Overview

overview

10

Static

static

10

ClientH.exe

windows7-x64

10

ClientH.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    1800s
  • max time network
    1801s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-04-2023 12:46

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General

  • Target

    ClientH.exe

  • Size

    90KB

  • MD5

    b296864bb2a6846e9b1a59b6e613f7b3

  • SHA1

    529c91595ea7b43ca93c1ad55d7f445841e9f536

  • SHA256

    4ce0eb37a2076db86260f2dbf67dbc34c5e5c79e2fa7895458b5113ea308a2ba

  • SHA512

    77a16f9c3e5b6a983f24618cdcfd65d8dedef2995c3f9399f4c73b11b1b4b0ed8927c69aed3ceda9c4e7151a46263dc085a17fbdaf3ae6a8de691551708fcd7e

  • SSDEEP

    1536:tbRiQM/57SK3bUzZdQ1iIMvnZlbLxjV3AGq5gWlocT1wzySsd9NJ33v:tbR457SKsstcnZTJQDgWPaySsdH5/

Score
10/10
arrowratvenomhvncpersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

VenomHVNC

C2

notfishvr3333338-52100.portmap.host:52100

Mutex

qCsPvqtHt.exe

Signatures

  • ArrowRat

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

    ratarrowrat
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 22 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies registry class 35 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of FindShellTrayWindow 51 IoCs
  • Suspicious use of SendNotifyMessage 23 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ClientH.exe
    "C:\Users\Admin\AppData\Local\Temp\ClientH.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3304
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Modifies Installed Components in the registry
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4572
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" VenomHVNC notfishvr3333338-52100.portmap.host 52100 qCsPvqtHt.exe
      2⤵
        PID:4648
    • 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:3052
    • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
      "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:2924

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133263892173162921.txt
      Filesize

      75KB

      MD5

      65019a5db517d9fb830d8a57406a03ea

      SHA1

      817faf2ffe8461f653519e7bd96e7ee75021c891

      SHA256

      3ae88b3a99e6b785bdb44760790bc03ac722ef5b673ad5b3ca49b5cc5eecf84f

      SHA512

      bcc985d3fa48efcbb4a334b1a341a6686ef6c69f237d6d9bdcd9885696d148519ab824b9150194d783cb03189c1cc00a483f1b73ebce323f1f6a303a05b8ea62

      Download Submit

    • memory/2924-148-0x00000217E4B20000-0x00000217E4B40000-memory.dmp

      Filesize

      128KB

      Download

    • memory/2924-151-0x00000217E47E0000-0x00000217E4800000-memory.dmp

      Filesize

      128KB

      Download

    • memory/2924-154-0x00000217E4EF0000-0x00000217E4F10000-memory.dmp

      Filesize

      128KB

      Download

    • memory/3304-133-0x0000000000BF0000-0x0000000000C0C000-memory.dmp

      Filesize

      112KB

      Download

    • memory/3304-134-0x0000000005AC0000-0x0000000006064000-memory.dmp

      Filesize

      5.6MB

      Download

    • memory/3304-135-0x00000000056C0000-0x000000000575C000-memory.dmp

      Filesize

      624KB

      Download

    • memory/4572-142-0x00000000033A0000-0x00000000033A1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/4648-136-0x0000000000400000-0x0000000000410000-memory.dmp

      Filesize

      64KB

      Download

    • memory/4648-139-0x0000000005410000-0x00000000054A2000-memory.dmp

      Filesize

      584KB

      Download

    • memory/4648-140-0x00000000053D0000-0x00000000053E0000-memory.dmp

      Filesize

      64KB

      Download

    • memory/4648-269-0x00000000053D0000-0x00000000053E0000-memory.dmp

      Filesize

      64KB

      Download