Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    06-11-2024 12:36

General

  • Target

    2024-11-06_9fc1a894f48c14ca703edb75b4b1d340_cobalt-strike_ryuk.exe

  • Size

    2.4MB

  • MD5

    9fc1a894f48c14ca703edb75b4b1d340

  • SHA1

    64e7263f9c572e65d69eaab3f30c4dfb91cca87a

  • SHA256

    c7b6685f52c3b23d1bc350ab366bcf2acd94c9fe35f18cc3167df325e701ef64

  • SHA512

    36dd4871de58aa05c77a84fb6c5ab818cc36ade818fad3a3fbe10ccc161f095febfae6300ffcd6f433b19d6e9d7ad130d5654da9a32ad39b26b1f0a5629639fb

  • SSDEEP

    49152:By2cW23etDz1x5bhnUHiBRuiH28jbp5ccpnpuoijYT4Uf:pzV5RHVp5Jai

Malware Config

Extracted

Family

phorphiex

C2

http://185.215.113.84

http://185.215.113.66

Signatures

  • Modifies security service 2 TTPs 1 IoCs
  • Phorphiex family
  • Phorphiex payload 1 IoCs
  • Phorphiex, Phorpiex

    Phorphiex or Phorpiex Malware family which infects systems to distribute other malicious payloads such as ransomware, stealers and cryptominers.

  • Windows security bypass 2 TTPs 6 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Downloads MZ/PE file
  • Stops running service(s) 4 TTPs
  • Executes dropped EXE 10 IoCs
  • Loads dropped DLL 9 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Windows security modification 2 TTPs 7 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Launches sc.exe 5 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 13 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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\2024-11-06_9fc1a894f48c14ca703edb75b4b1d340_cobalt-strike_ryuk.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-11-06_9fc1a894f48c14ca703edb75b4b1d340_cobalt-strike_ryuk.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3040
    • C:\Users\Admin\AppData\Local\Temp\1C38.exe
      "C:\Users\Admin\AppData\Local\Temp\1C38.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2844
      • C:\Users\Admin\AppData\Local\Temp\198557222.exe
        C:\Users\Admin\AppData\Local\Temp\198557222.exe
        3⤵
        • Executes dropped EXE
        PID:1268
    • C:\Users\Admin\AppData\Local\Temp\2024-11-06_9fc1a894f48c14ca703edb75b4b1d340_cobalt-strike_ryuk.exe
      C:\Users\Admin\AppData\Local\Temp\2024-11-06_9fc1a894f48c14ca703edb75b4b1d340_cobalt-strike_ryuk.exe --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports" "--crash-count-file=C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\crash_count.txt" --url=https://crashstats-collector.opera.com/collector/submit --annotation=channel=Stable --annotation=plat=Win64 --annotation=prod=OperaDesktopGX --annotation=ver=78.0.4093.214 --initial-client-data=0x340,0x344,0x348,0x318,0x34c,0x140246d00,0x140246d10,0x140246d20
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2996
      • C:\Users\Admin\AppData\Local\Temp\2C7D.exe
        "C:\Users\Admin\AppData\Local\Temp\2C7D.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2988
        • C:\Users\Admin\AppData\Local\Temp\118477986.exe
          C:\Users\Admin\AppData\Local\Temp\118477986.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2480
          • C:\Windows\sysppvrdnvs.exe
            C:\Windows\sysppvrdnvs.exe
            5⤵
            • Modifies security service
            • Windows security bypass
            • Executes dropped EXE
            • Loads dropped DLL
            • Windows security modification
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:588
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c powershell -Command "Add-MpPreference -ExclusionPath $env:windir; Add-MpPreference -ExclusionPath $env:TEMP; Add-MpPreference -ExclusionPath $env:USERPROFILE"
              6⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:628
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                powershell -Command "Add-MpPreference -ExclusionPath $env:windir; Add-MpPreference -ExclusionPath $env:TEMP; Add-MpPreference -ExclusionPath $env:USERPROFILE"
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1052
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop DoSvc & sc stop BITS /wait
              6⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:1160
              • C:\Windows\SysWOW64\sc.exe
                sc stop UsoSvc
                7⤵
                • Launches sc.exe
                • System Location Discovery: System Language Discovery
                PID:2188
              • C:\Windows\SysWOW64\sc.exe
                sc stop WaaSMedicSvc
                7⤵
                • Launches sc.exe
                • System Location Discovery: System Language Discovery
                PID:2856
              • C:\Windows\SysWOW64\sc.exe
                sc stop wuauserv
                7⤵
                • Launches sc.exe
                • System Location Discovery: System Language Discovery
                PID:2864
              • C:\Windows\SysWOW64\sc.exe
                sc stop DoSvc
                7⤵
                • Launches sc.exe
                • System Location Discovery: System Language Discovery
                PID:780
              • C:\Windows\SysWOW64\sc.exe
                sc stop BITS /wait
                7⤵
                • Launches sc.exe
                • System Location Discovery: System Language Discovery
                PID:768
            • C:\Users\Admin\AppData\Local\Temp\1759425692.exe
              C:\Users\Admin\AppData\Local\Temp\1759425692.exe
              6⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:1600
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /c reg delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Windows Upgrade Manager" /f
                7⤵
                  PID:2840
                  • C:\Windows\system32\reg.exe
                    reg delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Windows Upgrade Manager" /f
                    8⤵
                      PID:2636
                  • C:\Windows\System32\cmd.exe
                    "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "Windows Upgrade Manager"
                    7⤵
                      PID:2772
                      • C:\Windows\system32\schtasks.exe
                        schtasks /delete /f /tn "Windows Upgrade Manager"
                        8⤵
                          PID:3044
                    • C:\Users\Admin\AppData\Local\Temp\1525616916.exe
                      C:\Users\Admin\AppData\Local\Temp\1525616916.exe
                      6⤵
                      • Executes dropped EXE
                      PID:2228
                    • C:\Users\Admin\AppData\Local\Temp\155948500.exe
                      C:\Users\Admin\AppData\Local\Temp\155948500.exe
                      6⤵
                      • Executes dropped EXE
                      • Loads dropped DLL
                      • System Location Discovery: System Language Discovery
                      PID:2352
                      • C:\Users\Admin\AppData\Local\Temp\1230134719.exe
                        C:\Users\Admin\AppData\Local\Temp\1230134719.exe
                        7⤵
                        • Executes dropped EXE
                        PID:2388
                    • C:\Users\Admin\AppData\Local\Temp\2952532596.exe
                      C:\Users\Admin\AppData\Local\Temp\2952532596.exe
                      6⤵
                      • Executes dropped EXE
                      PID:2856

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\8P9TO0C6\1[1]

            Filesize

            108KB

            MD5

            1fcb78fb6cf9720e9d9494c42142d885

            SHA1

            fef9c2e728ab9d56ce9ed28934b3182b6f1d5379

            SHA256

            84652bb8c63ca4fd7eb7a2d6ef44029801f3057aa2961867245a3a765928dd02

            SHA512

            cdf58e463af1784aea86995b3e5d6b07701c5c4095e30ec80cc901ffd448c6f4f714c521bf8796ffa8c47538bf8bf5351e157596efaa7ab88155d63dc33f7dc3

          • C:\Users\Admin\AppData\Local\Temp\118477986.exe

            Filesize

            83KB

            MD5

            06560b5e92d704395bc6dae58bc7e794

            SHA1

            fbd3e4ae28620197d1f02bfc24adaf4ddacd2372

            SHA256

            9eaaadf3857e4a3e83f4f78d96ab185213b6528c8e470807f9d16035daadf33d

            SHA512

            b55b49fc1bd526c47d88fcf8a20fcaed900bfb291f2e3e1186ec196a87127ed24df71385ae04fedcc802c362c4ebf38edfc182013febf4496ddeb66ce5195ee3

          • C:\Users\Admin\AppData\Local\Temp\1C38.exe

            Filesize

            9KB

            MD5

            8d8e6c7952a9dc7c0c73911c4dbc5518

            SHA1

            9098da03b33b2c822065b49d5220359c275d5e94

            SHA256

            feb4c3ae4566f0acbb9e0f55417b61fefd89dc50a4e684df780813fb01d61278

            SHA512

            91a573843c28dd32a9f31a60ba977f9a3d4bb19ffd1b7254333e09bcecef348c1b3220a348ebb2cb08edb57d56cb7737f026519da52199c9dc62c10aea236645

          • C:\Users\Admin\AppData\Roaming\Opera Software\Opera GX Stable\Crash Reports\settings.dat

            Filesize

            40B

            MD5

            9d05e84e73ffe7e859c25ab6fe630738

            SHA1

            2cf8a851e1e7e4042d1e26c382fb926165333844

            SHA256

            8dda3d9290c893adda53fd2fc4f01e8faeb762ecd3360de0df8002296b88c761

            SHA512

            d0bfff0a953d00fc2ec07bb9dd46afb1065eb01cf349d44b27130842d72a45d9d8ed830248a0ae2452905a1fad328228e7e9952e2ffa949f0b4704b649f28848

          • \Users\Admin\AppData\Local\Temp\1230134719.exe

            Filesize

            5.6MB

            MD5

            13b26b2c7048a92d6a843c1302618fad

            SHA1

            89c2dfc01ac12ef2704c7669844ec69f1700c1ca

            SHA256

            1753ad35ece25ab9a19048c70062e9170f495e313d7355ebbba59c38f5d90256

            SHA512

            d6aff89b61c9945002a6798617ad304612460a607ef1cfbdcb32f8932ca648bcee1d5f2e0321bb4c58c1f4642b1e0ececc1eb82450fdec7dff69b5389f195455

          • \Users\Admin\AppData\Local\Temp\1525616916.exe

            Filesize

            15KB

            MD5

            0c37ee292fec32dba0420e6c94224e28

            SHA1

            012cbdddaddab319a4b3ae2968b42950e929c46b

            SHA256

            981d724feebc36777e99513dc061d1f009e589f965c920797285c46d863060d1

            SHA512

            2b60b571c55d0441ba0cfc695f9db5cd12660ebec7effc7e893c3b7a1c6cb6149df487c31b8d748697e260cbc4af29331592b705ea9638f64a711c7a6164628b

          • \Users\Admin\AppData\Local\Temp\155948500.exe

            Filesize

            10KB

            MD5

            96509ab828867d81c1693b614b22f41d

            SHA1

            c5f82005dbda43cedd86708cc5fc3635a781a67e

            SHA256

            a9de2927b0ec45cf900508fec18531c04ee9fa8a5dfe2fc82c67d9458cf4b744

            SHA512

            ff603117a06da8fb2386c1d2049a5896774e41f34d05951ecd4e7b5fc9da51a373e3fcf61af3577ff78490cf898471ce8e71eae848a12812fe98cd7e76e1a9ca

          • \Users\Admin\AppData\Local\Temp\1759425692.exe

            Filesize

            8KB

            MD5

            cb8420e681f68db1bad5ed24e7b22114

            SHA1

            416fc65d538d3622f5ca71c667a11df88a927c31

            SHA256

            5850892f67f85991b31fc90f62c8b7791afeb3c08ae1877d857aa2b59471a2ea

            SHA512

            baaabcc4ad5d409267a34ed7b20e4afb4d247974bfc581d39aae945e5bf8a673a1f8eacae2e6783480c8baaeb0a80d028274a202d456f13d0af956afa0110fdf

          • \Users\Admin\AppData\Local\Temp\2952532596.exe

            Filesize

            49KB

            MD5

            c1c2524e6fc9dc3f492248f09cf37d32

            SHA1

            fabcb2a675dcb31070d763a2fabc90259921a20d

            SHA256

            d7c3ed2599c214b4dbcdbb34d2f378cc5a99833cc051143338bf848cc87fda97

            SHA512

            ead31dbcd27538dcd734f7568441dc733ae472dbcc475308b69e90f13cc5b1fda5e13afab4241b18006e81b8e52ff9894685a4e8d2cf9161d2b77716119de89f

          • memory/1600-67-0x000000013FCE0000-0x000000013FCE6000-memory.dmp

            Filesize

            24KB