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
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-06-2024 21:14

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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 and hide display window.

    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.

  • 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 Internet Explorer settings 1 TTPs 2 IoCs
    adwarespyware
  • Modifies registry class 41 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 26 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 14 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:392
    • 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:2868
    • 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:968
      • C:\Windows\System32\ComputerDefaults.exe
        "C:\Windows\System32\ComputerDefaults.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3228
        • 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:3704
    • 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:2572
    • 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:4112

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133632189219577474.txt
      Filesize

      75KB

      MD5

      05fa5607e20be67927abe12096c29d21

      SHA1

      2f8cf68a1e1ba204c7fbbcef401cbff9de2b3fa1

      SHA256

      8bb8553fa383680110cea7da6612fcd86dee633000554e5cb92425d57cef617a

      SHA512

      edee1fd4cf31f882fcd7ff99839a093cecc1db7255a6d53e84b991ff60f3a7eb471c079b44ebccf493ce10ccfe97a0916b246a9d65598099206645414b89352c

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_auaqate4.txy.ps1
      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      Download Submit

    • memory/392-13-0x00007FF841560000-0x00007FF842021000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/392-1-0x00007FF841563000-0x00007FF841565000-memory.dmp

      Filesize

      8KB

      Download

    • memory/392-205-0x00007FF841560000-0x00007FF842021000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/392-0-0x00000264F9790000-0x00000264F97BE000-memory.dmp

      Filesize

      184KB

      Download

    • memory/968-5-0x0000000004DF0000-0x0000000004E8C000-memory.dmp

      Filesize

      624KB

      Download

    • memory/968-10-0x0000000005E60000-0x0000000005EB0000-memory.dmp

      Filesize

      320KB

      Download

    • memory/968-7-0x00000000055A0000-0x0000000005606000-memory.dmp

      Filesize

      408KB

      Download

    • memory/968-6-0x0000000005620000-0x0000000005BC4000-memory.dmp

      Filesize

      5.6MB

      Download

    • memory/968-4-0x0000000004D50000-0x0000000004DE2000-memory.dmp

      Filesize

      584KB

      Download

    • memory/968-2-0x0000000000400000-0x0000000000418000-memory.dmp

      Filesize

      96KB

      Download

    • memory/2868-28-0x0000000002970000-0x0000000002971000-memory.dmp

      Filesize

      4KB

      Download

    • memory/3704-25-0x000001DC74830000-0x000001DC74852000-memory.dmp

      Filesize

      136KB

      Download

    • memory/4112-31-0x000002B53D200000-0x000002B53D300000-memory.dmp

      Filesize

      1024KB

      Download

    • memory/4112-30-0x000002B53D200000-0x000002B53D300000-memory.dmp

      Filesize

      1024KB

      Download

    • memory/4112-35-0x000002B53E160000-0x000002B53E180000-memory.dmp

      Filesize

      128KB

      Download

    • memory/4112-45-0x000002B53E120000-0x000002B53E140000-memory.dmp

      Filesize

      128KB

      Download

    • memory/4112-57-0x000002B53E740000-0x000002B53E760000-memory.dmp

      Filesize

      128KB

      Download