Resubmissions

26-10-2024 23:19

241026-3a1rfsxrgm 10

26-10-2024 23:18

241026-3absbs1fnl 10

26-10-2024 23:16

241026-29dkjaymaw 10

Analysis

  • max time kernel
    35s
  • max time network
    35s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-10-2024 23:16

General

  • Target

    test.exe

  • Size

    3.0MB

  • MD5

    7b3150ddd3df859f8f6f36cb041b23f7

  • SHA1

    c3934ab76025c17cab3d309a96c1e32df9ad9d65

  • SHA256

    675a8aa47c9032b3588c440435744c3a01c04edc4ea204631eee0b53f0405a8f

  • SHA512

    a1fe1559965a5eac9a6eef26bbcd559d8a3aa1719f81c35e4106ca0664805cde9566e7bd163fc63a27e356e034b64ef6af5a0f4a299997352bdf4b51e6b6d214

  • SSDEEP

    49152:ONJEKO3T5adZKM0sz5otCeEvsDKx+msbfGGW8wlBKJwAypQxbxEo9JnCmmYXdrZz:ONJtODUKTslWp2MpbfGGilIJPypSbxEw

Malware Config

Extracted

Family

orcus

C2

Index1337z-43991.portmap.host:43991

Mutex

be9b19219c62425cbffd5b98125d81a6

Attributes
  • autostart_method

    Disable

  • enable_keylogger

    false

  • install_path

    %programfiles%\Orcus\Orcus.exe

  • reconnect_delay

    10000

  • registry_keyname

    Orcus

  • taskscheduler_taskname

    Orcus

  • watchdog_path

    AppData\OrcusWatchdog.exe

Signatures

  • Contains code to disable Windows Defender 1 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 7 IoCs
  • Orcus

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

  • Orcus family
  • Orcus main payload 1 IoCs
  • UAC bypass 3 TTPs 6 IoCs
  • Orcurs Rat Executable 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Hijack Execution Flow: Executable Installer File Permissions Weakness 1 TTPs 2 IoCs

    Possible Turn off User Account Control's privilege elevation for standard users.

  • 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • System policy modification 1 TTPs 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\test.exe
    "C:\Users\Admin\AppData\Local\Temp\test.exe"
    1⤵
    • Modifies Windows Defender Real-time Protection settings
    • UAC bypass
    • Checks computer location settings
    • Windows security modification
    • Checks whether UAC is enabled
    • Hijack Execution Flow: Executable Installer File Permissions Weakness
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3436
    • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\fdorqgj3.cmdline"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3156
      • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
        C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESAB54.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCAB44.tmp"
        3⤵
          PID:3700
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4104
      • C:\Program Files\Orcus\Orcus.exe
        "C:\Program Files\Orcus\Orcus.exe"
        2⤵
        • Modifies Windows Defender Real-time Protection settings
        • UAC bypass
        • Executes dropped EXE
        • Windows security modification
        • Checks whether UAC is enabled
        • Hijack Execution Flow: Executable Installer File Permissions Weakness
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:2860
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Get-MpPreference -verbose
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4308

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files\Orcus\Orcus.exe

      Filesize

      3.0MB

      MD5

      7b3150ddd3df859f8f6f36cb041b23f7

      SHA1

      c3934ab76025c17cab3d309a96c1e32df9ad9d65

      SHA256

      675a8aa47c9032b3588c440435744c3a01c04edc4ea204631eee0b53f0405a8f

      SHA512

      a1fe1559965a5eac9a6eef26bbcd559d8a3aa1719f81c35e4106ca0664805cde9566e7bd163fc63a27e356e034b64ef6af5a0f4a299997352bdf4b51e6b6d214

    • C:\Program Files\Orcus\Orcus.exe.config

      Filesize

      349B

      MD5

      89817519e9e0b4e703f07e8c55247861

      SHA1

      4636de1f6c997a25c3190f73f46a3fd056238d78

      SHA256

      f40dfaa50dcbff93611d45607009158f798e9cd845170939b1d6088a7d10ee13

      SHA512

      b017cb7a522b9c6794f3691cb7266ec82f565a90d7d07cc9beb53b939d2e9bf34275bc25f6f32d9a9c7136a0aab2189d9556af7244450c610d11ed7a4f584ba3

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

      Filesize

      2KB

      MD5

      d85ba6ff808d9e5444a4b369f5bc2730

      SHA1

      31aa9d96590fff6981b315e0b391b575e4c0804a

      SHA256

      84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

      SHA512

      8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      77d622bb1a5b250869a3238b9bc1402b

      SHA1

      d47f4003c2554b9dfc4c16f22460b331886b191b

      SHA256

      f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

      SHA512

      d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

    • C:\Users\Admin\AppData\Local\Temp\RESAB54.tmp

      Filesize

      1KB

      MD5

      2f98a96851eade64cc1e29d1a9cfc3e7

      SHA1

      19e3e51109fc26b3fed4bbfe679c8425004ce553

      SHA256

      2f9c35bad1a7f83877c9a61da724c03427b77c5c2447d9a50f46d7add1725924

      SHA512

      0dd4735db23ee222a0becf0f6ac7d56baba64e739d93497255c10ef9a5b3ea06213f162d478638fc95c3b33e0d2d9f0ca1eb5b0e47471b19b2c499cc07fc4a3a

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_b5gro2zk.u4c.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\fdorqgj3.dll

      Filesize

      76KB

      MD5

      81b311dfe901c7b74c066c938e10b4fc

      SHA1

      ad469a13cfc3322322bf420fca56488cd88e96ec

      SHA256

      b333514cbe187d79a301abfb1e9a72a3a8a29e2fc6f394516db34e7de7a41382

      SHA512

      50ddb0a79646167fa69a858eb1fb80b4d07e2b5085761dc82770baee28cd61a638df41de75fba9e1d08392b7cf0bc9b93be32e0a3530268f12c8cd9e714b61ab

    • \??\c:\Users\Admin\AppData\Local\Temp\CSCAB44.tmp

      Filesize

      676B

      MD5

      e765db30e1c17f80f99cc7770e38dd5f

      SHA1

      42e6d30dfb93425265347b7970304c479947739f

      SHA256

      84666eeed177fdab724428c93e7347bead11ac8be99af24c04d9bdb9524a2a07

      SHA512

      8351f450bdb90193f2c01bb82be8ef1e9e3caad3addfa6321dd8d22821e94161429cf14fe35d4c077a36e469b14c613c2125e5d380df7abb832cb7f4ebfddad7

    • \??\c:\Users\Admin\AppData\Local\Temp\fdorqgj3.0.cs

      Filesize

      208KB

      MD5

      9d78b6ef0cf0f7efd4d774ffda46759c

      SHA1

      a04f6bc1a9bf598ef41030d5a9691dfc8270c0a2

      SHA256

      691d94681dd6005b1f78c7e6452d202f06a3527d105a8ce7740b1a57133f204b

      SHA512

      bf951713645762fc8b28b0fd6b9b89f3bf878137a71129070d8171e3b3ef936e10ef3979eb5ebf8cca63f10beff790d1b2d6f3e01c9604e78c4d73b082e14c0b

    • \??\c:\Users\Admin\AppData\Local\Temp\fdorqgj3.cmdline

      Filesize

      349B

      MD5

      8570395a563330dec5114e0efbdd2000

      SHA1

      1c0f872aef6928ac65f0aea7bd2b6664128fca6d

      SHA256

      45bb56920c22e3c3061cdac80b5db77357891ca5435f6defa073ab1b0c0d3834

      SHA512

      6c915cb866129e3312fa7e72e9448600889d31fa23eecd125f2303bacfac1b7c6c427436d24256184cec029d46af61cdd7449b24fee7eea67c2ee97ed536928f

    • memory/2860-62-0x000000001AF50000-0x000000001AF60000-memory.dmp

      Filesize

      64KB

    • memory/2860-59-0x0000000000030000-0x000000000032C000-memory.dmp

      Filesize

      3.0MB

    • memory/2860-61-0x000000001AF30000-0x000000001AF48000-memory.dmp

      Filesize

      96KB

    • memory/3156-12-0x00007FFD9EF70000-0x00007FFD9F911000-memory.dmp

      Filesize

      9.6MB

    • memory/3156-19-0x00007FFD9EF70000-0x00007FFD9F911000-memory.dmp

      Filesize

      9.6MB

    • memory/3436-24-0x000000001BBB0000-0x000000001BBBA000-memory.dmp

      Filesize

      40KB

    • memory/3436-60-0x00007FFD9EF70000-0x00007FFD9F911000-memory.dmp

      Filesize

      9.6MB

    • memory/3436-25-0x000000001BBA0000-0x000000001BBA8000-memory.dmp

      Filesize

      32KB

    • memory/3436-26-0x00007FFD9EF70000-0x00007FFD9F911000-memory.dmp

      Filesize

      9.6MB

    • memory/3436-1-0x00007FFD9EF70000-0x00007FFD9F911000-memory.dmp

      Filesize

      9.6MB

    • memory/3436-0-0x00007FFD9F225000-0x00007FFD9F226000-memory.dmp

      Filesize

      4KB

    • memory/3436-23-0x000000001BBD0000-0x000000001BBE2000-memory.dmp

      Filesize

      72KB

    • memory/3436-2-0x000000001BCA0000-0x000000001BCFC000-memory.dmp

      Filesize

      368KB

    • memory/3436-3-0x0000000001740000-0x000000000174E000-memory.dmp

      Filesize

      56KB

    • memory/3436-4-0x00007FFD9EF70000-0x00007FFD9F911000-memory.dmp

      Filesize

      9.6MB

    • memory/3436-21-0x000000001CAE0000-0x000000001CAF6000-memory.dmp

      Filesize

      88KB

    • memory/3436-6-0x000000001CA40000-0x000000001CADC000-memory.dmp

      Filesize

      624KB

    • memory/3436-5-0x000000001C4D0000-0x000000001C99E000-memory.dmp

      Filesize

      4.8MB

    • memory/4104-32-0x000002A878A10000-0x000002A878A32000-memory.dmp

      Filesize

      136KB

    • memory/4104-46-0x00007FFD9AF10000-0x00007FFD9B9D1000-memory.dmp

      Filesize

      10.8MB

    • memory/4104-43-0x00007FFD9AF10000-0x00007FFD9B9D1000-memory.dmp

      Filesize

      10.8MB

    • memory/4104-42-0x00007FFD9AF10000-0x00007FFD9B9D1000-memory.dmp

      Filesize

      10.8MB

    • memory/4104-31-0x00007FFD9AF13000-0x00007FFD9AF15000-memory.dmp

      Filesize

      8KB