Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    04-06-2024 22:35

General

  • Target

    xtuHcaTJtwiA.exe

  • Size

    469KB

  • MD5

    fc489aa077f6db53303bcf8d0404528a

  • SHA1

    bfeace1de4d3ea72b231ea4d1ebe576bc4cdf2af

  • SHA256

    0e43af051e536e7c731f3d856baaf644e474c4c80ea22cb0fb4386d42c2e1056

  • SHA512

    a1c8a0c832b1e110a75e229a4f6f37c0e9682353de574e4dcc1a0312197f22dd074f3c8ab90a09ce685b06d231e1cf80c86283e7b129531617aa1eeba0b29fa1

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSDn9:uiLJbpI7I2WhQqZ7D9

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

pedrocachs.blogdns.com:1000

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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-OC07GB

  • 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

  • HawkEye

    HawkEye is a malware kit that has seen continuous development since at least 2013.

  • Remcos

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

  • Adds policy Run key to start application 2 TTPs 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 34 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\xtuHcaTJtwiA.exe
    "C:\Users\Admin\AppData\Local\Temp\xtuHcaTJtwiA.exe"
    1⤵
    • Adds policy Run key to start application
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1728
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1044
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2608
        • C:\ProgramData\Remcos\remcos.exe
          C:\ProgramData\Remcos\remcos.exe
          4⤵
          • Adds policy Run key to start application
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of WriteProcessMemory
          PID:2600
          • C:\Windows\SysWOW64\dxdiag.exe
            "C:\Windows\System32\dxdiag.exe" /t C:\Users\Admin\AppData\Local\Temp\sysinfo.txt
            5⤵
            • Drops file in Windows directory
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:2452

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\Remcos\remcos.exe

    Filesize

    469KB

    MD5

    fc489aa077f6db53303bcf8d0404528a

    SHA1

    bfeace1de4d3ea72b231ea4d1ebe576bc4cdf2af

    SHA256

    0e43af051e536e7c731f3d856baaf644e474c4c80ea22cb0fb4386d42c2e1056

    SHA512

    a1c8a0c832b1e110a75e229a4f6f37c0e9682353de574e4dcc1a0312197f22dd074f3c8ab90a09ce685b06d231e1cf80c86283e7b129531617aa1eeba0b29fa1

  • C:\Users\Admin\AppData\Local\Temp\install.vbs

    Filesize

    386B

    MD5

    1ec6289c6fd4c2ded6b2836ed28cbeb5

    SHA1

    c4e08195e6c640eb8860acc03fda1d649b4fe070

    SHA256

    6efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2

    SHA512

    20bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288

  • C:\Users\Admin\AppData\Local\Temp\sysinfo.txt

    Filesize

    15KB

    MD5

    e2e774cebfdd0e896b0f9a37066b434f

    SHA1

    b68a6662ed196e03f01c9805c6eb65c3cab22891

    SHA256

    e0b08f10fe765187e42967de81003628ddc5435cfb3c7f00dcba60c54dbdef19

    SHA512

    b5720651078cdc2e156bdd39dc45e568233ea001ba2a919c4ff7d2689a6543011382ac11cbe228c4aa5ea2b2253a9ff52230065d67f37dd39bef4b7ca82054ab

  • memory/2452-10-0x00000000003B0000-0x00000000003BA000-memory.dmp

    Filesize

    40KB

  • memory/2452-24-0x00000000003E0000-0x00000000003EA000-memory.dmp

    Filesize

    40KB

  • memory/2452-23-0x00000000003E0000-0x00000000003EA000-memory.dmp

    Filesize

    40KB

  • memory/2452-25-0x0000000000940000-0x000000000099C000-memory.dmp

    Filesize

    368KB

  • memory/2452-26-0x0000000000940000-0x000000000099C000-memory.dmp

    Filesize

    368KB

  • memory/2452-28-0x0000000000960000-0x000000000098A000-memory.dmp

    Filesize

    168KB

  • memory/2452-30-0x0000000000940000-0x0000000000942000-memory.dmp

    Filesize

    8KB

  • memory/2452-29-0x0000000000960000-0x000000000098A000-memory.dmp

    Filesize

    168KB