Analysis

  • max time kernel
    157s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-03-2023 14:41

General

  • Target

    131607fdc98a5a6005a3e2ed447a9a646a2b5fd37d0d69d19bc6ff446712d69e.exe

  • Size

    910KB

  • MD5

    c7fdf7d3486fad12c07ac3a3da853fca

  • SHA1

    4f1239e364ba469d8252dd17c25fdfc2f096eb65

  • SHA256

    131607fdc98a5a6005a3e2ed447a9a646a2b5fd37d0d69d19bc6ff446712d69e

  • SHA512

    7d8cc340b3e2d059744457d95ecea7e4f1f6a80be508a86125a418782da5b06bd62106a44830825b9fda501bd6c4099487729d3120c111a60766e2bee5890292

  • SSDEEP

    24576:keu4MROxnFf3xsPekrZlI0AilFEvxHith4:ketMidsrZlI0AilFEvxHit

Malware Config

Extracted

Family

orcus

C2

45.81.39.83:3456

Mutex

4912f043b8a245f39167b534cb611529

Attributes
  • autostart_method

    Registry

  • enable_keylogger

    false

  • install_path

    %programfiles%\Orcus\Orcus.exe

  • reconnect_delay

    10000

  • registry_keyname

    Orcus

  • taskscheduler_taskname

    Orcus

  • watchdog_path

    AppData\OrcusWatchdog.exe

Signatures

  • Orcus

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

  • Orcus main payload 4 IoCs
  • Orcurs Rat Executable 5 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 2 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). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 12 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\131607fdc98a5a6005a3e2ed447a9a646a2b5fd37d0d69d19bc6ff446712d69e.exe
    "C:\Users\Admin\AppData\Local\Temp\131607fdc98a5a6005a3e2ed447a9a646a2b5fd37d0d69d19bc6ff446712d69e.exe"
    1⤵
    • Checks computer location settings
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:2776
    • 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\weilgybo.cmdline"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1564
      • 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\RESDAE5.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCDAE4.tmp"
        3⤵
          PID:716
      • C:\Program Files\Orcus\Orcus.exe
        "C:\Program Files\Orcus\Orcus.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 WriteProcessMemory
        PID:3348
        • C:\Users\Admin\AppData\Roaming\OrcusWatchdog.exe
          "C:\Users\Admin\AppData\Roaming\OrcusWatchdog.exe" /launchSelfAndExit "C:\Program Files\Orcus\Orcus.exe" 3348 /protectFile
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2280
          • C:\Users\Admin\AppData\Roaming\OrcusWatchdog.exe
            "C:\Users\Admin\AppData\Roaming\OrcusWatchdog.exe" /watchProcess "C:\Program Files\Orcus\Orcus.exe" 3348 "/protectFile"
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4340
    • C:\Program Files\Orcus\Orcus.exe
      "C:\Program Files\Orcus\Orcus.exe"
      1⤵
      • Executes dropped EXE
      PID:2856

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      910KB

      MD5

      c7fdf7d3486fad12c07ac3a3da853fca

      SHA1

      4f1239e364ba469d8252dd17c25fdfc2f096eb65

      SHA256

      131607fdc98a5a6005a3e2ed447a9a646a2b5fd37d0d69d19bc6ff446712d69e

      SHA512

      7d8cc340b3e2d059744457d95ecea7e4f1f6a80be508a86125a418782da5b06bd62106a44830825b9fda501bd6c4099487729d3120c111a60766e2bee5890292

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

      Filesize

      910KB

      MD5

      c7fdf7d3486fad12c07ac3a3da853fca

      SHA1

      4f1239e364ba469d8252dd17c25fdfc2f096eb65

      SHA256

      131607fdc98a5a6005a3e2ed447a9a646a2b5fd37d0d69d19bc6ff446712d69e

      SHA512

      7d8cc340b3e2d059744457d95ecea7e4f1f6a80be508a86125a418782da5b06bd62106a44830825b9fda501bd6c4099487729d3120c111a60766e2bee5890292

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

      Filesize

      910KB

      MD5

      c7fdf7d3486fad12c07ac3a3da853fca

      SHA1

      4f1239e364ba469d8252dd17c25fdfc2f096eb65

      SHA256

      131607fdc98a5a6005a3e2ed447a9a646a2b5fd37d0d69d19bc6ff446712d69e

      SHA512

      7d8cc340b3e2d059744457d95ecea7e4f1f6a80be508a86125a418782da5b06bd62106a44830825b9fda501bd6c4099487729d3120c111a60766e2bee5890292

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

      Filesize

      910KB

      MD5

      c7fdf7d3486fad12c07ac3a3da853fca

      SHA1

      4f1239e364ba469d8252dd17c25fdfc2f096eb65

      SHA256

      131607fdc98a5a6005a3e2ed447a9a646a2b5fd37d0d69d19bc6ff446712d69e

      SHA512

      7d8cc340b3e2d059744457d95ecea7e4f1f6a80be508a86125a418782da5b06bd62106a44830825b9fda501bd6c4099487729d3120c111a60766e2bee5890292

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

      Filesize

      357B

      MD5

      a2b76cea3a59fa9af5ea21ff68139c98

      SHA1

      35d76475e6a54c168f536e30206578babff58274

      SHA256

      f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

      SHA512

      b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

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

      Filesize

      425B

      MD5

      4eaca4566b22b01cd3bc115b9b0b2196

      SHA1

      e743e0792c19f71740416e7b3c061d9f1336bf94

      SHA256

      34ba0ab8d1850e7825763f413142a333ccbc05fa2b5499a28a7d27b8a1c5b4bb

      SHA512

      bc2b1bf45203e3bb3009a7d37617b8f0f7ffa613680b32de2b963e39d2cf1650614d7035a0cf78f35a4f5cb17a2a439e2e07deaefd2a4275a62efd0a5c0184a1

    • C:\Users\Admin\AppData\Local\Temp\RESDAE5.tmp

      Filesize

      1KB

      MD5

      e4e356004aadde288329e5ebeee52f2c

      SHA1

      972d2e92fb078e478a2a63fb60dabae2d5e14f8b

      SHA256

      798afa3405b9b35dfb022b0fe36e191a04d2af3eaf6404358d0fae0b86e8bd28

      SHA512

      dc1469c3426f0ec6bf75277232098c43eda3ded1e9eabad93e54c4793b9e1ecb9991103c53ac6da7a50025b11978d7a5e9eb63579ea6178b250cd8349572f9ee

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

      Filesize

      76KB

      MD5

      5f19a73383e5f3b22cb358dc5006b461

      SHA1

      6a6969eb918e217867f42a99e8a13966f5aeca3b

      SHA256

      f21a12372ac74f4c53b88ada333b8a356aec083dae2654af207a188f04decdf8

      SHA512

      e931a6a4a2c3e7ffb37eb70c3ee98e41b1dd891177a3ef8d1bed7c4ecaa535056cf9a71659c4a957c2aec82d643c303ccc4ee7f18718787dad0c0d094529ec66

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

      Filesize

      9KB

      MD5

      913967b216326e36a08010fb70f9dba3

      SHA1

      7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

      SHA256

      8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

      SHA512

      c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

      Filesize

      9KB

      MD5

      913967b216326e36a08010fb70f9dba3

      SHA1

      7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

      SHA256

      8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

      SHA512

      c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

      Filesize

      9KB

      MD5

      913967b216326e36a08010fb70f9dba3

      SHA1

      7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

      SHA256

      8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

      SHA512

      c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

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

      Filesize

      9KB

      MD5

      913967b216326e36a08010fb70f9dba3

      SHA1

      7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

      SHA256

      8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

      SHA512

      c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

    • C:\Users\Admin\AppData\Roaming\OrcusWatchdog.exe.config

      Filesize

      357B

      MD5

      a2b76cea3a59fa9af5ea21ff68139c98

      SHA1

      35d76475e6a54c168f536e30206578babff58274

      SHA256

      f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

      SHA512

      b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

    • \??\c:\Users\Admin\AppData\Local\Temp\CSCDAE4.tmp

      Filesize

      676B

      MD5

      7775a9f70a00eb27afecfaa71d6c3773

      SHA1

      279bb6e7928687ce48654b8ace6ecd6193056281

      SHA256

      5c059489cc0df4744288e9db4a6d64518c4547d13e4ede9be51f9043867e6bff

      SHA512

      4a0313199e4c31a7cebda4ea3700cad3cb048222ee31b076b55b54ac35e2595afe118688e500f12207a7e6f0da94a24cf7d884d16a310296bd3bf422c2de7fda

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

      Filesize

      208KB

      MD5

      6962e84ed3acc6c36c6fd65fd2e59851

      SHA1

      bd58954739667c48c4390aae5b2348bc8f97c11c

      SHA256

      a0b33a459c0af382a96418297229bd9fcc23e197da64c1e4a9ffad2f31bf14de

      SHA512

      161f81a6cf0e382efe8b52f39884540e95635d6ac7677044a4f9968a7fccc7059ee4c842424804dddb451a9d43f716e5301d10071a932cd7fc84608fa2b113d5

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

      Filesize

      349B

      MD5

      014dce9b051a82e538bf171af667db27

      SHA1

      06ff9c74698de9a9f07628eb53449ad39c2935f2

      SHA256

      ffec394c4937b67dfe067c011da9205898a47465e6c12f6bc1a3edd951de2975

      SHA512

      dd0eb9ebfe6adec2a62b18d3393362c5e4372f8e945850ce9355ef2e43d0d441933083d4ab9a281261fa9cfd4600eac797dcd52f35c6b524e263a317679bdc98

    • memory/1564-148-0x0000000002410000-0x0000000002420000-memory.dmp

      Filesize

      64KB

    • memory/2280-188-0x0000000000790000-0x0000000000798000-memory.dmp

      Filesize

      32KB

    • memory/2776-135-0x000000001BFF0000-0x000000001C04C000-memory.dmp

      Filesize

      368KB

    • memory/2776-154-0x000000001C110000-0x000000001C126000-memory.dmp

      Filesize

      88KB

    • memory/2776-139-0x000000001D140000-0x000000001D60E000-memory.dmp

      Filesize

      4.8MB

    • memory/2776-134-0x0000000000F40000-0x000000000102A000-memory.dmp

      Filesize

      936KB

    • memory/2776-138-0x000000001C0D0000-0x000000001C0DE000-memory.dmp

      Filesize

      56KB

    • memory/2776-140-0x000000001D6B0000-0x000000001D74C000-memory.dmp

      Filesize

      624KB

    • memory/2776-133-0x0000000001A30000-0x0000000001A40000-memory.dmp

      Filesize

      64KB

    • memory/2776-157-0x00000000019F0000-0x00000000019F8000-memory.dmp

      Filesize

      32KB

    • memory/2776-156-0x0000000001A10000-0x0000000001A22000-memory.dmp

      Filesize

      72KB

    • memory/3348-172-0x0000000000770000-0x0000000000780000-memory.dmp

      Filesize

      64KB

    • memory/3348-176-0x0000000000770000-0x0000000000780000-memory.dmp

      Filesize

      64KB

    • memory/3348-192-0x000000001CB20000-0x000000001CB32000-memory.dmp

      Filesize

      72KB

    • memory/3348-193-0x000000001CB80000-0x000000001CBBC000-memory.dmp

      Filesize

      240KB

    • memory/3348-194-0x000000001CCD0000-0x000000001CDDA000-memory.dmp

      Filesize

      1.0MB

    • memory/3348-195-0x000000001CFB0000-0x000000001D172000-memory.dmp

      Filesize

      1.8MB

    • memory/3348-197-0x0000000000770000-0x0000000000780000-memory.dmp

      Filesize

      64KB

    • memory/3348-198-0x0000000000770000-0x0000000000780000-memory.dmp

      Filesize

      64KB