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Analysis

  • max time kernel
    178s
  • max time network
    171s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    09/10/2024, 14:11

General

  • Target

    CUS 415811343 4894584198641984198419861961961 OCTUBRE 7 DE 2024.exe

  • Size

    5.1MB

  • MD5

    06bd75f1686847255ba61a86ef69eb8a

  • SHA1

    e11abefa20031ce5f497fcb59c57e2f143a81e38

  • SHA256

    45cc400d38a6a3de5075d593718a2b63deddfc20fd97107cf01c0c0bee341adc

  • SHA512

    eb7e035aab6b1c5496dc8cebd5bb700ecf3d761747814ed8fc9a8534f989c3c84854f6878b0d076a13ca0d2d10413c10828cbb043e052566129c7c73a23bf8a7

  • SSDEEP

    49152:k9C6IGwcuCr4SOgkpEEd6HninHFdrSgoQt171nYQo7uK2oaAXIi847dmjPU7n+at:kM6FDEdjl46JHElSYwkaEIm7x/

Malware Config

Extracted

Family

remcos

Botnet

Voltarger

C2

dfgdfghghfhfh.con-ip.com:1665

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-I3REIW

  • 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.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 35 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CUS 415811343 4894584198641984198419861961961 OCTUBRE 7 DE 2024.exe
    "C:\Users\Admin\AppData\Local\Temp\CUS 415811343 4894584198641984198419861961961 OCTUBRE 7 DE 2024.exe"
    1⤵
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1036
    • C:\Users\Admin\AppData\Local\Temp\CUS 415811343 4894584198641984198419861961961 OCTUBRE 7 DE 2024.exe
      "C:\Users\Admin\AppData\Local\Temp\CUS 415811343 4894584198641984198419861961961 OCTUBRE 7 DE 2024.exe"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2860
      • C:\Users\Admin\AppData\Local\Temp\build.exe
        "C:\Users\Admin\AppData\Local\Temp\build.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:684
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
          4⤵
          • Accesses Microsoft Outlook profiles
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • outlook_office_path
          • outlook_win_path
          PID:2892

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    e00fd54000020dfa00e3f39609d7d5d7

    SHA1

    b13bd221664676fe9b0de7fdc3ed79c1f9390ca8

    SHA256

    b1df54dff8045ac221e9c980bc4a66853dddc10c6781d2a5afa5d18eb7dcad78

    SHA512

    79b2ad6b5b82616f69dc9fc8f0ae14d2946157b4f0d8b7620d3d09c91efb4f1834bf9ba897eaeb73a37cf04221c4e7969f2e5ac5503baaaa0b454a8089b48dfd

  • \Users\Admin\AppData\Local\Temp\build.exe

    Filesize

    5.1MB

    MD5

    d5beeffa4590c187698e512a78dd1530

    SHA1

    322aa0593d60fa30a258ca26e9d0a7157af9c0cf

    SHA256

    a3989a05c58f63b85f038e4a32b2f9af1b987101000c1bebd160cc121a3b9e3e

    SHA512

    e1320e21796566d6d0123e7a145ccfc90637a35a9f0127ab6fdf0721270fbd37c4bc88fedfb64e46d882c0d971a68db4c79c7e18949a892027b92f34efe7e0f6

  • memory/684-56-0x0000000000400000-0x0000000000AC9000-memory.dmp

    Filesize

    6.8MB

  • memory/684-57-0x0000000000400000-0x0000000000AC9000-memory.dmp

    Filesize

    6.8MB

  • memory/684-52-0x0000000000400000-0x0000000000AC9000-memory.dmp

    Filesize

    6.8MB

  • memory/684-63-0x0000000000400000-0x0000000000AC9000-memory.dmp

    Filesize

    6.8MB

  • memory/684-62-0x0000000000400000-0x0000000000AC9000-memory.dmp

    Filesize

    6.8MB

  • memory/684-54-0x0000000000400000-0x0000000000AC9000-memory.dmp

    Filesize

    6.8MB

  • memory/684-55-0x0000000000400000-0x0000000000AC9000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-13-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-6-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-4-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-1-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-0-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-21-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-7-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-5-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/1036-25-0x0000000000724000-0x000000000073C000-memory.dmp

    Filesize

    96KB

  • memory/1036-2-0x0000000000724000-0x000000000073C000-memory.dmp

    Filesize

    96KB

  • memory/2860-22-0x0000000000400000-0x0000000000AD7000-memory.dmp

    Filesize

    6.8MB

  • memory/2860-16-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-32-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-33-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-36-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-28-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-41-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-42-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-27-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-23-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-17-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-20-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2860-12-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-29-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2860-8-0x00000000000C0000-0x0000000000142000-memory.dmp

    Filesize

    520KB

  • memory/2892-64-0x0000000000110000-0x0000000000180000-memory.dmp

    Filesize

    448KB

  • memory/2892-86-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-65-0x0000000000110000-0x0000000000180000-memory.dmp

    Filesize

    448KB

  • memory/2892-60-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

    Filesize

    4KB

  • memory/2892-61-0x0000000000110000-0x0000000000180000-memory.dmp

    Filesize

    448KB

  • memory/2892-68-0x00000000022F0000-0x000000000238C000-memory.dmp

    Filesize

    624KB

  • memory/2892-69-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-70-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-72-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-74-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-78-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-59-0x0000000000110000-0x0000000000180000-memory.dmp

    Filesize

    448KB

  • memory/2892-76-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-90-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-88-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-84-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-82-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-80-0x00000000022F0000-0x0000000002386000-memory.dmp

    Filesize

    600KB

  • memory/2892-2962-0x0000000002390000-0x00000000023BC000-memory.dmp

    Filesize

    176KB

  • memory/2892-2963-0x0000000004610000-0x000000000465C000-memory.dmp

    Filesize

    304KB

  • memory/2892-2974-0x0000000005C10000-0x0000000005D00000-memory.dmp

    Filesize

    960KB