Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    24-10-2022 06:24

General

  • Target

    SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe

  • Size

    1.3MB

  • MD5

    11f7f0b849c355b95c7b127880ecf903

  • SHA1

    ceae025a4bf73868f960fde6171595fcef86a8f7

  • SHA256

    42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

  • SHA512

    215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

  • SSDEEP

    24576:7fLWywQrYnpHJgvs6uQOxKsMJK/ArsF6C87wau9Iibt/DxX2ZyrzTzL7:7fLjjrY/Y/KIIX87wau9Tbt/8yHT

Malware Config

Extracted

Family

remcos

Botnet

XP

C2

xpremcuz300622.ddns.net:3542

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    oos.exe

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Remcos-MMP2I7

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    kkl

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1448
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
      "{path}"
      2⤵
        PID:1244
      • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
        "{path}"
        2⤵
          PID:1180
        • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Troj.MSIL-SSP.21940.20303.exe
          "{path}"
          2⤵
          • Adds Run key to start application
          • Suspicious use of WriteProcessMemory
          PID:1316
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1048
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
              4⤵
              • Loads dropped DLL
              • Suspicious use of WriteProcessMemory
              PID:1168
              • C:\Users\Admin\AppData\Roaming\oos.exe
                C:\Users\Admin\AppData\Roaming\oos.exe
                5⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:952
                • C:\Users\Admin\AppData\Roaming\oos.exe
                  "{path}"
                  6⤵
                  • Executes dropped EXE
                  • Adds Run key to start application
                  • Suspicious use of SetWindowsHookEx
                  PID:1344

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        398B

        MD5

        a5d3440f90cbfae712166e20870eaed7

        SHA1

        cc1e1a2945eb2ad475234344f7527ad9e9873647

        SHA256

        960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02

        SHA512

        d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa

      • C:\Users\Admin\AppData\Roaming\oos.exe
        Filesize

        1.3MB

        MD5

        11f7f0b849c355b95c7b127880ecf903

        SHA1

        ceae025a4bf73868f960fde6171595fcef86a8f7

        SHA256

        42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

        SHA512

        215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

      • C:\Users\Admin\AppData\Roaming\oos.exe
        Filesize

        1.3MB

        MD5

        11f7f0b849c355b95c7b127880ecf903

        SHA1

        ceae025a4bf73868f960fde6171595fcef86a8f7

        SHA256

        42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

        SHA512

        215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

      • C:\Users\Admin\AppData\Roaming\oos.exe
        Filesize

        1.3MB

        MD5

        11f7f0b849c355b95c7b127880ecf903

        SHA1

        ceae025a4bf73868f960fde6171595fcef86a8f7

        SHA256

        42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

        SHA512

        215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

      • \Users\Admin\AppData\Roaming\oos.exe
        Filesize

        1.3MB

        MD5

        11f7f0b849c355b95c7b127880ecf903

        SHA1

        ceae025a4bf73868f960fde6171595fcef86a8f7

        SHA256

        42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

        SHA512

        215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

      • \Users\Admin\AppData\Roaming\oos.exe
        Filesize

        1.3MB

        MD5

        11f7f0b849c355b95c7b127880ecf903

        SHA1

        ceae025a4bf73868f960fde6171595fcef86a8f7

        SHA256

        42aa64afaf836bf9a44554d469c52d65cb987edfbe66300cd92663d8f31a188c

        SHA512

        215c423e5ae52ab43d30442f5ca80eec8d76a02db9c9556805277825f8c9004d7a379f588a89e826bf4d8e1630dc6590922e17c0d940484ed388e7d5fb27156e

      • memory/952-86-0x0000000000FF0000-0x0000000001140000-memory.dmp
        Filesize

        1.3MB

      • memory/952-84-0x0000000000000000-mapping.dmp
      • memory/1048-76-0x0000000000000000-mapping.dmp
      • memory/1168-80-0x0000000000000000-mapping.dmp
      • memory/1316-62-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-60-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-69-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-71-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-72-0x000000000043168C-mapping.dmp
      • memory/1316-75-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-66-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-77-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-65-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-64-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-59-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1316-67-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1344-101-0x000000000043168C-mapping.dmp
      • memory/1344-105-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1344-106-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1344-107-0x0000000000400000-0x000000000047E000-memory.dmp
        Filesize

        504KB

      • memory/1448-54-0x0000000001350000-0x00000000014A0000-memory.dmp
        Filesize

        1.3MB

      • memory/1448-58-0x00000000081D0000-0x0000000008288000-memory.dmp
        Filesize

        736KB

      • memory/1448-57-0x00000000083B0000-0x00000000084AC000-memory.dmp
        Filesize

        1008KB

      • memory/1448-56-0x0000000000390000-0x00000000003A2000-memory.dmp
        Filesize

        72KB

      • memory/1448-55-0x00000000758B1000-0x00000000758B3000-memory.dmp
        Filesize

        8KB