Analysis

  • max time kernel
    116s
  • max time network
    104s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    24-01-2025 06:50

General

  • Target

    774341277a7503097d574a8d34ec19abae11986e3d14925de81bdd680eac050dN.exe

  • Size

    2.2MB

  • MD5

    889f050ef7bc85238ef3ba17c1ca8530

  • SHA1

    5168769f30a3efbf81ec2174c84d4290882b4c08

  • SHA256

    774341277a7503097d574a8d34ec19abae11986e3d14925de81bdd680eac050d

  • SHA512

    4a7c67efba35f6e12d2953466e8e7b3a05254ae1fc0cfd43cb16d9cb50bc4e69bdfb44d25d8555b36d7a6096a8a3c8c160de1cd03ee022c5a57681c59c7bf0ef

  • SSDEEP

    49152:ssSHlG56vO0T3/Nh/ptuw/C3TqGaDxr1NcWTMUvif:sLlK6d3/Nh/bV/Oq3Dxp2RUG

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Modifies WinLogon for persistence 2 TTPs 7 IoCs
  • Process spawned unexpected child process 21 IoCs

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

  • UAC bypass 3 TTPs 9 IoCs
  • DCRat payload 6 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 14 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Drops file in Program Files directory 20 IoCs
  • Drops file in Windows directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 21 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • System policy modification 1 TTPs 9 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\774341277a7503097d574a8d34ec19abae11986e3d14925de81bdd680eac050dN.exe
    "C:\Users\Admin\AppData\Local\Temp\774341277a7503097d574a8d34ec19abae11986e3d14925de81bdd680eac050dN.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Drops file in Drivers directory
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2720
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\MKRyAEqWep.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1596
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:1508
        • C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe
          "C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:2356
          • C:\Windows\System32\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\c15089f3-b473-4147-9072-14c269f51550.vbs"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:112
            • C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe
              "C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe"
              5⤵
              • UAC bypass
              • Executes dropped EXE
              • Checks whether UAC is enabled
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              • System policy modification
              PID:2664
              • C:\Windows\System32\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\c177ddae-02ea-4545-b094-d40d4532458b.vbs"
                6⤵
                  PID:2408
                • C:\Windows\System32\WScript.exe
                  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\15f976bb-e13f-4a34-8e30-0ad823272e98.vbs"
                  6⤵
                    PID:2904
              • C:\Windows\System32\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\0f068a19-5bc8-45a7-8664-208bfde844c4.vbs"
                4⤵
                  PID:1892
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "lsml" /sc MINUTE /mo 6 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\lsm.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:3048
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\lsm.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2404
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "lsml" /sc MINUTE /mo 14 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\lsm.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1224
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Portable Devices\System.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2948
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\System.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:3064
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Portable Devices\System.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1520
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "servicess" /sc MINUTE /mo 13 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2140
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1204
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "servicess" /sc MINUTE /mo 14 /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1212
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Mail\spoolsv.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2292
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\spoolsv.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2552
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Mail\spoolsv.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2804
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\spoolsv.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2364
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\spoolsv.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1256
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\spoolsv.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2652
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Windows\IME\smss.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1208
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\IME\smss.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:880
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Windows\IME\smss.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:476
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows NT\csrss.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2416
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\csrss.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:3004
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows NT\csrss.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1940

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\services.exe

            Filesize

            2.2MB

            MD5

            773ab8cb58ac8c4fe7411ba398d91ed9

            SHA1

            80191b7e7185c45a1552251488d5257ac78c441b

            SHA256

            996eb6ae0a1ae207d229ca14a6f4d473ab6181ce5450906a307c1c1c7f11c618

            SHA512

            6d46a6fa290311ea7b02f8595b86af4fbbcad65101b3ad67b1f46ac833e5d8b6078708a406bad3b2241ffb011786a70ed8d78fb7290693807af900421776c956

          • C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\spoolsv.exe

            Filesize

            2.2MB

            MD5

            889f050ef7bc85238ef3ba17c1ca8530

            SHA1

            5168769f30a3efbf81ec2174c84d4290882b4c08

            SHA256

            774341277a7503097d574a8d34ec19abae11986e3d14925de81bdd680eac050d

            SHA512

            4a7c67efba35f6e12d2953466e8e7b3a05254ae1fc0cfd43cb16d9cb50bc4e69bdfb44d25d8555b36d7a6096a8a3c8c160de1cd03ee022c5a57681c59c7bf0ef

          • C:\Users\Admin\AppData\Local\Temp\0f068a19-5bc8-45a7-8664-208bfde844c4.vbs

            Filesize

            532B

            MD5

            4ddbe5903c64757a14b9634b9bd505b7

            SHA1

            42f12661af09e7eb209f25accbdfc38a4c7cd51d

            SHA256

            1583d8c19d54bf78fff78fd05ec17ef2341c29084cfa4b41c2db4eeb18811b54

            SHA512

            83d95911e4873f87a2918ba4641f7d6a81eb6348225aa85fd606fc95fd2b6f16a0ccf19af736202c778ffe437e6e2646871809593f4d3e018021d833d7d5b259

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

            Filesize

            245B

            MD5

            2b53f8807a192bae4b0ad638d2755c45

            SHA1

            75110f9a4326fa9606467061a3cdacd7e5aa3d67

            SHA256

            609079bce63fc379b5cb59e6c5ab22a8e0be9b218215f19a2bfc3c8ca46b3136

            SHA512

            c42f0276ecd5d98765d2868cc8916e1d2f9372b32cee9915f4f111720093f8ae046d23b7420c2b85ed5088de660315d9727eff89f77f61f0d29ec16c7c9c13bd

          • C:\Users\Admin\AppData\Local\Temp\c15089f3-b473-4147-9072-14c269f51550.vbs

            Filesize

            756B

            MD5

            f16f3edf1d792a9033ca6bc6a1546cfc

            SHA1

            5b98027e090b9025e5be8273fc1913e057500e62

            SHA256

            3b8be3dd941618d666ea6e6697f302d0c9cdbe11422de3e66786f4cf8e9c5e3d

            SHA512

            8b4715db7755c838f9493c23e4e06d41c0398a5f75ec3ddb75557af57c8fc340a6c017f2799e5649f06839194ef94bca6b28e072c5c283f4f1cd04d84d5f82bc

          • C:\Users\Admin\AppData\Local\Temp\c177ddae-02ea-4545-b094-d40d4532458b.vbs

            Filesize

            756B

            MD5

            89fc5e9ad2cb5a4085441c22446aa52d

            SHA1

            1a2a9454937d7742ab4ffa5a0fbfeaf8c7159f25

            SHA256

            98f574027118938007355da09abed0a2af98b38ea44ffa0fa4c8dc80f179f215

            SHA512

            8b1d137ccfdf92edccfc076ef1bed6a2ac353ffbabb70e6a0d5632357706f99c95a3e91f3d6680e81553759869da19727381e5035dcb801afd3268d0db537097

          • C:\Windows\IME\smss.exe

            Filesize

            2.2MB

            MD5

            d00a91cf20728ac644850d5e34945e78

            SHA1

            b42be973d3fc59bfc0e053e7ba6ea27e58d045e5

            SHA256

            edd431543d8eed3eb2e3d3ac0edbcba4d7d9f41519e8581b817972da8c1dc237

            SHA512

            9f37caf703ae46be8e82fd88c37973a7748a76ed28353e80dc2ff751ff38559b8e4c773e33c273333c6ff68f6b590cb37e2a496ce6e7ac9bf3cb12f2440b54b4

          • memory/2356-138-0x0000000000350000-0x000000000057E000-memory.dmp

            Filesize

            2.2MB

          • memory/2664-149-0x0000000000140000-0x000000000036E000-memory.dmp

            Filesize

            2.2MB

          • memory/2720-19-0x0000000000DB0000-0x0000000000DBC000-memory.dmp

            Filesize

            48KB

          • memory/2720-26-0x0000000000F60000-0x0000000000F6C000-memory.dmp

            Filesize

            48KB

          • memory/2720-11-0x0000000000CC0000-0x0000000000CD0000-memory.dmp

            Filesize

            64KB

          • memory/2720-14-0x0000000000CD0000-0x0000000000CD8000-memory.dmp

            Filesize

            32KB

          • memory/2720-13-0x0000000000CB0000-0x0000000000CBC000-memory.dmp

            Filesize

            48KB

          • memory/2720-10-0x0000000000C10000-0x0000000000C18000-memory.dmp

            Filesize

            32KB

          • memory/2720-15-0x0000000000CE0000-0x0000000000CEC000-memory.dmp

            Filesize

            48KB

          • memory/2720-18-0x0000000000D80000-0x0000000000D92000-memory.dmp

            Filesize

            72KB

          • memory/2720-16-0x0000000000D70000-0x0000000000D78000-memory.dmp

            Filesize

            32KB

          • memory/2720-0-0x000007FEF5933000-0x000007FEF5934000-memory.dmp

            Filesize

            4KB

          • memory/2720-20-0x0000000000DC0000-0x0000000000DCC000-memory.dmp

            Filesize

            48KB

          • memory/2720-21-0x0000000000DD0000-0x0000000000DDC000-memory.dmp

            Filesize

            48KB

          • memory/2720-25-0x0000000000F50000-0x0000000000F5E000-memory.dmp

            Filesize

            56KB

          • memory/2720-24-0x0000000000F00000-0x0000000000F08000-memory.dmp

            Filesize

            32KB

          • memory/2720-23-0x0000000000DF0000-0x0000000000DFE000-memory.dmp

            Filesize

            56KB

          • memory/2720-12-0x0000000000CA0000-0x0000000000CAA000-memory.dmp

            Filesize

            40KB

          • memory/2720-28-0x0000000000F80000-0x0000000000F8C000-memory.dmp

            Filesize

            48KB

          • memory/2720-29-0x000007FEF5930000-0x000007FEF631C000-memory.dmp

            Filesize

            9.9MB

          • memory/2720-27-0x0000000000F70000-0x0000000000F78000-memory.dmp

            Filesize

            32KB

          • memory/2720-22-0x0000000000DE0000-0x0000000000DEA000-memory.dmp

            Filesize

            40KB

          • memory/2720-6-0x0000000000690000-0x0000000000698000-memory.dmp

            Filesize

            32KB

          • memory/2720-8-0x0000000000AF0000-0x0000000000B06000-memory.dmp

            Filesize

            88KB

          • memory/2720-9-0x0000000000C00000-0x0000000000C0C000-memory.dmp

            Filesize

            48KB

          • memory/2720-134-0x000007FEF5930000-0x000007FEF631C000-memory.dmp

            Filesize

            9.9MB

          • memory/2720-7-0x00000000006A0000-0x00000000006B0000-memory.dmp

            Filesize

            64KB

          • memory/2720-5-0x0000000000670000-0x000000000068C000-memory.dmp

            Filesize

            112KB

          • memory/2720-4-0x0000000000660000-0x000000000066E000-memory.dmp

            Filesize

            56KB

          • memory/2720-3-0x0000000000650000-0x000000000065E000-memory.dmp

            Filesize

            56KB

          • memory/2720-2-0x000007FEF5930000-0x000007FEF631C000-memory.dmp

            Filesize

            9.9MB

          • memory/2720-1-0x0000000001200000-0x000000000142E000-memory.dmp

            Filesize

            2.2MB