Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    12-04-2024 01:30

General

  • Target

    b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe

  • Size

    910KB

  • MD5

    783addabb1e7dcb48130649faaf852c7

  • SHA1

    c87553da7df62530e9262b35930d6a15aff4949a

  • SHA256

    b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da

  • SHA512

    9f352fd443bd680a71ce1a4ece252baa81c2c293727d520ce57da93d461808f50be6c22f4a6f8e0a18f0857785b47f783f1f3cc6c41442275c12149e067b3c3b

  • SSDEEP

    24576:IsWW2f6w8r89u8TeWMkzIULsHTJMGoMzyc/VdK:IsT2fTC8BSWMkluMMzyctd

Score
10/10

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

bignight.net:3363

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-1XSDBO

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 15 IoCs
  • Detects executables packed with SmartAssembly 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe
    "C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2992
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2628
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\HFqduGIsFotY.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2552
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HFqduGIsFotY" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8102.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2608
    • C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe
      "C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
      2⤵
        PID:2400
      • C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe
        "C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
        2⤵
          PID:2660
        • C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe
          "C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
          2⤵
            PID:3048
          • C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe
            "C:\Users\Admin\AppData\Local\Temp\b162074bf62543007615d08db1dffa75022858944a0ecc5de5ed8d3be561e3da.exe"
            2⤵
            • Suspicious use of SetWindowsHookEx
            PID:2864

        Network

        MITRE ATT&CK Matrix ATT&CK v13

        Execution

        Scheduled Task/Job

        1
        T1053

        Persistence

        Scheduled Task/Job

        1
        T1053

        Privilege Escalation

        Scheduled Task/Job

        1
        T1053

        Discovery

        System Information Discovery

        1
        T1082

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat
          Filesize

          144B

          MD5

          cb68646e469e4f0e883005dc750e338f

          SHA1

          f40359c370e449791dc578906cb0b2e02740975f

          SHA256

          93dfa8b65d9ea046049eb6213c50ee5afa2c0c741a4eb6cec3dfe271fca806f8

          SHA512

          c514f4eacf883ab2864c1115c38ef77e3133ecfbfdfac577914d34850786cbe4ef62c33d492b2271e3856bd580ac9fff94ab9215f0e6a584fc81cc2762743f9c

        • C:\Users\Admin\AppData\Local\Temp\tmp8102.tmp
          Filesize

          1KB

          MD5

          a55185ed181a78a7821404b0e9b2d93a

          SHA1

          2e7dc9063fffec7022b6124e2e95f6c21532ad09

          SHA256

          fe8bfc9154aa5f70c06411e08099ea3a02ed087a89a24fe5c161324c25bfd5a3

          SHA512

          02db066ecd5202db04a1e0fb50c59dcf92f724e6707afb87e37a7bf9cd90ea6fafcb4b6ab6153587866d2036ecf370834fd912a00a99a6a749e2f20f5eadbee9

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\P1D9SOW0H1N2D0LFN1ZU.temp
          Filesize

          7KB

          MD5

          d2cf0baa8a9c287b747c0d458b782ce2

          SHA1

          b656af9699bd80bc6b850ddc10a9835a4ca3f3e8

          SHA256

          1ec1b146b60dd91070cd0ef2f0d0a9dc23dd68ea6319993abbc10143e2cafb1d

          SHA512

          fcf0bb35bc4d97cb23e8f7fb1ec1a66be85d6c3307786a6b4c87bd55e954e9e5cfd28abb9056de9704f12fff948a8c5493a5f1cf6d64e3af4ab25b95c2700fea

        • memory/2552-35-0x0000000002600000-0x0000000002640000-memory.dmp
          Filesize

          256KB

        • memory/2552-40-0x000000006F640000-0x000000006FBEB000-memory.dmp
          Filesize

          5.7MB

        • memory/2552-29-0x0000000002600000-0x0000000002640000-memory.dmp
          Filesize

          256KB

        • memory/2552-19-0x000000006F640000-0x000000006FBEB000-memory.dmp
          Filesize

          5.7MB

        • memory/2552-33-0x0000000002600000-0x0000000002640000-memory.dmp
          Filesize

          256KB

        • memory/2552-22-0x000000006F640000-0x000000006FBEB000-memory.dmp
          Filesize

          5.7MB

        • memory/2628-25-0x000000006F640000-0x000000006FBEB000-memory.dmp
          Filesize

          5.7MB

        • memory/2628-39-0x000000006F640000-0x000000006FBEB000-memory.dmp
          Filesize

          5.7MB

        • memory/2628-31-0x00000000021A0000-0x00000000021E0000-memory.dmp
          Filesize

          256KB

        • memory/2628-20-0x000000006F640000-0x000000006FBEB000-memory.dmp
          Filesize

          5.7MB

        • memory/2628-23-0x00000000021A0000-0x00000000021E0000-memory.dmp
          Filesize

          256KB

        • memory/2628-27-0x00000000021A0000-0x00000000021E0000-memory.dmp
          Filesize

          256KB

        • memory/2864-21-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-58-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-24-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-36-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-30-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-64-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-34-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-63-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-26-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-46-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-57-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-37-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-38-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
          Filesize

          4KB

        • memory/2864-32-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-52-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-51-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-50-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-44-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2864-48-0x0000000000400000-0x0000000000482000-memory.dmp
          Filesize

          520KB

        • memory/2992-6-0x0000000005CA0000-0x0000000005D60000-memory.dmp
          Filesize

          768KB

        • memory/2992-47-0x00000000749E0000-0x00000000750CE000-memory.dmp
          Filesize

          6.9MB

        • memory/2992-42-0x0000000004DB0000-0x0000000004DF0000-memory.dmp
          Filesize

          256KB

        • memory/2992-41-0x00000000749E0000-0x00000000750CE000-memory.dmp
          Filesize

          6.9MB

        • memory/2992-5-0x0000000000560000-0x000000000056C000-memory.dmp
          Filesize

          48KB

        • memory/2992-2-0x0000000004DB0000-0x0000000004DF0000-memory.dmp
          Filesize

          256KB

        • memory/2992-4-0x00000000004D0000-0x00000000004D8000-memory.dmp
          Filesize

          32KB

        • memory/2992-1-0x00000000749E0000-0x00000000750CE000-memory.dmp
          Filesize

          6.9MB

        • memory/2992-0-0x0000000000120000-0x000000000020A000-memory.dmp
          Filesize

          936KB

        • memory/2992-3-0x0000000000530000-0x0000000000548000-memory.dmp
          Filesize

          96KB