Internet Scan

Information obtained (commonly via active network traffic probes or web crawling) regarding various types of resources and servers connected to the public Internet

ID: DS0035
Platform: PRE
Collection Layer: OSINT
Version: 1.0
Created: 20 October 2021
Last Modified: 20 October 2021

Data Components

Internet Scan: Response Content

Logged network traffic in response to a scan showing both protocol header and body values

Internet Scan: Response Content

Logged network traffic in response to a scan showing both protocol header and body values

Domain ID Name Detects
Enterprise T1583 Acquire Infrastructure

Once adversaries have provisioned infrastructure (ex: a server for use in command and control), internet scans may help proactively discover adversary acquired infrastructure. Consider looking for identifiable patterns such as services listening, certificates in use, SSL/TLS negotiation features, or other response artifacts associated with adversary C2 software.[1][2][3] Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.

.003 Virtual Private Server

Once adversaries have provisioned a VPS (ex: for use as a command and control server), internet scans may reveal servers that adversaries have acquired. Consider looking for identifiable patterns such as services listening, certificates in use, SSL/TLS negotiation features, or other response artifacts associated with adversary C2 software.[1][2][3] Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.

.004 Server

Once adversaries have provisioned a server (ex: for use as a command and control server), internet scans may reveal servers that adversaries have acquired. Consider looking for identifiable patterns such as services listening, certificates in use, SSL/TLS negotiation features, or other response artifacts associated with adversary C2 software.[1][2][3]

.006 Web Services

Once adversaries leverage the web service as infrastructure (ex: for command and control), it may be possible to look for unique characteristics associated with adversary software, if known.[1] Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control (Web Service) or Exfiltration Over Web Service.

.007 Serverless

Once adversaries leverage serverless functions as infrastructure (ex: for command and control), it may be possible to look for unique characteristics associated with adversary software, if known.[1] Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle.

Enterprise T1584 Compromise Infrastructure

Once adversaries have provisioned compromised infrastructure (ex: a server for use in command and control), internet scans may help proactively discover compromised infrastructure. Consider looking for identifiable patterns such as services listening, certificates in use, SSL/TLS negotiation features, or other response artifacts associated with adversary C2 software.[1][2][3]

.003 Virtual Private Server

Once adversaries have provisioned software on a compromised VPS (ex: for use as a command and control server), internet scans may reveal VPSs that adversaries have compromised. Consider looking for identifiable patterns such as services listening, certificates in use, SSL/TLS negotiation features, or other response artifacts associated with adversary C2 software.[1][2][3]

.004 Server

Once adversaries have provisioned software on a compromised server (ex: for use as a command and control server), internet scans may reveal servers that adversaries have compromised. Consider looking for identifiable patterns such as services listening, certificates in use, SSL/TLS negotiation features, or other response artifacts associated with adversary C2 software.[1][2][3]

.006 Web Services

Once adversaries leverage the abused web service as infrastructure (ex: for command and control), it may be possible to look for unique characteristics associated with adversary software, if known.[1]Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control Web Service or Exfiltration Over Web Service .

.007 Serverless

Once adversaries leverage serverless functions as infrastructure (ex: for command and control), it may be possible to look for unique characteristics associated with adversary software, if known.[1] Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle.

Enterprise T1587 Develop Capabilities

Consider use of services that may aid in the tracking of capabilities, such as certificates, in use on sites across the Internet. In some cases it may be possible to pivot on known pieces of information to uncover other adversary infrastructure.[4] Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Defense Evasion or Command and Control.

.003 Digital Certificates

Consider use of services that may aid in the tracking of certificates in use on sites across the Internet. In some cases it may be possible to pivot on known pieces of certificate information to uncover other adversary infrastructure.[4]Detection efforts may be focused on related behaviors, such as Web Protocols , Asymmetric Cryptography , and/or Install Root Certificate .

Enterprise T1592 Gather Victim Host Information

Internet scanners may be used to look for patterns associated with malicious content designed to collect host information from visitors.[1][5]Much of this activity may have a very high occurrence and associated false positive rate, as well as potentially taking place outside the visibility of the target organization, making detection difficult for defenders. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Initial Access.

.001 Hardware

Internet scanners may be used to look for patterns associated with malicious content designed to collect host hardware information from visitors.[1][5]Much of this activity may have a very high occurrence and associated false positive rate, as well as potentially taking place outside the visibility of the target organization, making detection difficult for defenders. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Initial Access.

.002 Software

Internet scanners may be used to look for patterns associated with malicious content designed to collect host software information from visitors.[1][5]Much of this activity may have a very high occurrence and associated false positive rate, as well as potentially taking place outside the visibility of the target organization, making detection difficult for defenders. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Initial Access.

.004 Client Configurations

Internet scanners may be used to look for patterns associated with malicious content designed to collect client configuration information from visitors.[1][5]Much of this activity may have a very high occurrence and associated false positive rate, as well as potentially taking place outside the visibility of the target organization, making detection difficult for defenders. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Initial Access.

Enterprise T1588 Obtain Capabilities

Monitor for logged network traffic in response to a scan showing both protocol header and body values that may buy and/or steal capabilities that can be used during targeting. Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Defense Evasion or Command and Control.

.004 Digital Certificates

Monitor for logged network traffic in response to a scan showing both protocol header and body values that may buy and/or steal SSL/TLS certificates that can be used during targeting. Detection efforts may be focused on related behaviors, such as Web Protocols, Asymmetric Cryptography, and/or Install Root Certificate.

Enterprise T1608 Stage Capabilities

If infrastructure or patterns in malware, tooling, certificates, or malicious web content have been previously identified, internet scanning may uncover when an adversary has staged their capabilities.Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as initial access and post-compromise behaviors.

.001 Upload Malware

If infrastructure or patterns in malware have been previously identified, internet scanning may uncover when an adversary has staged malware to make it accessible for targeting.Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on post-compromise phases of the adversary lifecycle, such as User Execution or Ingress Tool Transfer .

.002 Upload Tool

If infrastructure or patterns in tooling have been previously identified, internet scanning may uncover when an adversary has staged tools to make them accessible for targeting.Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on post-compromise phases of the adversary lifecycle, such as Ingress Tool Transfer.

.003 Install Digital Certificate

Consider use of services that may aid in the tracking of certificates in use on sites across the Internet. In some cases it may be possible to pivot on known pieces of certificate information to uncover other adversary infrastructure.[4]Detection efforts may be focused on related behaviors, such as Web Protocols or Asymmetric Cryptography.

.004 Drive-by Target

If infrastructure or patterns in the malicious web content utilized to deliver a Drive-by Compromise have been previously identified, internet scanning may uncover when an adversary has staged web content for use in a strategic web compromise.Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on other phases of the adversary lifecycle, such as Drive-by Compromise or Exploitation for Client Execution.

.005 Link Target

If infrastructure or patterns in malicious web content have been previously identified, internet scanning may uncover when an adversary has staged web content to make it accessible for targeting.Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on other phases of the adversary lifecycle, such as during Spearphishing Link , Spearphishing Link , or Malicious Link .

.006 SEO Poisoning

If infrastructure or patterns in the malicious web content related to SEO poisoning or Drive-by Target have been previously identified, internet scanning may uncover when an adversary has staged web content supporting a strategic web compromise. Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on other phases of the adversary lifecycle, such as Drive-by Compromise or Exploitation for Client Execution.

Internet Scan: Response Metadata

Contextual data about an Internet-facing resource gathered from a scan, such as running services or ports

Internet Scan: Response Metadata

Contextual data about an Internet-facing resource gathered from a scan, such as running services or ports

Domain ID Name Detects
Enterprise T1583 Acquire Infrastructure

Monitor for contextual data about an Internet-facing resource gathered from a scan, such as running services or ports that may buy, lease, or rent infrastructure that can be used during targeting. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.

.003 Virtual Private Server

Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.

.004 Server

Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.

Enterprise T1584 Compromise Infrastructure

Monitor for contextual data about an Internet-facing resource gathered from a scan, such as running services or ports that may compromise third-party infrastructure that can be used during targeting. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.

.003 Virtual Private Server

Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.

.004 Server

Much of this activity will take place outside the visibility of the target organization, making detection of this behavior difficult. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Command and Control.

References