Analysis

  • max time kernel
    236s
  • max time network
    310s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    03-02-2023 19:03

General

  • Target

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe

  • Size

    7KB

  • MD5

    b359f4af5c88b1e237db9738415b7682

  • SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

  • SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

  • SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • SSDEEP

    96:xtEsKVeCVIP7bLp8LAn5c8aY1ej/kKV+J2qzNt:xUVVIP7bLrEOejcKYx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

194.180.49.17:28282

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    rdfghfgjkgoighjc.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-PC1DJ2

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Detect PureCrypter injector 1 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 10 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
    "C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:592
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1920
    • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      2⤵
        PID:1652
      • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
        C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
        2⤵
        • Loads dropped DLL
        • Adds Run key to start application
        • Suspicious use of WriteProcessMemory
        PID:436
        • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          "C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe"
          3⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1152
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1940
          • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
            C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
            4⤵
            • Executes dropped EXE
            • Adds Run key to start application
            • Suspicious use of SetWindowsHookEx
            PID:1592

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      Filesize

      7KB

      MD5

      b359f4af5c88b1e237db9738415b7682

      SHA1

      d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

      SHA256

      53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

      SHA512

      6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

    • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      Filesize

      7KB

      MD5

      b359f4af5c88b1e237db9738415b7682

      SHA1

      d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

      SHA256

      53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

      SHA512

      6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

    • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      Filesize

      7KB

      MD5

      b359f4af5c88b1e237db9738415b7682

      SHA1

      d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

      SHA256

      53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

      SHA512

      6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
      Filesize

      7KB

      MD5

      2bd630ff6604fa4daed8f9b3873c67da

      SHA1

      f0f100bd47a1393747904d8e3359beb771f46a64

      SHA256

      5bb7eac75501263bfc392b12fbdde4638c95697de5685b95e2c0b0243231795a

      SHA512

      f512d3f14fe6bce3cd8d52049107f6a5e9488b00d53ed626764b58e95b88b3349fbcb4a8402a1686c20ff7f21ca0a8f7259c0407b23ea281e7827223a5fec0d1

    • C:\Users\Admin\AppData\Roaming\Zwpfblvosjv\Phecxlkxbf.exe
      Filesize

      7KB

      MD5

      b359f4af5c88b1e237db9738415b7682

      SHA1

      d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

      SHA256

      53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

      SHA512

      6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

    • \ProgramData\Remcos\rdfghfgjkgoighjc.exe
      Filesize

      7KB

      MD5

      b359f4af5c88b1e237db9738415b7682

      SHA1

      d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

      SHA256

      53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

      SHA512

      6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

    • memory/436-64-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-73-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-63-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-80-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-66-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-68-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-69-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-70-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-71-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-84-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-75-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/436-76-0x0000000000432E48-mapping.dmp
    • memory/436-79-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/592-54-0x0000000000150000-0x0000000000158000-memory.dmp
      Filesize

      32KB

    • memory/592-55-0x0000000075D11000-0x0000000075D13000-memory.dmp
      Filesize

      8KB

    • memory/592-62-0x0000000004EB0000-0x0000000004F30000-memory.dmp
      Filesize

      512KB

    • memory/592-56-0x0000000007660000-0x00000000078FE000-memory.dmp
      Filesize

      2.6MB

    • memory/1152-82-0x0000000000000000-mapping.dmp
    • memory/1152-86-0x0000000000A40000-0x0000000000A48000-memory.dmp
      Filesize

      32KB

    • memory/1592-108-0x0000000000432E48-mapping.dmp
    • memory/1592-112-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1592-113-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1920-59-0x000000006EC50000-0x000000006F1FB000-memory.dmp
      Filesize

      5.7MB

    • memory/1920-57-0x0000000000000000-mapping.dmp
    • memory/1920-60-0x000000006EC50000-0x000000006F1FB000-memory.dmp
      Filesize

      5.7MB

    • memory/1920-61-0x000000006EC50000-0x000000006F1FB000-memory.dmp
      Filesize

      5.7MB

    • memory/1940-88-0x0000000000000000-mapping.dmp
    • memory/1940-91-0x000000006F0E0000-0x000000006F68B000-memory.dmp
      Filesize

      5.7MB

    • memory/1940-92-0x000000006F0E0000-0x000000006F68B000-memory.dmp
      Filesize

      5.7MB

    • memory/1940-93-0x000000006F0E0000-0x000000006F68B000-memory.dmp
      Filesize

      5.7MB