Analysis

  • max time kernel
    15s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    20-09-2024 10:30

General

  • Target

    upx.exe

  • Size

    231KB

  • MD5

    88b64c5cad0453a14347d415f9d4f82b

  • SHA1

    4a613e651418497885bf4861dc27fee379eee1b9

  • SHA256

    f7f74aeaf94b242f73f0417796f4814c1a857eaa246ebcb7a667643d90af938e

  • SHA512

    56775a3ce0c99998c0354a5d7485fbaf01e83f247412849abd2d81461decf0e9c4fa095d43e18be74fe7225df2b6cbbc2f98f4abf5611192ef66d83abee2d7d2

  • SSDEEP

    6144:bloZM+rIkd8g+EtXHkv/iD4irHJzZqStHY5rWWDIPb8e1m4i:5oZtL+EP8irHJzZqStHY5rWWD2y

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

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

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • 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 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.

  • 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\upx.exe
    "C:\Users\Admin\AppData\Local\Temp\upx.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2072
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2936
    • C:\Windows\system32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\upx.exe"
      2⤵
      • Views/modifies file attributes
      PID:2920
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\upx.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2776
    • 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:2892
    • 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:2268
    • 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:2796
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2680
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:292
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:1204
        • 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:1768
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:2220
        • C:\Windows\system32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\upx.exe" && pause
          2⤵
          • Deletes itself
          • System Network Configuration Discovery: Internet Connection Discovery
          • Suspicious use of WriteProcessMemory
          PID:2204
          • C:\Windows\system32\PING.EXE
            ping localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:3020

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\MLKRDKP0DIALPVPKUF8M.temp

        Filesize

        7KB

        MD5

        f0ec9b96671503e565d874a9e426aeb1

        SHA1

        1552b0f7d13316bbe2a0f5f8de13410593968de9

        SHA256

        400761b135aacfaebe29a7aa798aa6b78f50bb11ce26bbd9d081288f08fad264

        SHA512

        b8fadafe032700a34f154ced2acddc178a360fb785f75cc585db31b27565ee7e86fd8817a84f5c619989dca054a1968243463c68e92739d7cbbf002f99cac312

      • memory/1768-43-0x0000000001F40000-0x0000000001F48000-memory.dmp

        Filesize

        32KB

      • memory/2072-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

        Filesize

        4KB

      • memory/2072-1-0x00000000002D0000-0x0000000000310000-memory.dmp

        Filesize

        256KB

      • memory/2072-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

        Filesize

        9.9MB

      • memory/2072-47-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

        Filesize

        9.9MB

      • memory/2776-7-0x000000001B510000-0x000000001B7F2000-memory.dmp

        Filesize

        2.9MB

      • memory/2776-8-0x00000000021D0000-0x00000000021D8000-memory.dmp

        Filesize

        32KB

      • memory/2892-14-0x000000001B5B0000-0x000000001B892000-memory.dmp

        Filesize

        2.9MB

      • memory/2892-15-0x00000000026E0000-0x00000000026E8000-memory.dmp

        Filesize

        32KB