Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-06-2024 01:10

General

  • Target

    3570ab4d0875c600215d15ba9d9e439c5a61b16fb40b50c0202097dbca58ee5d.exe

  • Size

    921KB

  • MD5

    5dc7ba557d1063adef1eb6ddd8e0fd7e

  • SHA1

    0e5a33a81db4709ddfc591c8b2dc5ec1958fc0ca

  • SHA256

    3570ab4d0875c600215d15ba9d9e439c5a61b16fb40b50c0202097dbca58ee5d

  • SHA512

    2b3da40b9684d6e1aac29967ddaa1a300b59afd4b9b59b74e094c66d20cae979c9a9780c202d4e3ad96270dd06820df500b5bfb798129dbbb8cb0254f9360a56

  • SSDEEP

    24576:5ey4MROxnFt3/YrrcI0AilFEvxHPUooL:5aMijgrrcI0AilFEvxHP

Malware Config

Extracted

Family

orcus

C2

te1.tunnelin.com:58172

Mutex

db6d3ae780044a5887936785b42c15ad

Attributes
  • autostart_method

    TaskScheduler

  • enable_keylogger

    true

  • install_path

    %programdata%\Microsoft Security\ntoskrnl.exe

  • reconnect_delay

    10000

  • registry_keyname

    Windows Defender

  • taskscheduler_taskname

    Microsoft_Security

  • watchdog_path

    Temp\5BE731319AC3C9A3FBF49A732595E665F.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
  • Drops file in System32 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3570ab4d0875c600215d15ba9d9e439c5a61b16fb40b50c0202097dbca58ee5d.exe
    "C:\Users\Admin\AppData\Local\Temp\3570ab4d0875c600215d15ba9d9e439c5a61b16fb40b50c0202097dbca58ee5d.exe"
    1⤵
    • Checks computer location settings
    • Drops file in System32 directory
    • Suspicious use of WriteProcessMemory
    PID:4048
    • C:\Windows\SysWOW64\WindowsInput.exe
      "C:\Windows\SysWOW64\WindowsInput.exe" --install
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      PID:4696
    • C:\ProgramData\Microsoft Security\ntoskrnl.exe
      "C:\ProgramData\Microsoft Security\ntoskrnl.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4624
      • C:\Users\Admin\AppData\Local\Temp\5BE731319AC3C9A3FBF49A732595E665F.exe
        "C:\Users\Admin\AppData\Local\Temp\5BE731319AC3C9A3FBF49A732595E665F.exe" /launchSelfAndExit "C:\ProgramData\Microsoft Security\ntoskrnl.exe" 4624 /protectFile
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2996
        • C:\Users\Admin\AppData\Local\Temp\5BE731319AC3C9A3FBF49A732595E665F.exe
          "C:\Users\Admin\AppData\Local\Temp\5BE731319AC3C9A3FBF49A732595E665F.exe" /watchProcess "C:\ProgramData\Microsoft Security\ntoskrnl.exe" 4624 "/protectFile"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2616
  • C:\Windows\SysWOW64\WindowsInput.exe
    "C:\Windows\SysWOW64\WindowsInput.exe"
    1⤵
    • Executes dropped EXE
    PID:3740
  • C:\ProgramData\Microsoft Security\ntoskrnl.exe
    "C:\ProgramData\Microsoft Security\ntoskrnl.exe"
    1⤵
    • Executes dropped EXE
    PID:4944

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\Microsoft Security\ntoskrnl.exe

    Filesize

    921KB

    MD5

    5dc7ba557d1063adef1eb6ddd8e0fd7e

    SHA1

    0e5a33a81db4709ddfc591c8b2dc5ec1958fc0ca

    SHA256

    3570ab4d0875c600215d15ba9d9e439c5a61b16fb40b50c0202097dbca58ee5d

    SHA512

    2b3da40b9684d6e1aac29967ddaa1a300b59afd4b9b59b74e094c66d20cae979c9a9780c202d4e3ad96270dd06820df500b5bfb798129dbbb8cb0254f9360a56

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\5BE731319AC3C9A3FBF49A732595E665F.exe.log

    Filesize

    425B

    MD5

    4eaca4566b22b01cd3bc115b9b0b2196

    SHA1

    e743e0792c19f71740416e7b3c061d9f1336bf94

    SHA256

    34ba0ab8d1850e7825763f413142a333ccbc05fa2b5499a28a7d27b8a1c5b4bb

    SHA512

    bc2b1bf45203e3bb3009a7d37617b8f0f7ffa613680b32de2b963e39d2cf1650614d7035a0cf78f35a4f5cb17a2a439e2e07deaefd2a4275a62efd0a5c0184a1

  • C:\Users\Admin\AppData\Local\Temp\5BE731319AC3C9A3FBF49A732595E665F.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/2996-72-0x0000000000C90000-0x0000000000C98000-memory.dmp

    Filesize

    32KB

  • memory/3740-34-0x000000001ABE0000-0x000000001ACEA000-memory.dmp

    Filesize

    1.0MB

  • memory/3740-33-0x00007FFE7B8E3000-0x00007FFE7B8E5000-memory.dmp

    Filesize

    8KB

  • memory/4048-51-0x0000000075230000-0x00000000759E0000-memory.dmp

    Filesize

    7.7MB

  • memory/4048-5-0x00000000051B0000-0x0000000005754000-memory.dmp

    Filesize

    5.6MB

  • memory/4048-8-0x0000000004CB0000-0x0000000004CB8000-memory.dmp

    Filesize

    32KB

  • memory/4048-7-0x0000000004CA0000-0x0000000004CB2000-memory.dmp

    Filesize

    72KB

  • memory/4048-1-0x00000000000C0000-0x00000000001AC000-memory.dmp

    Filesize

    944KB

  • memory/4048-2-0x00000000024A0000-0x00000000024AE000-memory.dmp

    Filesize

    56KB

  • memory/4048-3-0x0000000004B40000-0x0000000004B9C000-memory.dmp

    Filesize

    368KB

  • memory/4048-9-0x0000000005120000-0x0000000005142000-memory.dmp

    Filesize

    136KB

  • memory/4048-0-0x000000007523E000-0x000000007523F000-memory.dmp

    Filesize

    4KB

  • memory/4048-4-0x0000000075230000-0x00000000759E0000-memory.dmp

    Filesize

    7.7MB

  • memory/4048-6-0x0000000004CC0000-0x0000000004D52000-memory.dmp

    Filesize

    584KB

  • memory/4624-55-0x0000000005CE0000-0x0000000005CF8000-memory.dmp

    Filesize

    96KB

  • memory/4624-52-0x00000000053F0000-0x000000000543E000-memory.dmp

    Filesize

    312KB

  • memory/4624-53-0x0000000005B30000-0x0000000005B48000-memory.dmp

    Filesize

    96KB

  • memory/4624-56-0x0000000006090000-0x0000000006252000-memory.dmp

    Filesize

    1.8MB

  • memory/4624-57-0x0000000005EB0000-0x0000000005EC0000-memory.dmp

    Filesize

    64KB

  • memory/4624-58-0x00000000063D0000-0x00000000063DA000-memory.dmp

    Filesize

    40KB

  • memory/4696-31-0x00007FFE7B160000-0x00007FFE7BC21000-memory.dmp

    Filesize

    10.8MB

  • memory/4696-27-0x00007FFE7B160000-0x00007FFE7BC21000-memory.dmp

    Filesize

    10.8MB

  • memory/4696-25-0x0000000000910000-0x0000000000922000-memory.dmp

    Filesize

    72KB

  • memory/4696-26-0x0000000000970000-0x00000000009AC000-memory.dmp

    Filesize

    240KB

  • memory/4696-24-0x00007FFE7B163000-0x00007FFE7B165000-memory.dmp

    Filesize

    8KB

  • memory/4696-23-0x0000000000110000-0x000000000011C000-memory.dmp

    Filesize

    48KB