Analysis

  • max time kernel
    260s
  • max time network
    266s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-06-2024 21:53

General

  • Target

    setup.exe

  • Size

    73KB

  • MD5

    9003126cef8cf36eca17f1e51eaf8394

  • SHA1

    6f7941dc4c5bb1818a519482537ea231e4ba8ab8

  • SHA256

    ac30d7a03c46c90f1f8270ac6dc2a7001373b2b16567d7753f174fd33c047ed2

  • SHA512

    eacfc7a4030cbaab1926d660b5ea2fa69d9ba2e18bb690822bab474b9fb296d49150af25a8565dd51ad3a4d4da648e365610969829835d480fce4e16b0285dac

  • SSDEEP

    1536:mPN8fc4tabwG764lxyTfogb8cCijEnxH8w6nNOON3c7G:UN8f9abwGLHyZb876qWVNOON6G

Malware Config

Extracted

Family

xworm

C2

sebeee-39917.portmap.io:39917

Attributes
  • Install_directory

    %AppData%

  • install_file

    RuntimeBroker.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 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\setup.exe
    "C:\Users\Admin\AppData\Local\Temp\setup.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4060
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\setup.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2000
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'setup.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3276
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2620
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4912
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RuntimeBroker" /tr "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1740
  • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4436
  • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1052
  • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3604
  • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2724

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    654B

    MD5

    2ff39f6c7249774be85fd60a8f9a245e

    SHA1

    684ff36b31aedc1e587c8496c02722c6698c1c4e

    SHA256

    e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

    SHA512

    1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

  • 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

    6d42b6da621e8df5674e26b799c8e2aa

    SHA1

    ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

    SHA256

    5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

    SHA512

    53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

    Filesize

    944B

    MD5

    65a68df1062af34622552c4f644a5708

    SHA1

    6f6ecf7b4b635abb0b132d95dac2759dc14b50af

    SHA256

    718dc2f5f4a6dbb7fab7f3db05bd7f602fb16526caae7084ab46c3ab4e7bad35

    SHA512

    4e460eb566032942547b58411222dd26ae300a95f83cf5ae6df58ebd28594341123611b348bd4031a33bc7f38307d5cb8fb677bba8c896919e3eee677a104d4d

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

    Filesize

    944B

    MD5

    92075279f2dbcaa5724ee5a47e49712f

    SHA1

    8dd3e2faa8432dde978946ebaf9054f7c6e0b2cb

    SHA256

    fd985ddd090621af25aa77aebff689c95ea7679ff0e81887124b2802ae3e9442

    SHA512

    744c62556233d9872f43ffb5a5a98aee20a44834436306f0a948c8c4072bdb46ef8044616593747edd645caaee60faf8b14fedb2d6df5f6019b5c73357d80d22

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1yoxs4at.ovv.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    73KB

    MD5

    9003126cef8cf36eca17f1e51eaf8394

    SHA1

    6f7941dc4c5bb1818a519482537ea231e4ba8ab8

    SHA256

    ac30d7a03c46c90f1f8270ac6dc2a7001373b2b16567d7753f174fd33c047ed2

    SHA512

    eacfc7a4030cbaab1926d660b5ea2fa69d9ba2e18bb690822bab474b9fb296d49150af25a8565dd51ad3a4d4da648e365610969829835d480fce4e16b0285dac

  • memory/2000-4-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

    Filesize

    10.8MB

  • memory/2000-18-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

    Filesize

    10.8MB

  • memory/2000-6-0x000001B9A80A0000-0x000001B9A80C2000-memory.dmp

    Filesize

    136KB

  • memory/2000-5-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

    Filesize

    10.8MB

  • memory/2000-3-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

    Filesize

    10.8MB

  • memory/4060-0-0x00007FFDE63E3000-0x00007FFDE63E5000-memory.dmp

    Filesize

    8KB

  • memory/4060-57-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

    Filesize

    10.8MB

  • memory/4060-2-0x00007FFDE63E0000-0x00007FFDE6EA1000-memory.dmp

    Filesize

    10.8MB

  • memory/4060-1-0x00000000008F0000-0x0000000000908000-memory.dmp

    Filesize

    96KB