"description":"Or 'Unsolicited Bulk Email', this means that the recipient has not granted verifiable permission for the message to be sent and that the message is sent as part of a larger collection of messages, all having a functionally comparable content. This IOC refers to resources, which make up a SPAM infrastructure, be it a harvesters like address verification, URLs in spam e-mails etc.",
"description":"System infected with malware, e.g. PC, smartphone or server infected with a rootkit. Most often this refers to a connection to a sinkholed C2 server",
"description":"Attacks that send requests to a system to discover weaknesses. This also includes testing processes to gather information on hosts, services and accounts. Examples: fingerd, DNS querying, ICMP, SMTP (EXPN, RCPT, ...), port scanning.",
"description":"An attempt to compromise a system or to disrupt any service by exploiting vulnerabilities with a standardised identifier such as CVE name (e.g. buffer overflow, backdoor, cross site scripting, etc.)",
"expanded":"Exploitation of known Vulnerabilities",
"description":"Multiple login attempts (Guessing / cracking of passwords, brute force). This IOC refers to a resource, which has been observed to perform brute-force attacks over a given application protocol.",
"description":"Denial of Service attack, e.g. sending specially crafted requests to a web application which causes the application to crash or slow down.",
"description":"Unauthorised access to information, e.g. by abusing stolen login credentials for a system or application, intercepting traffic or gaining access to physical documents.",
"description":"Unauthorised modification of information, e.g. by an attacker abusing stolen login credentials for a system or application or a ransomware encrypting data. Also includes defacements.",
"description":"Using resources for unauthorised purposes including profit-making ventures, e.g. the use of e-mail to participate in illegal profit chain letters or pyramid schemes.",
"description":"Masquerading as another entity in order to persuade the user to reveal private credentials. This IOC most often refers to a URL, which is used to phish user credentials.",
"description":"Publicly accessible services offering weak crypto, e.g. web servers susceptible to POODLE/FREAK attacks.",
"expanded":"Weak crypto",
"value":"weak-crypto"
},
{
"description":"Publicly accessible services that can be abused for conducting DDoS reflection/amplification attacks, e.g. DNS open-resolvers or NTP servers with monlist enabled.",
"expanded":"DDoS amplifier",
"value":"ddos-amplifier"
},
{
"description":"Potentially unwanted publicly accessible services, e.g. Telnet, RDP or VNC.",
"description":"A system which is vulnerable to certain attacks. Example: misconfigured client proxy settings (example: WPAD), outdated operating system version, XSS vulnerabilities, etc.",
"description":"Software that is intentionally included or inserted in a system for a harmful purpose. A user interaction is normally necessary to activate the code.",
"description":"A successful compromise of a system or application (service). This can have been caused remotely by a known or new vulnerability, but also by an unauthorised local access. Also includes being part of a botnet.",
"description":"By this kind of an attack a system is bombarded with so many packets that the operations are delayed or the system crashes. DoS examples are ICMP and SYN floods, Teardrop attacks and mail-bombing. DDoS often is based on DoS attacks originating from botnets, but also other scenarios exist like DNS Amplification attacks. However, the availability also can be affected by local actions (destruction, disruption of power supply, etc.) – or by Act of God, spontaneous failures or human error, without malice or gross neglect being involved.",
"expanded":"Availability",
"value":"availability"
},
{
"description":"Besides a local abuse of data and systems the information security can be endangered by a successful account or application compromise. Furthermore attacks are possible that intercept and access information during transmission (wiretapping, spoofing or hijacking). Human/configuration/software error can also be the cause.",
"expanded":"Information Content Security",
"value":"information-content-security"
},
{
"description":"Fraud.",
"expanded":"Fraud",
"value":"fraud"
},
{
"description":"Open resolvers, world readable printers, vulnerability apparent from Nessus etc scans, virus signatures not up-to-date, etc",
"expanded":"Vulnerable",
"value":"vulnerable"
},
{
"description":"All incidents which don't fit in one of the given categories should be put into this class. If the number of incidents in this category increases, it is an indicator that the classification scheme must be revised",