Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-12-2024 02:39

General

  • Target

    54c2cddb942d1e8d23dc7cf72043f1875aed4b25047b3587ddc017cb266bfdab.exe

  • Size

    1.8MB

  • MD5

    7ef44e6c54801a42dc9cff0bf0459036

  • SHA1

    45322aee2375b98a8b443e08d5e9f58ac10e9e2d

  • SHA256

    54c2cddb942d1e8d23dc7cf72043f1875aed4b25047b3587ddc017cb266bfdab

  • SHA512

    dfdd479a802f308cc1b49886020cf420127dd87be5642d27452c3ee08198b1efbfca8358e62ed91141ed778ce3cef7ff154e0114eae27220ce81d6cd1acb5250

  • SSDEEP

    49152:ZWqKKPZ1snfJ+rqDPuQDLME5MT4rDQNpfh:DKKZ1sRD2Q3N5MT4r

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 6 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • System policy modification 1 TTPs 6 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\54c2cddb942d1e8d23dc7cf72043f1875aed4b25047b3587ddc017cb266bfdab.exe
    "C:\Users\Admin\AppData\Local\Temp\54c2cddb942d1e8d23dc7cf72043f1875aed4b25047b3587ddc017cb266bfdab.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3160
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\54c2cddb942d1e8d23dc7cf72043f1875aed4b25047b3587ddc017cb266bfdab.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5028
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\csrss.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3760
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Offline Web Pages\SearchApp.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4540
    • C:\Users\Admin\csrss.exe
      "C:\Users\Admin\csrss.exe"
      2⤵
      • UAC bypass
      • Checks computer location settings
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:2316
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\f896aa32-8819-4bd0-9582-15787a7728c2.vbs"
        3⤵
          PID:4932
        • C:\Windows\System32\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\40052692-b50f-4c23-ba89-bf2a19d41404.vbs"
          3⤵
            PID:1900
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\csrss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3520
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Admin\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3556
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4304
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 11 /tr "'C:\Windows\Offline Web Pages\SearchApp.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4456
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\Offline Web Pages\SearchApp.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2384
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 5 /tr "'C:\Windows\Offline Web Pages\SearchApp.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1108
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3540
      • C:\Windows\system32\wbem\WmiApSrv.exe
        C:\Windows\system32\wbem\WmiApSrv.exe
        1⤵
          PID:2900

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • 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

          6d42b6da621e8df5674e26b799c8e2aa

          SHA1

          ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

          SHA256

          5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

          SHA512

          53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

        • 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\Temp\40052692-b50f-4c23-ba89-bf2a19d41404.vbs

          Filesize

          476B

          MD5

          1709bf572c09f126b0c4655f8d651f65

          SHA1

          911306ef18de81f7b4f9118401ec54d953d1ed2e

          SHA256

          3ab8168db278398bd03da0901aa8b7efbf7078d2379d5150b0f728d015f0e289

          SHA512

          b795c8ba42e441f016b4f98dbc591e465ea9ae99260752324358b0a21b97c77a02358d7566a5a4835e6f7b560e9051c8104282ed869fe4d302b473f0e14cc8ff

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ohrc4vbb.rge.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\f896aa32-8819-4bd0-9582-15787a7728c2.vbs

          Filesize

          700B

          MD5

          9a633c00f22c4b306a88d88a1dd38092

          SHA1

          5362905af5d2e9b85ac45296443d3586d1aeb150

          SHA256

          c6c17cf927378f4fe59946542cc911909b1c393085b7a1c81009a234f2f3676a

          SHA512

          723cd32b2c3ed5fa771c53a92f6cb462c3b68457814e400f449953f5c912d48cbdde420b9ee23dbb4ede34cdba09d55ea901227b3a269d6caa81a916dac97223

        • C:\Users\Admin\csrss.exe

          Filesize

          1.8MB

          MD5

          7ef44e6c54801a42dc9cff0bf0459036

          SHA1

          45322aee2375b98a8b443e08d5e9f58ac10e9e2d

          SHA256

          54c2cddb942d1e8d23dc7cf72043f1875aed4b25047b3587ddc017cb266bfdab

          SHA512

          dfdd479a802f308cc1b49886020cf420127dd87be5642d27452c3ee08198b1efbfca8358e62ed91141ed778ce3cef7ff154e0114eae27220ce81d6cd1acb5250

        • C:\Windows\Offline Web Pages\SearchApp.exe

          Filesize

          1.8MB

          MD5

          d12cafac06ebb67ff4dab2d8c00128af

          SHA1

          a78b69ca0f3cf57014392b7a028777bd31d89fac

          SHA256

          2ffce989e23a8e554e8408167122ac6441256d50656fd26ae405b64abc31caf7

          SHA512

          4f0b3e344b6e497476530f1ac1fcadb2303557cb82c032b3c2409804e66836a2e552d3b33908360b51d1c68e28896f83344f44162b54ef19952c56fbed50f7ea

        • memory/2316-287-0x000000001DB40000-0x000000001DB50000-memory.dmp

          Filesize

          64KB

        • memory/3160-8-0x00000000027B0000-0x00000000027B8000-memory.dmp

          Filesize

          32KB

        • memory/3160-16-0x000000001BA80000-0x000000001BA8C000-memory.dmp

          Filesize

          48KB

        • memory/3160-11-0x00000000028F0000-0x00000000028FC000-memory.dmp

          Filesize

          48KB

        • memory/3160-12-0x000000001B2E0000-0x000000001B2EC000-memory.dmp

          Filesize

          48KB

        • memory/3160-13-0x000000001B2F0000-0x000000001B2FC000-memory.dmp

          Filesize

          48KB

        • memory/3160-14-0x000000001B960000-0x000000001B96C000-memory.dmp

          Filesize

          48KB

        • memory/3160-15-0x000000001BA70000-0x000000001BA78000-memory.dmp

          Filesize

          32KB

        • memory/3160-20-0x000000001BC00000-0x000000001BC0C000-memory.dmp

          Filesize

          48KB

        • memory/3160-21-0x000000001BC10000-0x000000001BC1C000-memory.dmp

          Filesize

          48KB

        • memory/3160-19-0x000000001BBF0000-0x000000001BBF8000-memory.dmp

          Filesize

          32KB

        • memory/3160-22-0x00007FFD22060000-0x00007FFD22B21000-memory.dmp

          Filesize

          10.8MB

        • memory/3160-18-0x000000001BBA0000-0x000000001BBAE000-memory.dmp

          Filesize

          56KB

        • memory/3160-17-0x000000001BA90000-0x000000001BA9A000-memory.dmp

          Filesize

          40KB

        • memory/3160-10-0x00000000027D0000-0x00000000027DC000-memory.dmp

          Filesize

          48KB

        • memory/3160-25-0x00007FFD22060000-0x00007FFD22B21000-memory.dmp

          Filesize

          10.8MB

        • memory/3160-7-0x0000000002790000-0x00000000027A6000-memory.dmp

          Filesize

          88KB

        • memory/3160-0-0x00007FFD22063000-0x00007FFD22065000-memory.dmp

          Filesize

          8KB

        • memory/3160-9-0x00000000027C0000-0x00000000027CA000-memory.dmp

          Filesize

          40KB

        • memory/3160-1-0x0000000000480000-0x000000000064C000-memory.dmp

          Filesize

          1.8MB

        • memory/3160-5-0x0000000000E60000-0x0000000000E68000-memory.dmp

          Filesize

          32KB

        • memory/3160-6-0x0000000002780000-0x0000000002790000-memory.dmp

          Filesize

          64KB

        • memory/3160-4-0x000000001B910000-0x000000001B960000-memory.dmp

          Filesize

          320KB

        • memory/3160-277-0x00007FFD22060000-0x00007FFD22B21000-memory.dmp

          Filesize

          10.8MB

        • memory/3160-3-0x0000000002760000-0x000000000277C000-memory.dmp

          Filesize

          112KB

        • memory/3160-2-0x00007FFD22060000-0x00007FFD22B21000-memory.dmp

          Filesize

          10.8MB

        • memory/3760-222-0x000002256C650000-0x000002256C672000-memory.dmp

          Filesize

          136KB