Analysis

  • max time kernel
    145s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231201-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231201-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/12/2023, 05:55

General

  • Target

    44e2a2a697477c436112954794761cc0.exe

  • Size

    1.1MB

  • MD5

    44e2a2a697477c436112954794761cc0

  • SHA1

    87195428fd9e65ea14889e4853dc44f391088963

  • SHA256

    90f403c6304240465460ace49b8db9d46c7d28bc36fd49b89f4722ee497bd2dd

  • SHA512

    c2040c04ec3d743941c2ba059f572f07d5df2a043c5302b3cf6e13d74610025457be22c3b8d9a1943873b99ac72e5972830a5c17becc52fdc19582e0d58911c4

  • SSDEEP

    24576:U2G/nvxW3Ww0titP01wNiMXBlVJX3NSdGKJg6U8HC:UbA30KP0XMXHX38dPDi

Score
10/10

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 12 IoCs

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

  • DCRat payload 6 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in Program Files directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 12 IoCs

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

  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 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\44e2a2a697477c436112954794761cc0.exe
    "C:\Users\Admin\AppData\Local\Temp\44e2a2a697477c436112954794761cc0.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3856
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\bridgewin\j1qIwrxR5PWhzH3rYbChGhv1rfV.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:1360
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\bridgewin\aVtauS9Ns.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3116
        • C:\bridgewin\intoperf.exe
          "C:\bridgewin\intoperf.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3860
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\6uMYZ5DmT2.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:3816
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:3692
              • C:\Program Files\Windows Multimedia Platform\wininit.exe
                "C:\Program Files\Windows Multimedia Platform\wininit.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of AdjustPrivilegeToken
                PID:3580
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Multimedia Platform\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1148
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Multimedia Platform\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2548
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Multimedia Platform\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4680
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 9 /tr "'C:\Users\Default\SendTo\backgroundTaskHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4600
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Users\Default\SendTo\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1120
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 10 /tr "'C:\Users\Default\SendTo\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3980
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Users\Default User\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1644
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Default User\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2404
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Users\Default User\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2836
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Program Files\Microsoft Office\Updates\Download\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4560
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\Updates\Download\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3864
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Program Files\Microsoft Office\Updates\Download\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3924

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files\Windows Multimedia Platform\wininit.exe

            Filesize

            827KB

            MD5

            cb173771fd6331c5d9db3bef77acb57a

            SHA1

            f3680aab95eb9f37b38cc616bc6b01db3cc953c2

            SHA256

            251f52babec252887919e29c83180c6075a08e395f7fc2f44222e0dd320478b8

            SHA512

            826730b301286e2d1c1137716c393a2fee686cc3146852e3903e9b3ca7026dce9dbb839537028d8deb16903d60b4604830b51992058f649cc2259cacf3f55bb7

          • C:\Program Files\Windows Multimedia Platform\wininit.exe

            Filesize

            827KB

            MD5

            cb173771fd6331c5d9db3bef77acb57a

            SHA1

            f3680aab95eb9f37b38cc616bc6b01db3cc953c2

            SHA256

            251f52babec252887919e29c83180c6075a08e395f7fc2f44222e0dd320478b8

            SHA512

            826730b301286e2d1c1137716c393a2fee686cc3146852e3903e9b3ca7026dce9dbb839537028d8deb16903d60b4604830b51992058f649cc2259cacf3f55bb7

          • C:\Users\Admin\AppData\Local\Temp\6uMYZ5DmT2.bat

            Filesize

            221B

            MD5

            3ed36fce1a7bb42e8bd8a9010f997c14

            SHA1

            f81441e8593b15b861750d9b7e080a0fc7de0954

            SHA256

            e6aa8a2142db52fb2945de64c955a768048be27fff1f3b2552036a0293d453c6

            SHA512

            4bd469714d4b931fb6c2f014f8a5071c7e403bae7bead6905d7c2c44e0e7e93ce5da940d85e25b8880536161a208cacef3bc1c8d08c7f9d21708dfe148c65699

          • C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\backgroundTaskHost.exe

            Filesize

            827KB

            MD5

            cb173771fd6331c5d9db3bef77acb57a

            SHA1

            f3680aab95eb9f37b38cc616bc6b01db3cc953c2

            SHA256

            251f52babec252887919e29c83180c6075a08e395f7fc2f44222e0dd320478b8

            SHA512

            826730b301286e2d1c1137716c393a2fee686cc3146852e3903e9b3ca7026dce9dbb839537028d8deb16903d60b4604830b51992058f649cc2259cacf3f55bb7

          • C:\bridgewin\aVtauS9Ns.bat

            Filesize

            27B

            MD5

            9563bdb4457bb726008ec17163dcefe6

            SHA1

            7c2927cc8ae633484e96cf0926eabadcffe44554

            SHA256

            f7016b9d9c3f1d7b89e0a4c06b1183e0d7207be92bad7e7cc960e976758fac4c

            SHA512

            5e5cb09ac2017366cbc024e452983ea783b763b837e00c67e450a86a7b83fbc5bf97da87b19d41f0393e8faf5d97491529d55a52e4556868a249d299bc002591

          • C:\bridgewin\intoperf.exe

            Filesize

            827KB

            MD5

            cb173771fd6331c5d9db3bef77acb57a

            SHA1

            f3680aab95eb9f37b38cc616bc6b01db3cc953c2

            SHA256

            251f52babec252887919e29c83180c6075a08e395f7fc2f44222e0dd320478b8

            SHA512

            826730b301286e2d1c1137716c393a2fee686cc3146852e3903e9b3ca7026dce9dbb839537028d8deb16903d60b4604830b51992058f649cc2259cacf3f55bb7

          • C:\bridgewin\intoperf.exe

            Filesize

            827KB

            MD5

            cb173771fd6331c5d9db3bef77acb57a

            SHA1

            f3680aab95eb9f37b38cc616bc6b01db3cc953c2

            SHA256

            251f52babec252887919e29c83180c6075a08e395f7fc2f44222e0dd320478b8

            SHA512

            826730b301286e2d1c1137716c393a2fee686cc3146852e3903e9b3ca7026dce9dbb839537028d8deb16903d60b4604830b51992058f649cc2259cacf3f55bb7

          • C:\bridgewin\j1qIwrxR5PWhzH3rYbChGhv1rfV.vbe

            Filesize

            195B

            MD5

            bcb81ae961fe26cc730d5429caee2a15

            SHA1

            5eee2200e5a5d79aa54e9de51a5e7332d26b32fc

            SHA256

            d8fe32ec91d7d9e865ce5f3a3382d6093ea78fbeb4dfe521021ad918f6f64bc3

            SHA512

            aaea8d450d6ca80ff0b6d82b8585a9e808863891fbc2de9387ad0220263d98898c89bebca90d331bef7eb900718c8625d4a259c0034b05246524e6d83fe5599d

          • memory/3580-33-0x00007FFBFAB60000-0x00007FFBFB621000-memory.dmp

            Filesize

            10.8MB

          • memory/3580-36-0x0000000001700000-0x0000000001710000-memory.dmp

            Filesize

            64KB

          • memory/3580-35-0x00007FFBFAB60000-0x00007FFBFB621000-memory.dmp

            Filesize

            10.8MB

          • memory/3580-34-0x0000000001700000-0x0000000001710000-memory.dmp

            Filesize

            64KB

          • memory/3860-12-0x0000000000A60000-0x0000000000B36000-memory.dmp

            Filesize

            856KB

          • memory/3860-28-0x00007FFBFAB60000-0x00007FFBFB621000-memory.dmp

            Filesize

            10.8MB

          • memory/3860-14-0x000000001B800000-0x000000001B810000-memory.dmp

            Filesize

            64KB

          • memory/3860-13-0x00007FFBFAB60000-0x00007FFBFB621000-memory.dmp

            Filesize

            10.8MB