Query: rule covering Detects potentially suspicious child processes of "Diskshadow.exe". This could be an attempt to bypass parent/child rela
Matching passage: Sigma rule: Detects potentially suspicious child processes of "Diskshadow.exe". This could be an attempt to bypass parent/child rela. Logsource: windows / process_creation. Rule: title: Potentially Suspicious Child Process Of DiskShadow.EXE id: 9f546b25-5f12-4c8d-8532-5893dcb1e4b8 related: - id: fa1a7e52-3d02-435b-81b8-00da14dd66c1 type: similar - id: 1dde5376-a648-492e-9e54-4241dd9b0c7f type: similar - id: 56b1dde8-b274-435f-a73a-fb75eb81262a type: similar - id: 0c2f8629-7129-4a8a-9897-7e0768f13ff2 type: similar status: test description: Detects potentially suspicious child processes of "Diskshadow.exe". This could be an attempt to bypass parent/child relationship detection or application whitelisting rules. 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 tags: - attack.stealth - attack.t1218 logsource: category: process_creation product: windows detection: selection: ParentImage|endswith: \diskshadow.exe Image|endswith: - \certutil.exe - \cscript.exe - \mshta.exe - \powershell.exe - \pwsh.exe - \regsvr32.exe - \rundll32.exe - \wscript.exe condition: selection falsepositives: - False postitve can occur in cases where admin scripts levreage the "exec" flag to execute applications level: medium
Near-miss passage: Sigma rule: Detects execution of "certmgr" with the "add" flag in order to install a new certificate on the system. Adversaries may. Logsource: windows / process_creation. Rule: title: New Root Certificate Installed Via CertMgr.EXE id: ff992eac-6449-4c60-8c1d-91c9722a1d48 related: - id: 42821614-9264-4761-acfc-5772c3286f76 type: derived - id: 46591fae-7a4c-46ea-aec3-dff5e6d785dc type: obsolete status: test description: 'Detects execution of "certmgr" with the "add" flag in order to install a new certificate on the system. Adversaries may install a root certificate on a compromised system to avoid warnings when connecting to adversary controlled web servers. ' references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1553.004/T1553.004.md - https://securelist.com/to-crypt-or-to-mine-that-is-the-question/86307/ author: oscd.community, @redcanary, Zach Stanford @svch0st date: 2023-03-05 tags: - attack.defense-impairment - attack.t1553.004 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \CertMgr.exe - OriginalFileName: CERTMGT.EXE selection_cli: CommandLine|contains|all: - /add - root condition: all of selection_* falsepositives: - Help Desk or IT may need to manually add a corporate Root CA on occasion. Need to test if GPO push doesn't trigger FP level: medium