Detect Archive Collected Data in IBM QRadar
Adversaries may compress and/or encrypt data that is collected prior to exfiltration. Compressing the data can help to obfuscate collected data and minimize the amount of data sent over the network. Encryption can be used to hide information that is being exfiltrated from detection or make exfiltration less conspicuous upon inspection by a defender. Both compression and encryption are done prior to exfiltration and can be performed using a utility, third-party library, or custom method. Common tools include 7-Zip, WinRAR, the Windows built-in compact and certutil utilities, PowerShell Compress-Archive and .NET IO.Compression classes, and tar/gzip/openssl on Linux and macOS. Threat actors including Dragonfly, Lazarus Group, Ember Bear, BlackByte, and Axiom have all used archiving and encryption as a pre-exfiltration staging step. Sub-techniques cover archive via utility (T1560.001), archive via library (T1560.002), and archive via custom method (T1560.003).
MITRE ATT&CK
- Tactic
- Collection
- Technique
- T1560 Archive Collected Data
- Canonical reference
- https://attack.mitre.org/techniques/T1560/
QRadar Detection Query
SELECT
DATEFORMAT(devicetime, 'yyyy-MM-dd HH:mm:ss') AS event_time,
LOGSOURCENAME(logsourceid) AS log_source,
username,
"Process Name" AS process_name,
"Process Command Line" AS command_line,
"Parent Process Name" AS parent_process,
CASE
WHEN LOWER("Process Name") LIKE ANY ('%\\7z.exe', '%\\7za.exe', '%\\7zr.exe', '%\\rar.exe', '%\\winrar.exe')
AND (LOWER("Process Command Line") LIKE '% -hp%'
OR LOWER("Process Command Line") LIKE '%-pass%'
OR LOWER("Process Command Line") LIKE '%-password%')
THEN 'Password-Protected Archive'
WHEN LOWER("Process Name") LIKE ANY ('%\\7z.exe', '%\\7za.exe', '%\\7zr.exe', '%\\rar.exe', '%\\winrar.exe')
AND LOWER("Parent Process Name") LIKE ANY ('%\\winword.exe', '%\\excel.exe', '%\\outlook.exe',
'%\\powerpnt.exe', '%\\mshta.exe', '%\\wscript.exe', '%\\cscript.exe',
'%\\mmc.exe', '%\\regsvr32.exe', '%\\rundll32.exe')
THEN 'Archive via Suspicious Parent'
WHEN LOWER("Process Name") LIKE ANY ('%\\powershell.exe', '%\\pwsh.exe')
AND (LOWER("Process Command Line") LIKE '%compress-archive%'
OR LOWER("Process Command Line") LIKE '%io.compression%'
OR LOWER("Process Command Line") LIKE '%gzipstream%'
OR LOWER("Process Command Line") LIKE '%deflatestream%'
OR LOWER("Process Command Line") LIKE '%ziparchive%')
THEN 'PowerShell .NET Compression'
WHEN LOWER("Process Name") LIKE '%\\certutil.exe'
AND (LOWER("Process Command Line") LIKE '%-encode%'
OR LOWER("Process Command Line") LIKE '%-encodehex%')
THEN 'CertUtil Encoding'
ELSE 'Suspicious Archive Activity'
END AS detection_type
FROM events
WHERE
devicetime > NOW() - 86400000
AND (
(
LOWER("Process Name") LIKE ANY ('%\\7z.exe', '%\\7za.exe', '%\\7zr.exe', '%\\rar.exe', '%\\winrar.exe')
AND (
LOWER("Process Command Line") LIKE '% -hp%'
OR LOWER("Process Command Line") LIKE '%-pass%'
OR LOWER("Process Command Line") LIKE '%-password%'
OR LOWER("Parent Process Name") LIKE ANY (
'%\\winword.exe', '%\\excel.exe', '%\\outlook.exe', '%\\powerpnt.exe',
'%\\mshta.exe', '%\\wscript.exe', '%\\cscript.exe',
'%\\mmc.exe', '%\\regsvr32.exe', '%\\rundll32.exe'
)
)
)
OR (
LOWER("Process Name") LIKE ANY ('%\\powershell.exe', '%\\pwsh.exe')
AND (
LOWER("Process Command Line") LIKE '%compress-archive%'
OR LOWER("Process Command Line") LIKE '%io.compression%'
OR LOWER("Process Command Line") LIKE '%gzipstream%'
OR LOWER("Process Command Line") LIKE '%deflatestream%'
OR LOWER("Process Command Line") LIKE '%ziparchive%'
)
)
OR (
LOWER("Process Name") LIKE '%\\certutil.exe'
AND (
LOWER("Process Command Line") LIKE '%-encode%'
OR LOWER("Process Command Line") LIKE '%-encodehex%'
)
)
)
ORDER BY devicetime DESC IBM QRadar AQL detection for T1560 Archive Collected Data. Queries normalized process creation events (sourced from Sysmon EventCode 1 or Windows Security 4688 log sources with command-line auditing enabled) for four indicator patterns: password-protected archive creation, archive tools spawned by Office or scripting engine parents, PowerShell .NET compression class usage, and CertUtil base64 encoding. Produces a labeled detection_type column for triage prioritization.
Data Sources
Required Tables
False Positives & Tuning
- Automated patch management systems (WSUS, ManageEngine, Ivanti) that use PowerShell Compress-Archive to bundle patches before deployment — verify against known patching service accounts and scheduled maintenance windows
- Enterprise DLP or CASB tooling that invokes CertUtil to encode files during content inspection workflows — cross-reference log source IP against known DLP infrastructure
- Password-protected archive creation by end users for legitimate file sharing via email or file transfer portals — high volume on specific hosts during business hours with consistent users suggests non-malicious activity
Other platforms for T1560
Testing Methodology
Validate this detection against 5 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 17-Zip Password-Protected Archive of Sensitive Directory
Expected signal: Sysmon Event ID 1: Process Create with Image ending in 7z.exe, CommandLine containing '-hp' and 'staged_exfil.zip'. Sysmon Event ID 11: File Create event for C:\Windows\Temp\staged_exfil.zip with InitiatingProcessFileName=7z.exe. Security Event ID 4688 (if process command line auditing enabled) with same details.
- Test 2PowerShell Compress-Archive Staging in Temp Directory
Expected signal: Sysmon Event ID 1: Process Create with Image=powershell.exe, CommandLine containing 'Compress-Archive' and 'C:\Windows\Temp\recent_files_staged.zip'. Sysmon Event ID 11: File Create for the zip archive. PowerShell ScriptBlock Log Event ID 4104 in Microsoft-Windows-PowerShell/Operational with full cmdlet and path.
- Test 3certutil Base64 Encode Binary File
Expected signal: Sysmon Event ID 1: Process Create with Image=certutil.exe, CommandLine containing '-encode' and 'encoded_payload.txt'. Sysmon Event ID 11: File Create for C:\Windows\Temp\encoded_payload.txt. Security Event ID 4688 with the same certutil command line if process auditing is enabled.
- Test 4Linux tar + gzip Collection and Staging
Expected signal: Auditd execve record: type=EXECVE with argv containing 'tar' 'czf' '/tmp/sys_backup_...' '/etc/passwd' '/etc/shadow'. Syslog process creation record (if auditd not deployed). File creation event for /tmp/sys_backup_*.tar.gz. If using a SIEM with Linux file integrity monitoring, alert on new file creation in /tmp matching *.tar.gz by root or privileged account.
- Test 5WinRAR Archive with Password and Locked Headers
Expected signal: Sysmon Event ID 1: Process Create with Image ending rar.exe, CommandLine containing '-hp' and 'staging.rar'. Sysmon Event ID 11: File Create for C:\ProgramData\Microsoft\staging.rar with InitiatingProcessFileName=rar.exe. Security Event ID 4688 with full command line.
References (13)
- https://attack.mitre.org/techniques/T1560/
- https://attack.mitre.org/techniques/T1560/001/
- https://attack.mitre.org/techniques/T1560/002/
- https://attack.mitre.org/techniques/T1560/003/
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1560/T1560.md
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1560.001/T1560.001.md
- https://cdn.cnn.com/cnn/2018/images/07/13/gru.indictment.pdf
- https://learn.microsoft.com/en-us/defender-endpoint/advanced-hunting-deviceprocessevents-table
- https://learn.microsoft.com/en-us/defender-endpoint/advanced-hunting-devicefileevents-table
- https://www.cisa.gov/sites/default/files/publications/AA18-074A_MAR-10135536-G.PDF
- https://securelist.com/toddycat-check-logs/110696/
- https://www.cybereason.com/blog/threat-analysis-report-bumblebee-loader-the-high-road-to-enterprise-domain-control
- https://github.com/SigmaHQ/sigma/tree/master/rules/windows/process_creation
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