Analysis

  • max time kernel
    149s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250129-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-02-2025 16:10

General

  • Target

    Umbra1l.exe

  • Size

    229KB

  • MD5

    d4b3962331fd69d60450d4bf2a4e082d

  • SHA1

    e0f0a331505e6a6d33886a450365d1412d34ba19

  • SHA256

    6a426a8c30989c1f079a3d13b675eb1cd0c888d353a97e0233c8786fb3c2ab86

  • SHA512

    1273506c488bec41bb3e7da428825a7d39d067a25de8b52a8408623614cdc8894b4a3cfaf1004ec686ceae647224ef3b9021149303b76b5b1266103e6ac0f200

  • SSDEEP

    6144:tloZMmrIkd8g+EtXHkv/iD44zOjlTwk7diTlwsJgbb8e1mci:voZ1L+EP84zOjlTwk7diTlwsJim

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

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

  • Umbral family
  • 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.

  • Drops file in Drivers directory 1 IoCs
  • Reads user/profile data of web browsers 3 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.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Umbra1l.exe
    "C:\Users\Admin\AppData\Local\Temp\Umbra1l.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1048
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3108
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbra1l.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4356
    • 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⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4020
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2740
    • 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:3304
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4588
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:2628
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:4460
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
          2⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          PID:624
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:4476
      • C:\Windows\system32\taskmgr.exe
        "C:\Windows\system32\taskmgr.exe" /4
        1⤵
        • Checks SCSI registry key(s)
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:1868

      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

        944B

        MD5

        6d3e9c29fe44e90aae6ed30ccf799ca8

        SHA1

        c7974ef72264bbdf13a2793ccf1aed11bc565dce

        SHA256

        2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

        SHA512

        60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

        Filesize

        948B

        MD5

        966914e2e771de7a4a57a95b6ecfa8a9

        SHA1

        7a32282fd51dd032967ed4d9a40cc57e265aeff2

        SHA256

        98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

        SHA512

        dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

      • 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

        3462e3d4a965ec2a28a4d97549a4b6af

        SHA1

        88d94753921c27d52069aca4bbcac429a40d618d

        SHA256

        ff21545a780bb731a4034b5a1c32994ac9932d829e0c9f07e6ecde5a8f3cc4f2

        SHA512

        c8bf83dc4cae64b0a51bb8ea00a8df05c1e7d70161f30ea8e5f341598b8d1453e93d6d29aa9fe5053af768df881c8e48f86bf8d8508e958620e490fd5ded6d5e

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_smijmgr2.h21.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/1048-87-0x000001D3FDFD0000-0x000001D3FE0D2000-memory.dmp

        Filesize

        1.0MB

      • memory/1048-88-0x00007FFF76370000-0x00007FFF76E31000-memory.dmp

        Filesize

        10.8MB

      • memory/1048-85-0x00007FFF76373000-0x00007FFF76375000-memory.dmp

        Filesize

        8KB

      • memory/1048-0-0x00007FFF76373000-0x00007FFF76375000-memory.dmp

        Filesize

        8KB

      • memory/1048-105-0x000001D3FDFD0000-0x000001D3FE0D2000-memory.dmp

        Filesize

        1.0MB

      • memory/1048-32-0x000001D3FE3D0000-0x000001D3FE446000-memory.dmp

        Filesize

        472KB

      • memory/1048-33-0x000001D3FE130000-0x000001D3FE180000-memory.dmp

        Filesize

        320KB

      • memory/1048-34-0x000001D3FE450000-0x000001D3FE46E000-memory.dmp

        Filesize

        120KB

      • memory/1048-106-0x00007FFF76370000-0x00007FFF76E31000-memory.dmp

        Filesize

        10.8MB

      • memory/1048-2-0x00007FFF76370000-0x00007FFF76E31000-memory.dmp

        Filesize

        10.8MB

      • memory/1048-70-0x000001D3FE570000-0x000001D3FE57A000-memory.dmp

        Filesize

        40KB

      • memory/1048-71-0x000001D3FE5A0000-0x000001D3FE5B2000-memory.dmp

        Filesize

        72KB

      • memory/1048-1-0x000001D3FBB50000-0x000001D3FBB90000-memory.dmp

        Filesize

        256KB

      • memory/1868-91-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-100-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-95-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-89-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-90-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-96-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-101-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-97-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-99-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/1868-98-0x000001F84F030000-0x000001F84F031000-memory.dmp

        Filesize

        4KB

      • memory/4356-18-0x00007FFF76370000-0x00007FFF76E31000-memory.dmp

        Filesize

        10.8MB

      • memory/4356-14-0x00007FFF76370000-0x00007FFF76E31000-memory.dmp

        Filesize

        10.8MB

      • memory/4356-15-0x00007FFF76370000-0x00007FFF76E31000-memory.dmp

        Filesize

        10.8MB

      • memory/4356-3-0x00007FFF76370000-0x00007FFF76E31000-memory.dmp

        Filesize

        10.8MB

      • memory/4356-9-0x000002753ED20000-0x000002753ED42000-memory.dmp

        Filesize

        136KB