Analysis

  • max time kernel
    47s
  • max time network
    51s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    03-02-2023 19:20

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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 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 AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1116
    • 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:800
    • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      2⤵
        PID:1684

    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

    • memory/800-57-0x0000000000000000-mapping.dmp
    • memory/800-59-0x000000006FB00000-0x00000000700AB000-memory.dmp
      Filesize

      5.7MB

    • memory/800-60-0x000000006FB00000-0x00000000700AB000-memory.dmp
      Filesize

      5.7MB

    • memory/800-61-0x000000006FB00000-0x00000000700AB000-memory.dmp
      Filesize

      5.7MB

    • memory/1116-54-0x00000000001A0000-0x00000000001A8000-memory.dmp
      Filesize

      32KB

    • memory/1116-55-0x0000000076961000-0x0000000076963000-memory.dmp
      Filesize

      8KB

    • memory/1116-56-0x0000000007090000-0x000000000732E000-memory.dmp
      Filesize

      2.6MB

    • memory/1116-62-0x0000000005440000-0x00000000054C0000-memory.dmp
      Filesize

      512KB

    • memory/1684-63-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1684-64-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1684-66-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1684-68-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1684-69-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1684-70-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1684-71-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB

    • memory/1684-73-0x0000000000400000-0x0000000000480000-memory.dmp
      Filesize

      512KB