General

  • Target

    71dc9593413d17bc6d72619104a202b94afb37af37130796c853ebc31fca0c7b

  • Size

    942KB

  • Sample

    241121-d9k3lsxhmf

  • MD5

    d693129bcfa4ee6947ebee47d9a220c0

  • SHA1

    d4848019b810ce320d49388327351cc79dd69e3c

  • SHA256

    71dc9593413d17bc6d72619104a202b94afb37af37130796c853ebc31fca0c7b

  • SHA512

    c5ca275d096cfeb0af59e5cd33daf00f037a73f83d8b551a88cba814f7dceefdb42216c95b3fd064ff7880a4915f3f9434ac7a5640840c41460ba04e10d18da8

  • SSDEEP

    24576:XAbXe4vkwxxdQHzB2cuGEQo3GQPx212rWaLL:n4dPdQHzgcuGE/3xxpZL

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

212.162.149.226:9285

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    AppUpdate

  • 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-VCJ8ZS

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    AppUpdate

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      Bank Fund Transfer-589237.scr

    • Size

      1.2MB

    • MD5

      552044ce92b78bf4b68d242c2c380afe

    • SHA1

      2ef4efa20f4fd0d05d8f49ccb22c9afeada93a62

    • SHA256

      cac29565b48f92e8c7a43b7dcca13294bae02890c26df75ae5e5ee31a464e4f3

    • SHA512

      4dc5ef0fb4b80a81015f4507422a67309074ea01787c9ed0d18c850a1d98ea1e3a444993a1d08428331e2ff044390c873d20c31ffbae049e325a82b64d5a3967

    • SSDEEP

      24576:6YdgfvzmIzxWOwxzCJYC3PPoKb0Eci5ihjJVxw9bYOd+8:qzmmWXRCaePPjb0Eci5ih7xw9bYI

    • Remcos

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

    • Remcos family

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks