Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    03-02-2023 19:31

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 3 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 use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:832
    • 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:724
    • 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:1856
      • 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 behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:616
        • 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:1520
        • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          4⤵
          • Executes dropped EXE
          PID:1872
        • 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:1780

Network

MITRE ATT&CK Enterprise v6

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:\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

    efc74cd16896312b9f85f53da3f2fee2

    SHA1

    93500f4befd51597d11fd7e72d3ec8e9a6c5c2d4

    SHA256

    692cf64f3772573870ce569f0b537f06bd79da2ec3d09d8c28bd8a11898474de

    SHA512

    2e148bbf26d21282d313c78041f404ab56ca8bafbab0d0b105e553db13522f5aec2ad51700ca8db1177df5e98276b5ee5d03ac1ba58ceed7ec99a0f032eb7ff8

  • 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/616-85-0x00000000000C0000-0x00000000000C8000-memory.dmp
    Filesize

    32KB

  • memory/616-81-0x0000000000000000-mapping.dmp
  • memory/724-61-0x000000006FB70000-0x000000007011B000-memory.dmp
    Filesize

    5.7MB

  • memory/724-60-0x000000006FB70000-0x000000007011B000-memory.dmp
    Filesize

    5.7MB

  • memory/724-57-0x0000000000000000-mapping.dmp
  • memory/724-59-0x000000006FB70000-0x000000007011B000-memory.dmp
    Filesize

    5.7MB

  • memory/832-55-0x0000000076BA1000-0x0000000076BA3000-memory.dmp
    Filesize

    8KB

  • memory/832-54-0x00000000001D0000-0x00000000001D8000-memory.dmp
    Filesize

    32KB

  • memory/832-56-0x00000000072E0000-0x000000000757E000-memory.dmp
    Filesize

    2.6MB

  • memory/832-62-0x0000000004F70000-0x0000000004FF0000-memory.dmp
    Filesize

    512KB

  • memory/1520-87-0x0000000000000000-mapping.dmp
  • memory/1520-90-0x000000006FB00000-0x00000000700AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1520-91-0x000000006FB00000-0x00000000700AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1520-92-0x000000006FB00000-0x00000000700AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1780-113-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1780-114-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1780-108-0x0000000000432E48-mapping.dmp
  • memory/1780-112-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-64-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-83-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-79-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-76-0x0000000000432E48-mapping.dmp
  • memory/1856-75-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-73-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-71-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-70-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-69-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-68-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-66-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/1856-63-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB