Query: Sigma rule 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: Detects command line activity that tries to clear or disable any ETW trace log which could be a sign of logging evasion.. Logsource: windows / process_creation. Rule: title: ETW Trace Evasion Activity id: a238b5d0-ce2d-4414-a676-7a531b3d13d6 status: test description: 'Detects command line activity that tries to clear or disable any ETW trace log which could be a sign of logging evasion. ' references: - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/wevtutil - https://abuse.io/lockergoga.txt - https://medium.com/palantir/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63 author: '@neu5ron, Florian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.community' date: 2019-03-22 modified: 2022-06-28 tags: - attack.stealth - attack.defense-impairment - attack.t1070 - attack.t1685 - car.2016-04-002 logsource: category: process_creation product: windows detection: selection_clear_1: CommandLine|contains|all: - cl - /Trace selection_clear_2: CommandLine|contains|all: - clear-log - /Trace selection_disable_1: CommandLine|contains|all: - sl - /e:false selection_disable_2: CommandLine|contains|all: - set-log - /e:false selection_disable_3: CommandLine|contains|all: - logman - update - trace - --p - -ets selection_pwsh_remove: CommandLine|contains: Remove-EtwTraceProvider selection_pwsh_set: CommandLine|contains|all: - Set-EtwTraceProvider - '0x11' condition: 1 of selection_* falsepositives: - Unknown level: high