Network And Perimeter Exploitation

An attacker is scanning a network and needs to determine which operating system is running on a target host by analyzing its TCP/IP stack response behaviors. What feature does Nmap provide for this?

A penetration tester is analyzing a network where ICMP echo requests are blocked by perimeter firewalls, making traditional host discovery fail. Which Nmap host discovery option should be used to discover live hosts using TCP ACK packets sent to port 80?

An elite penetration tester needs to bypass a strict perimeter stateful inspection firewall that drops fragmented packets and inspects TCP payload flags. They decide to use Nmap to send packets with the FIN, PSH, and URG flags set simultaneously (a Xmas scan). Which Nmap flag implements this?

A penetration tester needs to perform a stealthy TCP SYN scan against a target network using Nmap to avoid triggering simple stateless packet filters. Which command-line flag should be used?

During an assessment, a penetration tester captures an LLMNR/NBT-NS broadcast request on the local network segment. Which tool can the tester use to spoof the response and capture the resulting NTLMv2 password hash when the victim machine attempts authentication?

An attacker has gained command execution on an internal machine and wants to bypass egress filtering that blocks all outbound TCP and UDP ports except port 53. Which tool can be used to tunnel arbitrary TCP traffic encapsulated inside DNS queries out of the network?

A security analyst is auditing an internal network and wishes to identify all active DNS servers that allow unauthorized zone transfers (AXFR). Which tool is specifically designed to test for DNS zone transfer vulnerabilities?

A penetration tester has compromised an internal Windows workstation and wants to extract saved credentials from the Local Security Authority Subsystem Service (LSASS) memory. Which utility from the Sysinternals suite, frequently abused by red teams, can be used to safely dump the lsass.exe process memory?

During an internal penetration test, you need to identify active Windows hosts on a local subnet without generating noisy TCP or UDP port scan traffic. Which tool and command natively uses ARP requests to quickly map live systems on the local Ethernet segment?

An attacker has established a foothold inside a corporate network and needs to scan an internal subnet without generating noisy network connections that trigger host-based IDS alerts. They decide to use an idle scan. Which Nmap argument implements an idle scan via a zombie host?

A penetration tester is performing a network assessment against a target running an advanced Intrusion Prevention System (IPS). To evade signature-based detection that looks for standard Nmap probe payloads, which Nmap option allows the user to append random junk data to generated packets?

A penetration tester is performing service enumeration on a target FTP server. To quickly grab the banner and check what FTP software version is running without initiating an interactive login session, which tool is most appropriate?

An elite penetration tester needs to pivot through a compromised Linux host using SSH local port forwarding (-L) to access a database server running on an internal port behind a firewall. Which correct syntax establishes a local port forward routing port 3306 on the attacker's machine to the internal database server IP 10.0.0.50 on port 3306 via the pivot host?

A penetration tester is conducting a network penetration test and discovers an open SNMP service (UDP port 161) using a default community string. Which tool can be used to enumerate user accounts, routing tables, and running processes via SNMP?

An external penetration tester is conducting reconnaissance against a corporate network and needs to discover valid email addresses and associated infrastructure hosted publicly. Which tool uses search engines and public databases to gather open-source intelligence on target domains?

A penetration tester is analyzing network traffic and notices an attacker is leveraging IPv6 neighbor discovery protocol (NDP) spoofing to intercept local traffic. Which mitigation feature implemented on enterprise switches prevents malicious rogue advertisements on local networks?

During an internal network scan, a pentester identifies an open port 445 on a Windows machine and wants to check if it is vulnerable to MS17-010 (EternalBlue) without crashing the service. Which Nmap Scripting Engine (NSE) script should be executed?

During a network audit, a tester discovers that a router is running an insecure routing protocol implementation susceptible to routing table poisoning. Which protocol relies on cleartext updates and hop-count metrics up to 16, making it vulnerable to unauthorized route injection?

An attacker wants to bypass egress filtering on a restricted network by encapsulating TCP packets inside ICMP echo request payloads. Which open-source tunneling utility is designed specifically for this purpose?

During an internal network assessment, you need to identify NetBIOS information such as registered computer names and logged-in usernames on legacy Windows hosts. Which tool performs a NetBIOS name query scan across an IP range?

A penetration tester is scanning a web server and wants to rapidly locate hidden administrative directories and backup files using a wordlist. Which command-line tool is designed specifically for directory brute-forcing?

A penetration tester has gained access to a Linux host and discovers that port forwarding using SSH is restricted, but outbound HTTPS (port 443) traffic is allowed. Which tool creates encrypted TCP tunnels over HTTP or HTTPS and is ideal for egress bypassing?

A penetration tester is auditing an organization's wireless network and discovers an enterprise WPA2-Enterprise deployment utilizing PEAP-MSCHAPv2. Which tool can be used to set up a rogue RADIUS authentication server to capture enterprise user credentials when clients mistakenly associate?

An attacker has intercepted ARP traffic on a switched local network and wants to maintain a man-in-the-middle position without causing high volumes of repetitive ARP reply frames that might trigger security alerts. Which tool allows selective, low-frequency ARP poisoning?

An external penetration tester wants to test if a target organization's mail server is susceptible to email harvesting by issuing standard SMTP VRFY and EXPN commands. Which tool performs this type of mail server enumeration?

A penetration tester is performing network reconnaissance against a hardened target and needs to discover live hosts while avoiding ping probes. Which Nmap option tells Nmap not to perform host discovery before scanning ports, ensuring every target IP is fully port-scanned?

A pentester needs to verify whether a remote server is listening on a specific UDP port, say port 123 (NTP). They send a UDP packet, but the target responds with an ICMP Port Unreachable message. What does this response indicate about the port?

During an internal network security assessment, a tester discovers that a legacy application communicates over a custom TCP port with unencrypted traffic. To capture and analyze this traffic without disrupting communications, which passive technique on a managed switch should be configured by the network administrator?

An attacker has gained access to an internal machine and wants to determine whether network traffic can be redirected using source routing options in IPv4 packets. Which tool allows crafting custom IPv4 packets with source routing options enabled?

A penetration tester is evaluating an internal network and needs to identify live Windows hosts that have Server Message Block (SMB) services running. Which TWO Nmap Scripting Engine (NSE) scripts can be used to gather SMB version and OS details safely? (Choose TWO)

During network enumeration of a Windows domain, a penetration tester discovers multiple legacy services running. Which TWO protocols or services, if enabled, frequently expose sensitive domain or system information without requiring authentication? (Choose TWO)

A penetration tester has compromised an internal machine and needs to pivot deeper into the network. Which TWO tools or features can be utilized to set up a SOCKS proxy for tunneling arbitrary TCP traffic through the compromised host? (Choose TWO)

An elite penetration tester is attempting to evade network intrusion detection systems (IDS) during a port scan. Which THREE techniques can be applied via Nmap command-line options to obscure the scan origin or payload? (Choose THREE)

A penetration tester is analyzing network traffic associated with lateral movement and needs to identify potential Kerberoasting activity in Active Directory. Which THREE indicators or artifacts are typically associated with this attack? (Choose THREE)

A penetration tester is conducting reconnaissance against a web application firewall (WAF) protected perimeter. Which TWO methods can help identify whether a WAF is present in front of a web server? (Choose TWO)

An internal penetration tester needs to scan a local subnet for live hosts quickly and quietly without sending TCP or UDP port traffic. Which TWO methods rely on network layer protocols other than TCP port scanning for host discovery? (Choose TWO)

An attacker has gained access to a compromised host and wants to establish persistence and covert command-and-control (C2) communication through corporate firewalls. Which THREE protocols or channels are commonly leveraged for outbound covert tunneling because they are rarely blocked by egress filters? (Choose THREE)

A penetration tester needs to enumerate available shares and permissions on a remote Windows file server during an internal audit. Which TWO tools or commands can be used to query SMB shares? (Choose TWO)

An elite penetration tester is conducting network reconnaissance behind a restrictive stateful firewall that drops anomalous TCP flag combinations. Which THREE Nmap scan types are most likely to fail or receive unreliable results because they rely on non-standard TCP flag combinations? (Choose THREE)

A penetration tester is evaluating network security controls and wants to check for insecure or plaintext authentication protocols in use across the network. Which TWO protocols transmit credentials or session tokens in cleartext and can be easily sniffed? (Choose TWO)

During an internal network penetration test, a tester identifies an active DHCP server on the local network. Which TWO attacks can be launched against the DHCP infrastructure to disrupt service or intercept traffic? (Choose TWO)

During an internal penetration test, you successfully compromise a Linux host with two network interfaces: eth0 (10.10.10.50) connected to the initial segment, and eth1 (192.168.100.10) connected to an isolated internal subnet. To route subsequent Nmap TCP SYN scans through this compromised host into the 192.168.100.0/24 network using Metasploit, which post-exploitation module must you configure and run first?

You are auditing a perimeter network protected by an Intrusion Detection System (IDS). To bypass signature-based detection mechanisms that look for standard Nmap packet patterns, you decide to fragment outgoing TCP packets into tiny 8-byte blocks. Which Nmap argument accomplishes this packet fragmentation?

An external penetration tester is performing reconnaissance against a corporate network and needs to identify live hosts while minimizing direct connection alerts on traditional port scanners. Which Nmap command-line argument should be used to execute an ICMP Echo Request ping sweep without performing port scanning on the discovered live hosts?

You are attempting to evade a stateful packet inspection (SPI) firewall that drops TCP packets with invalid TCP flag combinations. You decide to use Nmap to perform a stealth scan against a target web server behind this perimeter. Which Nmap scan type explicitly sends a packet with the FIN, PSH, and URG flags set, relying on RFC 793 behavior where closed ports reply with an RST and open ports ignore the packet?

An attacker has successfully established a man-in-the-middle position on a local network segment using ARP spoofing. To ensure they capture sensitive authentication traffic, which THREE tools or utilities can capture and parse credentials passing across the wire? (Choose THREE)

During an assessment of an enterprise network, you discover an insecure Server Message Block (SMB) configuration. You want to enumerate network shares and user accounts using enum4linux without triggering account lockout policies through brute-force methods. Which underlying protocol implementation does enum4linux primarily leverage to query Windows and Samba hosts for granular domain information?

You are performing a penetration test against a network segment where direct outbound TCP connections are blocked by a strict firewall, but outbound DNS queries over UDP port 53 to an external DNS server are permitted. To tunnel traffic out of this restricted environment, which tool allows you to encapsulate arbitrary TCP traffic within DNS queries?

You have gained access to a Linux jump box and need to set up a local port forward using SSH to access an internal web application running on port 80 of a restricted server (10.0.0.5) that is only accessible from the jump box. Which SSH client flag combination establishes a local port forwarding tunnel listening on port 8080 of your attacking machine?

You are hardening and analyzing network perimeter defenses against advanced evasion techniques. Which TWO of the following Nmap features or scan modifications are specifically designed to evade packet inspection filters by altering packet headers or timing parameters?

During an internal engagement, a penetration tester gains access to a Linux host that has multiple network interfaces. The tester needs to determine which interface can route to the 10.10.10.0/24 subnet and what the next-hop gateway is. Which command provides this information most directly?

You are conducting an external penetration test against a company that uses a Cisco ASA firewall. You have identified that the firewall is running an older firmware version. Which technique would best allow you to bypass the firewall's access control lists to reach an internal web server on port 80?

You are conducting an internal network penetration test and have obtained credentials for a domain user. You want to identify which hosts on the internal network permit SMB signing to be disabled so that relay attacks become feasible. Which TWO actions should you take to build this target list? (Choose two.)

You have compromised a dual-homed Linux host that sits between a DMZ and an internal network. From this host you need to reach internal web servers on TCP/8080 that are not routable from your attack machine, and you want to route all your tooling traffic through the pivot using SOCKS. Which approach correctly establishes the pivot?

A client asks you to verify that their perimeter router does not leak internal topology information to the internet. You want to send crafted probe packets with varying TTL values and observe the ICMP responses to map the path and infer router interfaces. Which technique should you use?

During an external engagement, you find that the target's edge device responds to IKE on UDP/500 and appears to accept aggressive-mode Phase 1 proposals. You want to determine whether a pre-shared key can be recovered offline so you can impersonate a peer. Which approach is most appropriate?

During an internal penetration test, you compromise a Windows host that sits on a management VLAN. The network is segmented, and the host has two interfaces: one on the management VLAN (10.10.10.0/24) and one on the corporate VLAN (192.168.1.0/24). You want to reach a database server at 172.16.5.20 on a third VLAN, but your compromised host has no route to that subnet. You have administrative privileges on the compromised host. Which of the following is the most reliable technique to pivot to the 172.16.5.0/24 network?

During a perimeter penetration test, you need to identify live hosts on a target network without performing a full port scan. You have no prior knowledge of the network and want to minimize the chance of triggering intrusion detection systems. Which Nmap command is best suited for this task?

You are conducting an external penetration test against a company's web server. You discover that the server is vulnerable to a buffer overflow in a custom CGI script. You want to exploit it to gain a reverse shell. Which Metasploit payload should you use to establish a Meterpreter session?