Analysis

  • max time kernel
    22s
  • max time network
    25s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    20/06/2024, 12:37

General

  • Target
    Cryptic Release V1.4.4/Cryptic Release V1.4.exe
  • Size 8.5MB
  • Sample240620-ptyvbasamr
  • SHA256 f99d78317fe908e8f863563f5b8662c21185dd256120b534dd3a3a842557fc3c
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

C2
  • 91.92.241.69:5555

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    Windows Runtime.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

    Using powershell.exe command.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 23 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • 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: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 31 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\Cryptic Release V1.4.4\Cryptic Release V1.4.exe
    "C:\Users\Admin\AppData\Local\Temp\Cryptic Release V1.4.4\Cryptic Release V1.4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3760
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHgAaAB4ACMAPgBBAGQAZAAtAFQAeQBwAGUAIAAtAEEAcwBzAGUAbQBiAGwAeQBOAGEAbQBlACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsAPAAjAGYAZwBtACMAPgBbAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwAuAE0AZQBzAHMAYQBnAGUAQgBvAHgAXQA6ADoAUwBoAG8AdwAoACcALgBHAEcALwBDAFIAWQBQAFQASQBDAFMAJwAsACcAJwAsACcATwBLACcALAAnAFcAYQByAG4AaQBuAGcAJwApADwAIwBwAGcAeQAjAD4A"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4860
    • C:\Users\Admin\AppData\Local\Temp\hex.exe
      "C:\Users\Admin\AppData\Local\Temp\hex.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2176
      • C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\hex.exe
        "C:\Users\Admin\AppData\Local\Temp\hex.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:3324
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\AIM\RuntimeBroker\RuntimeBroker.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2604
          • C:\Users\Admin\AppData\Local\Temp\AIM\RuntimeBroker\RuntimeBroker.exe
            C:\Users\Admin\AppData\Local\Temp\AIM\RuntimeBroker\RuntimeBroker.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:2076
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHYAagBrACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGEAdAB4ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHIAeAB4ACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGEAZQBkACMAPgA="
              6⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:3348
            • C:\Users\Admin\dllhost.exe
              "C:\Users\Admin\dllhost.exe"
              6⤵
              • Drops startup file
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious behavior: AddClipboardFormatListener
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:4220
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\dllhost.exe'
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1556
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'dllhost.exe'
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1864
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Windows Runtime.exe'
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4820
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Runtime.exe'
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:3944
              • C:\Windows\System32\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Runtime" /tr "C:\ProgramData\Windows Runtime.exe"
                7⤵
                • Scheduled Task/Job: Scheduled Task
                PID:3292
            • C:\Users\Admin\AppData\Local\Temp\nexusloader.exe
              "C:\Users\Admin\AppData\Local\Temp\nexusloader.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3332
              • C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\nexusloader.exe
                "C:\Users\Admin\AppData\Local\Temp\nexusloader.exe"
                7⤵
                • Executes dropped EXE
                • Loads dropped DLL
                • Suspicious use of SetWindowsHookEx
                PID:4920

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        RuntimeBroker.exe

        • Path C:\Users\Admin\AppData\Local\Temp\AIM\RuntimeBroker\RuntimeBroker.exe
        • Size 5.1MB
        • SHA256 1ac1ac8e20d280236c55e653643778a73a5ef8021c7279b5e66bed5aaaa9d2b9
        • MD5 SHA1 SHA512 SSDEEP

        _lzma.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_lzma.pyd
        • Size 149KB
        • SHA256 f125a885c10e1be4b12d988d6c19128890e7add75baa935fe1354721aa2dea3e
        • MD5 SHA1 SHA512 SSDEEP

        cacert.pem

        • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\certifi\cacert.pem
        • Size 285KB
        • SHA256 7a347ca8fef6e29f82b6e4785355a6635c17fa755e0940f65f15aa8fc7bd7f92
        • MD5 SHA1 SHA512 SSDEEP

        libssl-1_1.dll

        • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\libssl-1_1.dll
        • Size 678KB
        • SHA256 b7c0e42c1a60a2a062b899c8d4ebd0c50ef956177ba21785ce07c517c143aeaf
        • MD5 SHA1 SHA512 SSDEEP

        select.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\select.pyd
        • Size 25KB
        • SHA256 f1694ce82da997faa89a9d22d469bfc94abb0f2063a69ec9b953bc085c2cb823
        • MD5 SHA1 SHA512 SSDEEP

        tk86t.dll

        • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\tk86t.dll
        • Size 1.5MB
        • SHA256 bd4443b8ecc3b1f0c6fb13b264769253c80a4597af7181884bda20442038ec77
        • MD5 SHA1 SHA512 SSDEEP

        unicodedata.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\unicodedata.pyd
        • Size 1.1MB
        • SHA256 9b22d93f4db077a70a1d85ffc503980903f1a88e262068dd79c6190ec7a31b08
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_0fv3h34p.vr3.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0fv3h34p.vr3.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        hex.exe

        • Path C:\Users\Admin\AppData\Local\Temp\hex.exe
        • Size 8.5MB
        • SHA256 33b1633d1caa4f584a23604d0313c1832d67c29fb46a735b60a353afae898e3d
        • MD5 SHA1 SHA512 SSDEEP

        nexusloader.exe

        • Path C:\Users\Admin\AppData\Local\Temp\nexusloader.exe
        • Size 5.0MB
        • SHA256 07cd1743cd7a9aeae4c480dc59e19e1534a8477b13b64216e33d73565673e646
        • MD5 SHA1 SHA512 SSDEEP

        _bz2.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\_bz2.pyd
        • Size 78KB
        • SHA256 4c2649dc69a8874b91646723aacb84c565efeaa4277c46392055bca9a10497a8
        • MD5 SHA1 SHA512 SSDEEP

        _ctypes.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\_ctypes.pyd
        • Size 117KB
        • SHA256 35cdd122679041ebef264de5626b7805f3f66c8ae6cc451b8bc520be647fa007
        • MD5 SHA1 SHA512 SSDEEP

        _hashlib.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\_hashlib.pyd
        • Size 57KB
        • SHA256 50daeb3985302a8d85ce8167b0bf08b9da43e7d51ceae50e8e1cdfb0edf218c6
        • MD5 SHA1 SHA512 SSDEEP

        _multiprocessing.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\_multiprocessing.pyd
        • Size 29KB
        • SHA256 000486aaac9dd21e88b3dc65fd854dd83519b1fbcc224a70530bc3ec8cbd1a5d
        • MD5 SHA1 SHA512 SSDEEP

        _queue.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\_queue.pyd
        • Size 26KB
        • SHA256 9ecec72c5fe3c83c122043cad8ceb80d239d99d03b8ea665490bbced183ce42a
        • MD5 SHA1 SHA512 SSDEEP

        _socket.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\_socket.pyd
        • Size 72KB
        • SHA256 3669e56e99ae3a944fbe7845f0be05aea96a603717e883d56a27dc356f8c2f2c
        • MD5 SHA1 SHA512 SSDEEP

        _ssl.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\_ssl.pyd
        • Size 152KB
        • SHA256 bf63f44951f14c9d0c890415d013276498d6d59e53811bbe2fa16825710bea14
        • MD5 SHA1 SHA512 SSDEEP

        md.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\charset_normalizer\md.pyd
        • Size 10KB
        • SHA256 9b3d70922dcfaeb02812afa9030a40433b9d2b58bcf088781f9ab68a74d20664
        • MD5 SHA1 SHA512 SSDEEP

        md__mypyc.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\charset_normalizer\md__mypyc.pyd
        • Size 117KB
        • SHA256 ad9bcc0de6815516dfde91bb2e477f8fb5f099d7f5511d0f54b50fa77b721051
        • MD5 SHA1 SHA512 SSDEEP

        hex.exe

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\hex.exe
        • Size 11.0MB
        • SHA256 552e34c38a39d4d2dcf0db1bd20fa8b85723acbf157de6c91b046dfef1d10a88
        • MD5 SHA1 SHA512 SSDEEP

        libcrypto-1_1.dll

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\libcrypto-1_1.dll
        • Size 3.3MB
        • SHA256 664c3e52f914e351bb8a66ce2465ee0d40acab1d2a6b3167ae6acf6f1d1724d2
        • MD5 SHA1 SHA512 SSDEEP

        libffi-7.dll

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\libffi-7.dll
        • Size 32KB
        • SHA256 f60dd9f2fcbd495674dfc1555effb710eb081fc7d4cae5fa58c438ab50405081
        • MD5 SHA1 SHA512 SSDEEP

        python310.dll

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\python310.dll
        • Size 4.2MB
        • SHA256 f281c2e252ed59dd96726dbb2de529a2b07b818e9cc3799d1ffa9883e3028ed8
        • MD5 SHA1 SHA512 SSDEEP

        vcruntime140.dll

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_2176_133633606988747157\vcruntime140.dll
        • Size 94KB
        • SHA256 e1d6f78a72836ea120bd27a33ae89cbdc3f3ca7d9d0231aaa3aac91996d2fa4e
        • MD5 SHA1 SHA512 SSDEEP

        _tkinter.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\_tkinter.pyd
        • Size 60KB
        • SHA256 336bd5bffdc0229da4eaddbb0cfc42a9e55459a40e1322b38f7e563bda8dd190
        • MD5 SHA1 SHA512 SSDEEP

        nexusloader.exe

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\nexusloader.exe
        • Size 3.5MB
        • SHA256 fd0d14c5274d34a3ecbc6a71085af665663448555819fb6555983a8a7227e4b8
        • MD5 SHA1 SHA512 SSDEEP

        tcl86t.dll

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\tcl86t.dll
        • Size 1.8MB
        • SHA256 224476bedbcf121c69137f1df4dd025ae81769b2f7651bd3788a870a842cfbf9
        • MD5 SHA1 SHA512 SSDEEP

        msgcat-1.6.1.tm

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\tcl8\8.5\msgcat-1.6.1.tm
        • Size 33KB
        • SHA256 4fdf70fdcedef97aa8bd82a02669b066b5dfe7630c92494a130fc7c627b52b55
        • MD5 SHA1 SHA512 SSDEEP

        auto.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\tcl\auto.tcl
        • Size 20KB
        • SHA256 f385515658832feb75ee4dce5bd53f7f67f2629077b7d049b86a730a49bd0840
        • MD5 SHA1 SHA512 SSDEEP

        cp1252.enc

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\tcl\encoding\cp1252.enc
        • Size 1KB
        • SHA256 14df3ae30e81e7620be6bbb7a9e42083af1ae04d94cf1203565f8a3c0542ace0
        • MD5 SHA1 SHA512

        init.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\tcl\init.tcl
        • Size 23KB
        • SHA256 61c55633fa048deb120422daed84224f2bb12c7c94958ca6f679b219cf2fa939
        • MD5 SHA1 SHA512 SSDEEP

        tclIndex

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\tcl\tclIndex
        • Size 5KB
        • SHA256 962c60eb7e050061462ff72cec9741a7f18307af4aaa68d7665174f904842d13
        • MD5 SHA1 SHA512 SSDEEP

        tm.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\tcl\tm.tcl
        • Size 11KB
        • SHA256 6c02298d56e3c4c6b197afc79ec3ce1fc37ae176dc35f5d7ac48246f05f91669
        • MD5 SHA1 SHA512 SSDEEP

        tk.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\onefile_3332_133633607033434872\tk\tk.tcl
        • Size 23KB
        • SHA256 3e998b41ab23677db31902e1e876e644b279b2e6d8896443f6c434352801cdd1
        • MD5 SHA1 SHA512 SSDEEP

        dllhost.exe

        • Path C:\Users\Admin\dllhost.exe
        • Size 78KB
        • SHA256 34be6a934fd45752e788f9ba20943c8e52d91732d76e9f30a5176e98dccd956e
        • MD5 SHA1 SHA512 SSDEEP

        memory/1556-1124-0x000001CB02290000-0x000001CB022B2000-memory.dmp

        memory/3348-1112-0x0000000007240000-0x0000000007251000-memory.dmp

        memory/3348-1114-0x0000000007290000-0x00000000072A5000-memory.dmp

        memory/3348-1113-0x0000000007280000-0x000000000728E000-memory.dmp

        memory/3348-1098-0x0000000006CF0000-0x0000000006D24000-memory.dmp

        memory/3348-1111-0x00000000072C0000-0x0000000007356000-memory.dmp

        memory/3348-1110-0x00000000070C0000-0x00000000070CA000-memory.dmp

        memory/3348-1109-0x0000000006F30000-0x0000000006FD4000-memory.dmp

        memory/3348-1108-0x0000000006CB0000-0x0000000006CCE000-memory.dmp

        memory/3348-1099-0x0000000070A60000-0x0000000070AAC000-memory.dmp

        memory/3348-1115-0x0000000007380000-0x000000000739A000-memory.dmp

        memory/3348-1125-0x0000000007370000-0x0000000007378000-memory.dmp

        memory/4220-141-0x0000000000290000-0x00000000002AA000-memory.dmp

        memory/4860-39-0x0000000005A40000-0x0000000005D97000-memory.dmp

        memory/4860-90-0x0000000007510000-0x0000000007B8A000-memory.dmp

        memory/4860-6-0x0000000002A00000-0x0000000002A36000-memory.dmp

        memory/4860-10-0x0000000005100000-0x000000000572A000-memory.dmp

        memory/4860-9-0x0000000073450000-0x0000000073C01000-memory.dmp

        memory/4860-11-0x0000000073450000-0x0000000073C01000-memory.dmp

        memory/4860-12-0x0000000005040000-0x0000000005062000-memory.dmp

        memory/4860-14-0x0000000005890000-0x00000000058F6000-memory.dmp

        memory/4860-13-0x0000000005730000-0x0000000005796000-memory.dmp

        memory/4860-3-0x000000007345E000-0x000000007345F000-memory.dmp

        memory/4860-49-0x0000000005F10000-0x0000000005F5C000-memory.dmp

        memory/4860-48-0x0000000005EC0000-0x0000000005EDE000-memory.dmp

        memory/4860-93-0x00000000072B0000-0x0000000007342000-memory.dmp

        memory/4860-92-0x0000000008140000-0x00000000086E6000-memory.dmp

        memory/4860-91-0x00000000063F0000-0x000000000640A000-memory.dmp

        memory/4860-1162-0x000000007345E000-0x000000007345F000-memory.dmp

        memory/4860-1163-0x0000000073450000-0x0000000073C01000-memory.dmp