Overview

overview

10

Static

static

10

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    147s
  • max time network
    152s
  • 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
    df9d5a6d4edf1baf28fe59cc742cb980dfba7613a17b50c5a75f3fdd756bbc54.exe
  • Size 74KB
  • Sample240804-n5eedayfjc
  • SHA256 df9d5a6d4edf1baf28fe59cc742cb980dfba7613a17b50c5a75f3fdd756bbc54
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
asyncratrat

Malware Config

Extracted

Family

  • asyncrat

Version

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

C2

  • 94.156.69.242:5000

Mutex

  • rufrwqqzhtx

Attributes
  • delay

    1

  • install

    true

  • install_file

    WinUpdate.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 26 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\df9d5a6d4edf1baf28fe59cc742cb980dfba7613a17b50c5a75f3fdd756bbc54.exe
    "C:\Users\Admin\AppData\Local\Temp\df9d5a6d4edf1baf28fe59cc742cb980dfba7613a17b50c5a75f3fdd756bbc54.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2180
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4544
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4088
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp736B.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1652
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1444
      • C:\Users\Admin\AppData\Roaming\WinUpdate.exe
        "C:\Users\Admin\AppData\Roaming\WinUpdate.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:3644

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        tmp736B.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp736B.tmp.bat
        • Size 153B
        • SHA256 bc482cc1b469a54c153ad84c01f15744710e583d4b6b03a969b11d56e115f3c5
        • 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

        WinUpdate.exe
        • Path C:\Users\Admin\AppData\Roaming\WinUpdate.exe
        • Size 74KB
        • SHA256 df9d5a6d4edf1baf28fe59cc742cb980dfba7613a17b50c5a75f3fdd756bbc54
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/2180-0-0x00007FF944ED3000-0x00007FF944ED5000-memory.dmp
        Download

        memory/2180-1-0x00000000006C0000-0x00000000006D8000-memory.dmp
        Download

        memory/2180-3-0x00007FF944ED0000-0x00007FF945992000-memory.dmp
        Download

        memory/2180-4-0x00007FF944ED0000-0x00007FF945992000-memory.dmp
        Download

        memory/2180-9-0x00007FF944ED0000-0x00007FF945992000-memory.dmp
        Download