Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    12-01-2025 03:25

General

  • Target

    resembleC2.exe

  • Size

    763KB

  • MD5

    f70fb0eacdba5672bd67ff9ad29e425b

  • SHA1

    35c7ad26473afb12c8b46dfb51f3e0d73b92a7eb

  • SHA256

    325ec7369a18af43c95815bacf830f5bcd1093436c25f67685226fe0d4812280

  • SHA512

    e93012796de946c4b009d9c68a539ea010d88952c11ddd0fc05d3d4ebe1657f16a7f75269e2c6075c12564f40752c7f4aec0c64583ffb46d06ec69431e5f6ff5

  • SSDEEP

    12288:wjB1GbyBRc8nAVCCpViLkSdIi/NvFFuHtHylX5mmYKlzQUG1R9qRst2hmKyL/mVD:wjB1myBRccwf/SdNFvFFu1yh5zlzY1RS

Malware Config

Signatures

  • Detect Umbral payload 2 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
  • Executes dropped EXE 3 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Drops desktop.ini file(s) 2 IoCs
  • 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.

  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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.

  • Modifies registry class 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\resembleC2.exe
    "C:\Users\Admin\AppData\Local\Temp\resembleC2.exe"
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1688
    • C:\Users\Admin\AppData\Local\Temp\resemble.exe
      "C:\Users\Admin\AppData\Local\Temp\resemble.exe"
      2⤵
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4048
      • C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:3556
    • C:\Users\Admin\AppData\Local\Temp\MoonHub.exe
      "C:\Users\Admin\AppData\Local\Temp\MoonHub.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2412
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:4004
      • C:\Windows\SYSTEM32\attrib.exe
        "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\MoonHub.exe"
        3⤵
        • Views/modifies file attributes
        PID:2824
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\MoonHub.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1656
      • 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
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1068
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3144
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2744
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3712
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
          PID:2976
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
            PID:3600
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            PID:2380
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic" path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:4808
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\MoonHub.exe" && pause
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Suspicious use of WriteProcessMemory
            PID:5000
            • C:\Windows\system32\PING.EXE
              ping localhost
              4⤵
              • System Network Configuration Discovery: Internet Connection Discovery
              • Runs ping.exe
              PID:392
      • C:\Windows\system32\OpenWith.exe
        C:\Windows\system32\OpenWith.exe -Embedding
        1⤵
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:2764

      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

        627073ee3ca9676911bee35548eff2b8

        SHA1

        4c4b68c65e2cab9864b51167d710aa29ebdcff2e

        SHA256

        85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

        SHA512

        3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

        Filesize

        1KB

        MD5

        7332074ae2b01262736b6fbd9e100dac

        SHA1

        22f992165065107cc9417fa4117240d84414a13c

        SHA256

        baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

        SHA512

        4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

        Filesize

        1KB

        MD5

        9b2acf080a432c89852a69291f7fe29e

        SHA1

        86df0be9e718ae80e6e6064f52b7d60a98f2725d

        SHA256

        126f1d64010a2da8956f4deb3980f19ec01d48693054efd7b8b38ff62209b927

        SHA512

        a4fd1da4c1a9c8e072f66516da5dae12682eea44473b43d18ae0999b004e19ddbc2294be5d1d3b622a22189e9176a42a5de76229143d30c1649ba7116d17aa27

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

        Filesize

        944B

        MD5

        1a9fa92a4f2e2ec9e244d43a6a4f8fb9

        SHA1

        9910190edfaccece1dfcc1d92e357772f5dae8f7

        SHA256

        0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

        SHA512

        5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

        Filesize

        948B

        MD5

        441a842138038e6385e430a90d7ea608

        SHA1

        7b3712d2cdd37e10ee9b3994131ee5175e920f01

        SHA256

        47592f3324179912d3bdba336b9e75568c2c5f1a9fb37c1ba9f0db9df822164c

        SHA512

        9dbddc3216f2a132ae3961b3aeac2c5b8828dcc9292f6c5bf1171c47453aa8687f92658818d771413492c0ea565e9ede17b9c03e427af9dc2ac21a78369a6666

      • C:\Users\Admin\AppData\Local\Temp\MoonHub.exe

        Filesize

        231KB

        MD5

        f70b5e56a09af292d4e909c547f9c8c0

        SHA1

        577883bdbe8dc9582e15e7a1212b1fe432bafce3

        SHA256

        8fd22c5acb3144dbaa5ab3f9dd5901eb6f3beef67e72ea431246c6a790c067de

        SHA512

        e54ccb56aa6473abd3530493933d5164f2dff02076e0f03443382f02d177a52e318d8d0f432e6a3fb5620eaffd09f2dbf6ccbf9698ba149b149c594fa162d879

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_y3eqt4nn.lj1.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\resemble.exe

        Filesize

        845KB

        MD5

        56edb111575113d40af0f1c028dcb315

        SHA1

        018a7abc977ba73e2f66f1e7bf041191089c100c

        SHA256

        c7b542ac39e8e5a14ef0cd70dc3bb505cbdbef4d737c7cb310353642ca914235

        SHA512

        2c87ad1db2ce3745426eb47e76b855124e97747d895d8f5b90adf9018a03c6059dc96537429cf03e2d9af51ca49b751c418820d7a27557e33b8ef54f7305c406

      • memory/1656-57-0x00000264D7D00000-0x00000264D7D22000-memory.dmp

        Filesize

        136KB

      • memory/1688-34-0x00007FFA8C7B0000-0x00007FFA8D272000-memory.dmp

        Filesize

        10.8MB

      • memory/1688-0-0x00007FFA8C7B3000-0x00007FFA8C7B5000-memory.dmp

        Filesize

        8KB

      • memory/1688-10-0x00007FFA8C7B0000-0x00007FFA8D272000-memory.dmp

        Filesize

        10.8MB

      • memory/1688-1-0x0000000000E50000-0x0000000000F16000-memory.dmp

        Filesize

        792KB

      • memory/2412-110-0x0000021824E40000-0x0000021824E4A000-memory.dmp

        Filesize

        40KB

      • memory/2412-31-0x000002180A920000-0x000002180A960000-memory.dmp

        Filesize

        256KB

      • memory/2412-111-0x00000218251C0000-0x00000218251D2000-memory.dmp

        Filesize

        72KB

      • memory/2412-73-0x0000021825110000-0x0000021825186000-memory.dmp

        Filesize

        472KB

      • memory/2412-74-0x0000021824E50000-0x0000021824EA0000-memory.dmp

        Filesize

        320KB

      • memory/2412-75-0x0000021824E20000-0x0000021824E3E000-memory.dmp

        Filesize

        120KB

      • memory/4048-17-0x0000000074610000-0x0000000074BC1000-memory.dmp

        Filesize

        5.7MB

      • memory/4048-48-0x0000000074610000-0x0000000074BC1000-memory.dmp

        Filesize

        5.7MB

      • memory/4048-26-0x0000000074610000-0x0000000074BC1000-memory.dmp

        Filesize

        5.7MB

      • memory/4048-16-0x0000000074611000-0x0000000074612000-memory.dmp

        Filesize

        4KB