Below is a simulated interpreting this artifact. Security Analysis of an Anomalous FTP Artifact: 10.16 1oo 244 ftp server Document ID: FOR-2024-10.16 TLP: Clear 1. Abstract This paper analyzes a cryptic network log entry: 10.16 1oo 244 ftp server . We deconstruct the string into plausible components: an IP prefix ( 10.16 ), a numeric sequence ( 1oo 244 containing an octal-like 1oo ), and a service declaration ( ftp server ). We conclude this likely represents a corrupted or intentionally obfuscated banner from a misconfigured FTP server on a private network, with the 1oo suggesting octal interpretation of port or status codes. 2. Deconstruction & Interpretation | Token | Raw Value | Possible Meaning | |-------|-----------|------------------| | 10.16 | IP prefix | Class A private IPv4 address block (10.0.0.0/8). Suggests internal network. Complete IP likely 10.16.x.x . | | 1oo | Alphanumeric | Not standard decimal. Resembles 100 but with letters oo . Could be octal 100 (decimal 64) or leetspeak ( loo = 100?). | | 244 | Decimal | Common FTP port? No. Alternative: HTTP status 244 (unknown), or part of IP: 10.16.1.244 ? | | ftp server | Service | Explicit declaration. Likely from 220 welcome banner or login prompt. |
| Observation | Implication | |-------------|--------------| | Log contains 10.16 (internal IP) | Likely from internal IDS/IPS, host firewall, or compromised machine beaconing. | | 1oo instead of 100 | Possible shell output where ASCII 0 replaced by letter o (binary-to-text artifact). | | ftp server explicitly stated | Unusual – typically only 220 banner or PORT command. Could be from service line in /etc/services or a honeypot label. | 10.16 1oo 244 ftp server
Locate the host, inspect FTP configuration, verify legitimate need for plaintext FTP, and consider migrating to SFTP/FTPS. Appendix: ASCII conversion of 1oo – 1 (0x31), o (0x6F), o (0x6F). Could be shell output misinterpreted as string. Below is a simulated interpreting this artifact
Search for surrounding entries. Look for USER anonymous , PASS , RETR to determine exploitation. 10.16 1oo 244 ftp server is most consistent with an FTP server running on private IP 10.16.1.100 at port 244 , where 1oo is a corrupted rendering of 100 (due to octal, font, or encoding error). No standard FTP reply code is 244, and 1oo has no valid FTP meaning. We deconstruct the string into plausible components: an
"timestamp": "2024-10-16T??:??:??Z", "src_ip": "10.16.??.??", "dest_port": 244, "protocol": "TCP", "app_proto": "ftp", "banner": "1oo 244 ftp server"
This is a curated technical analysis based on your query. The string "10.16 1oo 244 ftp server" appears to be a fragment of network reconnaissance data, likely from a penetration test, CTF challenge, or log entry.
ftp 10.16.x.x 244 If 244 is a – there is no standard FTP reply 244. FTP reply codes are 3-digit (x,y,z groups). 244 is invalid. So it’s likely a port or IP octet. 4. Security Implications Running FTP (plaintext protocol) on a non-standard port is a common obscurity tactic , not security. Attackers scan all 65535 ports.