Analysis

  • max time kernel
    154s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    03-02-2023 18:52

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 4 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:1192
    • 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:1788
    • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      2⤵
        PID:1040
      • 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:772
        • 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:1252
          • 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:1036
          • 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:1428

    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

      1eabcbc26d0b6b63078d0d39dc203733

      SHA1

      7ee1a2438d613b2ea0e2dfc028815611a8aab50a

      SHA256

      58699916131355efd751c65d9315a8874609aefef4eccd59a7eb9eb3d93fcf4f

      SHA512

      adb3875717b0b974561bb59ca7e3976aa597653f19f2d6e5c69886dc3c8a397aba3bc6f874600b70eea242e8150016017cea1dc7c570b5d3ed65da2fcf096a01

    • 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/772-64-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-81-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-63-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-84-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-66-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-68-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-69-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-70-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-71-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-73-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-76-0x0000000000432E48-mapping.dmp
    • memory/772-75-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/772-79-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1036-91-0x000000006F180000-0x000000006F72B000-memory.dmp
      Filesize

      5.7MB

    • memory/1036-88-0x0000000000000000-mapping.dmp
    • memory/1036-93-0x000000006F180000-0x000000006F72B000-memory.dmp
      Filesize

      5.7MB

    • memory/1036-92-0x000000006F180000-0x000000006F72B000-memory.dmp
      Filesize

      5.7MB

    • memory/1192-62-0x0000000004E80000-0x0000000004F00000-memory.dmp
      Filesize

      512KB

    • memory/1192-54-0x0000000000200000-0x0000000000208000-memory.dmp
      Filesize

      32KB

    • memory/1192-55-0x0000000075591000-0x0000000075593000-memory.dmp
      Filesize

      8KB

    • memory/1192-56-0x00000000071D0000-0x000000000746E000-memory.dmp
      Filesize

      2.6MB

    • memory/1252-82-0x0000000000000000-mapping.dmp
    • memory/1252-86-0x0000000001210000-0x0000000001218000-memory.dmp
      Filesize

      32KB

    • memory/1428-108-0x0000000000432E48-mapping.dmp
    • memory/1428-112-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1428-113-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1428-114-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1788-61-0x000000006F1F0000-0x000000006F79B000-memory.dmp
      Filesize

      5.7MB

    • memory/1788-60-0x000000006F1F0000-0x000000006F79B000-memory.dmp
      Filesize

      5.7MB

    • memory/1788-57-0x0000000000000000-mapping.dmp
    • memory/1788-59-0x000000006F1F0000-0x000000006F79B000-memory.dmp
      Filesize

      5.7MB