Overview

overview

10

Static

static

10

Umbral.exe

windows10-2004-x64

10

Resubmissions

03-07-2024 14:55

240703-sah7astgqh 10

03-07-2024 14:54

240703-r94rlstgpb 10

Analysis

  • max time kernel
    71s
  • max time network
    68s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-07-2024 14:55

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General

  • Target

    Umbral.exe

  • Size

    229KB

  • MD5

    1c34c800baf35d1e3434531040d07139

  • SHA1

    c483bf994bc40f2f66dd3767df3c327c205301ee

  • SHA256

    7faa7dc741f6cbee158e99306c59f254e878236501f8cca5d6c29ed2c2029f2a

  • SHA512

    6f30a725e7eb759af2fdadfa10edf8daecd3c4c129571308db55cc19f969bac3f4ddd350d1831ca8f9eb1b7471617de9750b3aba92559299f1c688be2fccad07

  • SSDEEP

    6144:lloZM+rIkd8g+EtXHkv/iD4ZfcHzZqStTY5rWWDPzb8e1mMti:noZtL+EP8ZfcHzZqStTY5rWWDvdk

Score
10/10
umbralexecutionspywarestealer

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

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

    stealerumbral
  • 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.

    execution
  • 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.

    spywarestealer
  • 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 registry class 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\Umbral.exe
    "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1544
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:5072
    • C:\Windows\SYSTEM32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
      2⤵
      • Views/modifies file attributes
      PID:1832
    • 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:4664
    • 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:1564
    • 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:1284
    • 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:3104
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1164
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:3192
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:3636
        • 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:4252
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:4916
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1968
          • C:\Windows\system32\PING.EXE
            ping localhost
            3⤵
            • Runs ping.exe
            PID:2236
      • C:\Windows\system32\taskmgr.exe
        "C:\Windows\system32\taskmgr.exe" /4
        1⤵
        • Checks SCSI registry key(s)
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:4580
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:2860

        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

          Download Submit

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

          944B

          MD5

          77d622bb1a5b250869a3238b9bc1402b

          SHA1

          d47f4003c2554b9dfc4c16f22460b331886b191b

          SHA256

          f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

          SHA512

          d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

          Download Submit

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

          948B

          MD5

          966914e2e771de7a4a57a95b6ecfa8a9

          SHA1

          7a32282fd51dd032967ed4d9a40cc57e265aeff2

          SHA256

          98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

          SHA512

          dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

          Download Submit

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

          1KB

          MD5

          276798eeb29a49dc6e199768bc9c2e71

          SHA1

          5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

          SHA256

          cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

          SHA512

          0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

          Download Submit

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

          1KB

          MD5

          ec79fae4e7c09310ebf4f2d85a33a638

          SHA1

          f2bdd995b12e65e7ed437d228f22223b59e76efb

          SHA256

          e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

          SHA512

          af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

          Download Submit

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0ricmajr.lmp.ps1
          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          Download Submit

        • memory/1544-90-0x00007FFE98210000-0x00007FFE98CD1000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/1544-0-0x00007FFE98213000-0x00007FFE98215000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1544-72-0x000001D0518B0000-0x000001D0518C2000-memory.dmp

          Filesize

          72KB

          Download

        • memory/1544-71-0x000001D039020000-0x000001D03902A000-memory.dmp

          Filesize

          40KB

          Download

        • memory/1544-2-0x00007FFE98210000-0x00007FFE98CD1000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/1544-33-0x000001D051930000-0x000001D0519A6000-memory.dmp

          Filesize

          472KB

          Download

        • memory/1544-34-0x000001D0519B0000-0x000001D051A00000-memory.dmp

          Filesize

          320KB

          Download

        • memory/1544-35-0x000001D051A20000-0x000001D051A3E000-memory.dmp

          Filesize

          120KB

          Download

        • memory/1544-1-0x000001D037190000-0x000001D0371D0000-memory.dmp

          Filesize

          256KB

          Download

        • memory/4580-92-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-101-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-97-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-98-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-99-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-93-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-100-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-91-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-103-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4580-102-0x00000215CFB40000-0x00000215CFB41000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4664-18-0x00007FFE98210000-0x00007FFE98CD1000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/4664-9-0x00007FFE98210000-0x00007FFE98CD1000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/4664-8-0x000002124A570000-0x000002124A592000-memory.dmp

          Filesize

          136KB

          Download

        • memory/4664-14-0x00007FFE98210000-0x00007FFE98CD1000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/4664-15-0x00007FFE98210000-0x00007FFE98CD1000-memory.dmp

          Filesize

          10.8MB

          Download