Analysis

  • max time kernel
    70s
  • max time network
    71s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-02-2024 16:00

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 1 IoCs
  • Orcurs Rat Executable 2 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 6 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 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:5108
    • C:\Windows\SysWOW64\WindowsInput.exe
      "C:\Windows\SysWOW64\WindowsInput.exe" --install
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      PID:3616
    • C:\Program Files (x86)\Win64\gcc.exe
      "C:\Program Files (x86)\Win64\gcc.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • 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:4848
      • C:\Users\Admin\AppData\Roaming\Sys322.exe
        "C:\Users\Admin\AppData\Roaming\Sys322.exe" /launchSelfAndExit "C:\Program Files (x86)\Win64\gcc.exe" 4848 /protectFile
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2332
        • C:\Users\Admin\AppData\Roaming\Sys322.exe
          "C:\Users\Admin\AppData\Roaming\Sys322.exe" /watchProcess "C:\Program Files (x86)\Win64\gcc.exe" 4848 "/protectFile"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:64
  • C:\Windows\SysWOW64\WindowsInput.exe
    "C:\Windows\SysWOW64\WindowsInput.exe"
    1⤵
    • Executes dropped EXE
    PID:2604
  • C:\Program Files (x86)\Win64\gcc.exe
    "C:\Program Files (x86)\Win64\gcc.exe"
    1⤵
    • Executes dropped EXE
    PID:2144

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    914KB

    MD5

    c6d06917e01beb93e4bad79537df2eb7

    SHA1

    927d7c8e85f740e35161a5de831771160d81cb95

    SHA256

    c4288fddf7805d6ecfe23adb3f4b687f69d6848d790d4abc672324581a1d0a73

    SHA512

    082ba84dd4d1c1e7ba34077f5d3cacfdf02c2b904d7cdb73ed59269b734c802e817e18ece928c021a0e05c54b497da168dcd1a830148032dff3b19c354bab0cb

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Sys322.exe.log

    Filesize

    425B

    MD5

    4eaca4566b22b01cd3bc115b9b0b2196

    SHA1

    e743e0792c19f71740416e7b3c061d9f1336bf94

    SHA256

    34ba0ab8d1850e7825763f413142a333ccbc05fa2b5499a28a7d27b8a1c5b4bb

    SHA512

    bc2b1bf45203e3bb3009a7d37617b8f0f7ffa613680b32de2b963e39d2cf1650614d7035a0cf78f35a4f5cb17a2a439e2e07deaefd2a4275a62efd0a5c0184a1

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

    Filesize

    9KB

    MD5

    913967b216326e36a08010fb70f9dba3

    SHA1

    7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

    SHA256

    8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

    SHA512

    c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

  • C:\Windows\SysWOW64\WindowsInput.exe

    Filesize

    21KB

    MD5

    e6fcf516d8ed8d0d4427f86e08d0d435

    SHA1

    c7691731583ab7890086635cb7f3e4c22ca5e409

    SHA256

    8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

    SHA512

    c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

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

    Filesize

    357B

    MD5

    a2b76cea3a59fa9af5ea21ff68139c98

    SHA1

    35d76475e6a54c168f536e30206578babff58274

    SHA256

    f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

    SHA512

    b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

  • memory/64-86-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/64-79-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2144-81-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2144-56-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2332-73-0x0000000000DB0000-0x0000000000DB8000-memory.dmp

    Filesize

    32KB

  • memory/2332-74-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2332-78-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2604-32-0x00007FFE86510000-0x00007FFE86FD1000-memory.dmp

    Filesize

    10.8MB

  • memory/2604-82-0x00007FFE86510000-0x00007FFE86FD1000-memory.dmp

    Filesize

    10.8MB

  • memory/2604-34-0x000000001AB30000-0x000000001AC3A000-memory.dmp

    Filesize

    1.0MB

  • memory/2604-83-0x0000000001B40000-0x0000000001B50000-memory.dmp

    Filesize

    64KB

  • memory/2604-33-0x0000000001B40000-0x0000000001B50000-memory.dmp

    Filesize

    64KB

  • memory/3616-23-0x00007FFE86510000-0x00007FFE86FD1000-memory.dmp

    Filesize

    10.8MB

  • memory/3616-24-0x000000001AF20000-0x000000001AF30000-memory.dmp

    Filesize

    64KB

  • memory/3616-30-0x00007FFE86510000-0x00007FFE86FD1000-memory.dmp

    Filesize

    10.8MB

  • memory/3616-22-0x00000000000D0000-0x00000000000DC000-memory.dmp

    Filesize

    48KB

  • memory/3616-26-0x0000000000910000-0x000000000094C000-memory.dmp

    Filesize

    240KB

  • memory/3616-25-0x00000000008B0000-0x00000000008C2000-memory.dmp

    Filesize

    72KB

  • memory/4848-51-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/4848-53-0x0000000005790000-0x00000000057DE000-memory.dmp

    Filesize

    312KB

  • memory/4848-55-0x0000000005940000-0x0000000005958000-memory.dmp

    Filesize

    96KB

  • memory/4848-52-0x0000000004A70000-0x0000000004A80000-memory.dmp

    Filesize

    64KB

  • memory/4848-57-0x0000000005B10000-0x0000000005B20000-memory.dmp

    Filesize

    64KB

  • memory/4848-58-0x0000000005CF0000-0x0000000005EB2000-memory.dmp

    Filesize

    1.8MB

  • memory/4848-59-0x00000000062A0000-0x00000000062AA000-memory.dmp

    Filesize

    40KB

  • memory/4848-85-0x0000000004A70000-0x0000000004A80000-memory.dmp

    Filesize

    64KB

  • memory/4848-84-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/5108-8-0x0000000005960000-0x0000000005982000-memory.dmp

    Filesize

    136KB

  • memory/5108-1-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/5108-2-0x0000000002E20000-0x0000000002E30000-memory.dmp

    Filesize

    64KB

  • memory/5108-7-0x00000000054F0000-0x0000000005502000-memory.dmp

    Filesize

    72KB

  • memory/5108-50-0x00000000752F0000-0x0000000075AA0000-memory.dmp

    Filesize

    7.7MB

  • memory/5108-6-0x0000000005510000-0x00000000055A2000-memory.dmp

    Filesize

    584KB

  • memory/5108-5-0x00000000059B0000-0x0000000005F54000-memory.dmp

    Filesize

    5.6MB

  • memory/5108-3-0x0000000002E00000-0x0000000002E0E000-memory.dmp

    Filesize

    56KB

  • memory/5108-0-0x0000000000A50000-0x0000000000B3A000-memory.dmp

    Filesize

    936KB

  • memory/5108-4-0x00000000053A0000-0x00000000053FC000-memory.dmp

    Filesize

    368KB