Analysis

  • max time kernel
    93s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-07-2024 16:00

General

  • Target

    MalwareBazaar.exe

  • Size

    2.0MB

  • MD5

    6e4e01af6b88116f0c7331bba5e7b782

  • SHA1

    756c0a5ea8aac86f41d118166452a011a608043c

  • SHA256

    5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147

  • SHA512

    f49b6146f313624606a9eb80287c23c68aaefcf7ffafacba83a87b333b4388dd38a423a179b7bcb0e1d555873681b405c781faf68e2d7169fa7bcefe4a73874b

  • SSDEEP

    24576:jYe7C5QSBzoU/n15NuQtG+7IwzwT2wLqq12OBOa2WYO3QFSBztYSqEEU5oZUSzTO:jYemPM0tvmwGBF223ZztBqEqx9v

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Modifies WinLogon for persistence 2 TTPs 5 IoCs
  • Process spawned unexpected child process 15 IoCs

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

  • DCRat payload 2 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 10 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 6 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 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 2 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\MalwareBazaar.exe
    "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1228
    • C:\Windows\Help\en-US\MalwareBazaar.exe
      "C:\Windows\Help\en-US\MalwareBazaar.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2620
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\it-IT\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4916
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\it-IT\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2712
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\it-IT\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4320
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 14 /tr "'C:\Windows\schemas\fontdrvhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1444
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\schemas\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1260
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Windows\schemas\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1132
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\3D Objects\unsecapp.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3996
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Users\Admin\3D Objects\unsecapp.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1904
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\3D Objects\unsecapp.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4636
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Windows\apppatch\it-IT\RuntimeBroker.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:644
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\apppatch\it-IT\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3652
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Windows\apppatch\it-IT\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1308
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "MalwareBazaarM" /sc MINUTE /mo 7 /tr "'C:\Windows\Help\en-US\MalwareBazaar.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4608
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "MalwareBazaar" /sc ONLOGON /tr "'C:\Windows\Help\en-US\MalwareBazaar.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1508
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "MalwareBazaarM" /sc MINUTE /mo 7 /tr "'C:\Windows\Help\en-US\MalwareBazaar.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3816

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    1KB

    MD5

    7f3c0ae41f0d9ae10a8985a2c327b8fb

    SHA1

    d58622bf6b5071beacf3b35bb505bde2000983e3

    SHA256

    519fceae4d0dd4d09edd1b81bcdfa8aeab4b59eee77a4cd4b6295ce8e591a900

    SHA512

    8a8fd17eef071f86e672cba0d8fc2cfed6118aff816100b9d7c06eb96443c04c04bc5692259c8d7ecb1563e877921939c61726605af4f969e3f586f0913ed125

  • C:\Windows\Help\en-US\MalwareBazaar.exe

    Filesize

    2.0MB

    MD5

    6e4e01af6b88116f0c7331bba5e7b782

    SHA1

    756c0a5ea8aac86f41d118166452a011a608043c

    SHA256

    5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147

    SHA512

    f49b6146f313624606a9eb80287c23c68aaefcf7ffafacba83a87b333b4388dd38a423a179b7bcb0e1d555873681b405c781faf68e2d7169fa7bcefe4a73874b

  • memory/1228-6-0x0000000003400000-0x000000000340C000-memory.dmp

    Filesize

    48KB

  • memory/1228-3-0x0000000001AC0000-0x0000000001ACE000-memory.dmp

    Filesize

    56KB

  • memory/1228-4-0x00000000033A0000-0x00000000033A8000-memory.dmp

    Filesize

    32KB

  • memory/1228-5-0x00000000033B0000-0x0000000003406000-memory.dmp

    Filesize

    344KB

  • memory/1228-0-0x00007FFCD2353000-0x00007FFCD2355000-memory.dmp

    Filesize

    8KB

  • memory/1228-7-0x0000000003410000-0x000000000341C000-memory.dmp

    Filesize

    48KB

  • memory/1228-8-0x0000000001A70000-0x0000000001A7C000-memory.dmp

    Filesize

    48KB

  • memory/1228-11-0x00007FFCD2350000-0x00007FFCD2E11000-memory.dmp

    Filesize

    10.8MB

  • memory/1228-12-0x00007FFCD2350000-0x00007FFCD2E11000-memory.dmp

    Filesize

    10.8MB

  • memory/1228-2-0x00007FFCD2350000-0x00007FFCD2E11000-memory.dmp

    Filesize

    10.8MB

  • memory/1228-32-0x00007FFCD2350000-0x00007FFCD2E11000-memory.dmp

    Filesize

    10.8MB

  • memory/1228-1-0x0000000000F60000-0x000000000116E000-memory.dmp

    Filesize

    2.1MB