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Resubmissions

19/12/2022, 02:20

221219-csrcmaea94 10

15/12/2022, 08:58

221215-kw59ysfa7s 10

Analysis

  • max time kernel
    147s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/12/2022, 08:58

General

  • Target

    Payments copy.exe

  • Size

    1.1MB

  • MD5

    515304eb9aef3694b0960c9037740017

  • SHA1

    acf2f7ab8ebc60957028b7799c5329639ed7aa8d

  • SHA256

    4583b002fce0501faad20dd27af109b8a57288004190c501b20ad1e645dd8610

  • SHA512

    50ba8b5578770be0cad1099bbd44b62dc62c2987f368db65a929e8d7f4fde19c4e0bbf30e815f60f4bf190c5ac0f62d77544cfe15bb3055e36458f9405ac0b6b

  • SSDEEP

    24576:qi3uqj3R7WQ7G++bjPAhXk/QDw8HkF3dg:l+KRWQobjukMEF

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost Reff

C2

185.136.161.189:1960

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-IPL25E

  • 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

  • Remcos

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Payments copy.exe
    "C:\Users\Admin\AppData\Local\Temp\Payments copy.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2492
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\UcfJDBBf.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1012
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UcfJDBBf" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFEC7.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4388
    • C:\Users\Admin\AppData\Local\Temp\Payments copy.exe
      "C:\Users\Admin\AppData\Local\Temp\Payments copy.exe"
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:2992

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpFEC7.tmp

    Filesize

    1KB

    MD5

    8513e5a8e48de5379da359b5a88a42d2

    SHA1

    97d4f43aad61c09914a9b3b497562ea84ed70e85

    SHA256

    51d884529a737321658c85bb1c61026f2864dfbb4ba7b2fe9c0f477d48340436

    SHA512

    f32d951845f0a3c1c3ef4c77382e96edbb19a5b53a48402a545974d253f0f2c02abf60576662bef9188ef456df9d5467a7de05e12ee8bf735d6e7be9a0524c94

  • memory/1012-153-0x00000000073E0000-0x00000000073FE000-memory.dmp

    Filesize

    120KB

  • memory/1012-152-0x0000000070910000-0x000000007095C000-memory.dmp

    Filesize

    304KB

  • memory/1012-160-0x0000000007B10000-0x0000000007B18000-memory.dmp

    Filesize

    32KB

  • memory/1012-159-0x0000000007B30000-0x0000000007B4A000-memory.dmp

    Filesize

    104KB

  • memory/1012-158-0x0000000007A20000-0x0000000007A2E000-memory.dmp

    Filesize

    56KB

  • memory/1012-139-0x0000000002B40000-0x0000000002B76000-memory.dmp

    Filesize

    216KB

  • memory/1012-157-0x0000000007A70000-0x0000000007B06000-memory.dmp

    Filesize

    600KB

  • memory/1012-141-0x0000000005550000-0x0000000005B78000-memory.dmp

    Filesize

    6.2MB

  • memory/1012-156-0x0000000007860000-0x000000000786A000-memory.dmp

    Filesize

    40KB

  • memory/1012-155-0x00000000077F0000-0x000000000780A000-memory.dmp

    Filesize

    104KB

  • memory/1012-145-0x00000000053A0000-0x00000000053C2000-memory.dmp

    Filesize

    136KB

  • memory/1012-154-0x0000000007E40000-0x00000000084BA000-memory.dmp

    Filesize

    6.5MB

  • memory/1012-148-0x0000000005E50000-0x0000000005EB6000-memory.dmp

    Filesize

    408KB

  • memory/1012-151-0x0000000007420000-0x0000000007452000-memory.dmp

    Filesize

    200KB

  • memory/1012-150-0x0000000006470000-0x000000000648E000-memory.dmp

    Filesize

    120KB

  • memory/1012-146-0x0000000005D70000-0x0000000005DD6000-memory.dmp

    Filesize

    408KB

  • memory/2492-134-0x0000000005840000-0x00000000058D2000-memory.dmp

    Filesize

    584KB

  • memory/2492-132-0x0000000000E50000-0x0000000000F6E000-memory.dmp

    Filesize

    1.1MB

  • memory/2492-133-0x0000000005D50000-0x00000000062F4000-memory.dmp

    Filesize

    5.6MB

  • memory/2492-136-0x0000000008330000-0x00000000083CC000-memory.dmp

    Filesize

    624KB

  • memory/2492-135-0x00000000057C0000-0x00000000057CA000-memory.dmp

    Filesize

    40KB

  • memory/2992-149-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2992-147-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2992-144-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2992-143-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/2992-161-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB