Analysis

  • max time kernel
    121s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20250207-en
  • resource tags

    arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system
  • submitted
    22/03/2025, 06:25

General

  • Target

    3e435c9ff25f6dca4a3e7262825aa557.exe

  • Size

    984KB

  • MD5

    3e435c9ff25f6dca4a3e7262825aa557

  • SHA1

    57cb6e337e1c91c2937544fdfa78d3704d2ff408

  • SHA256

    db97ef403b3433d2cae1fc98d893d14e67b83a14e7d8e4e428152fde8d83d934

  • SHA512

    00c0863dc6728e01cddb5c605d1210c0d1c2b7bf7b4e2426f61bb2b6eb4addb102c7ef5d46db693557b3e8dcf4d68a33ddcfe499713666afd05d986b5be9ebe8

  • SSDEEP

    12288:LzZvuvewk/0pPPXA5q/TQ9+n95vV25gnwHexSDwbwvDxlpaS98IUNldnd65EgF1s:LzZvuGD2PvA5YxwmbZB6Uv

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 3 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 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\3e435c9ff25f6dca4a3e7262825aa557.exe
    "C:\Users\Admin\AppData\Local\Temp\3e435c9ff25f6dca4a3e7262825aa557.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2536
    • C:\Windows\System32\C_1361\dwm.exe
      "C:\Windows\System32\C_1361\dwm.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:308
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\System32\C_1361\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2196
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPWMI\OSPPSVC.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2888
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0018-0409-0000-0000000FF1CE}-C\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2164

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windows\System32\C_1361\dwm.exe

    Filesize

    984KB

    MD5

    3e435c9ff25f6dca4a3e7262825aa557

    SHA1

    57cb6e337e1c91c2937544fdfa78d3704d2ff408

    SHA256

    db97ef403b3433d2cae1fc98d893d14e67b83a14e7d8e4e428152fde8d83d934

    SHA512

    00c0863dc6728e01cddb5c605d1210c0d1c2b7bf7b4e2426f61bb2b6eb4addb102c7ef5d46db693557b3e8dcf4d68a33ddcfe499713666afd05d986b5be9ebe8

  • memory/308-46-0x0000000000A40000-0x0000000000B3C000-memory.dmp

    Filesize

    1008KB

  • memory/2536-6-0x0000000000280000-0x0000000000288000-memory.dmp

    Filesize

    32KB

  • memory/2536-3-0x0000000000140000-0x000000000015C000-memory.dmp

    Filesize

    112KB

  • memory/2536-4-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2536-5-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2536-0-0x000007FEF5973000-0x000007FEF5974000-memory.dmp

    Filesize

    4KB

  • memory/2536-7-0x00000000004A0000-0x00000000004B0000-memory.dmp

    Filesize

    64KB

  • memory/2536-8-0x0000000000490000-0x000000000049C000-memory.dmp

    Filesize

    48KB

  • memory/2536-9-0x00000000004B0000-0x00000000004C2000-memory.dmp

    Filesize

    72KB

  • memory/2536-10-0x00000000004C0000-0x00000000004CC000-memory.dmp

    Filesize

    48KB

  • memory/2536-2-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

    Filesize

    9.9MB

  • memory/2536-1-0x0000000000180000-0x000000000027C000-memory.dmp

    Filesize

    1008KB

  • memory/2536-47-0x000007FEF5970000-0x000007FEF635C000-memory.dmp

    Filesize

    9.9MB