Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-04-2024 09:54

General

  • Target

    1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe

  • Size

    531KB

  • MD5

    1892b02189311ec4eaa6fe27df2ff812

  • SHA1

    d307df371319b316a3b1f70d62dfcaaf2d201dfd

  • SHA256

    1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd

  • SHA512

    12d9890ffb6d35d2703bed448cf83bd08bac348bb3a20afda6e971190c7ddfc7fed5ff9a50d363bbb75ac369235e1e569a738a1d44ff8024937f6b04e449de28

  • SSDEEP

    12288:lPdrsWz1gSPZirKzM2WZP3IJvpNoBKupPJgJWp:llhRxiIW13TV8

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

79.134.225.7:2050

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • 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

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Remcos-TTGDBF

  • 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

  • take_screenshot_title

    notepad;solitaire;

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.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
    "C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2348
    • C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
      C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
      2⤵
        PID:2428
      • C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
        C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
        2⤵
          PID:1340
        • C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
          C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
          2⤵
            PID:1860
          • C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
            C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
            2⤵
            • Checks computer location settings
            • Adds Run key to start application
            • Modifies registry class
            • Suspicious use of WriteProcessMemory
            PID:2448
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
              3⤵
              • Checks computer location settings
              • Suspicious use of WriteProcessMemory
              PID:888
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:1044
                • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                  C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                  5⤵
                  • Executes dropped EXE
                  • Adds Run key to start application
                  • Suspicious use of SetThreadContext
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:892
                  • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                    C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
                    6⤵
                    • Executes dropped EXE
                    • Adds Run key to start application
                    PID:2856

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          418B

          MD5

          b92d64fe5b1d1f59df4b738262aea8df

          SHA1

          c8fb1981759c2d9bb2ec91b705985fba5fc7af63

          SHA256

          fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

          SHA512

          2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

        • C:\Users\Admin\AppData\Local\huss.exe

          MD5

          d41d8cd98f00b204e9800998ecf8427e

          SHA1

          da39a3ee5e6b4b0d3255bfef95601890afd80709

          SHA256

          e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

          SHA512

          cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

        • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe

          Filesize

          531KB

          MD5

          1892b02189311ec4eaa6fe27df2ff812

          SHA1

          d307df371319b316a3b1f70d62dfcaaf2d201dfd

          SHA256

          1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd

          SHA512

          12d9890ffb6d35d2703bed448cf83bd08bac348bb3a20afda6e971190c7ddfc7fed5ff9a50d363bbb75ac369235e1e569a738a1d44ff8024937f6b04e449de28

        • memory/892-39-0x00000000747A0000-0x0000000074F50000-memory.dmp

          Filesize

          7.7MB

        • memory/892-32-0x0000000000C90000-0x0000000000CA0000-memory.dmp

          Filesize

          64KB

        • memory/892-31-0x00000000747A0000-0x0000000074F50000-memory.dmp

          Filesize

          7.7MB

        • memory/892-30-0x0000000000C90000-0x0000000000CA0000-memory.dmp

          Filesize

          64KB

        • memory/892-29-0x00000000747A0000-0x0000000074F50000-memory.dmp

          Filesize

          7.7MB

        • memory/2348-12-0x0000000005CB0000-0x0000000005D16000-memory.dmp

          Filesize

          408KB

        • memory/2348-0-0x0000000000810000-0x000000000089A000-memory.dmp

          Filesize

          552KB

        • memory/2348-10-0x00000000747A0000-0x0000000074F50000-memory.dmp

          Filesize

          7.7MB

        • memory/2348-11-0x00000000052A0000-0x00000000052B0000-memory.dmp

          Filesize

          64KB

        • memory/2348-8-0x0000000005FE0000-0x000000000604A000-memory.dmp

          Filesize

          424KB

        • memory/2348-9-0x0000000006120000-0x000000000616C000-memory.dmp

          Filesize

          304KB

        • memory/2348-17-0x00000000747A0000-0x0000000074F50000-memory.dmp

          Filesize

          7.7MB

        • memory/2348-4-0x0000000005F20000-0x0000000005FD2000-memory.dmp

          Filesize

          712KB

        • memory/2348-1-0x00000000747A0000-0x0000000074F50000-memory.dmp

          Filesize

          7.7MB

        • memory/2348-2-0x00000000052A0000-0x00000000052B0000-memory.dmp

          Filesize

          64KB

        • memory/2348-3-0x0000000005DE0000-0x0000000005E64000-memory.dmp

          Filesize

          528KB

        • memory/2348-7-0x0000000006080000-0x0000000006112000-memory.dmp

          Filesize

          584KB

        • memory/2348-6-0x0000000006590000-0x0000000006B34000-memory.dmp

          Filesize

          5.6MB

        • memory/2348-5-0x0000000005EB0000-0x0000000005F00000-memory.dmp

          Filesize

          320KB

        • memory/2448-14-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2448-24-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2448-21-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2448-18-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2448-16-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-40-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-54-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-41-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-42-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-43-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-44-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-45-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-46-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-47-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-48-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-49-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-50-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-51-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-52-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-53-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-38-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-55-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-56-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-57-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-58-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-59-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-60-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-61-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-62-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-63-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-64-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-65-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-66-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB

        • memory/2856-67-0x0000000000400000-0x000000000047A000-memory.dmp

          Filesize

          488KB