Overview

overview

10

Static

static

10

040cef4a91...51.exe

windows7-x64

10

040cef4a91...51.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240910-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240910-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/09/2024, 01:02

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General

  • Target
    040cef4a919bf259e750029187dcfeff8b4b8f18e6a65cb401ee941d7999dd51.exe
  • Size 158KB
  • Sample240925-bdvaasycqd
  • SHA256 040cef4a919bf259e750029187dcfeff8b4b8f18e6a65cb401ee941d7999dd51
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
arrowratclientdiscoverypersistencerat

Malware Config

Extracted

Family

  • arrowrat

Botnet

  • Client

C2

  • 147.185.221.17:55141

Mutex

  • YnZwwlrYv

Signatures

  • ArrowRat

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

    ratarrowrat
  • 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
  • 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
  • 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 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of FindShellTrayWindow 49 IoCs
  • Suspicious use of SendNotifyMessage 21 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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\040cef4a919bf259e750029187dcfeff8b4b8f18e6a65cb401ee941d7999dd51.exe
    "C:\Users\Admin\AppData\Local\Temp\040cef4a919bf259e750029187dcfeff8b4b8f18e6a65cb401ee941d7999dd51.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2480
    • 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:1340
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.17 55141 YnZwwlrYv
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3776
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Suspicious use of SetWindowsHookEx
    PID:752
  • 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:464

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        AppCache133716997363264350.txt
        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133716997363264350.txt
        • Size 75KB
        • SHA256 4a42e3b48656a3dc5d1cc5128f0a7afd30a6e0d868432b4b4095b8c7247eee91
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/464-15-0x0000026420B00000-0x0000026420C00000-memory.dmp
        Download

        memory/464-32-0x0000026421C90000-0x0000026421CB0000-memory.dmp
        Download

        memory/464-41-0x00000264220A0000-0x00000264220C0000-memory.dmp
        Download

        memory/464-16-0x0000026420B00000-0x0000026420C00000-memory.dmp
        Download

        memory/464-17-0x0000026420B00000-0x0000026420C00000-memory.dmp
        Download

        memory/464-20-0x0000026421CD0000-0x0000026421CF0000-memory.dmp
        Download

        memory/1340-14-0x0000000003670000-0x0000000003671000-memory.dmp
        Download

        memory/2480-0-0x00007FFFF9F93000-0x00007FFFF9F95000-memory.dmp
        Download

        memory/2480-1-0x00000207AAEA0000-0x00000207AAECE000-memory.dmp
        Download

        memory/3776-10-0x0000000006080000-0x00000000060D0000-memory.dmp
        Download

        memory/3776-7-0x0000000005780000-0x00000000057E6000-memory.dmp
        Download

        memory/3776-6-0x0000000005880000-0x0000000005E24000-memory.dmp
        Download

        memory/3776-5-0x0000000005050000-0x00000000050EC000-memory.dmp
        Download

        memory/3776-4-0x0000000004FB0000-0x0000000005042000-memory.dmp
        Download

        memory/3776-2-0x0000000000400000-0x0000000000418000-memory.dmp
        Download