Detect Obtain Capabilities in Google Chronicle
This detection identifies adversary capability acquisition activity manifesting within the victim environment — specifically, the arrival, staging, and first execution of known offensive tools, exploit frameworks, and dual-use security utilities. While T1588 is a PRE-ATT&CK technique occurring outside the victim network, its downstream effects are observable: offensive tools landing in atypical directories (Temp, Downloads, user profile paths), processes executing with names or command-line arguments matching known offensive frameworks (Cobalt Strike, Mimikatz, Rubeus, Sliver, Havoc, Impacket), downloads via living-off-the-land binaries (certutil, bitsadmin, curl), and network connections to known exploit distribution infrastructure. The detection correlates process creation events, file download artifacts, and network telemetry to surface high-risk capability introductions across Windows and Linux endpoints.
MITRE ATT&CK
- Tactic
- Resource Development
- Technique
- T1588 Obtain Capabilities
- Canonical reference
- https://attack.mitre.org/techniques/T1588/
YARA-L Detection Query
rule T1588_offensive_tool {
meta:
author = "Detection Engineering"
description = "Detects execution of known offensive security tools"
severity = "high"
confidence = "medium"
mitre_attack = "T1588"
reference = "https://attack.mitre.org/techniques/T1588/"
events:
$e.metadata.event_type = "PROCESS_LAUNCH"
(
re.regex($e.target.process.file.full_path, `(?i)(mimikatz|rubeus|bloodhound|sharphound|cobalt|meterpreter|crackmapexec|impacket)`) or
re.regex($e.target.process.command_line, `(?i)(invoke-mimikatz|invoke-bloodhound|\-enc\s|\-encoded\s|bypass)`)
)
condition:
$e
}Google Chronicle YARA-L 2.0 detection for Obtain Capabilities. Detects potential capability acquisition activity across three branches: (1) execution of processes matching known offensive tool names or command-line patterns, (2) living-off-the-land binaries (cert
Data Sources
Required Tables
False Positives & Tuning
- Authorized penetration testing engagements using commercial offensive tools
- Internal red team exercises with pre-approved scope and tooling
- Security researchers analyzing offensive capabilities in isolated lab environments
- IT administrators using dual-use network tools for authorized diagnostics
Other platforms for T1588
Testing Methodology
Validate this detection against 4 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1LOLBin Capability Download via CertUtil
Expected signal: Sysmon EventCode=1 with Image=certutil.exe, CommandLine containing '-urlcache' and '-split'; Sysmon EventCode=11 (FileCreate) for the downloaded file in %TEMP%; possible DNS query in EventCode=22 for the target hostname
- Test 2PowerShell Download Cradle to Staging Path
Expected signal: Sysmon EventCode=1 with Image=powershell.exe and CommandLine containing 'DownloadFile' and 'WebClient'; Sysmon EventCode=3 (NetworkConnect) to target IP; Sysmon EventCode=11 (FileCreate) in %TEMP%
- Test 3Offensive Tool Naming Pattern Execution from Temp
Expected signal: Sysmon EventCode=1 with Image path containing %TEMP%\mimikatz_test.exe; parent process is cmd.exe; CommandLine includes /all argument; Sysmon EventCode=11 for file copy to staging path
- Test 4BITS Transfer Capability Staging
Expected signal: Sysmon EventCode=1 with Image=bitsadmin.exe and CommandLine containing '/transfer' and target URL; Sysmon EventCode=11 for file creation in %TEMP%; Windows Event 16403 in Microsoft-Windows-Bits-Client/Operational log recording the completed transfer job
References (6)
- https://attack.mitre.org/techniques/T1588/
- https://www.citizenlab.ca/2021/07/nso-group-pegasus-spyware-2021/
- https://krebsonsecurity.com/2011/09/comodo-hacker-i-hacked-diginotar-too/
- https://www.recordedfuture.com/blog/nation-state-intelligence-buying-commercial-malware
- https://thedfirreport.com/2021/08/29/cobalt-strike-a-defenders-guide/
- https://github.com/redcanaryco/atomic-red-team/tree/master/atomics/T1588
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