Command Line
fscan.exe -h 10.227.156.0/24 -nopoc -np -p 80,135,139,443,445,1433,3306,5432,6379,7001,8000,8080,3389
Description
fscan is a Vulnerability Scanner, typically renamed in deployment - look for '-nopoc' or '-np' arguments in commandline.
Risk
High
Risk Reason
Observation of 'fscan.exe' or arguments such as '-nopoc' in an unusual commandline are suspicious indicators.
Fidelity
High
Fidelity Reason
This type of behavior is typically rare in most organizations.
Operating Systems
Killchain Phases
References
MITRE ATT&CK TECHNIQUES
URL: https://attack.mitre.org/techniques/T1018
Description: Adversaries may attempt to get a listing of other systems by IP address, hostname, or other logical identifier on a network that may be used for Lateral Movement from the current system. Functionality could exist within remote access tools to enable this, but utilities available on the operating system could also be used such as [Ping](https://attack.mitre.org/software/S0097) or net view using [Net](https://attack.mitre.org/software/S0039).
Adversaries may also analyze data from local host files (ex: C:\Windows\System32\Drivers\etc\hosts or /etc/hosts) or other passive means (such as local [Arp](https://attack.mitre.org/software/S0099) cache entries) in order to discover the presence of remote systems in an environment.
Adversaries may also target discovery of network infrastructure as well as leverage [Network Device CLI](https://attack.mitre.org/techniques/T1059/008) commands on network devices to gather detailed information about systems within a network.(Citation: US-CERT-TA18-106A)(Citation: CISA AR21-126A FIVEHANDS May 2021)
Tactics:
URL: https://attack.mitre.org/techniques/T1595/002
Description: Adversaries may scan victims for vulnerabilities that can be used during targeting. Vulnerability scans typically check if the configuration of a target host/application (ex: software and version) potentially aligns with the target of a specific exploit the adversary may seek to use.
These scans may also include more broad attempts to [Gather Victim Host Information](https://attack.mitre.org/techniques/T1592) that can be used to identify more commonly known, exploitable vulnerabilities. Vulnerability scans typically harvest running software and version numbers via server banners, listening ports, or other network artifacts.(Citation: OWASP Vuln Scanning) Information from these scans may reveal opportunities for other forms of reconnaissance (ex: [Search Open Websites/Domains](https://attack.mitre.org/techniques/T1593) or [Search Open Technical Databases](https://attack.mitre.org/techniques/T1596)), establishing operational resources (ex: [Develop Capabilities](https://attack.mitre.org/techniques/T1587) or [Obtain Capabilities](https://attack.mitre.org/techniques/T1588)), and/or initial access (ex: [Exploit Public-Facing Application](https://attack.mitre.org/techniques/T1190)).
Tactics: