Overview

overview

10

Static

static

10

Client.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    220s
  • max time network
    220s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24-12-2024 04:46

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General

  • Target

    Client.exe

  • Size

    73KB

  • MD5

    16df4c5cd796674b00ce1057951723de

  • SHA1

    b3e9b12be9137cbe47be8efc0cafe41ff5a1a8a9

  • SHA256

    831e0d88c9a9e96dc0ce0b979ca353ec40925673f3fcc51267d9d1a6cdc11a33

  • SHA512

    770a8ce19d10ab145ae1751c3f4fb7d6fe041fe451a30eee3856e6ddaff6bfa0bea79c1f023e56993ae7ba3d5718bcdd78b4acc22f6badf31ec75f081e65cc6f

  • SSDEEP

    1536:wULkcxVKpC6yPMVKe9VdQkhDIyH1bf/S6xb2SQzc33VclN:wUocxVENyPMVKe9VdQgH1bfKG2SQSlY

Score
10/10
asyncratdefaultdiscoverypersistencerat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Mutex

zabblfdkiqcnixcr

Attributes
  • delay

    1

  • install

    false

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/sG1KxVNw

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

    ratasyncrat
  • Asyncrat family
    asyncrat
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Enumerates connected drives 3 TTPs 3 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 22 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies registry class 18 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of FindShellTrayWindow 50 IoCs
  • Suspicious use of SendNotifyMessage 62 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Enumerates connected drives
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3348
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4008
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Default NIGGERLOVER63-54128.portmap.host 4448 HVNC_MUTEX
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1620
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2092
  • C:\Windows\system32\BackgroundTransferHost.exe
    "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
    1⤵
    • Modifies registry class
    PID:4764
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
    1⤵
      PID:984
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DisplayEnhancementService
      1⤵
        PID:760
      • C:\Windows\system32\AUDIODG.EXE
        C:\Windows\system32\AUDIODG.EXE 0x00000000000004C4 0x00000000000004E4
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:5008

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\f20d1e9c-44a0-4d37-9ce9-005620e4b5eb.down_data
        Filesize

        555KB

        MD5

        5683c0028832cae4ef93ca39c8ac5029

        SHA1

        248755e4e1db552e0b6f8651b04ca6d1b31a86fb

        SHA256

        855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e

        SHA512

        aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3

        Download Submit

      • memory/1620-18-0x0000000000400000-0x0000000000410000-memory.dmp

        Filesize

        64KB

        Download

      • memory/1620-21-0x0000000005CD0000-0x0000000006276000-memory.dmp

        Filesize

        5.6MB

        Download

      • memory/1620-20-0x0000000005450000-0x00000000054EC000-memory.dmp

        Filesize

        624KB

        Download

      • memory/1620-19-0x00000000053B0000-0x0000000005442000-memory.dmp

        Filesize

        584KB

        Download

      • memory/3348-10-0x00007FFD38193000-0x00007FFD38195000-memory.dmp

        Filesize

        8KB

        Download

      • memory/3348-9-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

        Filesize

        10.8MB

        Download

      • memory/3348-11-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

        Filesize

        10.8MB

        Download

      • memory/3348-12-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

        Filesize

        10.8MB

        Download

      • memory/3348-13-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

        Filesize

        10.8MB

        Download

      • memory/3348-14-0x00000000206D0000-0x0000000020746000-memory.dmp

        Filesize

        472KB

        Download

      • memory/3348-15-0x0000000002D10000-0x0000000002D1E000-memory.dmp

        Filesize

        56KB

        Download

      • memory/3348-16-0x000000001BC90000-0x000000001BCAE000-memory.dmp

        Filesize

        120KB

        Download

      • memory/3348-17-0x0000000020650000-0x0000000020670000-memory.dmp

        Filesize

        128KB

        Download

      • memory/3348-0-0x00007FFD38193000-0x00007FFD38195000-memory.dmp

        Filesize

        8KB

        Download

      • memory/3348-8-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

        Filesize

        10.8MB

        Download

      • memory/3348-4-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

        Filesize

        10.8MB

        Download

      • memory/3348-3-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

        Filesize

        10.8MB

        Download

      • memory/3348-1-0x00000000000D0000-0x00000000000E6000-memory.dmp

        Filesize

        88KB

        Download

      • memory/3348-29-0x000000001BCF0000-0x000000001BCFE000-memory.dmp

        Filesize

        56KB

        Download

      • memory/3348-32-0x0000000020860000-0x000000002086D000-memory.dmp

        Filesize

        52KB

        Download

      • memory/3348-31-0x0000000020670000-0x00000000206B6000-memory.dmp

        Filesize

        280KB

        Download

      • memory/3348-34-0x0000000020890000-0x000000002089B000-memory.dmp

        Filesize

        44KB

        Download

      • memory/3348-33-0x0000000020870000-0x000000002088E000-memory.dmp

        Filesize

        120KB

        Download

      • memory/3348-51-0x000000001EE50000-0x000000001EE60000-memory.dmp

        Filesize

        64KB

        Download