Analysis

  • max time kernel
    93s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-12-2024 16:14

General

  • Target

    49a7cebdd5432ae98bbb25fd91ce5db982c4dda0bf56d29f777c91c707899acf.exe

  • Size

    1.3MB

  • MD5

    c5ce2536abe6c3e9192673fb8033576a

  • SHA1

    6361e43d1fc5aaeff2b47e2261e123ccc352d1c9

  • SHA256

    49a7cebdd5432ae98bbb25fd91ce5db982c4dda0bf56d29f777c91c707899acf

  • SHA512

    1a5ac2e4b80fe81193739d92dbefa17006c36dfeebac48905764050a1ce2a98bc9bcba0f91c081617f17badee0d06eae3a41c60b7d47ab09df7ca05e3cbd058f

  • SSDEEP

    24576:U2G/nvxW3Ww0t6TnzGmVBDh4+aknuRRZJND0gFJ4rD/IjC:UbA30GnzV/q+DnsXg

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Process spawned unexpected child process 12 IoCs

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

  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

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

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 4 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 12 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 24 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\49a7cebdd5432ae98bbb25fd91ce5db982c4dda0bf56d29f777c91c707899acf.exe
    "C:\Users\Admin\AppData\Local\Temp\49a7cebdd5432ae98bbb25fd91ce5db982c4dda0bf56d29f777c91c707899acf.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1488
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3348
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\providercommon\1zu9dW.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3960
        • C:\providercommon\DllCommonsvc.exe
          "C:\providercommon\DllCommonsvc.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Drops file in System32 directory
          • Drops file in Program Files directory
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3940
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\DllCommonsvc.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4008
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\dwm.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:5108
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Google\Chrome\dllhost.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4828
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\7-Zip\dllhost.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2724
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\SysWOW64\GroupPolicyUsers\sihost.exe'
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3308
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\MJna1tWRuG.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1892
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:3096
              • C:\Program Files\Google\Chrome\dllhost.exe
                "C:\Program Files\Google\Chrome\dllhost.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious use of AdjustPrivilegeToken
                PID:3148
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\providercommon\dwm.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1604
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\providercommon\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4236
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 7 /tr "'C:\providercommon\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4996
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Program Files\Google\Chrome\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3816
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:808
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Program Files\Google\Chrome\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2516
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Program Files\7-Zip\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3540
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\7-Zip\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5104
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Program Files\7-Zip\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:964
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 9 /tr "'C:\Windows\SysWOW64\GroupPolicyUsers\sihost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1580
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\SysWOW64\GroupPolicyUsers\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4816
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 8 /tr "'C:\Windows\SysWOW64\GroupPolicyUsers\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3052

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      2KB

      MD5

      09c38bf09493920e93b25f37f1ae4efe

      SHA1

      42e5d800056f08481870c4ca2d0d48181ca8edc8

      SHA256

      37874b332a80efcccee52825b3d71d1faaae3820e09b47c3f161628bf35cc255

      SHA512

      91eacaafc2cd9f80338302d6b3cc3a1aa957752f63a449fb2c1ebcac2bcc59fd8624d4e042c488b5fbe73b881da86c9de819d500de8c7eb6bc0d3951a2bf9123

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      77d622bb1a5b250869a3238b9bc1402b

      SHA1

      d47f4003c2554b9dfc4c16f22460b331886b191b

      SHA256

      f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

      SHA512

      d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      d28a889fd956d5cb3accfbaf1143eb6f

      SHA1

      157ba54b365341f8ff06707d996b3635da8446f7

      SHA256

      21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

      SHA512

      0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      944B

      MD5

      cadef9abd087803c630df65264a6c81c

      SHA1

      babbf3636c347c8727c35f3eef2ee643dbcc4bd2

      SHA256

      cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

      SHA512

      7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

    • C:\Users\Admin\AppData\Local\Temp\MJna1tWRuG.bat

      Filesize

      207B

      MD5

      6cc0af26cf759b2cc2a1518a0c8250f0

      SHA1

      237f4b974f5332d391b757fe58fa6ba0379f7e5b

      SHA256

      5c2eded40ac88ad42b24c9adf447e4b6918716ec38687a5e23b0be913ec4d8f9

      SHA512

      1f430a76afcf743739e934b51efbb6f53741917daa2fb589e08d5b59b56f7289ab4cbc01759b3b7b14e3c49dc2d4f1d4e815ba6e62dd1939d34357fdc2bda0ea

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_shwrzqpl.sxq.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\providercommon\1zu9dW.bat

      Filesize

      36B

      MD5

      6783c3ee07c7d151ceac57f1f9c8bed7

      SHA1

      17468f98f95bf504cc1f83c49e49a78526b3ea03

      SHA256

      8ab782f0f327a2021530e7230d3aee8abbecb7eed59482a3a46e78b9e3862322

      SHA512

      c6012d4bfac1ed14d0fd9f0eabd0e1c3d647b343db292a907b246271d52a4b7469c809db43910ddba2e8c5045f9cb3d24d0af62d363281e6cb8b39ee94a183e8

    • C:\providercommon\DllCommonsvc.exe

      Filesize

      1.0MB

      MD5

      bd31e94b4143c4ce49c17d3af46bcad0

      SHA1

      f8c51ff3ff909531d9469d4ba1bbabae101853ff

      SHA256

      b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

      SHA512

      f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

    • C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe

      Filesize

      197B

      MD5

      8088241160261560a02c84025d107592

      SHA1

      083121f7027557570994c9fc211df61730455bb5

      SHA256

      2072cc9a4a3b84d4c5178ab41c5588eea7d0103e3928e34d64f17bf97f3d1cc1

      SHA512

      20d9369dd359315848ea30144383a0bb479d86059fdbc3b3256ac84f998193512feb3b1799ab663619920c99fe7e0ebba33ada31a3855094b956fcd351c90478

    • memory/3308-48-0x000002085E600000-0x000002085E622000-memory.dmp

      Filesize

      136KB

    • memory/3940-13-0x00000000009A0000-0x0000000000AB0000-memory.dmp

      Filesize

      1.1MB

    • memory/3940-17-0x000000001B6D0000-0x000000001B6DC000-memory.dmp

      Filesize

      48KB

    • memory/3940-16-0x000000001B6B0000-0x000000001B6BC000-memory.dmp

      Filesize

      48KB

    • memory/3940-15-0x000000001B6C0000-0x000000001B6CC000-memory.dmp

      Filesize

      48KB

    • memory/3940-14-0x0000000002B80000-0x0000000002B92000-memory.dmp

      Filesize

      72KB

    • memory/3940-12-0x00007FFFC1793000-0x00007FFFC1795000-memory.dmp

      Filesize

      8KB

    • memory/3940-91-0x00007FFFC1793000-0x00007FFFC1795000-memory.dmp

      Filesize

      8KB