Elastic low stable eql
Delayed Execution via Ping
Identifies the execution of commonly abused Windows utilities via a delayed Ping execution. This behavior is often observed during malware installation and is consistent with an attacker attempting to evade detection.
Detection Logic
sequence by process.parent.entity_id with maxspan=1m
[process where host.os.type == "windows" and event.action == "start" and process.name : "ping.exe" and
process.args : "-n" and process.parent.name : "cmd.exe" and not user.id : "S-1-5-18"]
[process where host.os.type == "windows" and event.action == "start" and
process.parent.name : "cmd.exe" and
(
process.name : (
"rundll32.exe", "powershell.exe",
"mshta.exe", "msbuild.exe",
"certutil.exe", "regsvr32.exe",
"powershell.exe", "cscript.exe",
"wscript.exe", "wmic.exe",
"installutil.exe", "msxsl.exe",
"Microsoft.Workflow.Compiler.exe",
"ieexec.exe", "iexpress.exe",
"RegAsm.exe", "installutil.exe",
"RegSvcs.exe", "RegAsm.exe"
) or
(process.executable : "?:\\Users\\*\\AppData\\*.exe" and not process.code_signature.trusted == true)
) and
not process.args : ("?:\\Program Files\\*", "?:\\Program Files (x86)\\*") and
not (process.name : ("openssl.exe", "httpcfg.exe", "certutil.exe") and process.parent.command_line : "*ScreenConnectConfigurator.cmd*") and
not (process.pe.original_file_name : "DPInst.exe" and process.command_line : "driver\\DPInst_x64 /f ") and
not (process.name : "powershell.exe" and process.args : "Write-Host ======*") and
not (process.name : "wscript.exe" and process.args : "launchquiet_args.vbs" and process.parent.args : "?:\\Windows\\TempInst\\7z*") and
not (process.name : "regsvr32.exe" and process.args : ("?:\\windows\\syswow64\\msxml?.dll", "msxml?.dll", "?:\\Windows\\SysWOW64\\mschrt20.ocx")) and
not (process.name : "wscript.exe" and
process.working_directory :
("?:\\Windows\\TempInst\\*",
"?:\\Users\\*\\AppData\\Local\\Temp\\BackupBootstrapper\\Logs\\",
"?:\\Users\\*\\AppData\\Local\\Temp\\QBTools\\"))
] Field Validations
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