="cisco_av_pair" "mdm-tlv=device-mac=(?<MAC_ID>\w+-\w+-\w+-\w+-\w+-\w+)" |rex field="cisco_av_pair" "mdm-tlv=device-platform=(?<OS>\w+)" |rex field=_raw "(?<IP><IP regex>)" |iplocation IP |stats c sum(Acct_Input_Packets) as Packets_In sum(Acct_Output_Packets) as Packets_Out by _time User_Name Framed_Protocol src_mac City Country Region IP MAC_ID OS Acct_Status_Type |rename _time as Time RequestLatency as LoadTime Acct_Status_Type as Status IP as <your choice> |convert ctime(Time) |fields + Time User_Name MAC_ID OS "SourceIP - DestIP" City Country Region Framed_Protocol Status Packets_Out Packets_In |
Investigate an IP through Palo Alto Logs
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index= <strong><your palo alto index> <IP you want to investigate></strong> |stats c sum(bytes) as Bytes_Out by _time user application action dest_ip dest_location src_ip client_ip client_location session_end_reason "app:able_to_transfer_file" "app:has_known_vulnerability" "app:prone_to_misuse" "app:used_by_malware" "app:evasive" |fields + _time user application action dest_ip dest_location client_ip client_location Bytes_Out session_end_reason "app:able_to_transfer_file" "app:has_known_vulnerability" "app:prone_to_misuse" "app:used_by_malware" "app:evasive" |rename client_ip as SourceIP |fields - user session_end_reason "app:prone_to_misuse" "app:used_by_malware" "app:evasive" dest_ip |
Search All Traffic by src / action – Creates Table
This is a magical query for tracking down all internal resources connecting to or from external IPs and Countries
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src!=10.0.0.0/8 AND src!=192.168.0.0/12 AND src!=192.168.0.0/16 action="allowed" | iplocation src | search Country=* | table Country, src, action, bytes_out, packets_out | dedup src | sort Country |
Blocked Firewall Scanning Activity with indicator if Source has been allowed.
This search is still a work in progress, but thought I would go ahead and post it. Currently use OPNsense firewall in my house. The purpose of the search is to identify blocked scanning activity on my firewall that does a 2nd search via a join to add if any src_ip that had been blocked […]
