Analysis

  • max time kernel
    92s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-11-2024 23:31

General

  • Target

    6a424fb0461a71270d9994efea75bced7b4081a1fe16cdc6deb1a8f015e81773.exe

  • Size

    2.6MB

  • MD5

    0163b78fa3d6908eb367abed8f3e9e94

  • SHA1

    240609d82a62a8017ad3d81ac4271cd7606b5573

  • SHA256

    6a424fb0461a71270d9994efea75bced7b4081a1fe16cdc6deb1a8f015e81773

  • SHA512

    f0258f74d10b9d1f3cfab6c36afe7e411b9c3cea7641529b5fc3e62706787c9685b6dfccf3fdde708102b43f517a734572da77407f9f4f1d94754fdec1554748

  • SSDEEP

    49152:Z35SQwOGHHy3Gv6KelFCGDZPU542T5eYfn4jmnHwDKni5JsJ:ZpSQEHIKqFCGDZs54+5eYfnCMQ+i5Ja

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 12 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 4 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
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 10 IoCs
  • Drops file in Windows directory 5 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 12 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 6 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\6a424fb0461a71270d9994efea75bced7b4081a1fe16cdc6deb1a8f015e81773.exe
    "C:\Users\Admin\AppData\Local\Temp\6a424fb0461a71270d9994efea75bced7b4081a1fe16cdc6deb1a8f015e81773.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1112
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ca7xtVKtY7.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:8
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:5052
        • C:\Users\Public\AccountPictures\wininit.exe
          "C:\Users\Public\AccountPictures\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:548
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Google\upfc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4060
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3640
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Google\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3856
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\Program Files\Microsoft Office\root\Licenses\services.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2572
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\root\Licenses\services.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4648
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 13 /tr "'C:\Program Files\Microsoft Office\root\Licenses\services.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3800
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Windows\SKB\LanguageModels\Idle.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1376
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Windows\SKB\LanguageModels\Idle.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 "IdleI" /sc MINUTE /mo 11 /tr "'C:\Windows\SKB\LanguageModels\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1448
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\Users\Public\AccountPictures\wininit.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1896
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Users\Public\AccountPictures\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3984
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 13 /tr "'C:\Users\Public\AccountPictures\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2056

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files\Microsoft Office\root\Licenses\services.exe

      Filesize

      2.6MB

      MD5

      95c0b50984fc0ca2f19e5017b494ba57

      SHA1

      639caba709d321554a4299b24edca51afe989999

      SHA256

      e3370f2e8b6abffc7c3528712390e1730f4430f1d0011629c212ec059cb4c7fa

      SHA512

      567ec7eb56a55be9c6a0d7ee9cf01e2518d63fc952da24355780a91e4ec6a112c866c2a7cb26dadf28c49ae91ac5cc523fa972527066a361d4022e9926bb834a

    • C:\Users\Admin\AppData\Local\Temp\RCXB130.tmp

      Filesize

      2.6MB

      MD5

      c48a32fe9ab79809fd6921ec76072980

      SHA1

      974d3211e7e6b8a51025eab1a172d07068c8c8c4

      SHA256

      62e056d86cf91f172914969927d2306e52facc801903f08f8a9a1b49cd34a960

      SHA512

      385d9cbf1604a9ffa12b762b80f23f5a47517c8f2522c745af3ce2121da72fbc37b1dd88e5ba4733dbbaefd4fdbc823b5d9ed07b3584bba75e22b0445e85584f

    • C:\Users\Admin\AppData\Local\Temp\ca7xtVKtY7.bat

      Filesize

      208B

      MD5

      66221d17feb4c34dc49e44bf7c9cf099

      SHA1

      78b4d053c28f6dc8075f6b9308accf0f638db519

      SHA256

      2d09ab582ff80ecfa56a8d1b479265b9dbf8807f927cfaee3505419ec4b76426

      SHA512

      34f933029e8356d0823ec46e4d514de5f4ed0fc943d8d1d698c442e3decf53a46ce235619ba0496cb03cac435d8c328450c99f4001536bab319c74716cdee254

    • C:\Users\Public\AccountPictures\wininit.exe

      Filesize

      2.6MB

      MD5

      0163b78fa3d6908eb367abed8f3e9e94

      SHA1

      240609d82a62a8017ad3d81ac4271cd7606b5573

      SHA256

      6a424fb0461a71270d9994efea75bced7b4081a1fe16cdc6deb1a8f015e81773

      SHA512

      f0258f74d10b9d1f3cfab6c36afe7e411b9c3cea7641529b5fc3e62706787c9685b6dfccf3fdde708102b43f517a734572da77407f9f4f1d94754fdec1554748

    • memory/548-92-0x000000001B9F0000-0x000000001BA02000-memory.dmp

      Filesize

      72KB

    • memory/1112-12-0x000000001B070000-0x000000001B078000-memory.dmp

      Filesize

      32KB

    • memory/1112-19-0x000000001B5B0000-0x000000001B5BC000-memory.dmp

      Filesize

      48KB

    • memory/1112-10-0x000000001B4A0000-0x000000001B4AA000-memory.dmp

      Filesize

      40KB

    • memory/1112-11-0x000000001B530000-0x000000001B586000-memory.dmp

      Filesize

      344KB

    • memory/1112-8-0x000000001B040000-0x000000001B056000-memory.dmp

      Filesize

      88KB

    • memory/1112-7-0x000000001AEE0000-0x000000001AEF0000-memory.dmp

      Filesize

      64KB

    • memory/1112-6-0x000000001AED0000-0x000000001AED8000-memory.dmp

      Filesize

      32KB

    • memory/1112-0-0x00007FFEAEFA3000-0x00007FFEAEFA5000-memory.dmp

      Filesize

      8KB

    • memory/1112-13-0x000000001B490000-0x000000001B4A2000-memory.dmp

      Filesize

      72KB

    • memory/1112-14-0x000000001BEC0000-0x000000001C3E8000-memory.dmp

      Filesize

      5.2MB

    • memory/1112-17-0x000000001B590000-0x000000001B59C000-memory.dmp

      Filesize

      48KB

    • memory/1112-9-0x000000001B060000-0x000000001B068000-memory.dmp

      Filesize

      32KB

    • memory/1112-20-0x000000001B5C0000-0x000000001B5CA000-memory.dmp

      Filesize

      40KB

    • memory/1112-18-0x000000001B5A0000-0x000000001B5AE000-memory.dmp

      Filesize

      56KB

    • memory/1112-16-0x000000001B580000-0x000000001B588000-memory.dmp

      Filesize

      32KB

    • memory/1112-15-0x000000001B4D0000-0x000000001B4D8000-memory.dmp

      Filesize

      32KB

    • memory/1112-5-0x000000001B4E0000-0x000000001B530000-memory.dmp

      Filesize

      320KB

    • memory/1112-4-0x0000000002480000-0x000000000249C000-memory.dmp

      Filesize

      112KB

    • memory/1112-87-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

      Filesize

      10.8MB

    • memory/1112-3-0x0000000002460000-0x000000000246E000-memory.dmp

      Filesize

      56KB

    • memory/1112-2-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

      Filesize

      10.8MB

    • memory/1112-1-0x0000000000040000-0x00000000002E8000-memory.dmp

      Filesize

      2.7MB