Query: write Sigma for Detects execution of "Diskshadow.exe" in script mode to execute an script with a potentially uncommon extension. Initial
Matching passage: Sigma rule: Detects execution of "Diskshadow.exe" in script mode to execute an script with a potentially uncommon extension. Initial. Logsource: windows / process_creation. Rule: title: Diskshadow Script Mode - Uncommon Script Extension Execution id: 1dde5376-a648-492e-9e54-4241dd9b0c7f related: - id: fa1a7e52-3d02-435b-81b8-00da14dd66c1 type: similar - id: 9f546b25-5f12-4c8d-8532-5893dcb1e4b8 type: similar - id: 56b1dde8-b274-435f-a73a-fb75eb81262a type: similar - id: 0c2f8629-7129-4a8a-9897-7e0768f13ff2 type: similar status: test description: 'Detects execution of "Diskshadow.exe" in script mode to execute an script with a potentially uncommon extension. Initial baselining of the allowed extension list is required. ' references: - https://bohops.com/2018/03/26/diskshadow-the-return-of-vss-evasion-persistence-and-active-directory-database-extraction/ - https://www.ired.team/offensive-security/credential-access-and-credential-dumping/ntds.dit-enumeration - https://medium.com/@cyberjyot/lolbin-execution-via-diskshadow-f6ff681a27a4 - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/diskshadow - https://www.lifars.com/wp-content/uploads/2022/01/GriefRansomware_Whitepaper-2.pdf - https://www.zscaler.com/blogs/security-research/technical-analysis-crytox-ransomware - https://research.checkpoint.com/2022/evilplayout-attack-against-irans-state-broadcaster/ author: Nasreddine Bencherchali (Nextron Systems) date: 2023-09-15 modified: 2024-03-05 tags: - attack.stealth - attack.t1218 logsource: category: process_creation product: windows detection: selection_img: - OriginalFileName: diskshadow.exe - Image|endswith: \diskshadow.exe selection_flag: CommandLine|contains|windash: '-s ' filter_main_ext: CommandLine|contains: .txt condition: all of selection_* and not 1 of filter_main_* falsepositives: - False postitve might occur with legitimate or uncommon extensions used internally. Initial baseline is required. level: medium
Near-miss passage: Sigma rule: Identifies IPs performing DNS lookups associated with common Tor proxies.. Logsource: zeek / dns. Rule: title: DNS TOR Proxies id: a8322756-015c-42e7-afb1-436e85ed3ff5 related: - id: b55ca2a3-7cff-4dda-8bdd-c7bfa63bf544 type: similar - id: 8384bd26-bde6-4da9-8e5d-4174a7a47ca2 type: similar status: test description: Identifies IPs performing DNS lookups associated with common Tor proxies. references: - https://github.com/Azure/Azure-Sentinel/blob/f99542b94afe0ad2f19a82cc08262e7ac8e1428e/Detections/ASimDNS/imDNS_TorProxies.yaml author: Saw Winn Naung , Azure-Sentinel date: 2021-08-15 modified: 2025-09-12 tags: - attack.exfiltration - attack.t1048 logsource: service: dns product: zeek detection: selection: query|endswith: - .hiddenservice.net - .onion.ca - .onion.cab - .onion.casa - .onion.city - .onion.direct - .onion.dog - .onion.glass - .onion.gq - .onion.guide - .onion.in.net - .onion.ink - .onion.it - .onion.link - .onion.lt - .onion.lu - .onion.ly - .onion.mn - .onion.network - .onion.nu - .onion.pet - .onion.plus - .onion.pt - .onion.pw - .onion.rip - .onion.sh - .onion.si - .onion.to - .onion.top - .onion.ws - .onion - .s1.tor-gateways.de - .s2.tor-gateways.de - .s3.tor-gateways.de - .s4.tor-gateways.de - .s5.tor-gateways.de - .t2w.pw - .tor2web.ae.org - .tor2web.blutmagie.de - .tor2web.com - .tor2web.fi - .tor2web.io - .tor2web.org - .tor2web.xyz - .torlink.co condition: selection falsepositives: - Unknown level: medium