Analysis

  • max time kernel
    95s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250129-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-02-2025 23:20

General

  • Target

    591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe

  • Size

    2.2MB

  • MD5

    86f0b098d34e7964a9da4131d1d58fa9

  • SHA1

    614cbbda0058cefe56cf2e9c0db2e06f95a195a5

  • SHA256

    591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de

  • SHA512

    ca8bb85f6c5cf9766806965d00d9ceaaa490fc93c88fa70de27542cd5520c428a48e9a91c912940858e4c3948f4bc362ce98c76a2e24099341c88f9e3a2289a3

  • SSDEEP

    24576:tg/TM3unSV8JHYj0M14oMKhqN8+r/tse9WPJXelRWjq+jPx8FT2t6nTtHtO3g4Jc:mQenScjKkr/y+qXeliq+iT2t60g7Er3

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 8 IoCs

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

  • UAC bypass 3 TTPs 3 IoCs
  • DCRat payload 5 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Drops file in System32 directory 20 IoCs
  • Drops file in Windows directory 10 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 8 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 19 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • System policy modification 1 TTPs 3 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\591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe
    "C:\Users\Admin\AppData\Local\Temp\591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3648
    • C:\Users\Admin\AppData\Local\Temp\591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe
      "C:\Users\Admin\AppData\Local\Temp\591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4596
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\smbwmiv2\taskhostw.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 "Registry" /sc ONLOGON /tr "'C:\Documents and Settings\Registry.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1536
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de" /sc ONLOGON /tr "'C:\Windows\System\591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4000
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\sxshared\taskhostw.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1360
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\PortableDeviceSyncProvider\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1948
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\PerfLogs\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3056
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\write\sysmon.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1816
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\System32\profext\SppExtComObj.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4004

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de.exe.log

    Filesize

    1KB

    MD5

    b7c0c43fc7804baaa7dc87152cdc9554

    SHA1

    1bab62bd56af745678d4e967d91e1ccfdeed4038

    SHA256

    46386a61f3aaf1b1c2e6efc9fc7e9e9ff16cd13ae58b8d856835771fedb6d457

    SHA512

    9fda3dd00a3406137e0113f13f78e77b20a76512b35820d38df696842cbbf2e2ebabfb99a3846c9637ecb54af858ec1551521187e379872973006426a253f769

  • C:\Users\Registry.exe

    Filesize

    2.2MB

    MD5

    21b20405cee46486c6bdd665e4a56f5b

    SHA1

    9cab3a3adfca73200ccf27f45b02593c735190bc

    SHA256

    44a3a584532812044b0d3f252ef31540cc1d17d9d135241e4d6a592d1236cf1e

    SHA512

    eb345965cf5706d0d194245ee5489927356d3314f346170d90351f55ac30315669430857e48b9e28809568f9109aca64166fff7407733ff70dddbc066bc77e38

  • C:\Windows\System32\PortableDeviceSyncProvider\spoolsv.exe

    Filesize

    2.2MB

    MD5

    ebbabf77b9202e1a4e2d3c695cebe4b4

    SHA1

    3f7a583f9c53908db2ac223e0b8c6cd2e5b862e7

    SHA256

    125968ce387cf8257b5023508578f89bc83bb04a32188d743f06d6e491b7016a

    SHA512

    3582daeb007c5d50612576b7ce173fd90c5e476787e1475df4987a8e0844932da136e8e36612f15f29020271c3e69a35629f766ffddb067706522a81eafbc775

  • C:\Windows\System32\PortableDeviceSyncProvider\spoolsv.exe

    Filesize

    2.2MB

    MD5

    86f0b098d34e7964a9da4131d1d58fa9

    SHA1

    614cbbda0058cefe56cf2e9c0db2e06f95a195a5

    SHA256

    591f9eba78261505ce83e1b6fca9388e8c932d604b1b376a21ee7c99182665de

    SHA512

    ca8bb85f6c5cf9766806965d00d9ceaaa490fc93c88fa70de27542cd5520c428a48e9a91c912940858e4c3948f4bc362ce98c76a2e24099341c88f9e3a2289a3

  • C:\Windows\System32\profext\SppExtComObj.exe

    Filesize

    2.2MB

    MD5

    e25a39e4aa8226e61ad4d87ab202b075

    SHA1

    f788abc5eec5bcbb870dda8611be38ec974a72e6

    SHA256

    e6dc771e96a2b81593d3c25b081cebd16c173f906747286b8a803126805c7865

    SHA512

    1637af5e9f0df90bb108303356cfc63e96a4f6ef5a59de43a8dc974311f7f693f4734f0a69bd9aec02244d39a9d35de0a6d10b4d4c7553d98de5aefc633222f4

  • memory/3648-5-0x0000000002EC0000-0x0000000002ECC000-memory.dmp

    Filesize

    48KB

  • memory/3648-19-0x00007FFA03EC0000-0x00007FFA04981000-memory.dmp

    Filesize

    10.8MB

  • memory/3648-7-0x000000001B940000-0x000000001B996000-memory.dmp

    Filesize

    344KB

  • memory/3648-8-0x0000000002ED0000-0x0000000002EDA000-memory.dmp

    Filesize

    40KB

  • memory/3648-9-0x0000000002EE0000-0x0000000002EE8000-memory.dmp

    Filesize

    32KB

  • memory/3648-10-0x0000000002F00000-0x0000000002F0C000-memory.dmp

    Filesize

    48KB

  • memory/3648-11-0x0000000002F10000-0x0000000002F1C000-memory.dmp

    Filesize

    48KB

  • memory/3648-14-0x00007FFA03EC0000-0x00007FFA04981000-memory.dmp

    Filesize

    10.8MB

  • memory/3648-15-0x00007FFA03EC0000-0x00007FFA04981000-memory.dmp

    Filesize

    10.8MB

  • memory/3648-6-0x0000000002EF0000-0x0000000002EFA000-memory.dmp

    Filesize

    40KB

  • memory/3648-0-0x00007FFA03EC3000-0x00007FFA03EC5000-memory.dmp

    Filesize

    8KB

  • memory/3648-3-0x0000000002EA0000-0x0000000002EA8000-memory.dmp

    Filesize

    32KB

  • memory/3648-4-0x0000000002EB0000-0x0000000002EC0000-memory.dmp

    Filesize

    64KB

  • memory/3648-2-0x00007FFA03EC0000-0x00007FFA04981000-memory.dmp

    Filesize

    10.8MB

  • memory/3648-127-0x00007FFA03EC3000-0x00007FFA03EC5000-memory.dmp

    Filesize

    8KB

  • memory/3648-130-0x00007FFA03EC0000-0x00007FFA04981000-memory.dmp

    Filesize

    10.8MB

  • memory/3648-132-0x00007FFA03EC0000-0x00007FFA04981000-memory.dmp

    Filesize

    10.8MB

  • memory/3648-1-0x0000000000B00000-0x0000000000D42000-memory.dmp

    Filesize

    2.3MB