Query: Sigma YAML for windows / process_creation
Matching passage: Sigma rule: Detects a suspicious child process of a Microsoft HTML Help (HH.exe). Logsource: windows / process_creation. Rule: title: HTML Help HH.EXE Suspicious Child Process id: 52cad028-0ff0-4854-8f67-d25dfcbc78b4 status: test description: Detects a suspicious child process of a Microsoft HTML Help (HH.exe) references: - https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/chm-badness-delivers-a-banking-trojan/ - https://github.com/elastic/protections-artifacts/commit/746086721fd385d9f5c6647cada1788db4aea95f#diff-27939090904026cc396b0b629c8e4314acd6f5dac40a676edbc87f4567b47eb7 - https://www.ptsecurity.com/ww-en/analytics/pt-esc-threat-intelligence/higaisa-or-winnti-apt-41-backdoors-old-and-new/ - https://www.zscaler.com/blogs/security-research/unintentional-leak-glimpse-attack-vectors-apt37 author: Maxim Pavlunin, Nasreddine Bencherchali (Nextron Systems) date: 2020-04-01 modified: 2023-04-12 tags: - attack.execution - attack.initial-access - attack.stealth - attack.t1047 - attack.t1059.001 - attack.t1059.003 - attack.t1059.005 - attack.t1059.007 - attack.t1218 - attack.t1218.001 - attack.t1218.010 - attack.t1218.011 - attack.t1566 - attack.t1566.001 logsource: category: process_creation product: windows detection: selection: ParentImage|endswith: \hh.exe Image|endswith: - \CertReq.exe - \CertUtil.exe - \cmd.exe - \cscript.exe - \installutil.exe - \MSbuild.exe - \MSHTA.EXE - \msiexec.exe - \powershell.exe - \pwsh.exe - \regsvr32.exe - \rundll32.exe - \schtasks.exe - \wmic.exe - \wscript.exe condition: selection falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects attempts to delete Internet Information Services (IIS) log files via command line utilities, which is a common d. Logsource: windows / process_creation. Rule: title: IIS WebServer Log Deletion via CommandLine Utilities id: 0649be4a-aeb0-45b0-b89e-7f1668f6d9c0 related: - id: 3eb8c339-a765-48cc-a150-4364c04652bf type: similar status: experimental description: 'Detects attempts to delete Internet Information Services (IIS) log files via command line utilities, which is a common defense evasion technique used by attackers to cover their tracks. Threat actors often abuse vulnerabilities in web applications hosted on IIS servers to gain initial access and later delete IIS logs to evade detection. ' references: - https://learn.microsoft.com/en-us/iis/manage/provisioning-and-managing-iis/managing-iis-log-file-storage author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-09-02 tags: - attack.stealth - attack.t1070 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \cmd.exe - \powershell_ise.exe - \powershell.exe - \pwsh.exe - OriginalFileName: - cmd.exe - powershell.exe - powershell_ise.exe - pwsh.dll selection_cli_del: CommandLine|contains: - 'del ' - 'erase ' - 'rm ' - 'remove-item ' - 'rmdir ' selection_cli_iis_dir: CommandLine|contains: \inetpub\logs\ condition: all of selection_* falsepositives: - Deletion of IIS logs that are older than a certain retention period as part of regular maintenance activities. - Legitimate schedule tasks or scripts that clean up log files regularly. level: medium