Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 01:28

General

  • Target

    FDA_CERT.exe

  • Size

    371KB

  • MD5

    9c547767c3059a4aa991b4b4413725bb

  • SHA1

    fd83c2cf73a959255d01abca9d681af4c62d5dbf

  • SHA256

    246fb765947ed62ef616f5f714642ff0db639983582c0fa2cbab9ad251669b78

  • SHA512

    1a3e2250804bc524750cdf3517b51af04e6988bc080a2d35468fc2e16758b6cd8970ff416ce0a009cbda387b31aaa0e698e8e5d1aba3f60c6110e069e4c1b1b7

Score
10/10

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

kmt.duckdns.org:3039

kmt-2.duckdns.org:3039

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_vejtzxohypibcpz

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

Signatures

  • Remcos

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FDA_CERT.exe
    "C:\Users\Admin\AppData\Local\Temp\FDA_CERT.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1900
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HXAjzs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp23B7.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:836
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
      "{path}"
      2⤵
        PID:568

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp23B7.tmp
      Filesize

      1KB

      MD5

      64b84d558f2513df22c5d9d2e1999121

      SHA1

      2d38ab08ec3e97d1f3a5439f25293daeff7cdc64

      SHA256

      11dd7830034cbba2928401b42a50e6cead6cad114aca337bfb88e456ec60a01a

      SHA512

      8cac1092d788a7aed6a0e1e0a425e15179b727a91838da66532568ae26395400b81bdf8a96924e949266e9404a02074c1fd5a8eda43cb6e38a746a7c5995b5a6

    • memory/568-60-0x0000000000400000-0x0000000000417000-memory.dmp
      Filesize

      92KB

    • memory/568-59-0x0000000000400000-0x0000000000417000-memory.dmp
      Filesize

      92KB

    • memory/568-62-0x0000000000400000-0x0000000000417000-memory.dmp
      Filesize

      92KB

    • memory/568-65-0x0000000000400000-0x0000000000417000-memory.dmp
      Filesize

      92KB

    • memory/568-64-0x0000000000400000-0x0000000000417000-memory.dmp
      Filesize

      92KB

    • memory/568-66-0x0000000000400000-0x0000000000417000-memory.dmp
      Filesize

      92KB

    • memory/568-67-0x000000000040FD88-mapping.dmp
    • memory/568-70-0x0000000000400000-0x0000000000417000-memory.dmp
      Filesize

      92KB

    • memory/568-71-0x0000000000400000-0x0000000000417000-memory.dmp
      Filesize

      92KB

    • memory/836-56-0x0000000000000000-mapping.dmp
    • memory/1900-55-0x0000000074B90000-0x000000007513B000-memory.dmp
      Filesize

      5.7MB

    • memory/1900-58-0x0000000000B39000-0x0000000000B4A000-memory.dmp
      Filesize

      68KB

    • memory/1900-54-0x0000000076011000-0x0000000076013000-memory.dmp
      Filesize

      8KB