Resubmissions

16/09/2025, 13:36

250916-qwdslawtat10

16/09/2025, 13:36

250916-qwdsladj6s

10/11/2024, 03:46

241110-eby29asjhr10

Analysis

  • max time kernel
    94s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/11/2024, 03:46

General

  • Target
    Curd.exe
  • Size 7.5MB
  • Sample241110-eby29asjhr
  • SHA256 b406c1acec618c85ce1990fb931342aff9c5173b862b4a828b61cb89c24aa0c3
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detect Neshta payload 5 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Neshta family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 16 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • 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 processes with tasklist 1 TTPs 1 IoCs
  • UPX packed file 47 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

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

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Curd.exe
    "C:\Users\Admin\AppData\Local\Temp\Curd.exe"
    1⤵
    • Checks computer location settings
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1744
    • C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4388
      • C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe
        "C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1464
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "powershell -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe'"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4728
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3108
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "powershell Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2 & "%ProgramFiles%\Windows Defender\MpCmdRun.exe" -RemoveDefinitions -All"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3532
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1304
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "tasklist /FO LIST"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4608
          • C:\Windows\system32\tasklist.exe
            tasklist /FO LIST
            5⤵
            • Enumerates processes with tasklist
            • Suspicious use of AdjustPrivilegeToken
            PID:1388
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "wmic csproduct get uuid"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1496
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic csproduct get uuid
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4072

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        ACROTE~1.EXE

        • Path C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE
        • Size 86KB
        • SHA256 ded54d1fcca07b6bff2bc3b9a1131eac29ff1f836e5d7a7c5c325ec5abe96e29
        • MD5 SHA1 SHA512 SSDEEP

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 2KB
        • SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233
        • MD5 SHA1 SHA512

        Curd.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\Curd.exe
        • Size 7.4MB
        • SHA256 2b7de15c6cae1857df6089ab71448aa8f062df85943e820b220f483137283cb1
        • MD5 SHA1 SHA512 SSDEEP

        VCRUNTIME140.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\VCRUNTIME140.dll
        • Size 106KB
        • SHA256 69320f278d90efaaeb67e2a1b55e5b0543883125834c812c8d9c39676e0494fc
        • MD5 SHA1 SHA512 SSDEEP

        _bz2.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\_bz2.pyd
        • Size 48KB
        • SHA256 17bfa656cabf7ef75741003497a1c315b10237805ff171d44625a04c16532293
        • MD5 SHA1 SHA512 SSDEEP

        _ctypes.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\_ctypes.pyd
        • Size 58KB
        • SHA256 9ffadcb2c40ae6b67ab611acc09e050bbe544672cf05e8402a7aa3936326de1f
        • MD5 SHA1 SHA512 SSDEEP

        _hashlib.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\_hashlib.pyd
        • Size 35KB
        • SHA256 d42c3550e58b9aa34d58f709dc65dc4ee6eea83b651740822e10b0aa051df1d7
        • MD5 SHA1 SHA512 SSDEEP

        _lzma.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\_lzma.pyd
        • Size 85KB
        • SHA256 d2a7111feeaacac8b3a71727482565c46141cc7a5a3d837d8349166bea5054c9
        • MD5 SHA1 SHA512 SSDEEP

        _queue.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\_queue.pyd
        • Size 25KB
        • SHA256 e71803913b57c49f4ce3416ec15dc8a9e5c14f8675209624e76cd71b0319b192
        • MD5 SHA1 SHA512 SSDEEP

        _socket.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\_socket.pyd
        • Size 43KB
        • SHA256 dc03d32f681634e682b02e9a60fdfce420db9f26754aefb9a58654a064dc0f9f
        • MD5 SHA1 SHA512 SSDEEP

        _sqlite3.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\_sqlite3.pyd
        • Size 56KB
        • SHA256 8e4b9da9c95915e864c89856e2d7671cd888028578a623e761aeac2feca04882
        • MD5 SHA1 SHA512 SSDEEP

        _ssl.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\_ssl.pyd
        • Size 65KB
        • SHA256 b093aa2e84a30790abeee82cf32a7c2209978d862451f1e0b0786c4d22833cb6
        • MD5 SHA1 SHA512 SSDEEP

        base_library.zip

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\base_library.zip
        • Size 1.8MB
        • SHA256 734e277712e823fca86ca75bf5d4f85a21893208e683c4ab407be10c3b9052dc
        • MD5 SHA1 SHA512 SSDEEP

        blank.aes

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\blank.aes
        • Size 117KB
        • SHA256 06154cf16b18d32a02c7afc13582a36460ddafefd54e9aae6b69054b1bdd36b2
        • MD5 SHA1 SHA512 SSDEEP

        blank.aes

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\blank.aes
        • Size 117KB
        • SHA256 003b8496709aaca66b9b9920cb7756def707674a07c2a0987f5ce47ee0d3da4e
        • MD5 SHA1 SHA512 SSDEEP

        libcrypto-3.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\libcrypto-3.dll
        • Size 1.6MB
        • SHA256 6a8c458e3d96f8dd3bf6d3cacc035e38edf7f127eee5563b51f8c8790ced0b3e
        • MD5 SHA1 SHA512 SSDEEP

        libffi-8.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\libffi-8.dll
        • Size 29KB
        • SHA256 135c772b42ba6353757a4d076ce03dbf792456143b42d25a62066da46144fece
        • MD5 SHA1 SHA512 SSDEEP

        libssl-3.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\libssl-3.dll
        • Size 223KB
        • SHA256 827fdb184fdcde9223d09274be780fe4fe8518c15c8fc217748ad5fd5ea0f147
        • MD5 SHA1 SHA512 SSDEEP

        python311.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\python311.dll
        • Size 1.6MB
        • SHA256 ff9f102264d1944fbfae2ba70e7a71435f51a3e8c677fd970b621c4c9ea71967
        • MD5 SHA1 SHA512 SSDEEP

        select.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\select.pyd
        • Size 25KB
        • SHA256 2d15c2f311528440aa29934920fb0b015eaf8cbe3b3c9ad08a282a2d6ba68876
        • MD5 SHA1 SHA512 SSDEEP

        sqlite3.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\sqlite3.dll
        • Size 622KB
        • SHA256 6e6b6f7df961c119692f6c1810fbfb7d40219ea4e5b2a98c413424cf02dce16c
        • MD5 SHA1 SHA512 SSDEEP

        unicodedata.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI43882\unicodedata.pyd
        • Size 295KB
        • SHA256 0e00b0e896457ecdc6ef85a8989888ccfbf05ebd8d8a1c493946a2f224b880c2
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_lxx5pqxf.meq.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lxx5pqxf.meq.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        memory/1464-170-0x00007FFFB2FE0000-0x00007FFFB2FED000-memory.dmp

        memory/1464-201-0x00007FFFB30B0000-0x00007FFFB30BD000-memory.dmp

        memory/1464-149-0x00007FFFAEAE0000-0x00007FFFAF0C9000-memory.dmp

        memory/1464-150-0x00007FFFB0520000-0x00007FFFB0553000-memory.dmp

        memory/1464-151-0x00007FFFADC10000-0x00007FFFADCDD000-memory.dmp

        memory/1464-153-0x00007FFFB4090000-0x00007FFFB40B3000-memory.dmp

        memory/1464-168-0x00007FFFB2A50000-0x00007FFFB2A64000-memory.dmp

        memory/1464-152-0x00007FFFA3A30000-0x00007FFFA3F50000-memory.dmp

        memory/1464-133-0x00007FFFA3F50000-0x00007FFFA40C7000-memory.dmp

        memory/1464-140-0x00007FFFB30B0000-0x00007FFFB30BD000-memory.dmp

        memory/1464-127-0x00007FFFB30E0000-0x00007FFFB30F9000-memory.dmp

        memory/1464-124-0x00007FFFB3050000-0x00007FFFB307D000-memory.dmp

        memory/1464-173-0x00007FFFA3910000-0x00007FFFA3A2C000-memory.dmp

        memory/1464-40-0x00007FFFAEAE0000-0x00007FFFAF0C9000-memory.dmp

        memory/1464-132-0x00007FFFB2A70000-0x00007FFFB2A93000-memory.dmp

        memory/1464-193-0x00007FFFAEAE0000-0x00007FFFAF0C9000-memory.dmp

        memory/1464-204-0x00007FFFADC10000-0x00007FFFADCDD000-memory.dmp

        memory/1464-203-0x00007FFFA3A30000-0x00007FFFA3F50000-memory.dmp

        memory/1464-202-0x00007FFFB0520000-0x00007FFFB0553000-memory.dmp

        memory/1464-139-0x00007FFFB3030000-0x00007FFFB3049000-memory.dmp

        memory/1464-200-0x00007FFFB3030000-0x00007FFFB3049000-memory.dmp

        memory/1464-199-0x00007FFFA3F50000-0x00007FFFA40C7000-memory.dmp

        memory/1464-198-0x00007FFFB2A70000-0x00007FFFB2A93000-memory.dmp

        memory/1464-197-0x00007FFFB30E0000-0x00007FFFB30F9000-memory.dmp

        memory/1464-196-0x00007FFFB3050000-0x00007FFFB307D000-memory.dmp

        memory/1464-195-0x00007FFFB4260000-0x00007FFFB426F000-memory.dmp

        memory/1464-194-0x00007FFFB4090000-0x00007FFFB40B3000-memory.dmp

        memory/1464-46-0x00007FFFB4090000-0x00007FFFB40B3000-memory.dmp

        memory/1464-47-0x00007FFFB4260000-0x00007FFFB426F000-memory.dmp

        memory/1464-212-0x00007FFFA3910000-0x00007FFFA3A2C000-memory.dmp

        memory/1464-211-0x00007FFFB2FE0000-0x00007FFFB2FED000-memory.dmp

        memory/1464-210-0x00007FFFB2A50000-0x00007FFFB2A64000-memory.dmp

        memory/1744-217-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/1744-218-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/1744-219-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/1744-221-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/3108-183-0x0000018B6FD90000-0x0000018B6FDB2000-memory.dmp