Analysis

  • max time kernel
    144s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-08-2024 00:48

General

  • Target

    2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe

  • Size

    592KB

  • MD5

    8ca8d1fe960a2b10d28ba017a8e71e10

  • SHA1

    2157e3dff5041988706756723655d5501ae8148f

  • SHA256

    566faf9961e590ce146c85c70fc08191682a20166d852ace3a269c418135cfb4

  • SHA512

    475ce76b2ed0ca3d2284fb9e3cc4ae4aad0b7e9eba21bf615dd1f23bf6d3d150e472dee430884d2243e6b02509c46b2c5c796122aba076f828015c050df6eccd

  • SSDEEP

    12288:qpFbY22u8RFARyGfQ3MWTZfV/hlBg1ddAAZkR:qpxY2CkyGob9/lkAp

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

5.252.165.55:1987

Mutex

AsyncMutex_6SI2OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    NOTES.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 14 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 31 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4812
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2124
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\DRcaHBxZZHGD.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:708
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\DRcaHBxZZHGD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4C56.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:364
    • C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe
      "C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe"
      2⤵
        PID:1764
      • C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe
        "C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe"
        2⤵
          PID:3100
        • C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe
          "C:\Users\Admin\AppData\Local\Temp\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe"
          2⤵
          • Checks computer location settings
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1692
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "NOTES" /tr '"C:\Users\Admin\AppData\Roaming\NOTES.exe"' & exit
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:4308
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /f /sc onlogon /rl highest /tn "NOTES" /tr '"C:\Users\Admin\AppData\Roaming\NOTES.exe"'
              4⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:876
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5E57.tmp.bat""
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:1564
            • C:\Windows\SysWOW64\timeout.exe
              timeout 3
              4⤵
              • System Location Discovery: System Language Discovery
              • Delays execution with timeout.exe
              PID:2320
            • C:\Users\Admin\AppData\Roaming\NOTES.exe
              "C:\Users\Admin\AppData\Roaming\NOTES.exe"
              4⤵
              • Checks computer location settings
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:1720
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\NOTES.exe"
                5⤵
                • Command and Scripting Interpreter: PowerShell
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1460
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\DRcaHBxZZHGD.exe"
                5⤵
                • Command and Scripting Interpreter: PowerShell
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2584
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\DRcaHBxZZHGD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9DC2.tmp"
                5⤵
                • System Location Discovery: System Language Discovery
                • Scheduled Task/Job: Scheduled Task
                PID:4952
              • C:\Users\Admin\AppData\Roaming\NOTES.exe
                "C:\Users\Admin\AppData\Roaming\NOTES.exe"
                5⤵
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:4284

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\2024-08-06_8ca8d1fe960a2b10d28ba017a8e71e10_hiddentear.exe.log

        Filesize

        1KB

        MD5

        8ec831f3e3a3f77e4a7b9cd32b48384c

        SHA1

        d83f09fd87c5bd86e045873c231c14836e76a05c

        SHA256

        7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

        SHA512

        26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

        Filesize

        2KB

        MD5

        968cb9309758126772781b83adb8a28f

        SHA1

        8da30e71accf186b2ba11da1797cf67f8f78b47c

        SHA256

        92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

        SHA512

        4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        18KB

        MD5

        d0374dc00d415095e353e55f8f47c044

        SHA1

        da1141847f9ae7c71d6298d8df0cb15e84a9407f

        SHA256

        d9f2cdd6d29974d4f0153d4d5a930fbdf5cb93f6a804855908905a5fa97b8bff

        SHA512

        05c2fdcc662868205830048d6b7d6ff1c495eb5f119711fd8654a970b02995158373976efadb64de1aa6301d34583f1b4f2f07076c8e32d917d950be8e981252

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        855B

        MD5

        c6d0e83757445d9477fe3ac039ea0082

        SHA1

        26108c5ffbc0f856fcf2cd5ca7cba6332ed0fc2a

        SHA256

        ec12b2a9a2702b49591d6b898665de3263f6100052dac25a41e20b16e3e899a7

        SHA512

        bd6c120245d1f7af6d67bf9914a75895bf380d2b8f883648b56030db948e1b4b7e5ea7ebd1511bb70a430f902dc04eaee68e563d13d58dd5321f0fb022f52963

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fs5hu14r.qlb.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\tmp4C56.tmp

        Filesize

        1KB

        MD5

        eed5a43b67ec549cecb9ba618b48c788

        SHA1

        e7ae4f3a27fb09311447aa47b50dd7d0fc61d2ec

        SHA256

        38c4e472e39b8e10309d57c28192cfbd72596b79c8ace2f64476bafa865a0226

        SHA512

        9c59ef3e4138a1701ab642e63c024bab5dd1a4003badc59344ee1c5446f66b7ece7bae2febc677a2e9047b6bba5b85079bf6589b67b470f07e0c132dc6e87563

      • C:\Users\Admin\AppData\Local\Temp\tmp5E57.tmp.bat

        Filesize

        149B

        MD5

        1ab79c7929957d7fc436c6b0d5ac23f2

        SHA1

        679e3d467b0fea9a339ce85ef315502e087e2c52

        SHA256

        37309324d90b4b4a50cc46be68a636a19d809d5f08301c6b4edfe34b1b800c13

        SHA512

        bf2e26058b24373856a33771e241bf1d67432fb9b1eb5f5309daa4b9712a8689a03bba900f25983c452ca15eb5cc9fe6eaac401081fd25e80d2092002d0c99be

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

        Filesize

        592KB

        MD5

        8ca8d1fe960a2b10d28ba017a8e71e10

        SHA1

        2157e3dff5041988706756723655d5501ae8148f

        SHA256

        566faf9961e590ce146c85c70fc08191682a20166d852ace3a269c418135cfb4

        SHA512

        475ce76b2ed0ca3d2284fb9e3cc4ae4aad0b7e9eba21bf615dd1f23bf6d3d150e472dee430884d2243e6b02509c46b2c5c796122aba076f828015c050df6eccd

      • memory/708-79-0x0000000007C70000-0x0000000007C7E000-memory.dmp

        Filesize

        56KB

      • memory/708-80-0x0000000007C80000-0x0000000007C94000-memory.dmp

        Filesize

        80KB

      • memory/708-36-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/708-35-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/708-63-0x0000000075340000-0x000000007538C000-memory.dmp

        Filesize

        304KB

      • memory/708-88-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/708-82-0x0000000007D60000-0x0000000007D68000-memory.dmp

        Filesize

        32KB

      • memory/708-81-0x0000000007D80000-0x0000000007D9A000-memory.dmp

        Filesize

        104KB

      • memory/708-24-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/708-77-0x0000000007CC0000-0x0000000007D56000-memory.dmp

        Filesize

        600KB

      • memory/1460-146-0x0000000007210000-0x0000000007224000-memory.dmp

        Filesize

        80KB

      • memory/1460-121-0x00000000057A0000-0x0000000005AF4000-memory.dmp

        Filesize

        3.3MB

      • memory/1460-145-0x00000000071D0000-0x00000000071E1000-memory.dmp

        Filesize

        68KB

      • memory/1460-134-0x0000000006E90000-0x0000000006F33000-memory.dmp

        Filesize

        652KB

      • memory/1460-124-0x0000000075370000-0x00000000753BC000-memory.dmp

        Filesize

        304KB

      • memory/1460-123-0x0000000005CE0000-0x0000000005D2C000-memory.dmp

        Filesize

        304KB

      • memory/1692-46-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/2124-18-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/2124-76-0x00000000076F0000-0x00000000076FA000-memory.dmp

        Filesize

        40KB

      • memory/2124-49-0x0000000006360000-0x000000000637E000-memory.dmp

        Filesize

        120KB

      • memory/2124-50-0x00000000063F0000-0x000000000643C000-memory.dmp

        Filesize

        304KB

      • memory/2124-51-0x0000000006920000-0x0000000006952000-memory.dmp

        Filesize

        200KB

      • memory/2124-52-0x0000000075340000-0x000000007538C000-memory.dmp

        Filesize

        304KB

      • memory/2124-62-0x0000000006900000-0x000000000691E000-memory.dmp

        Filesize

        120KB

      • memory/2124-69-0x0000000007530000-0x00000000075D3000-memory.dmp

        Filesize

        652KB

      • memory/2124-30-0x0000000005D30000-0x0000000006084000-memory.dmp

        Filesize

        3.3MB

      • memory/2124-75-0x0000000007680000-0x000000000769A000-memory.dmp

        Filesize

        104KB

      • memory/2124-74-0x0000000007CC0000-0x000000000833A000-memory.dmp

        Filesize

        6.5MB

      • memory/2124-15-0x0000000002A70000-0x0000000002AA6000-memory.dmp

        Filesize

        216KB

      • memory/2124-20-0x0000000005AC0000-0x0000000005AE2000-memory.dmp

        Filesize

        136KB

      • memory/2124-78-0x0000000007880000-0x0000000007891000-memory.dmp

        Filesize

        68KB

      • memory/2124-22-0x0000000005B60000-0x0000000005BC6000-memory.dmp

        Filesize

        408KB

      • memory/2124-23-0x0000000005BD0000-0x0000000005C36000-memory.dmp

        Filesize

        408KB

      • memory/2124-19-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/2124-16-0x0000000005460000-0x0000000005A88000-memory.dmp

        Filesize

        6.2MB

      • memory/2124-17-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/2124-87-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/2584-135-0x0000000075370000-0x00000000753BC000-memory.dmp

        Filesize

        304KB

      • memory/4812-0-0x0000000074A9E000-0x0000000074A9F000-memory.dmp

        Filesize

        4KB

      • memory/4812-10-0x000000000C3E0000-0x000000000C47C000-memory.dmp

        Filesize

        624KB

      • memory/4812-9-0x00000000092F0000-0x0000000009344000-memory.dmp

        Filesize

        336KB

      • memory/4812-8-0x0000000005D80000-0x0000000005D96000-memory.dmp

        Filesize

        88KB

      • memory/4812-7-0x0000000005D70000-0x0000000005D7E000-memory.dmp

        Filesize

        56KB

      • memory/4812-6-0x0000000005C20000-0x0000000005C38000-memory.dmp

        Filesize

        96KB

      • memory/4812-5-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/4812-48-0x0000000074A90000-0x0000000075240000-memory.dmp

        Filesize

        7.7MB

      • memory/4812-4-0x0000000005810000-0x000000000581A000-memory.dmp

        Filesize

        40KB

      • memory/4812-3-0x0000000005860000-0x00000000058F2000-memory.dmp

        Filesize

        584KB

      • memory/4812-2-0x0000000005E10000-0x00000000063B4000-memory.dmp

        Filesize

        5.6MB

      • memory/4812-1-0x0000000000D90000-0x0000000000E26000-memory.dmp

        Filesize

        600KB