Overview

overview

10

Static

static

7

Emiditor.exe

windows7-x64

9

Emiditor.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    207s
  • max time network
    211s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/11/2022, 18:24

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General

  • Target
    Emiditor.exe
  • Size 8.1MB
  • Sample221127-w12ccahc87
  • SHA256 b559413c43d76b67e8b068c842a0a615b04d6d687be860e18da1adc43dfe5b5e
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
arrowratclientevasionpersistenceratthemidatrojan

Malware Config

Extracted

Family

  • arrowrat

Botnet

  • Client

C2

  • 65.108.204.97:1337

Mutex

  • PreIzXewwN

Signatures

  • ArrowRat

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

    ratarrowrat
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
    evasion
  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
    persistence
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

    themida
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    evasiontrojan
  • 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 NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of SetThreadContext 2 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 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 IoCs
  • Suspicious use of FindShellTrayWindow 49 IoCs
  • Suspicious use of SendNotifyMessage 21 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Emiditor.exe
    "C:\Users\Admin\AppData\Local\Temp\Emiditor.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1088
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2324
      • C:\Windows\explorer.exe
        "C:\Windows\explorer.exe"
        3⤵
        • 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:4456
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 65.108.204.97 1337 PreIzXewwN
        3⤵
          PID:4732
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 65.108.204.97 1337 PreIzXewwN
          3⤵
            PID:4220
      • 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:1212
      • 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:396

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            memory/396-165-0x0000023EEC730000-0x0000023EEC750000-memory.dmp
            Download

            memory/396-168-0x0000023EE9AF0000-0x0000023EE9B10000-memory.dmp
            Download

            memory/396-167-0x0000023EE88D0000-0x0000023EE88D8000-memory.dmp
            Download

            memory/396-166-0x0000023EEC730000-0x0000023EEC750000-memory.dmp
            Download

            memory/1088-144-0x00007FFD6FFC0000-0x00007FFD70A81000-memory.dmp
            Download

            memory/1088-137-0x0000000000100000-0x0000000000920000-memory.dmp
            Download

            memory/1088-138-0x00007FFD8F1B0000-0x00007FFD8F3A5000-memory.dmp
            Download

            memory/1088-139-0x00007FFD6FFC0000-0x00007FFD70A81000-memory.dmp
            Download

            memory/1088-133-0x00007FFD8F1B0000-0x00007FFD8F3A5000-memory.dmp
            Download

            memory/1088-134-0x0000000000100000-0x0000000000920000-memory.dmp
            Download

            memory/1088-142-0x0000000000100000-0x0000000000920000-memory.dmp
            Download

            memory/1088-143-0x00007FFD8F1B0000-0x00007FFD8F3A5000-memory.dmp
            Download

            memory/1088-132-0x0000000000100000-0x0000000000920000-memory.dmp
            Download

            memory/1088-135-0x0000000000100000-0x0000000000920000-memory.dmp
            Download

            memory/1088-136-0x00007FFD6FFC0000-0x00007FFD70A81000-memory.dmp
            Download

            memory/2324-152-0x0000000005690000-0x000000000569A000-memory.dmp
            Download

            memory/2324-151-0x00000000056B0000-0x0000000005742000-memory.dmp
            Download

            memory/2324-146-0x0000000005460000-0x00000000054FC000-memory.dmp
            Download

            memory/2324-145-0x0000000005900000-0x0000000005EA4000-memory.dmp
            Download

            memory/2324-140-0x0000000000400000-0x000000000042C000-memory.dmp
            Download

            memory/4220-150-0x0000000000400000-0x0000000000418000-memory.dmp
            Download

            memory/4220-153-0x00000000059F0000-0x0000000005A56000-memory.dmp
            Download

            memory/4220-154-0x00000000061A0000-0x00000000061F0000-memory.dmp
            Download