Analysis

  • max time kernel
    41s
  • max time network
    40s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    08-02-2024 16:02

General

  • Target

    file.exe

  • Size

    914KB

  • MD5

    c6d06917e01beb93e4bad79537df2eb7

  • SHA1

    927d7c8e85f740e35161a5de831771160d81cb95

  • SHA256

    c4288fddf7805d6ecfe23adb3f4b687f69d6848d790d4abc672324581a1d0a73

  • SHA512

    082ba84dd4d1c1e7ba34077f5d3cacfdf02c2b904d7cdb73ed59269b734c802e817e18ece928c021a0e05c54b497da168dcd1a830148032dff3b19c354bab0cb

  • SSDEEP

    24576:eW64MROxnFD3orXYf1rrcI0AilFEvxHPtooX:eKMiJhrrcI0AilFEvxHP

Malware Config

Extracted

Family

orcus

C2

7.tcp.eu.ngrok.io:17912

Mutex

0133d229c4e24006957c0e4ab3a52531

Attributes
  • autostart_method

    Registry

  • enable_keylogger

    true

  • install_path

    %programfiles%\Win64\gcc.exe

  • reconnect_delay

    10000

  • registry_keyname

    System3222

  • taskscheduler_taskname

    System3222

  • watchdog_path

    AppData\Sys322.exe

Signatures

  • Orcus

    Orcus is a Remote Access Trojan that is being sold on underground forums.

  • Orcus main payload 2 IoCs
  • Orcurs Rat Executable 4 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:624
    • C:\Windows\SysWOW64\WindowsInput.exe
      "C:\Windows\SysWOW64\WindowsInput.exe" --install
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      PID:3048
    • C:\Program Files (x86)\Win64\gcc.exe
      "C:\Program Files (x86)\Win64\gcc.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2752
      • C:\Users\Admin\AppData\Roaming\Sys322.exe
        "C:\Users\Admin\AppData\Roaming\Sys322.exe" /launchSelfAndExit "C:\Program Files (x86)\Win64\gcc.exe" 2752 /protectFile
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2820
        • C:\Users\Admin\AppData\Roaming\Sys322.exe
          "C:\Users\Admin\AppData\Roaming\Sys322.exe" /watchProcess "C:\Program Files (x86)\Win64\gcc.exe" 2752 "/protectFile"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2156
  • C:\Windows\SysWOW64\WindowsInput.exe
    "C:\Windows\SysWOW64\WindowsInput.exe"
    1⤵
    • Executes dropped EXE
    PID:2892
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {3B0BF630-C09C-4AEC-88A3-981919EC5F46} S-1-5-21-3601492379-692465709-652514833-1000:CALKHSYM\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3024
    • C:\Program Files (x86)\Win64\gcc.exe
      "C:\Program Files (x86)\Win64\gcc.exe"
      2⤵
      • Executes dropped EXE
      PID:1216

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Win64\gcc.exe

    Filesize

    832KB

    MD5

    7291a4827f0a97d07e679941e8e21d62

    SHA1

    b79974039177e4d615edfc34447e76caa0b7cba7

    SHA256

    9baa0ac148d1d9b1a03d2eb4aa94bee500a82a2f7e2b4fd11a6888d04f0c7a89

    SHA512

    ff7cd9fc7dfa0bdcc5bf9185db63bba4f020f27c9de7307514b972c154a526dfe4f9176c9d9281cfdc99a1aac9015da9650aaf92a0d67f18ef08aad575862bb2

  • C:\Windows\SysWOW64\WindowsInput.exe.config

    Filesize

    357B

    MD5

    a2b76cea3a59fa9af5ea21ff68139c98

    SHA1

    35d76475e6a54c168f536e30206578babff58274

    SHA256

    f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

    SHA512

    b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

  • \Program Files (x86)\Win64\gcc.exe

    Filesize

    914KB

    MD5

    c6d06917e01beb93e4bad79537df2eb7

    SHA1

    927d7c8e85f740e35161a5de831771160d81cb95

    SHA256

    c4288fddf7805d6ecfe23adb3f4b687f69d6848d790d4abc672324581a1d0a73

    SHA512

    082ba84dd4d1c1e7ba34077f5d3cacfdf02c2b904d7cdb73ed59269b734c802e817e18ece928c021a0e05c54b497da168dcd1a830148032dff3b19c354bab0cb

  • \Users\Admin\AppData\Roaming\Sys322.exe

    Filesize

    9KB

    MD5

    913967b216326e36a08010fb70f9dba3

    SHA1

    7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

    SHA256

    8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

    SHA512

    c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

  • \Windows\SysWOW64\WindowsInput.exe

    Filesize

    21KB

    MD5

    e6fcf516d8ed8d0d4427f86e08d0d435

    SHA1

    c7691731583ab7890086635cb7f3e4c22ca5e409

    SHA256

    8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

    SHA512

    c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

  • memory/624-5-0x0000000000410000-0x0000000000422000-memory.dmp

    Filesize

    72KB

  • memory/624-35-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/624-4-0x00000000005D0000-0x000000000062C000-memory.dmp

    Filesize

    368KB

  • memory/624-0-0x0000000000EF0000-0x0000000000FDA000-memory.dmp

    Filesize

    936KB

  • memory/624-3-0x0000000000300000-0x000000000030E000-memory.dmp

    Filesize

    56KB

  • memory/624-2-0x0000000004970000-0x00000000049B0000-memory.dmp

    Filesize

    256KB

  • memory/624-1-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/1216-57-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/1216-53-0x0000000004B10000-0x0000000004B50000-memory.dmp

    Filesize

    256KB

  • memory/1216-48-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/2156-55-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/2156-61-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/2752-34-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/2752-36-0x0000000000A50000-0x0000000000A90000-memory.dmp

    Filesize

    256KB

  • memory/2752-33-0x0000000000CB0000-0x0000000000D9A000-memory.dmp

    Filesize

    936KB

  • memory/2752-37-0x0000000000A00000-0x0000000000A4E000-memory.dmp

    Filesize

    312KB

  • memory/2752-38-0x0000000000C70000-0x0000000000C88000-memory.dmp

    Filesize

    96KB

  • memory/2752-39-0x0000000002290000-0x00000000022A0000-memory.dmp

    Filesize

    64KB

  • memory/2752-59-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/2752-60-0x0000000000A50000-0x0000000000A90000-memory.dmp

    Filesize

    256KB

  • memory/2820-51-0x0000000000A80000-0x0000000000A88000-memory.dmp

    Filesize

    32KB

  • memory/2820-52-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/2820-56-0x0000000074130000-0x000000007481E000-memory.dmp

    Filesize

    6.9MB

  • memory/2892-22-0x000007FEF4A40000-0x000007FEF542C000-memory.dmp

    Filesize

    9.9MB

  • memory/2892-21-0x0000000000330000-0x000000000033C000-memory.dmp

    Filesize

    48KB

  • memory/2892-58-0x000007FEF4A40000-0x000007FEF542C000-memory.dmp

    Filesize

    9.9MB

  • memory/3048-19-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

    Filesize

    9.9MB

  • memory/3048-16-0x0000000000A70000-0x0000000000AF0000-memory.dmp

    Filesize

    512KB

  • memory/3048-15-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

    Filesize

    9.9MB

  • memory/3048-14-0x0000000000B00000-0x0000000000B0C000-memory.dmp

    Filesize

    48KB