Analysis

  • max time kernel
    103s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    19-01-2025 14:27

General

  • Target

    40a25f4406c2c119fdbee6a530b4dbd78dfad9e98eb0ac785290997976d75d7dN.exe

  • Size

    2.7MB

  • MD5

    8e6d3e4cdb00a133fd3f33cfde6e37c0

  • SHA1

    91233309e54797dac7c00a9576c38456bc14acba

  • SHA256

    40a25f4406c2c119fdbee6a530b4dbd78dfad9e98eb0ac785290997976d75d7d

  • SHA512

    a1604b3da2eb2dfec99ed830eaa8077e0ba2b2f66c377bf8c1bdea8e8668f2bee7fa90411fdd62f358f1be87ae58dd5e1de71a58f46428550c64262664c671a6

  • SSDEEP

    49152:sqyJUSQelMhlk1w19BlUobhENGZXxRWi0UAuqYqqnc:pyJlQgGk1wPko1oO30UA7Yqq

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 15 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
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 10 IoCs
  • Drops file in Windows directory 10 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 15 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 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\40a25f4406c2c119fdbee6a530b4dbd78dfad9e98eb0ac785290997976d75d7dN.exe
    "C:\Users\Admin\AppData\Local\Temp\40a25f4406c2c119fdbee6a530b4dbd78dfad9e98eb0ac785290997976d75d7dN.exe"
    1⤵
    • UAC bypass
    • 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:2520
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\PFUyiEWIAf.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2160
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:2140
        • C:\Program Files\Windows Defender\ja-JP\wininit.exe
          "C:\Program Files\Windows Defender\ja-JP\wininit.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:1988
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 9 /tr "'C:\Windows\inf\TermService\0409\audiodg.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2884
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\Windows\inf\TermService\0409\audiodg.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2752
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 6 /tr "'C:\Windows\inf\TermService\0409\audiodg.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 "explorere" /sc MINUTE /mo 6 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\explorer.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2892
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2952
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorere" /sc MINUTE /mo 11 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Defender\ja-JP\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2356
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\ja-JP\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2628
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Defender\ja-JP\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2716
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Microsoft Sync Framework\v1.0\Runtime\x86\resources\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2304
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Sync Framework\v1.0\Runtime\x86\resources\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1232
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Microsoft Sync Framework\v1.0\Runtime\x86\resources\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 6 /tr "'C:\Windows\twain_32\taskhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1856
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\twain_32\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:784
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 11 /tr "'C:\Windows\twain_32\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1980

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      216B

      MD5

      598d0cf5f5b0f0a09bc3fa4876abd16d

      SHA1

      669f3f83f2ee280d2b8e1c4dc17d4fb59d451ad1

      SHA256

      1701cc87c8be77f0476d4b251e042a0e0962d6644d10f51833bc6652ad0a6cc0

      SHA512

      a649fbb230ee2618b3cb4d234c5a2ac3ecd66ed85caf22f9a64e4f6981a2d27564d9b4d29f2a8f0becfcb25db851e9a1d9b81742fef6428c5cc74af0196bee0b

    • C:\Windows\twain_32\taskhost.exe

      Filesize

      2.7MB

      MD5

      8e6d3e4cdb00a133fd3f33cfde6e37c0

      SHA1

      91233309e54797dac7c00a9576c38456bc14acba

      SHA256

      40a25f4406c2c119fdbee6a530b4dbd78dfad9e98eb0ac785290997976d75d7d

      SHA512

      a1604b3da2eb2dfec99ed830eaa8077e0ba2b2f66c377bf8c1bdea8e8668f2bee7fa90411fdd62f358f1be87ae58dd5e1de71a58f46428550c64262664c671a6

    • memory/1988-104-0x0000000000A70000-0x0000000000D24000-memory.dmp

      Filesize

      2.7MB

    • memory/2520-12-0x00000000005E0000-0x00000000005F2000-memory.dmp

      Filesize

      72KB

    • memory/2520-13-0x0000000000690000-0x0000000000698000-memory.dmp

      Filesize

      32KB

    • memory/2520-5-0x0000000000470000-0x0000000000478000-memory.dmp

      Filesize

      32KB

    • memory/2520-6-0x0000000000480000-0x0000000000490000-memory.dmp

      Filesize

      64KB

    • memory/2520-7-0x0000000000490000-0x00000000004A6000-memory.dmp

      Filesize

      88KB

    • memory/2520-8-0x00000000004B0000-0x00000000004B8000-memory.dmp

      Filesize

      32KB

    • memory/2520-9-0x00000000005D0000-0x00000000005DA000-memory.dmp

      Filesize

      40KB

    • memory/2520-10-0x0000000000CF0000-0x0000000000D46000-memory.dmp

      Filesize

      344KB

    • memory/2520-11-0x00000000005C0000-0x00000000005C8000-memory.dmp

      Filesize

      32KB

    • memory/2520-0-0x000007FEF53E3000-0x000007FEF53E4000-memory.dmp

      Filesize

      4KB

    • memory/2520-14-0x00000000006A0000-0x00000000006A8000-memory.dmp

      Filesize

      32KB

    • memory/2520-4-0x0000000000450000-0x000000000046C000-memory.dmp

      Filesize

      112KB

    • memory/2520-15-0x0000000000D40000-0x0000000000D4C000-memory.dmp

      Filesize

      48KB

    • memory/2520-16-0x0000000000D50000-0x0000000000D5E000-memory.dmp

      Filesize

      56KB

    • memory/2520-17-0x0000000000D60000-0x0000000000D6C000-memory.dmp

      Filesize

      48KB

    • memory/2520-18-0x0000000000D70000-0x0000000000D7A000-memory.dmp

      Filesize

      40KB

    • memory/2520-19-0x0000000000D80000-0x0000000000D8C000-memory.dmp

      Filesize

      48KB

    • memory/2520-3-0x00000000002C0000-0x00000000002CE000-memory.dmp

      Filesize

      56KB

    • memory/2520-100-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

      Filesize

      9.9MB

    • memory/2520-2-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

      Filesize

      9.9MB

    • memory/2520-1-0x0000000001310000-0x00000000015C4000-memory.dmp

      Filesize

      2.7MB