Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    12-01-2025 03:30

General

  • Target

    resembleC2.exe

  • Size

    763KB

  • MD5

    f70fb0eacdba5672bd67ff9ad29e425b

  • SHA1

    35c7ad26473afb12c8b46dfb51f3e0d73b92a7eb

  • SHA256

    325ec7369a18af43c95815bacf830f5bcd1093436c25f67685226fe0d4812280

  • SHA512

    e93012796de946c4b009d9c68a539ea010d88952c11ddd0fc05d3d4ebe1657f16a7f75269e2c6075c12564f40752c7f4aec0c64583ffb46d06ec69431e5f6ff5

  • SSDEEP

    12288:wjB1GbyBRc8nAVCCpViLkSdIi/NvFFuHtHylX5mmYKlzQUG1R9qRst2hmKyL/mVD:wjB1myBRccwf/SdNFvFFu1yh5zlzY1RS

Malware Config

Extracted

Family

orcus

C2

9across-entitled.gl.at.ply.gg

Mutex

cac3aa9158e541b28ce1c4890a52661d

Attributes
  • administration_rights_required

    false

  • anti_debugger

    false

  • anti_tcp_analyzer

    false

  • antivm

    false

  • autostart_method

    1

  • change_creation_date

    false

  • force_installer_administrator_privileges

    false

  • hide_file

    false

  • install

    false

  • installation_folder

    %appdata%\Microsoft\Speech\AudioDriver.exe

  • installservice

    false

  • keylogger_enabled

    false

  • newcreationdate

    01/12/2025 04:15:11

  • plugins

    AgUFyfihswTdIPqEArukcmEdSF06Hw9CAFMAbwBEACAAUAByAG8AdABlAGMAdABpAG8AbgAHAzEALgAwAEEgNwBkAGUAYQAzAGQAZgBhAGUAZQBjAGEANABjADcAYQA5ADcAZABiAGYAZQBlADUAMQAyADIAMgA1ADYAMgA3AAEFl6aNkQPXkQKOmwKLvFcpr24sKCsVRABpAHMAYQBiAGwAZQAgAFcAZQBiAGMAYQBtACAATABpAGcAaAB0AHMABwMxAC4AMABBIGUANABhADUAZgAzADIANwAzADkANQBjADQAOQA5ADUAYgA3ADgAYQA1ADYAYwBhAGYAMwAzAGIANgAzADQANgABAAAEBA==

  • reconnect_delay

    10000

  • registry_autostart_keyname

    Audio HD Driver

  • registry_hidden_autostart

    false

  • set_admin_flag

    false

  • tasksch_name

    Audio HD Driver

  • tasksch_request_highest_privileges

    false

  • try_other_autostart_onfail

    false

aes.plain

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1326652489054818346/f_cBTMEYAkXYcTbEkW-MUwYrefMORTfuoofsZ5ymJ5yR8BQpohmaCuB-PwAuIP1xAUKw

Signatures

  • Detect Umbral payload 2 IoCs
  • Orcus

    Orcus is a Remote Access Trojan that is being sold on underground forums.

  • Orcus family
  • 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
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 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.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 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 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 24 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 57 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⤵
    • Suspicious use of WriteProcessMemory
    PID:2704
    • C:\Users\Admin\AppData\Local\Temp\resemble.exe
      "C:\Users\Admin\AppData\Local\Temp\resemble.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3028
      • 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:2316
    • C:\Windows\system32\rundll32.exe
      "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\resemble.py
      2⤵
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1508
      • C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
        "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\resemble.py"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        PID:1052
    • 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:2728
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:556
      • C:\Windows\system32\attrib.exe
        "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\MoonHub.exe"
        3⤵
        • Views/modifies file attributes
        PID:2764
      • 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:2840
      • 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:2804
      • 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:772
      • 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:2940
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:960
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
          PID:1180
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
            PID:2396
          • 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:2392
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic" path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:972
          • 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:2056
            • C:\Windows\system32\PING.EXE
              ping localhost
              4⤵
              • System Network Configuration Discovery: Internet Connection Discovery
              • Runs ping.exe
              PID:1848

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        231KB

        MD5

        f70b5e56a09af292d4e909c547f9c8c0

        SHA1

        577883bdbe8dc9582e15e7a1212b1fe432bafce3

        SHA256

        8fd22c5acb3144dbaa5ab3f9dd5901eb6f3beef67e72ea431246c6a790c067de

        SHA512

        e54ccb56aa6473abd3530493933d5164f2dff02076e0f03443382f02d177a52e318d8d0f432e6a3fb5620eaffd09f2dbf6ccbf9698ba149b149c594fa162d879

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

        Filesize

        845KB

        MD5

        56edb111575113d40af0f1c028dcb315

        SHA1

        018a7abc977ba73e2f66f1e7bf041191089c100c

        SHA256

        c7b542ac39e8e5a14ef0cd70dc3bb505cbdbef4d737c7cb310353642ca914235

        SHA512

        2c87ad1db2ce3745426eb47e76b855124e97747d895d8f5b90adf9018a03c6059dc96537429cf03e2d9af51ca49b751c418820d7a27557e33b8ef54f7305c406

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

        Filesize

        27KB

        MD5

        23f1fabaef532d89fcb6d5bb14a36ef3

        SHA1

        679a82ed172d49f298bf07b6fa0de9b6c2ce0046

        SHA256

        e4410bc67b1ee8af2df456713b85040917b8cf749fb7d660feeb625b25ec9c51

        SHA512

        96e2baa6ce0220b9ad167b60220c683d5b080a9ba9a2e4d320aae6989f4aa2d241f8078e69bdd2da39a20d9b57ae84240da912d29e5e1db36cc90cf6a0537458

      • C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

        Filesize

        3KB

        MD5

        bf36e8f4080abeefd581b9031ab7d4aa

        SHA1

        557d52bcf3c062adffba3c714209387ad848f703

        SHA256

        deaa61f5e41bf912e5629f8cb52698d3581ba6117de8d624b0fd9211a7f2f6f7

        SHA512

        37051e11322d4cf8e9b304464068530ad80b09d14083bf410c404534b537c34fbf39280bae53b140892bed76e87191559651dae1126525dc1225a101165ac74d

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

        Filesize

        7KB

        MD5

        c3e0978c9240203fec4bb1fa0bf47f46

        SHA1

        8d139f6dd730b2c30eedcd50b4ae597cf2fb40d3

        SHA256

        77fe820d88b888fed3b883a97133c20180ce71daa0962586b9aad573586f1d5b

        SHA512

        250b58de7c480f4017837233b1ea621d5a0e9ab852866a3327a4b0c725211aeed17bdc64ce16a2efc95c4be05de4121b0ef0913c58b3993fc326c9adcb83ef15

      • memory/772-53-0x0000000001D20000-0x0000000001D28000-memory.dmp

        Filesize

        32KB

      • memory/772-52-0x000000001B7F0000-0x000000001BAD2000-memory.dmp

        Filesize

        2.9MB

      • memory/2392-72-0x0000000002860000-0x0000000002868000-memory.dmp

        Filesize

        32KB

      • memory/2392-71-0x000000001B640000-0x000000001B922000-memory.dmp

        Filesize

        2.9MB

      • memory/2704-15-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

        Filesize

        9.9MB

      • memory/2704-0-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

        Filesize

        4KB

      • memory/2704-1-0x00000000003E0000-0x00000000004A6000-memory.dmp

        Filesize

        792KB

      • memory/2728-14-0x0000000001220000-0x0000000001260000-memory.dmp

        Filesize

        256KB

      • memory/2804-37-0x0000000002860000-0x0000000002868000-memory.dmp

        Filesize

        32KB

      • memory/2804-36-0x000000001B730000-0x000000001BA12000-memory.dmp

        Filesize

        2.9MB

      • memory/2840-30-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

        Filesize

        32KB

      • memory/2840-29-0x000000001B670000-0x000000001B952000-memory.dmp

        Filesize

        2.9MB

      • memory/2940-60-0x000000001B4F0000-0x000000001B7D2000-memory.dmp

        Filesize

        2.9MB

      • memory/2940-61-0x0000000001E10000-0x0000000001E18000-memory.dmp

        Filesize

        32KB

      • memory/3028-16-0x00000000021E0000-0x0000000002220000-memory.dmp

        Filesize

        256KB