Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 03:52

General

  • Target
    main.exe
  • Size 93.0MB
  • Sample240329-efav8ahf74
  • SHA256 45ca8ba08363bfb80551cd15ee9958934039bede8de0c588d23ef8ced100b0f2
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Extracted

Family
  • asyncrat

Version
  • 1.0.7

Botnet
  • Default

C2
  • 127.0.0.1:5050

  • 127.0.0.1:36301

  • character-acquisitions.gl.at.ply.gg:5050

  • character-acquisitions.gl.at.ply.gg:36301

Mutex
  • DcRatMutex_qwqdanchun

Attributes
  • delay

    1

  • install

    true

  • install_file

    DO NOT DELETE COMPUTER AT RISK.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 26 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\main.exe
    "C:\Users\Admin\AppData\Local\Temp\main.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4480
    • C:\Windows\system32\cmd.exe
      cmd.exe /C call powershell -E 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
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3624
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -E 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
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2232
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\5wxvyaim\5wxvyaim.cmdline"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2020
          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
            C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES414F.tmp" "c:\Users\Admin\AppData\Local\Temp\5wxvyaim\CSC5BDADDE14EB540C8B02CC635FC30FB.TMP"
            5⤵
              PID:3620
      • C:\Windows\system32\cmd.exe
        cmd.exe /C call C:\Users\Admin\AppData\Local\Temp\KDoTemp.bat
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1840
        • C:\Windows\system32\findstr.exe
          findstr /e "'v" "C:\Users\Admin\AppData\Local\Temp\KDoTemp.bat"
          3⤵
            PID:4668
          • C:\Windows\system32\cscript.exe
            cscript //nologo C:\Users\Admin\AppData\Local\Temp\x.vbs
            3⤵
              PID:3836
            • C:\Users\Admin\AppData\Local\Temp\x.exe
              C:\Users\Admin\AppData\Local\Temp\x.exe
              3⤵
              • Checks computer location settings
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:2328
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "DO NOT DELETE COMPUTER AT RISK" /tr '"C:\Users\Admin\AppData\Roaming\DO NOT DELETE COMPUTER AT RISK.exe"' & exit
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:4640
                • C:\Windows\system32\schtasks.exe
                  schtasks /create /f /sc onlogon /rl highest /tn "DO NOT DELETE COMPUTER AT RISK" /tr '"C:\Users\Admin\AppData\Roaming\DO NOT DELETE COMPUTER AT RISK.exe"'
                  5⤵
                  • Creates scheduled task(s)
                  PID:3752
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp57A5.tmp.bat""
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:8
                • C:\Windows\system32\timeout.exe
                  timeout 3
                  5⤵
                  • Delays execution with timeout.exe
                  PID:4476
                • C:\Users\Admin\AppData\Roaming\DO NOT DELETE COMPUTER AT RISK.exe
                  "C:\Users\Admin\AppData\Roaming\DO NOT DELETE COMPUTER AT RISK.exe"
                  5⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4060
        • C:\Windows\system32\taskmgr.exe
          "C:\Windows\system32\taskmgr.exe" /4
          1⤵
            PID:1664
          • C:\Windows\system32\taskmgr.exe
            "C:\Windows\system32\taskmgr.exe" /4
            1⤵
              PID:4868
            • C:\Windows\system32\taskmgr.exe
              "C:\Windows\system32\taskmgr.exe" /4
              1⤵
                PID:2984

              Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    5wxvyaim.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\5wxvyaim\5wxvyaim.dll
                    • Size 3KB
                    • SHA256 25487d9f09c6e063edb620f24f4c9a9df483b50b7f07e90724c717b2a249359b
                    • MD5 SHA1 SHA512

                    KDoTemp.bat

                    • Path C:\Users\Admin\AppData\Local\Temp\KDoTemp.bat
                    • Size 243KB
                    • SHA256 5301cd2d2592ecf68b3fdfd00579aad8b4ee613e207b6f0d4312f0db16ed41d5
                    • MD5 SHA1 SHA512 SSDEEP

                    RES414F.tmp

                    • Path C:\Users\Admin\AppData\Local\Temp\RES414F.tmp
                    • Size 1KB
                    • SHA256 7f65fb4125b6460d2cbe7195ff6e0ba3016f19c225386e98e99b16c5fec8a01e
                    • MD5 SHA1 SHA512

                    __PSScriptPolicyTest_x0l00xvj.bby.ps1

                    • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x0l00xvj.bby.ps1
                    • Size 60B
                    • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                    • MD5 SHA1 SHA512

                    tmp57A5.tmp.bat

                    • Path C:\Users\Admin\AppData\Local\Temp\tmp57A5.tmp.bat
                    • Size 174B
                    • SHA256 3b9de67860d4dbae2f0f0ecf668e4d7494eab988157c266433a7a335ca7f6075
                    • MD5 SHA1 SHA512

                    x

                    • Path C:\Users\Admin\AppData\Local\Temp\x
                    • Size 203KB
                    • SHA256 646f3db20375176ba22c58b76a90c787bf766c3e7a55b5ac4bcbd9bc49134dfa
                    • MD5 SHA1 SHA512 SSDEEP

                    x

                    • Path C:\Users\Admin\AppData\Local\Temp\x
                    • Size 4KB
                    • SHA256 252f68c044e03be284e422625923a84698d913625274f0ad9f2a8f53dfeacad3
                    • MD5 SHA1 SHA512 SSDEEP

                    x.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\x.exe
                    • Size 148KB
                    • SHA256 808d11946d4d46d775157ee8d3d4b54af776d251fc3861eb75553878fadb98d3
                    • MD5 SHA1 SHA512 SSDEEP

                    x.vbs

                    • Path C:\Users\Admin\AppData\Local\Temp\x.vbs
                    • Size 380B
                    • SHA256 cf8268d158bb819ef158ff6ccbed64d5e379148a0adb1f73a082a01d56d0286b
                    • MD5 SHA1 SHA512

                    5wxvyaim.0.cs

                    • Path \??\c:\Users\Admin\AppData\Local\Temp\5wxvyaim\5wxvyaim.0.cs
                    • Size 737B
                    • SHA256 415199eec01052503978381a4f88f4cd970b441fedce519905990ed8b629b0f1
                    • MD5 SHA1 SHA512

                    5wxvyaim.cmdline

                    • Path \??\c:\Users\Admin\AppData\Local\Temp\5wxvyaim\5wxvyaim.cmdline
                    • Size 369B
                    • SHA256 04baf2795cf31c2024fac9b95c7a8fa4f17a4830c8e394aa16d6854ffccca163
                    • MD5 SHA1 SHA512

                    CSC5BDADDE14EB540C8B02CC635FC30FB.TMP

                    • Path \??\c:\Users\Admin\AppData\Local\Temp\5wxvyaim\CSC5BDADDE14EB540C8B02CC635FC30FB.TMP
                    • Size 652B
                    • SHA256 9243d8d3f31fd2478b5f5a54a4aa29761365b47f5caeb6906b6fa42ded1f9bce
                    • MD5 SHA1 SHA512

                    memory/2232-98-0x000001F5B9FC0000-0x000001F5B9FC8000-memory.dmp

                    memory/2232-121-0x00007FFAB67F0000-0x00007FFAB72B1000-memory.dmp

                    memory/2232-6-0x000001F5A1E60000-0x000001F5A1E82000-memory.dmp

                    memory/2328-2934-0x0000000000610000-0x000000000063A000-memory.dmp

                    memory/2328-2935-0x00007FFAB62A0000-0x00007FFAB6D61000-memory.dmp

                    memory/2328-2936-0x000000001B3B0000-0x000000001B3C0000-memory.dmp

                    memory/2328-2941-0x00007FFAB62A0000-0x00007FFAB6D61000-memory.dmp

                    memory/4060-2946-0x00007FFAB62A0000-0x00007FFAB6D61000-memory.dmp

                    memory/4060-2947-0x0000000003050000-0x0000000003060000-memory.dmp

                    memory/4060-2948-0x00007FFAB62A0000-0x00007FFAB6D61000-memory.dmp

                    memory/4060-2949-0x0000000003050000-0x0000000003060000-memory.dmp

                    memory/4480-1-0x0000017C2FD20000-0x0000017C30D20000-memory.dmp