Overview

overview

10

Static

static

10

2f9e7eff2a...d1.exe

windows7-x64

10

2f9e7eff2a...d1.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/07/2024, 09:27

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General

  • Target
    2f9e7eff2a3dc88b9db2382875b0d3ad4241ac09e97e8d1d779a533a8fc1d8d1.exe
  • Size 63KB
  • Sample240713-le1htavgnm
  • SHA256 2f9e7eff2a3dc88b9db2382875b0d3ad4241ac09e97e8d1d779a533a8fc1d8d1
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

  • asyncrat

Botnet

  • Default

C2

  • 45.139.198.242:6606

Attributes
  • delay

    1

  • install

    true

  • install_file

    MicrosoftServices.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
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2f9e7eff2a3dc88b9db2382875b0d3ad4241ac09e97e8d1d779a533a8fc1d8d1.exe
    "C:\Users\Admin\AppData\Local\Temp\2f9e7eff2a3dc88b9db2382875b0d3ad4241ac09e97e8d1d779a533a8fc1d8d1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1240
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftServices" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2180
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftServices" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1584
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBB8F.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1668
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1920
      • C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe
        "C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1596

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        tmpBB8F.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmpBB8F.tmp.bat
        • Size 161B
        • SHA256 bcab10a48ef99fde0293bd843b45b0d435c7d997b6d3dd884fe9c48ae9de78f4
        • MD5 SHA1 SHA512
        Submit Download

        MicrosoftServices.exe
        • Path C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe
        • Size 63KB
        • SHA256 2f9e7eff2a3dc88b9db2382875b0d3ad4241ac09e97e8d1d779a533a8fc1d8d1
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/1240-0-0x0000000000010000-0x0000000000026000-memory.dmp
        Download

        memory/1240-1-0x00007FFC7FD73000-0x00007FFC7FD75000-memory.dmp
        Download

        memory/1240-2-0x00007FFC7FD70000-0x00007FFC80831000-memory.dmp
        Download

        memory/1240-7-0x00007FFC7FD70000-0x00007FFC80831000-memory.dmp
        Download