Resubmissions

06/01/2025, 12:11

250106-pcnm1swlfz

11/06/2024, 17:39

240611-v8d2cavepb10

Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/06/2024, 17:39

General

  • Target
    Nexus Release/Nexus Release V1.5.exe
  • Size 33.1MB
  • Sample240611-v8d2cavepb
  • SHA256 4763f3899de3f06d5598e165404dfb040d86961cb76c82fd153e9f8abff41712
  • 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.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 58 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).

  • Creates scheduled task(s) 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 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of WriteProcessMemory 24 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\Nexus Release\Nexus Release V1.5.exe
    "C:\Users\Admin\AppData\Local\Temp\Nexus Release\Nexus Release V1.5.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4988
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGcAcQBsACMAPgBBAGQAZAAtAFQAeQBwAGUAIAAtAEEAcwBzAGUAbQBiAGwAeQBOAGEAbQBlACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsAPAAjAGMAbABkACMAPgBbAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwAuAE0AZQBzAHMAYQBnAGUAQgBvAHgAXQA6ADoAUwBoAG8AdwAoACcALgBnAGcALwBuAGUAeAB1AHMAbABvAGEAZABlAHIAIABSAHUAbgAgAEEAcwAgAEEAZABtAGkAbgAgAEkAZgAgAEkAbgBqAGUAYwB0AGkAbwBuACAARgBhAGkAbABzACcALAAnACcALAAnAE8ASwAnACwAJwBXAGEAcgBuAGkAbgBnACcAKQA8ACMAdwBmAGMAIwA+AA=="
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1540
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGcAZABxACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGMAcwB6ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGMAbABpACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGcAegBlACMAPgA="
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1164
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:3720
      • C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\nexus.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3580
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "ver"
          4⤵
            PID:552
      • C:\Users\Admin\AppData\Local\dllhost.exe
        "C:\Users\Admin\AppData\Local\dllhost.exe"
        2⤵
        • Checks computer location settings
        • Drops startup file
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:876
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\dllhost.exe'
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1612
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'dllhost.exe'
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2336
        • 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'
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2924
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Runtime.exe'
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3448
        • 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"
          3⤵
          • Creates scheduled task(s)
          PID:2264
    • C:\ProgramData\Windows Runtime.exe
      "C:\ProgramData\Windows Runtime.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2948
    • C:\ProgramData\Windows Runtime.exe
      "C:\ProgramData\Windows Runtime.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4856

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          _ghash_portable.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\Crypto\Hash\_ghash_portable.pyd
          • Size 13KB
          • SHA256 8f3d92de840abb5a46015a8ff618ff411c73009cbaa448ac268a5c619cf84721
          • MD5 SHA1 SHA512 SSDEEP

          _bz2.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_bz2.pyd
          • Size 78KB
          • SHA256 4c2649dc69a8874b91646723aacb84c565efeaa4277c46392055bca9a10497a8
          • 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

          unicodedata.pyd

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

          __PSScriptPolicyTest_zwrplsc5.kwu.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zwrplsc5.kwu.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          _Salsa20.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Cipher\_Salsa20.pyd
          • Size 13KB
          • SHA256 15257e96d1ca8480b8cb98f4c79b6e365fe38a1ba9638fc8c9ab7ffea79c4762
          • MD5 SHA1 SHA512 SSDEEP

          _raw_cbc.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Cipher\_raw_cbc.pyd
          • Size 12KB
          • SHA256 11dd1b49f70db23617e84e08e709d4a9c86759d911a24ebddfb91c414cc7f375
          • MD5 SHA1 SHA512 SSDEEP

          _raw_cfb.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Cipher\_raw_cfb.pyd
          • Size 13KB
          • SHA256 faa41385d0db8d4ee2ee74ee540bc879cf2e884bee87655ff3c89c8c517eed45
          • MD5 SHA1 SHA512 SSDEEP

          _raw_ctr.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Cipher\_raw_ctr.pyd
          • Size 14KB
          • SHA256 61c7a532e108f67874ef2e17244358df19158f6142680f5b21032ba4889ac5d8
          • MD5 SHA1 SHA512 SSDEEP

          _raw_ecb.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Cipher\_raw_ecb.pyd
          • Size 10KB
          • SHA256 3e0d07bbf93e0748b42b1c2550f48f0d81597486038c22548224584ae178a543
          • MD5 SHA1 SHA512 SSDEEP

          _raw_ofb.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Cipher\_raw_ofb.pyd
          • Size 12KB
          • SHA256 c9f4c5ffcdd4f8814f8c07ce532a164ab699ae8cde737df02d6ecd7b5dd52dbd
          • MD5 SHA1 SHA512 SSDEEP

          _BLAKE2s.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Hash\_BLAKE2s.pyd
          • Size 14KB
          • SHA256 fc296145ae46a11c472f99c5be317e77c840c2430fbb955ce3f913408a046284
          • MD5 SHA1 SHA512 SSDEEP

          _SHA1.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Hash\_SHA1.pyd
          • Size 19KB
          • SHA256 a927548abea335e6bcb4a9ee0a949749c9e4aa8f8aad481cf63e3ac99b25a725
          • MD5 SHA1 SHA512 SSDEEP

          _SHA256.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Hash\_SHA256.pyd
          • Size 21KB
          • SHA256 3dbcb4d0070be355e0406e6b6c3e4ce58647f06e8650e1ab056e1d538b52b3d3
          • MD5 SHA1 SHA512 SSDEEP

          _ghash_clmul.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Hash\_ghash_clmul.pyd
          • Size 12KB
          • SHA256 e5b6e58d6da8db36b0673539f0c65c80b071a925d2246c42c54e9fcdd8ca08e3
          • MD5 SHA1 SHA512 SSDEEP

          _scrypt.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Protocol\_scrypt.pyd
          • Size 12KB
          • SHA256 b1bab0e04ac60d1e7917621b03a8c72d1ed1f0251334e9fa12a8a1ac1f516529
          • MD5 SHA1 SHA512 SSDEEP

          _cpuid_c.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Util\_cpuid_c.pyd
          • Size 10KB
          • SHA256 0828cad4d742d97888d3dfce59e82369317847651bba0f166023cb8aca790b2b
          • MD5 SHA1 SHA512 SSDEEP

          _strxor.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\Crypto\Util\_strxor.pyd
          • Size 10KB
          • SHA256 70d90ddf87a9608699be6bbedf89ad469632fd0adc20a69da07618596d443639
          • MD5 SHA1 SHA512 SSDEEP

          VCRUNTIME140.dll

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\VCRUNTIME140.dll
          • Size 94KB
          • SHA256 e1d6f78a72836ea120bd27a33ae89cbdc3f3ca7d9d0231aaa3aac91996d2fa4e
          • MD5 SHA1 SHA512 SSDEEP

          _cffi_backend.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\_cffi_backend.pyd
          • Size 177KB
          • SHA256 52e5a0c3ca9b0d4fc67243bd8492f5c305ff1653e8d956a2a3d9d36af0a3e4fd
          • MD5 SHA1 SHA512 SSDEEP

          _hashlib.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\_hashlib.pyd
          • Size 57KB
          • SHA256 50daeb3985302a8d85ce8167b0bf08b9da43e7d51ceae50e8e1cdfb0edf218c6
          • MD5 SHA1 SHA512 SSDEEP

          _lzma.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\_lzma.pyd
          • Size 149KB
          • SHA256 f125a885c10e1be4b12d988d6c19128890e7add75baa935fe1354721aa2dea3e
          • MD5 SHA1 SHA512 SSDEEP

          _queue.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\_queue.pyd
          • Size 26KB
          • SHA256 9ecec72c5fe3c83c122043cad8ceb80d239d99d03b8ea665490bbced183ce42a
          • MD5 SHA1 SHA512 SSDEEP

          _socket.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\_socket.pyd
          • Size 72KB
          • SHA256 3669e56e99ae3a944fbe7845f0be05aea96a603717e883d56a27dc356f8c2f2c
          • MD5 SHA1 SHA512 SSDEEP

          _ssl.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\_ssl.pyd
          • Size 152KB
          • SHA256 bf63f44951f14c9d0c890415d013276498d6d59e53811bbe2fa16825710bea14
          • MD5 SHA1 SHA512 SSDEEP

          md.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\charset_normalizer\md.pyd
          • Size 10KB
          • SHA256 9b3d70922dcfaeb02812afa9030a40433b9d2b58bcf088781f9ab68a74d20664
          • MD5 SHA1 SHA512 SSDEEP

          md__mypyc.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\charset_normalizer\md__mypyc.pyd
          • Size 117KB
          • SHA256 ad9bcc0de6815516dfde91bb2e477f8fb5f099d7f5511d0f54b50fa77b721051
          • MD5 SHA1 SHA512 SSDEEP

          libcrypto-1_1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\libcrypto-1_1.dll
          • Size 3.3MB
          • SHA256 664c3e52f914e351bb8a66ce2465ee0d40acab1d2a6b3167ae6acf6f1d1724d2
          • MD5 SHA1 SHA512 SSDEEP

          nexus.exe

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\nexus.exe
          • Size 37.0MB
          • SHA256 41f7a63a0f786d751c009fe4b06b7c8755a7aaaf82a252da6878e0a1b967608d
          • MD5 SHA1 SHA512 SSDEEP

          python310.dll

          • Path C:\Users\Admin\AppData\Local\Temp\onefile_3720_133626012097462060\python310.dll
          • Size 4.2MB
          • SHA256 f281c2e252ed59dd96726dbb2de529a2b07b818e9cc3799d1ffa9883e3028ed8
          • MD5 SHA1 SHA512 SSDEEP

          dllhost.exe

          • Path C:\Users\Admin\AppData\Local\dllhost.exe
          • Size 74KB
          • SHA256 49c175257966f191a2abce16d8533d359fc27ecf6512da870a9c59937914d5f7
          • MD5 SHA1 SHA512 SSDEEP

          svchost.exe

          • Path C:\Users\Admin\AppData\Roaming\svchost.exe
          • Size 33.0MB
          • SHA256 bad905acaa547a246c37c06b39f0d6f473489a6a1900245548a6341a87bb8a77
          • MD5 SHA1 SHA512 SSDEEP

          memory/876-47-0x0000000000CB0000-0x0000000000CC8000-memory.dmp

          memory/1164-884-0x00000000744C0000-0x000000007450C000-memory.dmp

          memory/1164-10-0x0000000073670000-0x0000000073E20000-memory.dmp

          memory/1164-1165-0x0000000073670000-0x0000000073E20000-memory.dmp

          memory/1164-1163-0x00000000076C0000-0x00000000076C8000-memory.dmp

          memory/1164-1094-0x0000000007580000-0x0000000007591000-memory.dmp

          memory/1164-1093-0x0000000007610000-0x00000000076A6000-memory.dmp

          memory/1164-3-0x00000000051F0000-0x0000000005818000-memory.dmp

          memory/1164-1092-0x00000000073F0000-0x00000000073FA000-memory.dmp

          memory/1164-1162-0x00000000076D0000-0x00000000076EA000-memory.dmp

          memory/1164-12-0x0000000073670000-0x0000000073E20000-memory.dmp

          memory/1164-1-0x0000000002A80000-0x0000000002AB6000-memory.dmp

          memory/1164-963-0x0000000007240000-0x00000000072E3000-memory.dmp

          memory/1164-1161-0x00000000075F0000-0x0000000007604000-memory.dmp

          memory/1164-907-0x0000000006630000-0x000000000664E000-memory.dmp

          memory/1164-864-0x0000000007000000-0x0000000007032000-memory.dmp

          memory/1164-1160-0x00000000075E0000-0x00000000075EE000-memory.dmp

          memory/1164-27-0x0000000005900000-0x0000000005966000-memory.dmp

          memory/1164-2-0x0000000073670000-0x0000000073E20000-memory.dmp

          memory/1164-34-0x0000000005A70000-0x0000000005DC4000-memory.dmp

          memory/1164-72-0x0000000006570000-0x00000000065BC000-memory.dmp

          memory/1540-25-0x0000000005AD0000-0x0000000005B36000-memory.dmp

          memory/1540-961-0x0000000008540000-0x0000000008AE4000-memory.dmp

          memory/1540-63-0x0000000006150000-0x000000000616E000-memory.dmp

          memory/1540-821-0x0000000006670000-0x000000000668A000-memory.dmp

          memory/1540-0-0x000000007367E000-0x000000007367F000-memory.dmp

          memory/1540-1159-0x0000000073670000-0x0000000073E20000-memory.dmp

          memory/1540-819-0x0000000007910000-0x0000000007F8A000-memory.dmp

          memory/1540-23-0x00000000050A0000-0x00000000050C2000-memory.dmp

          memory/1540-1007-0x0000000007520000-0x00000000075B2000-memory.dmp

          memory/1540-4-0x0000000073670000-0x0000000073E20000-memory.dmp

          memory/1540-11-0x0000000073670000-0x0000000073E20000-memory.dmp

          memory/1612-1172-0x00000156F90A0000-0x00000156F90C2000-memory.dmp

          memory/3580-1166-0x000002B430F70000-0x000002B4310EB000-memory.dmp

          memory/3580-1177-0x000002B430F70000-0x000002B4310EB000-memory.dmp