{"id":"e8a95b5e-c891-46e2-b33a-93937d3abc31","title":"Suspicious HH.EXE Execution","description":"Detects a suspicious execution of a Microsoft HTML Help (HH.exe)","author":"Maxim Pavlunin","status":"test","level":"high","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"],"technique_ids":["T1047","T1059.001","T1059.003","T1059.005","T1059.007","T1218","T1218.001","T1218.010","T1218.011","T1566","T1566.001"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"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"],"source_path":"rules/windows/process_creation/proc_creation_win_hh_susp_execution.yml","source_sha256":"f231c06adee451e0d209b7cbc603fbd8cabc0265f0323fbd9d2d34eafa37dcb6","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_hh_susp_execution.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious HH.EXE Execution\nid: e8a95b5e-c891-46e2-b33a-93937d3abc31\nstatus: test\ndescription: Detects a suspicious execution of a Microsoft HTML Help (HH.exe)\nreferences:\n    - https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/chm-badness-delivers-a-banking-trojan/\n    - https://github.com/elastic/protections-artifacts/commit/746086721fd385d9f5c6647cada1788db4aea95f#diff-27939090904026cc396b0b629c8e4314acd6f5dac40a676edbc87f4567b47eb7\n    - https://www.ptsecurity.com/ww-en/analytics/pt-esc-threat-intelligence/higaisa-or-winnti-apt-41-backdoors-old-and-new/\n    - https://www.zscaler.com/blogs/security-research/unintentional-leak-glimpse-attack-vectors-apt37\nauthor: Maxim Pavlunin\ndate: 2020-04-01\nmodified: 2023-04-12\ntags:\n    - attack.execution\n    - attack.initial-access\n    - attack.stealth\n    - attack.t1047\n    - attack.t1059.001\n    - attack.t1059.003\n    - attack.t1059.005\n    - attack.t1059.007\n    - attack.t1218\n    - attack.t1218.001\n    - attack.t1218.010\n    - attack.t1218.011\n    - attack.t1566\n    - attack.t1566.001\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - OriginalFileName: 'HH.exe'\n        - Image|endswith: '\\hh.exe'\n    selection_paths:\n        CommandLine|contains:\n            - '.application'\n            - '\\AppData\\Local\\Temp\\'\n            - '\\Content.Outlook\\'\n            - '\\Downloads\\'\n            - '\\Users\\Public\\'\n            - '\\Windows\\Temp\\'\n            # - '\\AppData\\Local\\Temp\\Temp?_'\n            # - '\\AppData\\Local\\Temp\\Rar$'\n            # - '\\AppData\\Local\\Temp\\7z'\n            # - '\\AppData\\Local\\Temp\\wz'\n            # - '\\AppData\\Local\\Temp\\peazip-tmp'\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1047","id":"T1047","name":"Windows Management Instrumentation","page":"techniques/enterprise/T1047/"},{"key":"enterprise/T1059.001","id":"T1059.001","name":"PowerShell","page":"techniques/enterprise/T1059.001/"},{"key":"enterprise/T1059.003","id":"T1059.003","name":"Windows Command Shell","page":"techniques/enterprise/T1059.003/"},{"key":"enterprise/T1059.005","id":"T1059.005","name":"Visual Basic","page":"techniques/enterprise/T1059.005/"},{"key":"enterprise/T1059.007","id":"T1059.007","name":"JavaScript","page":"techniques/enterprise/T1059.007/"},{"key":"enterprise/T1218","id":"T1218","name":"System Binary Proxy Execution","page":"techniques/enterprise/T1218/"},{"key":"enterprise/T1218.001","id":"T1218.001","name":"Compiled HTML File","page":"techniques/enterprise/T1218.001/"},{"key":"enterprise/T1218.010","id":"T1218.010","name":"Regsvr32","page":"techniques/enterprise/T1218.010/"},{"key":"enterprise/T1218.011","id":"T1218.011","name":"Rundll32","page":"techniques/enterprise/T1218.011/"},{"key":"enterprise/T1566","id":"T1566","name":"Phishing","page":"techniques/enterprise/T1566/"},{"key":"enterprise/T1566.001","id":"T1566.001","name":"Spearphishing Attachment","page":"techniques/enterprise/T1566.001/"}],"data_path":"data/detection-rules/e8a95b5e-c891-46e2-b33a-93937d3abc31.json","kind":"sigma"}