POST /dav/addressbook?add.vcf: Trying to exploit CardDAV servers to store and spread malware.

It made multiple requests with the same If-None-Match header.

Ping of Death: Logs showing oversized ICMP requests could suggest Ping of Death attacks.

This malicious IP was reported for attempting a Sniffing attack, capturing and analyzing FTP traffic to glean sensitive information.

The IP showed unusual patterns in referrer URLs.

The IP attempted to send emails from the Postfix server pretending to be from a different sender.

Shell Injection: Logs show requests containing command line shell syntax, suggesting shell command injection.

The IP was found trying to maliciously clone the SSH certificates for privileged access.

Multiple requests with the same TE (Transfer Encoding) header.

The IP was involved in a FTP Fuzzing attack, sending random or malformed data to the FTP server to cause a crash or reveal vulnerabilities.

A high number of unsuccessful SSH logins, a common target for brute force attacks.

This IP belongs to Tumblr.

It attempted to perform a brute force attack on the POP3 server.

This IP attempted to distribute malicious Javascript files.

The IP address has been associated with unwanted browser toolbar installations.

Multiple failed login attempts from the same IP address in a short span of time.

It attempted to perform SQL injection attacks through the Apache server.

It made multiple requests with the same Referer header.

This IP belongs to United Parcel Service.

The IP address attempted to register as a SIP user with an invalid username.

Our system flagged this IP as conducting fraudulent transactions activities.

The IP tried to manipulate DNS lookup processes to divert traffic to a malicious destination.

It attempted to perform Local File Inclusion (LFI) attacks on the Apache server.

It tried to execute dictionary attacks on our Mail service causing potential delays.

Unusual TCP/IP Headers: Logs reflect HTTP requests with unusual or altered TCP/IP headers, an attempt to confuse or slip through security measures.