Overview

overview

10

Static

static

10

8573d9e75f...cb.exe

windows10-2004-x64

10

8573d9e75f...cb.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    143s
  • platform
    windows11-21h2_x64
  • resource
    win11-20251015-en
  • resource tags

    arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    02/12/2025, 07:27

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General

  • Target
    8573d9e75f2c0ef4e69023fc07bee9cb.exe
  • Size 91KB
  • Sample251202-h94beadj4t
  • SHA256 e5d590f782337416fe7f93aa7f488419f86802500d05ef2fced4ccca7f4e14ae
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
tydiscoveryarrowratpersistenceransomwarerat

Malware Config

Extracted

Family

  • arrowrat

Botnet

  • TY

C2

  • 91.134.207.23:5337

Mutex

  • DFDFrcvff45thfgh4t44gjahdfhhhhca

Signatures

  • ArrowRat

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

    ratarrowrat
  • Arrowrat family
    arrowrat
  • 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 2 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 14 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of FindShellTrayWindow 28 IoCs
  • Suspicious use of SendNotifyMessage 23 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 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\8573d9e75f2c0ef4e69023fc07bee9cb.exe
    "C:\Users\Admin\AppData\Local\Temp\8573d9e75f2c0ef4e69023fc07bee9cb.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5564
    • 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:2796
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" TY 91.134.207.23 5337 DFDFrcvff45thfgh4t44gjahdfhhhhca
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4208
  • 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:4772

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        memory/4208-3-0x0000000000400000-0x0000000000410000-memory.dmp
        Download

        memory/4208-5-0x00000000055D0000-0x0000000005662000-memory.dmp
        Download

        memory/5564-0-0x0000000000300000-0x000000000031E000-memory.dmp
        Download

        memory/5564-1-0x0000000005170000-0x0000000005716000-memory.dmp
        Download

        memory/5564-2-0x0000000004DA0000-0x0000000004E3C000-memory.dmp
        Download