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
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-01-2025 04:55

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General

  • Target

    Client.exe

  • Size

    158KB

  • MD5

    d8fdc3e470f0d242e52ba6d2678749d0

  • SHA1

    3d33f93355bfe9f1575219cc73485d67371ef1a0

  • SHA256

    c5d3e50be9fa5152dcb8855ec98bb0432a02f123d1493c84cc56b9f880517717

  • SHA512

    cc2c8c728e7de468cbc58dda017cc2f847e9b04e55211a0a351a6aed3d21681a7225fb24d60d410e49489da4966819c316e9401021f747c2ee706d4fecb98bf6

  • SSDEEP

    3072:rbziH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfPJRO8Y:rbzie0ODhTEPgnjuIJzo+PPcfPJc8

Score
10/10
arrowratclientdiscoverypersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

understanding-described.gl.at.ply.gg:3953

Mutex

UmvLBIzwz

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
  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 33 IoCs
  • Suspicious use of FindShellTrayWindow 49 IoCs
  • Suspicious use of SendNotifyMessage 21 IoCs
  • Suspicious use of SetWindowsHookEx 3 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\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1168
    • 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:2216
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client understanding-described.gl.at.ply.gg 3953 UmvLBIzwz
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1428
  • 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:2680
  • 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:3908

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\AppCache133826132871582845.txt
    Filesize

    75KB

    MD5

    e268b3dbdd62cb6b650007bd3788473a

    SHA1

    3b154bab5dfecaeec35ce96af3f0d8912153e099

    SHA256

    f33f71040a000dc4b8820103bb5a176d8394107fc393e0a6ae0eb9edbb6c7016

    SHA512

    4e604ffe64dc78e19d4451c0a325c7dac0d50fb5b1fc869b2631ae6891b40091a27da83c51f02d04137dbc55b1cd6de20fd5b0cea85261d2e7b96235b76f9c62

    Download Submit

  • memory/1168-0-0x00007FF8BE713000-0x00007FF8BE715000-memory.dmp

    Filesize

    8KB

    Download

  • memory/1168-1-0x0000019753F50000-0x0000019753F7E000-memory.dmp

    Filesize

    184KB

    Download

  • memory/1168-4-0x00007FF8BE710000-0x00007FF8BF1D1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/1168-164-0x00007FF8BE710000-0x00007FF8BF1D1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/1428-7-0x0000000005900000-0x0000000005EA4000-memory.dmp

    Filesize

    5.6MB

    Download

  • memory/1428-6-0x00000000050C0000-0x000000000515C000-memory.dmp

    Filesize

    624KB

    Download

  • memory/1428-11-0x00000000060B0000-0x0000000006100000-memory.dmp

    Filesize

    320KB

    Download

  • memory/1428-8-0x0000000005840000-0x00000000058A6000-memory.dmp

    Filesize

    408KB

    Download

  • memory/1428-5-0x0000000004FA0000-0x0000000005032000-memory.dmp

    Filesize

    584KB

    Download

  • memory/1428-2-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

    Download

  • memory/2216-14-0x0000000002F50000-0x0000000002F51000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3908-21-0x00000146B4060000-0x00000146B4080000-memory.dmp

    Filesize

    128KB

    Download

  • memory/3908-51-0x00000146B4020000-0x00000146B4040000-memory.dmp

    Filesize

    128KB

    Download

  • memory/3908-52-0x00000146B4430000-0x00000146B4450000-memory.dmp

    Filesize

    128KB

    Download