Analysis

  • max time kernel
    121s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    10-12-2024 02:30

General

  • Target

    366f3a7eb764ad2e8b8bd1ebcf389cbfad6034f4c6257f1cdd21a7a3cac768eb.exe

  • Size

    2.2MB

  • MD5

    3c439a0dac41ce86b80a6b1f2eb8908b

  • SHA1

    1ed48a383c839bf2f601c63e237b02bf532c5f4a

  • SHA256

    366f3a7eb764ad2e8b8bd1ebcf389cbfad6034f4c6257f1cdd21a7a3cac768eb

  • SHA512

    4c446ed60f907b496a5246371f6afb6b7c39d52e5eb89c20cb4aed402de0b8947441badbd7a8ffe17ca38f910538b71f7ee03aec8c8ee463a529395eb5e8af00

  • SSDEEP

    24576:BIKJvchtNfuWMqI/+Q0uwPTJ7CVhqbYziqp66B2eNizXR6yPp+oUP2mBXrp8AfiM:hJiB20rrsiqp6W22ITCdt85aBtuEg

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 24 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.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 24 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\366f3a7eb764ad2e8b8bd1ebcf389cbfad6034f4c6257f1cdd21a7a3cac768eb.exe
    "C:\Users\Admin\AppData\Local\Temp\366f3a7eb764ad2e8b8bd1ebcf389cbfad6034f4c6257f1cdd21a7a3cac768eb.exe"
    1⤵
    • UAC bypass
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1724
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\AvGBYmjZie.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1688
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:2964
        • C:\Program Files (x86)\Internet Explorer\de-DE\csrss.exe
          "C:\Program Files (x86)\Internet Explorer\de-DE\csrss.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:1948
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Photo Viewer\en-US\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2320
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\en-US\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2708
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Photo Viewer\en-US\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2132
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 12 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\WmiPrvSE.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2860
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\WmiPrvSE.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2756
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 12 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\WmiPrvSE.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2736
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2872
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2632
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1796
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2660
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2636
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2724
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 10 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2652
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2620
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1540
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1040
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2792
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Internet Explorer\de-DE\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:320
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Portable Devices\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1000
    • 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:1632
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 14 /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:1628
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:468
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1244
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2916

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\System.exe

      Filesize

      2.2MB

      MD5

      3c439a0dac41ce86b80a6b1f2eb8908b

      SHA1

      1ed48a383c839bf2f601c63e237b02bf532c5f4a

      SHA256

      366f3a7eb764ad2e8b8bd1ebcf389cbfad6034f4c6257f1cdd21a7a3cac768eb

      SHA512

      4c446ed60f907b496a5246371f6afb6b7c39d52e5eb89c20cb4aed402de0b8947441badbd7a8ffe17ca38f910538b71f7ee03aec8c8ee463a529395eb5e8af00

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

      Filesize

      221B

      MD5

      a2ae5c1277c282ee988d329b3dadb528

      SHA1

      5996931f7fd2e726d6d52cc007bf720fb1ace49e

      SHA256

      97cfc3c8c228611f2c805666fc6ac2740c9a6680200cc8741f84a34cf58c1fbb

      SHA512

      30f212760cfe386b47a58c57dba97b1168705b13f2dc018b30e4c6dba5b8ce33003d7057319f0f62a5f3293759c6e30b12cf72730765bc7236b93d9cffcc831c

    • memory/1724-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

      Filesize

      4KB

    • memory/1724-1-0x0000000001220000-0x000000000145A000-memory.dmp

      Filesize

      2.2MB

    • memory/1724-2-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

      Filesize

      9.9MB

    • memory/1724-3-0x0000000000BA0000-0x0000000000BBC000-memory.dmp

      Filesize

      112KB

    • memory/1724-4-0x0000000000BC0000-0x0000000000BD6000-memory.dmp

      Filesize

      88KB

    • memory/1724-5-0x0000000000440000-0x000000000044A000-memory.dmp

      Filesize

      40KB

    • memory/1724-6-0x0000000000F00000-0x0000000000F56000-memory.dmp

      Filesize

      344KB

    • memory/1724-7-0x0000000000B10000-0x0000000000B1C000-memory.dmp

      Filesize

      48KB

    • memory/1724-28-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

      Filesize

      9.9MB

    • memory/1948-32-0x0000000000B20000-0x0000000000D5A000-memory.dmp

      Filesize

      2.2MB