Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/06/2024, 19:42

General

  • Target
    HAKPYTKA.exe
  • Size 10.8MB
  • Sample240625-yem9psyerc
  • SHA256 1a95e485f4ae28b3526839f632e2d199d0652ba9e05215138a8e6fc9df0299ac
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • DCRat payload 4 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 6 IoCs

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

  • Drops startup file 3 IoCs
  • Executes dropped EXE 10 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 15 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Delays execution with timeout.exe 2 IoCs
  • Kills process with taskkill 9 IoCs
  • Modifies registry class 4 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 38 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\HAKPYTKA.exe
    "C:\Users\Admin\AppData\Local\Temp\HAKPYTKA.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:4468
    • C:\Windows\C.exe
      "C:\Windows\C.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1472
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\BlockproviderComponentweb\LzYuX9pzQxeIw.vbe"
        3⤵
          PID:996
      • C:\Windows\appdata.exe
        "C:\Windows\appdata.exe"
        2⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:1968
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\BlockproviderComponentweb\FlrU2Sw3hI88Kq0oMKFqlJBcKKk7.vbe"
          3⤵
            PID:3196
        • C:\Windows\temp.exe
          "C:\Windows\temp.exe"
          2⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Modifies registry class
          • Suspicious use of WriteProcessMemory
          PID:3312
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\BlockproviderComponentweb\rLN2CzC2BGDm0saFwwqZ.vbe"
            3⤵
              PID:1220
          • C:\Windows\system.exe
            "C:\Windows\system.exe"
            2⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Modifies registry class
            • Suspicious use of WriteProcessMemory
            PID:2588
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\ProviderwebRuntimebrokerDll\AzoUH9rmryPf4YVykgERWga1ZsG.vbe"
              3⤵
                PID:2628
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Windows\bat.bat" "
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:4572
              • C:\Windows\system32\timeout.exe
                timeout 5 nul
                3⤵
                • Delays execution with timeout.exe
                PID:2944
              • C:\Windows\system32\timeout.exe
                timeout 3 nul
                3⤵
                • Delays execution with timeout.exe
                PID:3964
              • C:\Windows\TRXLoader.exe
                TRXLOADER
                3⤵
                • Executes dropped EXE
                PID:3884
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 3884 -s 1056
                  4⤵
                  • Program crash
                  PID:2648
            • C:\Windows\TRXLoader.exe
              "C:\Windows\TRXLoader.exe"
              2⤵
              • Executes dropped EXE
              PID:5000
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 5000 -s 1068
                3⤵
                • Program crash
                PID:4396
            • C:\Windows\kiler.exe
              "C:\Windows\kiler.exe"
              2⤵
              • Checks computer location settings
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4000
              • C:\Windows\SysWOW64\TASKKILL.exe
                TASKKILL /F /IM wscript.exe
                3⤵
                • Kills process with taskkill
                • Suspicious use of AdjustPrivilegeToken
                PID:1496
              • C:\Windows\SysWOW64\TASKKILL.exe
                TASKKILL /F /IM cmd.exe
                3⤵
                • Kills process with taskkill
                • Suspicious use of AdjustPrivilegeToken
                PID:4932
              • C:\Users\Admin\AppData\Local\Temp\kiler.exe
                "C:\Users\Admin\AppData\Local\Temp\kiler.exe"
                3⤵
                • Drops startup file
                • Executes dropped EXE
                • Adds Run key to start application
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:4004
                • C:\Windows\SysWOW64\TASKKILL.exe
                  TASKKILL /F /IM wscript.exe
                  4⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3352
                • C:\Windows\SysWOW64\TASKKILL.exe
                  TASKKILL /F /IM cmd.exe
                  4⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1220
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /f im Wireshark.exe
                  4⤵
                  • Kills process with taskkill
                  PID:4248
                • C:\Windows\SysWOW64\schtasks.exe
                  schtasks /delete /tn "MicrosoftEdgeUpdateTaskMachine" /f
                  4⤵
                    PID:2100
                  • C:\Windows\SysWOW64\schtasks.exe
                    schtasks /create /sc minute /mo 1 /tn "MicrosoftEdgeUpdateTaskMachine" /tr C:\Users\Admin\AppData\Local\Temp\kiler.exe
                    4⤵
                    • Scheduled Task/Job: Scheduled Task
                    PID:3276
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 5 & Del "C:\Windows\kiler.exe"
                  3⤵
                  • Suspicious use of WriteProcessMemory
                  PID:3080
                  • C:\Windows\SysWOW64\choice.exe
                    choice /C Y /N /D Y /T 5
                    4⤵
                      PID:3020
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 5000 -ip 5000
                1⤵
                  PID:4920
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 3884 -ip 3884
                  1⤵
                    PID:4900
                  • C:\Users\Admin\AppData\Local\Temp\kiler.exe
                    C:\Users\Admin\AppData\Local\Temp\kiler.exe
                    1⤵
                    • Executes dropped EXE
                    • Suspicious use of AdjustPrivilegeToken
                    PID:4988
                    • C:\Windows\SysWOW64\TASKKILL.exe
                      TASKKILL /F /IM wscript.exe
                      2⤵
                      • Kills process with taskkill
                      • Suspicious use of AdjustPrivilegeToken
                      PID:3844
                    • C:\Windows\SysWOW64\TASKKILL.exe
                      TASKKILL /F /IM cmd.exe
                      2⤵
                      • Kills process with taskkill
                      • Suspicious use of AdjustPrivilegeToken
                      PID:5024
                  • C:\Users\Admin\AppData\Local\Temp\kiler.exe
                    C:\Users\Admin\AppData\Local\Temp\kiler.exe
                    1⤵
                    • Executes dropped EXE
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3128
                    • C:\Windows\SysWOW64\TASKKILL.exe
                      TASKKILL /F /IM wscript.exe
                      2⤵
                      • Kills process with taskkill
                      • Suspicious use of AdjustPrivilegeToken
                      PID:4000
                    • C:\Windows\SysWOW64\TASKKILL.exe
                      TASKKILL /F /IM cmd.exe
                      2⤵
                      • Kills process with taskkill
                      • Suspicious use of AdjustPrivilegeToken
                      PID:2364

                  Network

                        MITRE ATT&CK Enterprise v15

                        Replay Monitor

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                        Downloads

                        LzYuX9pzQxeIw.vbe

                        • Path C:\BlockproviderComponentweb\LzYuX9pzQxeIw.vbe
                        • Size 224B
                        • SHA256 b0ebc32dafa29a57b91c73ac0b89242da68d40cd470c262d4cc0361ba0cd8b95
                        • MD5 SHA1 SHA512

                        AzoUH9rmryPf4YVykgERWga1ZsG.vbe

                        • Path C:\ProviderwebRuntimebrokerDll\AzoUH9rmryPf4YVykgERWga1ZsG.vbe
                        • Size 227B
                        • SHA256 c21e88d44eb247ab02667e37de05d2e10ecc27bdfdc0f380778494570b5377db
                        • MD5 SHA1 SHA512

                        kiler.exe.log

                        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\kiler.exe.log
                        • Size 319B
                        • SHA256 d182dd648c92e41cd62dccc65f130c07f0a96c03b32f907c3d1218e9aa5bda03
                        • MD5 SHA1 SHA512

                        rLN2CzC2BGDm0saFwwqZ.vbe

                        • Path C:\Users\Admin\AppData\Local\Temp\BlockproviderComponentweb\rLN2CzC2BGDm0saFwwqZ.vbe
                        • Size 214B
                        • SHA256 25f85a5bcaed5fadfba4b5368f224468e602e8991225b1fc2176cec26672cd81
                        • MD5 SHA1 SHA512

                        FlrU2Sw3hI88Kq0oMKFqlJBcKKk7.vbe

                        • Path C:\Users\Admin\AppData\Roaming\BlockproviderComponentweb\FlrU2Sw3hI88Kq0oMKFqlJBcKKk7.vbe
                        • Size 215B
                        • SHA256 32eaa92211f658207acdfa9cf61ffb6ec96330e6918d35943c3562a8323bcc37
                        • MD5 SHA1 SHA512

                        C.exe

                        • Path C:\Windows\C.exe
                        • Size 3.1MB
                        • SHA256 fb1ad76b6875612578539b3bf70c93438165465dd6b4cd128a692cfed974e5f7
                        • MD5 SHA1 SHA512 SSDEEP

                        TRXLoader.exe

                        • Path C:\Windows\TRXLoader.exe
                        • Size 260KB
                        • SHA256 0b58a2bed7d9d44e29ad6988250456c49863a23adeb9b5ab59763352187104b3
                        • MD5 SHA1 SHA512 SSDEEP

                        appdata.exe

                        • Path C:\Windows\appdata.exe
                        • Size 3.1MB
                        • SHA256 0813184d94537f7f52e27a48733ce01ab3f8a40c807f8b1e3e876a0857270b98
                        • MD5 SHA1 SHA512 SSDEEP

                        bat.bat

                        • Path C:\Windows\bat.bat
                        • Size 119B
                        • SHA256 00152452af8ee061522a67570238605f9c2e1d41a92bd49fd8e476f8e824cf1a
                        • MD5 SHA1 SHA512

                        kiler.exe

                        • Path C:\Windows\kiler.exe
                        • Size 249KB
                        • SHA256 77d822158965fe6c07d02d6fd22590f2fd5b67b0fb2f1f0b080bf8f627687c63
                        • MD5 SHA1 SHA512 SSDEEP

                        system.exe

                        • Path C:\Windows\system.exe
                        • Size 3.1MB
                        • SHA256 7d0a7d85531fa4e95cad06073ce5fc918c1a1607f8b7c3da9ea0d765d3ab9dad
                        • MD5 SHA1 SHA512 SSDEEP

                        temp.exe

                        • Path C:\Windows\temp.exe
                        • Size 3.1MB
                        • SHA256 3cb7f2e31e0d726f91631cdc0a44e8c97282e48a23a76521346df13f159d6e16
                        • MD5 SHA1 SHA512 SSDEEP

                        memory/5000-61-0x00000000009D0000-0x0000000000A16000-memory.dmp