Overview

overview

10

Static

static

10

Client.exe

windows11-21h2-x64

10

Client.exe

windows7-x64

10

Client.exe

windows10-1703-x64

10

Client.exe

windows10-2004-x64

10

Client.exe

windows11-21h2-x64

10

Client.exe

android-11-x64

Analysis

  • max time kernel
    134s
  • max time network
    144s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    07-05-2024 10:59

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General

  • Target

    Client.exe

  • Size

    158KB

  • MD5

    d0a55dda2e691dbb7eedcd02cc7eaffa

  • SHA1

    37433d28c8f89e0f3b63e145d592e86e9da9b22f

  • SHA256

    0a53456ad2ce6a20c459e38a8fb0be2751c7543a0d8a47f52bb48a8b6d24d335

  • SHA512

    de5975c1c76799649b917b5e43c681ea2aff06813f43d363d4dc2ec8c99d33ba17026cb07a26931e6f637e26add9090be0eccc95f753f625461c75fe2b07327a

  • SSDEEP

    3072:wbzmH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfPzdO8Y:wbzme0ODhTEPgnjuIJzo+PPcfPzQ8

Score
10/10
arrowratclientpersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

26.137.109.175:1337

Mutex

pqjvqGUKv

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 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 35 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 33 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 21 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4404
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Modifies Installed Components in the registry
      • Enumerates connected drives
      • Drops file in Windows directory
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:4768
      • C:\Windows\system32\ctfmon.exe
        ctfmon.exe
        3⤵
          PID:1164
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
        2⤵
          PID:4720
        • C:\Windows\System32\ComputerDefaults.exe
          "C:\Windows\System32\ComputerDefaults.exe"
          2⤵
            PID:2972
        • C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe
          "C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca
          1⤵
          • Drops file in Windows directory
          • Enumerates system info in registry
          • Modifies Internet Explorer settings
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:4988

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • memory/4404-0-0x0000020884D50000-0x0000020884D7E000-memory.dmp

          Filesize

          184KB

          Download

        • memory/4404-1-0x00007FFC1AAA3000-0x00007FFC1AAA4000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4404-87-0x00007FFC1AAA0000-0x00007FFC1B48C000-memory.dmp

          Filesize

          9.9MB

          Download

        • memory/4404-15-0x00007FFC1AAA0000-0x00007FFC1B48C000-memory.dmp

          Filesize

          9.9MB

          Download

        • memory/4720-9-0x0000000009B90000-0x0000000009BF6000-memory.dmp

          Filesize

          408KB

          Download

        • memory/4720-8-0x0000000009620000-0x0000000009B1E000-memory.dmp

          Filesize

          5.0MB

          Download

        • memory/4720-7-0x0000000008F00000-0x0000000008F9C000-memory.dmp

          Filesize

          624KB

          Download

        • memory/4720-12-0x0000000009D00000-0x0000000009D50000-memory.dmp

          Filesize

          320KB

          Download

        • memory/4720-6-0x0000000008E60000-0x0000000008EF2000-memory.dmp

          Filesize

          584KB

          Download

        • memory/4720-2-0x0000000000400000-0x0000000000418000-memory.dmp

          Filesize

          96KB

          Download

        • memory/4768-16-0x0000000002C20000-0x0000000002C21000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4988-18-0x0000023A17E00000-0x0000023A17F00000-memory.dmp

          Filesize

          1024KB

          Download

        • memory/4988-19-0x0000023A17E00000-0x0000023A17F00000-memory.dmp

          Filesize

          1024KB

          Download

        • memory/4988-23-0x0000023A18520000-0x0000023A18540000-memory.dmp

          Filesize

          128KB

          Download

        • memory/4988-47-0x0000023A186A0000-0x0000023A186C0000-memory.dmp

          Filesize

          128KB

          Download