Query: Sigma rule for Detects a process memory dump via "comsvcs.dll" using rundll32, covering multiple different techniques (ordinal, minidum
Matching passage: Sigma rule: Detects a process memory dump via "comsvcs.dll" using rundll32, covering multiple different techniques (ordinal, minidum. Logsource: windows / process_creation. Rule: title: Process Memory Dump Via Comsvcs.DLL id: 646ea171-dded-4578-8a4d-65e9822892e3 related: - id: 09e6d5c0-05b8-4ff8-9eeb-043046ec774c type: obsolete status: test description: Detects a process memory dump via "comsvcs.dll" using rundll32, covering multiple different techniques (ordinal, minidump function, etc.) references: - https://twitter.com/shantanukhande/status/1229348874298388484 - https://twitter.com/pythonresponder/status/1385064506049630211?s=21 - https://twitter.com/Hexacorn/status/1224848930795552769 - https://modexp.wordpress.com/2019/08/30/minidumpwritedump-via-com-services-dll/ - https://twitter.com/SBousseaden/status/1167417096374050817 - https://twitter.com/Wietze/status/1542107456507203586 - https://github.com/Hackndo/lsassy/blob/14d8f8ae596ecf22b449bfe919829173b8a07635/lsassy/dumpmethod/comsvcs.py - https://www.youtube.com/watch?v=52tAmVLg1KM&t=2070s author: Florian Roth (Nextron Systems), Modexp, Nasreddine Bencherchali (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems) date: 2020-02-18 modified: 2025-02-23 tags: - attack.credential-access - attack.stealth - attack.t1036 - attack.t1003.001 - car.2013-05-009 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \rundll32.exe - OriginalFileName: RUNDLL32.EXE - CommandLine|contains: rundll32 selection_cli_1: CommandLine|contains|all: - comsvcs - full CommandLine|contains: - '#-' - '#+' - '#24' - '24 ' - MiniDump - '#65560' selection_generic: CommandLine|contains|all: - '24' - comsvcs - full CommandLine|contains: - ' #' - ',#' - ', #' - '"#' condition: (selection_img and 1 of selection_cli_*) or selection_generic falsepositives: - Unlikely level: high
Near-miss passage: Sigma rule: Detects PowerShell module creation where the module Contents are set to "function Get-VMRemoteFXPhysicalVideoAdapter". T. Logsource: windows / powershell-classic. Rule: title: Potential RemoteFXvGPUDisablement.EXE Abuse id: f65e22f9-819e-4f96-9c7b-498364ae7a25 related: - id: a6fc3c46-23b8-4996-9ea2-573f4c4d88c5 type: similar - id: 38a7625e-b2cb-485d-b83d-aff137d859f4 type: similar - id: cacef8fc-9d3d-41f7-956d-455c6e881bc5 type: similar status: test description: Detects PowerShell module creation where the module Contents are set to "function Get-VMRemoteFXPhysicalVideoAdapter". This could be a sign of potential abuse of the "RemoteFXvGPUDisablement.exe" binary which is known to be vulnerable to module load-order hijacking. references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218/T1218.md - https://github.com/redcanaryco/AtomicTestHarnesses/blob/7e1e4da116801e3d6fcc6bedb207064577e40572/TestHarnesses/T1218_SignedBinaryProxyExecution/InvokeRemoteFXvGPUDisablementCommand.ps1 author: frack113, Nasreddine Bencherchali (Nextron Systems) date: 2021-07-13 modified: 2023-05-09 tags: - attack.stealth - attack.t1218 logsource: product: windows service: powershell-classic definition: fields have to be extract from event detection: selection: Data|contains: ModuleContents=function Get-VMRemoteFXPhysicalVideoAdapter { condition: selection falsepositives: - Unknown level: high