Query: Sigma rule for Detects a suspicious copy operation that tries to copy a program from system (System32, SysWOW64, WinSxS) directories to
Matching passage: Sigma rule: Detects a suspicious copy operation that tries to copy a program from system (System32, SysWOW64, WinSxS) directories to. Logsource: windows / process_creation. Rule: title: Suspicious Copy From or To System Directory id: fff9d2b7-e11c-4a69-93d3-40ef66189767 related: - id: 855bc8b5-2ae8-402e-a9ed-b889e6df1900 type: derived status: test description: 'Detects a suspicious copy operation that tries to copy a program from system (System32, SysWOW64, WinSxS) directories to another on disk. Often used to move LOLBINs such as ''certutil'' or ''desktopimgdownldr'' to a different location with a different name in order to bypass detections based on locations. ' references: - https://www.hybrid-analysis.com/sample/8da5b75b6380a41eee3a399c43dfe0d99eeefaa1fd21027a07b1ecaa4cd96fdd?environmentId=120 - https://web.archive.org/web/20180331144337/https://www.fireeye.com/blog/threat-research/2018/03/sanny-malware-delivery-method-updated-in-recently-observed-attacks.html - https://thedfirreport.com/2023/08/28/html-smuggling-leads-to-domain-wide-ransomware/ author: Florian Roth (Nextron Systems), Markus Neis, Tim Shelton (HAWK.IO), Nasreddine Bencherchali (Nextron Systems) date: 2020-07-03 modified: 2026-03-16 tags: - attack.stealth - attack.t1036.003 logsource: category: process_creation product: windows detection: selection_img_cmd: Image|endswith: \cmd.exe CommandLine|contains: 'copy ' selection_img_pwsh: Image|endswith: - \powershell.exe - \pwsh.exe CommandLine|contains: - copy-item - ' copy ' - 'cpi ' - ' cp ' selection_img_other: - Image|endswith: - \robocopy.exe - \xcopy.exe - OriginalFileName: - robocopy.exe - XCOPY.EXE selection_target: CommandLine|re|i: \s['"]?C:\\Windows\\(?:System32|SysWOW64|WinSxS) filter_optional_avira: Image|endswith: \cmd.exe CommandLine|contains|all: - /c copy - \Temp\ - \avira_system_speedup.exe CommandLine|contains: - C:\Program Files\Avira\ - C:\Program Files (x86)\Avira\ condition: 1 of selection_img_* and selection_target and not 1 of filter_optional_* falsepositives: - Depend on scripts and administrative tools used in the monitored environment (For example an admin scripts like https://www.itexperience.net/sccm-batch-files-and-32-bits-processes-on-64-bits-os/) - When cmd.exe and xcopy.exe are called directly - When the command contains the keywords but not in the correct order level: medium
Near-miss passage: Sigma rule: Detects installation of new shim databases that try to patch sections of known processes for potential process injection. Logsource: windows / registry_set. Rule: title: Suspicious Shim Database Patching Activity id: bf344fea-d947-4ef4-9192-34d008315d3a status: test description: Detects installation of new shim databases that try to patch sections of known processes for potential process injection or persistence. references: - https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/pillowmint-fin7s-monkey-thief/ - https://www.fireeye.com/blog/threat-research/2017/05/fin7-shim-databases-persistence.html author: Nasreddine Bencherchali (Nextron Systems) date: 2023-08-01 modified: 2023-12-06 tags: - attack.privilege-escalation - attack.persistence - attack.t1546.011 logsource: category: registry_set product: windows detection: selection: TargetObject|contains: \SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Custom\ TargetObject|endswith: - \csrss.exe - \dllhost.exe - \explorer.exe - \RuntimeBroker.exe - \services.exe - \sihost.exe - \svchost.exe - \taskhostw.exe - \winlogon.exe - \WmiPrvSe.exe condition: selection falsepositives: - Unknown level: high