Overview

overview

10

Static

static

10

Arhvn.exe

windows7-x64

10

Arhvn.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    30s
  • max time network
    32s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-11-2022 08:42

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General

  • Target

    Arhvn.exe

  • Size

    90KB

  • MD5

    65bac4256dde1c7d987afa8ef8e9a1c4

  • SHA1

    222922b2ba2f43cfc2049ca578b256d486fcf956

  • SHA256

    f51fe3720ba2e618cc10e6045a948880f6ca2c802466684332bf744e526059e7

  • SHA512

    7d08d19af3eff1a3899a4d039ba273ead5267e075af32b9755cd61ad5349bf6e6c87cbf9cca92893da7c4acecb42d9867f447f2139384e5de86b235c77125d27

  • SSDEEP

    1536:ubRiQMn57SK3bUzZdQ1iIMvnZlbLxjV3AGq5gWlocT1wzySsd9NJ33L:ubRA57SKsstcnZTJQDgWPaySsdH57

Score
10/10
arrowratarrowratpersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

ArrowRAT

C2

arhvn.duckdns.org:5555

Mutex

fKHUsQQAb.exe

Signatures

  • ArrowRat

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

    ratarrowrat
  • 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.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies registry class 54 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 33 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\Arhvn.exe
    "C:\Users\Admin\AppData\Local\Temp\Arhvn.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3184
    • 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:2380
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" ArrowRAT arhvn.duckdns.org 5555 fKHUsQQAb.exe
      2⤵
        PID:2116
    • 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:3704
    • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
      "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
      1⤵
      • Enumerates system info in registry
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:5036

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2116-137-0x0000000000400000-0x0000000000410000-memory.dmp

      Filesize

      64KB

      Download

    • memory/2116-138-0x00000000051E0000-0x0000000005272000-memory.dmp

      Filesize

      584KB

      Download

    • memory/3184-132-0x0000000000360000-0x000000000037C000-memory.dmp

      Filesize

      112KB

      Download

    • memory/3184-133-0x00000000051F0000-0x0000000005794000-memory.dmp

      Filesize

      5.6MB

      Download

    • memory/3184-134-0x0000000004E20000-0x0000000004EBC000-memory.dmp

      Filesize

      624KB

      Download

    • memory/5036-149-0x0000024B02940000-0x0000024B02960000-memory.dmp

      Filesize

      128KB

      Download

    • memory/5036-147-0x0000024B020C0000-0x0000024B020E0000-memory.dmp

      Filesize

      128KB

      Download

    • memory/5036-155-0x0000024B0406C000-0x0000024B04070000-memory.dmp

      Filesize

      16KB

      Download

    • memory/5036-156-0x0000024B0406C000-0x0000024B04070000-memory.dmp

      Filesize

      16KB

      Download

    • memory/5036-154-0x0000024B0406C000-0x0000024B04070000-memory.dmp

      Filesize

      16KB

      Download

    • memory/5036-157-0x0000024B0406C000-0x0000024B04070000-memory.dmp

      Filesize

      16KB

      Download

    • memory/5036-158-0x0000024B0406C000-0x0000024B04070000-memory.dmp

      Filesize

      16KB

      Download

    • memory/5036-160-0x0000024B01120000-0x0000024B01220000-memory.dmp

      Filesize

      1024KB

      Download

    • memory/5036-162-0x0000024B02160000-0x0000024B02180000-memory.dmp

      Filesize

      128KB

      Download

    • memory/5036-163-0x0000024B028A0000-0x0000024B028C0000-memory.dmp

      Filesize

      128KB

      Download