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Analysis

  • max time kernel
    119s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17/05/2024, 14:44

General

  • Target

    Tax documents PDF.exe

  • Size

    31KB

  • MD5

    4db45c5fdb9e115b922bdf007523f082

  • SHA1

    90297382a170ff3ea7931db2425329d0b2f70f04

  • SHA256

    a73709c1b5f1f875ee35f477c4e263a57050c36e2cff31ad1ceca17d9623e7cd

  • SHA512

    7f0bcb2ee96c523cce764d1ec7d197d3aadddcf6fae71b63e88c3a26883b2f2fb4a446187adfbb023be779056ebc0ea50a785c72bbe97bb7dca41a810d0ff6c7

  • SSDEEP

    384:V4Kj/M8y6ryzqEt7a9Oey+IFdP64VYaEwDtiBgxoxlnLr2STchsCxXBhgBx4eMDg:VHDXr+VWOV+csoHViBBn+hRIqeMDGt

Malware Config

Extracted

Family

asyncrat

Version

5.0.5

Botnet

Venom Clients

C2

5.253.84.218:7878

Mutex

Venom_RAT_HVNC_Mutex_Venom RAT_HVNC

Attributes
  • delay

    1

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Tax documents PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\Tax documents PDF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1944
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1008
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\ChromeData.dll",EntryPoint /f & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2612
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\ChromeData.dll",EntryPoint /f
        3⤵
        • Adds Run key to start application
        PID:2704

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/1008-5-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

    Filesize

    4KB

  • memory/1008-32-0x0000000073B5E000-0x0000000073B5F000-memory.dmp

    Filesize

    4KB

  • memory/1008-13-0x0000000073B5E000-0x0000000073B5F000-memory.dmp

    Filesize

    4KB

  • memory/1008-4-0x0000000000080000-0x0000000000096000-memory.dmp

    Filesize

    88KB

  • memory/1008-7-0x0000000000080000-0x0000000000096000-memory.dmp

    Filesize

    88KB

  • memory/1008-10-0x0000000000080000-0x0000000000096000-memory.dmp

    Filesize

    88KB

  • memory/1008-12-0x0000000000080000-0x0000000000096000-memory.dmp

    Filesize

    88KB

  • memory/1944-2-0x0000000010000000-0x0000000012D6D000-memory.dmp

    Filesize

    45.4MB

  • memory/1944-1-0x00000000102E6000-0x0000000010300000-memory.dmp

    Filesize

    104KB

  • memory/1944-8-0x0000000010000000-0x0000000012D6D000-memory.dmp

    Filesize

    45.4MB

  • memory/1944-0-0x0000000010000000-0x0000000012D6D000-memory.dmp

    Filesize

    45.4MB

  • memory/1944-14-0x0000000012D41000-0x0000000012D6D000-memory.dmp

    Filesize

    176KB

  • memory/1944-3-0x0000000010000000-0x0000000012D6D000-memory.dmp

    Filesize

    45.4MB