nemty_ransomware_lolbins_abuse

rule nemty_ransomware_lolbins_abuse {
 meta:
    author = "Ariel Millahuel"
    description = "Detects an attempt of Nemty Ransmoware in order to abuse LOLBins via command-line parameters  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/U4PcKi5sLUuE"
    version = "0.01"
    created = "2021-03-09"
    category = "process_creation"
    product = "windows"
    mitre = "execution, T1197, S0190"

  events:
(($selection1.metadata.product_event_type = "4688" or $selection1.metadata.product_event_type = "1") and (($selection1.target.process.file.full_path = "cmd.exe" and (re.regex($selection1.target.process.command_line, ` /c bitsadmin /transfer getitman /download /priority high http.*://.*\..*\..*\..*/jp\.exe %temp%.*\.exe&start %temp%.*\.exe,0,.*`) or re.regex($selection1.target.process.command_line, ` /c bitsadmin /transfer getitman /download /priority high https://.*\..*\..*\..*/.*\.exe %temp%.*\.exe&start %temp%.*\.exe,0,.*`))) or ($selection1.target.process.file.full_path = "bitsadmin.exe" and (re.regex($selection1.target.process.command_line, ` bitsadmin /transfer getitman /download /priority high http://.*\..*\..*\..*/jp\.exe %temp%.*\.exe&start %temp%.*\.exe,0,.*`) or re.regex($selection1.target.process.command_line, ` bitsadmin /transfer getitman /download /priority high https://.*\..*\..*\..*/.*\.exe %temp%.*\.exe&start %temp%.*\.exe,0,.*`)))))

  condition:
    $selection1
}