Analysis

  • max time kernel
    93s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-01-2025 04:21

General

  • Target

    CorruptX1.3.exe

  • Size

    495KB

  • MD5

    c57206c732c6cfaa8a4de6495732c8de

  • SHA1

    eb4127b4a20b05a3db766b3c953f0e12eb3070e9

  • SHA256

    0465cfcd8ec390d5d4e321ca1609ee70be881b906754cb5e783201114d922fcf

  • SHA512

    f1205d7c5daaa6b38ec121200875c8355857252ad4d474ce629c8584e73933e050e4f74c968617908044b9e819bc099dab8866e4f065acd4aa0b203001d1a6c9

  • SSDEEP

    6144:vloZM+rIkd8g+EtXHkv/iD4cGiqU69VeGbGkFZw9Xb8e1mqe6i:NoZtL+EP8cGiqU69VeGbGkFZwBLS

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.

  • 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 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CorruptX1.3.exe
    "C:\Users\Admin\AppData\Local\Temp\CorruptX1.3.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3604
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2776
    • C:\Windows\SYSTEM32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\CorruptX1.3.exe"
      2⤵
      • Views/modifies file attributes
      PID:3488
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\CorruptX1.3.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2020
    • 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:5060
    • 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:3212
    • 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:3528
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4384
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:4848
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:4040
        • 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:1280
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:4568
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\CorruptX1.3.exe" && pause
          2⤵
          • System Network Configuration Discovery: Internet Connection Discovery
          • Suspicious use of WriteProcessMemory
          PID:836
          • C:\Windows\system32\PING.EXE
            ping localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:2664

      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

        276798eeb29a49dc6e199768bc9c2e71

        SHA1

        5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

        SHA256

        cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

        SHA512

        0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

        Filesize

        1KB

        MD5

        128b92209197100ce7aff24e1fcb531e

        SHA1

        3333b685091e506aba63a8fa480abcb3e387ca11

        SHA256

        486ea5d4e5a060d5e2b325a29184963117b806eac4c3c8f2054e270977a6a76b

        SHA512

        75aa70ee708b793be9a72a11a6e60c356181bbb93d6c2addd627606974048733f760850f4022926fc0f13b8a7dcdd94cd4b4a5374a0e57d236525649fe7a221f

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_alrisvqc.rzq.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/2020-13-0x0000018EAC830000-0x0000018EAC852000-memory.dmp

        Filesize

        136KB

      • memory/2020-14-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

        Filesize

        10.8MB

      • memory/2020-15-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

        Filesize

        10.8MB

      • memory/2020-18-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

        Filesize

        10.8MB

      • memory/2020-3-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

        Filesize

        10.8MB

      • memory/3604-34-0x000001BCFFF90000-0x000001BCFFFE0000-memory.dmp

        Filesize

        320KB

      • memory/3604-33-0x000001BD00080000-0x000001BD000F6000-memory.dmp

        Filesize

        472KB

      • memory/3604-35-0x000001BCFF230000-0x000001BCFF24E000-memory.dmp

        Filesize

        120KB

      • memory/3604-1-0x000001BCFED90000-0x000001BCFEE12000-memory.dmp

        Filesize

        520KB

      • memory/3604-0-0x00007FFFA5FC3000-0x00007FFFA5FC5000-memory.dmp

        Filesize

        8KB

      • memory/3604-68-0x000001BCFF200000-0x000001BCFF20A000-memory.dmp

        Filesize

        40KB

      • memory/3604-69-0x000001BCFF270000-0x000001BCFF282000-memory.dmp

        Filesize

        72KB

      • memory/3604-2-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

        Filesize

        10.8MB

      • memory/3604-87-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

        Filesize

        10.8MB