Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-12-2024 01:07

General

  • Target

    5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe

  • Size

    924KB

  • MD5

    62d70f8671fd2008fc9f0e17d57d809c

  • SHA1

    8b743631a6ea12f7c00a3b586ebdc4e81d0cd892

  • SHA256

    5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d

  • SHA512

    58bf0a6e47079c3d38380966ac5216249e6eadff1c4d867cf72af1becde10de3ce5e75a4b0b59e832ab4983b65f1af1cd8c855620b744c33aee3c55debee14f4

  • SSDEEP

    24576:ZGbU4MROxnFE3idc1RlrZlI0AilFEvxHiaj:ZGbHMiudblrZlI0AilFEvxHi

Malware Config

Extracted

Family

orcus

Botnet

testbuild1

C2

127.0.0.1:1268

Mutex

979c2ee9d7ff48d0a2e4e2df3c2c864d

Attributes
  • autostart_method

    Registry

  • enable_keylogger

    true

  • install_path

    %programfiles%\Common Files\System\HD Audio\HDAudio.exe

  • reconnect_delay

    10000

  • registry_keyname

    HDAudioDriver

  • taskscheduler_taskname

    HDAudioDriver

  • watchdog_path

    AppData\HDAudioWatchdog.exe

Signatures

  • Orcus

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

  • Orcus family
  • 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
  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
    "C:\Users\Admin\AppData\Local\Temp\5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe"
    1⤵
    • Checks computer location settings
    • Drops desktop.ini file(s)
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:3528
    • 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\8xzrb__n.cmdline"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2456
      • 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\RES93D5.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC93D4.tmp"
        3⤵
          PID:3576
      • C:\Windows\SysWOW64\WindowsInput.exe
        "C:\Windows\SysWOW64\WindowsInput.exe" --install
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        PID:512
      • C:\Program Files\Common Files\System\HD Audio\HDAudio.exe
        "C:\Program Files\Common Files\System\HD Audio\HDAudio.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 SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3564
        • C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe
          "C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe" /launchSelfAndExit "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe" 3564
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2296
          • C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe
            "C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe" /watchProcess "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe" 3564
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4812
    • C:\Windows\SysWOW64\WindowsInput.exe
      "C:\Windows\SysWOW64\WindowsInput.exe"
      1⤵
      • Executes dropped EXE
      PID:4028
    • C:\Program Files\Common Files\System\HD Audio\HDAudio.exe
      "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"
      1⤵
      • Executes dropped EXE
      PID:3412

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files\Common Files\System\HD Audio\HDAudio.exe

      Filesize

      924KB

      MD5

      62d70f8671fd2008fc9f0e17d57d809c

      SHA1

      8b743631a6ea12f7c00a3b586ebdc4e81d0cd892

      SHA256

      5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d

      SHA512

      58bf0a6e47079c3d38380966ac5216249e6eadff1c4d867cf72af1becde10de3ce5e75a4b0b59e832ab4983b65f1af1cd8c855620b744c33aee3c55debee14f4

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

      Filesize

      425B

      MD5

      4eaca4566b22b01cd3bc115b9b0b2196

      SHA1

      e743e0792c19f71740416e7b3c061d9f1336bf94

      SHA256

      34ba0ab8d1850e7825763f413142a333ccbc05fa2b5499a28a7d27b8a1c5b4bb

      SHA512

      bc2b1bf45203e3bb3009a7d37617b8f0f7ffa613680b32de2b963e39d2cf1650614d7035a0cf78f35a4f5cb17a2a439e2e07deaefd2a4275a62efd0a5c0184a1

    • C:\Users\Admin\AppData\Local\Temp\8xzrb__n.dll

      Filesize

      76KB

      MD5

      4c548d010675be10fa11c1d48f962f68

      SHA1

      0d2d5aa902c667bb303fa1954a88713a4691bd85

      SHA256

      0b2df40992a87bb7cf06abdcdf5d5fb053e8608282f38e998d4656682bb25d79

      SHA512

      f98b61cbfafc29c947e15480b04267448ffc5e21dfa1345d8efb2c920d31950fb5b7bab6409b7c8c64b8122d985e85f5f4a1207e9dbe22e6c9853dddd742e18e

    • C:\Users\Admin\AppData\Local\Temp\RES93D5.tmp

      Filesize

      1KB

      MD5

      18877f70c61da96989e05432eaa3de31

      SHA1

      00921640b68ff4b38da389a527b717a8244b7813

      SHA256

      5643791a5356bba906b729bed2074ab3e5302872eabf6c505f49cead2774ab85

      SHA512

      909d2cc920a2f35e478b758bf7ff4a0a99bd9c19dbef92b7d785eec105f6d3f9ca489933680428b876d1f2ebb00481b8b333f791b43968d39a93b1fd3284d7a6

    • C:\Users\Admin\AppData\Roaming\HDAudioDriver\err_979c2ee9d7ff48d0a2e4e2df3c2c864d.dat

      Filesize

      1KB

      MD5

      d20362a73dadaa326ffaf7169be0e4bf

      SHA1

      40a65adc63b4a53ad50f9999731ac320d166fa97

      SHA256

      d35d4d70ece37f3ec16adbc2402c77e16332ea4ed60b1c4dee0cc7dd71f77c04

      SHA512

      507a6d19711259761a3642bfbbd27ed330d2bd1c63c38fa3d6e07ace73e72347a3eae1c63aead05bebc327dbaa3a1015e6b32d69b90b03993661bc17b45e73ec

    • C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.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

    • \??\c:\Users\Admin\AppData\Local\Temp\8xzrb__n.0.cs

      Filesize

      208KB

      MD5

      0e19990a9552aa36b90f01e52761f7fa

      SHA1

      0dec5bf4ee18a2bc49435cbfa490d59d9c780e86

      SHA256

      5096c3adf65e995cfd98c90c3b00011401d9e438021586b7f54f0d5a697ead96

      SHA512

      65feaace4aeef3398371847040220a7945310d7b1c00b5527aa674c6f8853dfc02d7edece21f9c75f8b680e6c0c385bd05c67cf776a758e6abd24714bff888ef

    • \??\c:\Users\Admin\AppData\Local\Temp\8xzrb__n.cmdline

      Filesize

      349B

      MD5

      4c5895a8785e3665594f7f2aaf46ea33

      SHA1

      e87379a0f7bdd2560da8604c3f02a86af017fb01

      SHA256

      9778bd1f90b2f665328d6857bdd315b4f7894eac02df63b3372b664b3d8c56ff

      SHA512

      93e07323ce06db90a03ffa95ff4a5e0e824c7b148feab989c604affa313b43e29ce448356bd52af35292f0f8bcf97d6d2cfb4f5687472e25ea3c2826248e224e

    • \??\c:\Users\Admin\AppData\Local\Temp\CSC93D4.tmp

      Filesize

      676B

      MD5

      7fcffe8f30701c0a13aa9dfb4f92cdc9

      SHA1

      f83dd5324d61f6dcf06822e9cdc8b233bf44c8ef

      SHA256

      6c1ab82816615efd206d0929bfb1b28740fdeb3a24d5ad3b72ce149cd0ee6b9c

      SHA512

      aa3660cedaab773c404b57b22e59a51cecfb516ace5c0c580cf9a534c5745b7f6a5a09755043634fa8508e28c626e3f6f8082b2c4d84ecb06d4079e097eba7e9

    • memory/512-53-0x0000000002260000-0x0000000002272000-memory.dmp

      Filesize

      72KB

    • memory/512-54-0x000000001ADB0000-0x000000001ADEC000-memory.dmp

      Filesize

      240KB

    • memory/512-51-0x00007FF8A5283000-0x00007FF8A5285000-memory.dmp

      Filesize

      8KB

    • memory/512-52-0x00000000001C0000-0x00000000001CC000-memory.dmp

      Filesize

      48KB

    • memory/2296-98-0x0000000000AD0000-0x0000000000AD8000-memory.dmp

      Filesize

      32KB

    • memory/2456-16-0x00007FF8A8690000-0x00007FF8A9031000-memory.dmp

      Filesize

      9.6MB

    • memory/2456-21-0x00007FF8A8690000-0x00007FF8A9031000-memory.dmp

      Filesize

      9.6MB

    • memory/3528-32-0x000000001E5E0000-0x000000001E629000-memory.dmp

      Filesize

      292KB

    • memory/3528-23-0x000000001D1D0000-0x000000001D1E6000-memory.dmp

      Filesize

      88KB

    • memory/3528-30-0x000000001E4E0000-0x000000001E5D0000-memory.dmp

      Filesize

      960KB

    • memory/3528-31-0x000000001D720000-0x000000001D73E000-memory.dmp

      Filesize

      120KB

    • memory/3528-0-0x00007FF8A8945000-0x00007FF8A8946000-memory.dmp

      Filesize

      4KB

    • memory/3528-33-0x00007FF8A8690000-0x00007FF8A9031000-memory.dmp

      Filesize

      9.6MB

    • memory/3528-34-0x000000001E6C0000-0x000000001E730000-memory.dmp

      Filesize

      448KB

    • memory/3528-35-0x00007FF8A8690000-0x00007FF8A9031000-memory.dmp

      Filesize

      9.6MB

    • memory/3528-37-0x000000001E990000-0x000000001E9B0000-memory.dmp

      Filesize

      128KB

    • memory/3528-28-0x000000001D5C0000-0x000000001D622000-memory.dmp

      Filesize

      392KB

    • memory/3528-26-0x00000000018D0000-0x00000000018D8000-memory.dmp

      Filesize

      32KB

    • memory/3528-27-0x000000001BEC0000-0x000000001BEC8000-memory.dmp

      Filesize

      32KB

    • memory/3528-25-0x000000001BE30000-0x000000001BE42000-memory.dmp

      Filesize

      72KB

    • memory/3528-29-0x000000001DF20000-0x000000001E4DA000-memory.dmp

      Filesize

      5.7MB

    • memory/3528-8-0x000000001CB20000-0x000000001CBBC000-memory.dmp

      Filesize

      624KB

    • memory/3528-1-0x00007FF8A8690000-0x00007FF8A9031000-memory.dmp

      Filesize

      9.6MB

    • memory/3528-7-0x000000001C5B0000-0x000000001CA7E000-memory.dmp

      Filesize

      4.8MB

    • memory/3528-2-0x000000001BED0000-0x000000001BF2C000-memory.dmp

      Filesize

      368KB

    • memory/3528-76-0x00007FF8A8690000-0x00007FF8A9031000-memory.dmp

      Filesize

      9.6MB

    • memory/3528-6-0x00007FF8A8690000-0x00007FF8A9031000-memory.dmp

      Filesize

      9.6MB

    • memory/3528-5-0x000000001C0B0000-0x000000001C0BE000-memory.dmp

      Filesize

      56KB

    • memory/3564-80-0x000000001B9B0000-0x000000001B9FE000-memory.dmp

      Filesize

      312KB

    • memory/3564-82-0x000000001BD40000-0x000000001BD58000-memory.dmp

      Filesize

      96KB

    • memory/3564-83-0x000000001C0D0000-0x000000001C292000-memory.dmp

      Filesize

      1.8MB

    • memory/3564-84-0x000000001BE60000-0x000000001BE70000-memory.dmp

      Filesize

      64KB

    • memory/3564-77-0x00000000027C0000-0x00000000027D2000-memory.dmp

      Filesize

      72KB

    • memory/3564-75-0x0000000000540000-0x000000000062E000-memory.dmp

      Filesize

      952KB

    • memory/4028-59-0x000000001ADF0000-0x000000001AEFA000-memory.dmp

      Filesize

      1.0MB