Query: write Sigma for Detects the creation of user-specific or system-wide environment variables via the registry. Which contains suspicious c
Matching passage: Sigma rule: Detects the creation of user-specific or system-wide environment variables via the registry. Which contains suspicious c. Logsource: windows / registry_set. Rule: title: Suspicious Environment Variable Has Been Registered id: 966315ef-c5e1-4767-ba25-fce9c8de3660 status: test description: Detects the creation of user-specific or system-wide environment variables via the registry. Which contains suspicious commands and strings references: - https://infosec.exchange/@sbousseaden/109542254124022664 author: Nasreddine Bencherchali (Nextron Systems) date: 2022-12-20 modified: 2023-08-17 tags: - attack.persistence - attack.stealth logsource: product: windows category: registry_set detection: selection_main: TargetObject|contains: \Environment\ selection_details: - Details: - powershell - pwsh - Details|contains: - \AppData\Local\Temp\ - C:\Users\Public\ - TVqQAAMAAAAEAAAA - TVpQAAIAAAAEAA8A - TVqAAAEAAAAEABAA - TVoAAAAAAAAAAAAA - TVpTAQEAAAAEAAAA - SW52b2tlL - ludm9rZS - JbnZva2Ut - SQBuAHYAbwBrAGUALQ - kAbgB2AG8AawBlAC0A - JAG4AdgBvAGsAZQAtA - Details|startswith: - SUVY - SQBFAF - SQBuAH - cwBhA - aWV4 - aQBlA - R2V0 - dmFy - dgBhA - dXNpbm - H4sIA - Y21k - cABhAH - Qzpc - Yzpc condition: all of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects dropped files with double extensions, which is often used by malware as a method to abuse the fact that Windows. Logsource: windows / file_event. Rule: title: Suspicious Double Extension Files id: b4926b47-a9d7-434c-b3a0-adc3fa0bd13e related: - id: 1cdd9a09-06c9-4769-99ff-626e2b3991b8 type: derived - id: 3215aa19-f060-4332-86d5-5602511f3ca8 type: similar status: test description: Detects dropped files with double extensions, which is often used by malware as a method to abuse the fact that Windows hide default extensions by default. references: - https://www.crowdstrike.com/blog/meet-crowdstrikes-adversary-of-the-month-for-june-mustang-panda/ - https://www.anomali.com/blog/china-based-apt-mustang-panda-targets-minority-groups-public-and-private-sector-organizations - https://www.cybereason.com/blog/research/a-bazar-of-tricks-following-team9s-development-cycles - https://twitter.com/malwrhunterteam/status/1235135745611960321 - https://twitter.com/luc4m/status/1073181154126254080 - https://cloud.google.com/blog/topics/threat-intelligence/cybercriminals-weaponize-fake-ai-websites - https://vipre.com/blog/svg-phishing-attacks-the-new-trick-in-the-cybercriminals-playbook/ author: Nasreddine Bencherchali (Nextron Systems), frack113 date: 2022-06-19 modified: 2026-03-31 tags: - attack.stealth - attack.t1036.007 logsource: category: file_event product: windows detection: selection_gen: TargetFilename|endswith: - .exe - .iso - .rar - .svg - .zip TargetFilename|contains: - .doc. - .docx. - .gif. - .jpeg. - .jpg. - .mp3. - .mp4. - .pdf. - .png. - .ppt. - .pptx. - .rtf. - .svg. - .txt. - .xls. - .xlsx. selection_exe: TargetFilename|endswith: - .rar.exe - .zip.exe filter_icons_linux: TargetFilename|startswith: /usr/share/icons/ condition: 1 of selection_* and not 1 of filter_* falsepositives: - Unlikely level: high