Overview

overview

10

Static

static

10

Client.exe

windows10-ltsc 2021-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    07-12-2024 11:14

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General

  • Target

    Client.exe

  • Size

    158KB

  • MD5

    36ab548437e027b2a9c21c6f3d48d8a5

  • SHA1

    313bb9928462f8af38f29a2795bcf343cd463931

  • SHA256

    02226ca30c6b957fdf3a45bebd3cd328034c106ea8438891012aeec83bd4bdd2

  • SHA512

    87f391c184a59a126ec2188e2c5e7f00de1f8ff5f859bf3e218158f136ac24dccfff24b6a9d7da7670f04d5efe00b8056db9b76abdcb363c56450330203537a7

  • SSDEEP

    3072:hbzsH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfP4qO8Y:hbzse0ODhTEPgnjuIJzo+PPcfP4V8

Score
10/10
arrowratclientdiscoverypersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

193.161.193.99:14679

Mutex

wKuPZSZMR

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 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 25 IoCs
  • Suspicious use of FindShellTrayWindow 56 IoCs
  • Suspicious use of SendNotifyMessage 23 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⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1100
    • 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:1696
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 193.161.193.99 14679 wKuPZSZMR
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2000
  • 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:1332
  • 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:660

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\AppIconCache\100\Microsoft_AutoGenerated_{2F519BF2-C697-59F8-8F6A-1E19509CE66B}
    Filesize

    36KB

    MD5

    8aaad0f4eb7d3c65f81c6e6b496ba889

    SHA1

    231237a501b9433c292991e4ec200b25c1589050

    SHA256

    813c66ce7dec4cff9c55fb6f809eab909421e37f69ff30e4acaa502365a32bd1

    SHA512

    1a83ce732dc47853bf6e8f4249054f41b0dea8505cda73433b37dfa16114f27bfed3b4b3ba580aa9d53c3dcc8d48bf571a45f7c0468e6a0f2a227a7e59e17d62

    Download Submit

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\AppIconCache\100\{1AC14E77-02E7-4E5D-B744-2EB1AE5198B7}_charmap_exe
    Filesize

    36KB

    MD5

    406347732c383e23c3b1af590a47bccd

    SHA1

    fae764f62a396f2503dd81eefd3c7f06a5fb8e5f

    SHA256

    e0a9f5c75706dc79a44d0c890c841b2b0b25af4ee60d0a16a7356b067210038e

    SHA512

    18905eaad8184bb3a7b0fe21ff37ed2ee72a3bd24bb90cbfcad222cf09e2fa74e886d5c687b21d81cd3aec1e6c05891c24f67a8f82bafd2aceb0e0dcb7672ce7

    Download Submit

  • memory/660-116-0x000001E921960000-0x000001E921A60000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/660-11-0x000001E10BA00000-0x000001E10BB00000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/660-220-0x000001E10D000000-0x000001E10E930000-memory.dmp

    Filesize

    25.2MB

    Download

  • memory/660-127-0x000001E10D000000-0x000001E10E930000-memory.dmp

    Filesize

    25.2MB

    Download

  • memory/660-58-0x000001E921C90000-0x000001E921D90000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/660-43-0x000001E90F1E0000-0x000001E90F200000-memory.dmp

    Filesize

    128KB

    Download

  • memory/660-44-0x000001E90F1C0000-0x000001E90F1E0000-memory.dmp

    Filesize

    128KB

    Download

  • memory/660-33-0x000001E90F1A0000-0x000001E90F1C0000-memory.dmp

    Filesize

    128KB

    Download

  • memory/1100-0-0x00007FFE2B1C3000-0x00007FFE2B1C5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/1100-3-0x00007FFE2B1C0000-0x00007FFE2BC82000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/1100-125-0x00007FFE2B1C3000-0x00007FFE2B1C5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/1100-126-0x00007FFE2B1C0000-0x00007FFE2BC82000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/1100-1-0x00000205DCA40000-0x00000205DCA6E000-memory.dmp

    Filesize

    184KB

    Download

  • memory/1696-10-0x0000000000D90000-0x0000000000D91000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2000-8-0x00000000061B0000-0x0000000006200000-memory.dmp

    Filesize

    320KB

    Download

  • memory/2000-7-0x00000000058F0000-0x0000000005956000-memory.dmp

    Filesize

    408KB

    Download

  • memory/2000-6-0x0000000005970000-0x0000000005F16000-memory.dmp

    Filesize

    5.6MB

    Download

  • memory/2000-5-0x0000000005120000-0x00000000051BC000-memory.dmp

    Filesize

    624KB

    Download

  • memory/2000-2-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

    Download

  • memory/2000-4-0x0000000005080000-0x0000000005112000-memory.dmp

    Filesize

    584KB

    Download