Overview

overview

10

Static

static

10

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    125s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    04/08/2024, 11:58

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General

  • Target
    2a5dac302572ede5da5d53df170d5882937027b58290b6ea60e24478453276c9.exe
  • Size 204KB
  • Sample240804-n5l48ayflb
  • SHA256 2a5dac302572ede5da5d53df170d5882937027b58290b6ea60e24478453276c9
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
asyncratrat

Malware Config

Extracted

Family

  • asyncrat

Version

  • Venom RAT + HVNC + Stealer + Grabber v6.0.3

Mutex

  • ewhzrclekutersfjwb

Attributes
  • delay

    1

  • install

    true

  • install_file

    Update.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Async RAT payload 1 IoCs
    rat
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2a5dac302572ede5da5d53df170d5882937027b58290b6ea60e24478453276c9.exe
    "C:\Users\Admin\AppData\Local\Temp\2a5dac302572ede5da5d53df170d5882937027b58290b6ea60e24478453276c9.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:748
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Update" /tr '"C:\Users\Admin\AppData\Roaming\Update.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3572
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Update" /tr '"C:\Users\Admin\AppData\Roaming\Update.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:236
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8916.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2680
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:712
      • C:\Users\Admin\AppData\Roaming\Update.exe
        "C:\Users\Admin\AppData\Roaming\Update.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:864

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        tmp8916.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp8916.tmp.bat
        • Size 150B
        • SHA256 30474f192618ed1164d747067d047a1555ccbac7328bcb50ff68a6e578d4152a
        • MD5 SHA1 SHA512
        Submit Download

        DataLogs.conf
        • Path C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
        • Size 8B
        • SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
        • MD5 SHA1 SHA512
        Submit Download

        Update.exe
        • Path C:\Users\Admin\AppData\Roaming\Update.exe
        • Size 204KB
        • SHA256 2a5dac302572ede5da5d53df170d5882937027b58290b6ea60e24478453276c9
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/748-0-0x00007FFBD72C3000-0x00007FFBD72C5000-memory.dmp
        Download

        memory/748-1-0x0000000000820000-0x0000000000858000-memory.dmp
        Download

        memory/748-3-0x00007FFBD72C0000-0x00007FFBD7D82000-memory.dmp
        Download

        memory/748-4-0x00007FFBD72C0000-0x00007FFBD7D82000-memory.dmp
        Download

        memory/748-9-0x00007FFBD72C0000-0x00007FFBD7D82000-memory.dmp
        Download