Query: rule covering Detects the creation of an ADS (Alternate Data Stream) that contains an executable by looking at a non-empty Imphash
Matching passage: Sigma rule: Detects the creation of an ADS (Alternate Data Stream) that contains an executable by looking at a non-empty Imphash. Logsource: windows / create_stream_hash. Rule: title: Hidden Executable In NTFS Alternate Data Stream id: b69888d4-380c-45ce-9cf9-d9ce46e67821 status: test description: Detects the creation of an ADS (Alternate Data Stream) that contains an executable by looking at a non-empty Imphash references: - https://twitter.com/0xrawsec/status/1002478725605273600?s=21 author: Florian Roth (Nextron Systems), @0xrawsec date: 2018-06-03 modified: 2023-02-10 tags: - attack.stealth - attack.s0139 - attack.t1564.004 logsource: product: windows category: create_stream_hash definition: 'Requirements: Sysmon or equivalent configured with Imphash logging' detection: selection: Hash|contains: IMPHASH= filter_main_null: Hash|contains: IMPHASH=00000000000000000000000000000000 condition: selection and not 1 of filter_main_* falsepositives: - This rule isn't looking for any particular binary characteristics. As legitimate installers and programs were seen embedding hidden binaries in their ADS. Some false positives are expected from browser processes and similar. level: medium
Near-miss passage: Sigma rule: Detects potentially suspicious processes being spawned by a web server process which could be the result of a successful. Logsource: windows / process_creation. Rule: title: Suspicious Process By Web Server Process id: 8202070f-edeb-4d31-a010-a26c72ac5600 status: test description: 'Detects potentially suspicious processes being spawned by a web server process which could be the result of a successfully placed web shell or exploitation ' references: - https://media.defense.gov/2020/Jun/09/2002313081/-1/-1/0/CSI-DETECT-AND-PREVENT-WEB-SHELL-MALWARE-20200422.PDF author: Thomas Patzke, Florian Roth (Nextron Systems), Zach Stanford @svch0st, Tim Shelton, Nasreddine Bencherchali (Nextron Systems) date: 2019-01-16 modified: 2024-11-26 tags: - attack.persistence - attack.initial-access - attack.t1505.003 - attack.t1190 logsource: category: process_creation product: windows detection: selection_webserver_image: ParentImage|endswith: - \caddy.exe - \httpd.exe - \nginx.exe - \php-cgi.exe - \php.exe - \tomcat.exe - \UMWorkerProcess.exe - \w3wp.exe - \ws_TomcatService.exe selection_webserver_characteristics_tomcat1: ParentImage|endswith: - \java.exe - \javaw.exe ParentImage|contains: - -tomcat- - \tomcat selection_webserver_characteristics_tomcat2: ParentImage|endswith: - \java.exe - \javaw.exe ParentCommandLine|contains: - CATALINA_HOME - catalina.home - catalina.jar selection_anomaly_children: Image|endswith: - \arp.exe - \at.exe - \bash.exe - \bitsadmin.exe - \certutil.exe - \cmd.exe - \cscript.exe - \dsget.exe - \hostname.exe - \nbtstat.exe - \net.exe - \net1.exe - \netdom.exe - \netsh.exe - \nltest.exe - \ntdsutil.exe - \powershell_ise.exe - \powershell.exe - \pwsh.exe - \qprocess.exe - \query.exe - \qwinsta.exe - \reg.exe - \rundll32.exe - \sc.exe - \sh.exe - \wmic.exe - \wscript.exe - \wusa.exe filter_main_fp_1: ParentImage|endswith: \java.exe CommandLine|endswith: Windows\system32\cmd.exe /c C:\ManageEngine\ADManager "Plus\ES\bin\elasticsearch.bat -Enode.name=RMP-NODE1 -pelasticsearch-pid.txt filter_main_fp_2: ParentImage|endswith: \java.exe CommandLine|contains|all: - sc query - ADManager Plus condition: 1 of selection_webserver_* and selection_anomaly_children and not 1 of filter_main_* falsepositives: - Particular web applications may spawn a shell process legitimately level: high