Techniques
Sample rules
Windows Gather Victim Network Info Through Ip Check Web Services
- source: splunk
- technicques:
- T1590.005
Description
The following analytic detects processes attempting to connect to known IP check web services. This behavior is identified using Sysmon EventCode 22 logs, specifically monitoring DNS queries to services like “wtfismyip.com” and “ipinfo.io”. This activity is significant as it is commonly used by malware, such as Trickbot, for reconnaissance to determine the infected machine’s IP address. If confirmed malicious, this could allow attackers to gather network information, aiding in further attacks or lateral movement within the network.
Detection logic
`sysmon` EventCode=22 QueryName IN ("*wtfismyip.com", "*checkip.*", "*ipecho.net", "*ipinfo.io", "*api.ipify.org", "*icanhazip.com", "*ip.anysrc.com","*api.ip.sb", "ident.me", "www.myexternalip.com", "*zen.spamhaus.org", "*cbl.abuseat.org", "*b.barracudacentral.org", "*dnsbl-1.uceprotect.net", "*spam.dnsbl.sorbs.net", "*iplogger.org*", "*ip-api.com*", "*geoip.*", "*icanhazip.*")
| stats min(_time) as firstTime max(_time) as lastTime count by Image ProcessId QueryName QueryStatus QueryResults EventCode Computer
| rename Computer as dest
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_gather_victim_network_info_through_ip_check_web_services_filter`