Analysis

  • max time kernel
    131s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250410-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/04/2025, 06:21

General

  • Target

    Bootstrapper.exe

  • Size

    2.0MB

  • MD5

    b9459d549b1b8457c7c1d5b9bce02af8

  • SHA1

    4cf9d5a422d3947186ea816d759738a2385847fd

  • SHA256

    9ec072826b39d6a5bc2b0d30f4b5130719006318114af5c374b3ef01f2d845e8

  • SHA512

    a74a98846f054c710b1e371bb0287f8887eda4a9cb568e30af89a5f6ed6e6014734452f4429ca1896d68a59b1973f6804db119279c4c8523056d232a93a5b42a

  • SSDEEP

    3072:IaJfX7TOQucdr/rdwepzCxeUdo9clZpZ7Tk0YN3r1tM4NpVq8BxFRzaqF+o2GQJ2:D7C4r/TFCxeUdo9cJxk04rsgVqwlL

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

  • pastebin_url

    https://pastebin.com/raw/qS2AxbFH

Signatures

  • Detect Xworm Payload 2 IoCs
  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 1 IoCs
  • Stormkitty family
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 5 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 11 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 48 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe
    "C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2252
    • C:\Users\Admin\AppData\Roaming\Bootstrapper.exe
      "C:\Users\Admin\AppData\Roaming\Bootstrapper.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4252
      • C:\Users\Admin\AppData\Roaming\XClient.exe
        "C:\Users\Admin\AppData\Roaming\XClient.exe"
        3⤵
        • Checks computer location settings
        • Drops startup file
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:5172
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:5184
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:5732
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2656
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3160
        • C:\Windows\System32\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:5664
        • C:\Windows\System32\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /delete /f /tn "XClient"
          4⤵
            PID:564
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3D49.tmp.bat""
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:4896
            • C:\Windows\system32\timeout.exe
              timeout 3
              5⤵
              • Delays execution with timeout.exe
              PID:5384
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\HorizonLoader.bat" "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2312
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:4872
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:4912
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:3556
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:3012
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:5056
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:5068
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:5100
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:3608
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:3880
        • C:\Windows\system32\timeout.exe
          timeout /t 0 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:4116
        • C:\Windows\system32\tasklist.exe
          tasklist
          3⤵
          • Enumerates processes with tasklist
          • Suspicious use of AdjustPrivilegeToken
          PID:4240
        • C:\Windows\system32\find.exe
          find /i "RobloxPlayerBeta.exe"
          3⤵
            PID:2912
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\XClient.exe
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:6112
        • C:\Users\Admin\AppData\Roaming\XClient.exe
          C:\Users\Admin\AppData\Roaming\XClient.exe
          2⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:4632
      • C:\Windows\system32\DllHost.exe
        C:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}
        1⤵
          PID:4872
        • C:\Users\Admin\AppData\Roaming\XClient.exe
          C:\Users\Admin\AppData\Roaming\XClient.exe
          1⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:3880
        • C:\Users\Admin\AppData\Roaming\XClient.exe
          C:\Users\Admin\AppData\Roaming\XClient.exe
          1⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:3340

        Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

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

          Filesize

          654B

          MD5

          2ff39f6c7249774be85fd60a8f9a245e

          SHA1

          684ff36b31aedc1e587c8496c02722c6698c1c4e

          SHA256

          e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

          SHA512

          1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

          Filesize

          2KB

          MD5

          d85ba6ff808d9e5444a4b369f5bc2730

          SHA1

          31aa9d96590fff6981b315e0b391b575e4c0804a

          SHA256

          84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

          SHA512

          8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

          Filesize

          944B

          MD5

          a1a5cd54a073fcc6f996c5bf8eae9ab4

          SHA1

          f51b3b1fe5ec1ace8641c99d2769a0f9f93f640f

          SHA256

          d0cc04ed0b546b1d7f405da38b5c1addd1fbc26591027e76b9745a9c1daf584e

          SHA512

          6804bc8a338f7727396b107ee58e418dae2c086aa85c8edb4d4a90f7398963dc63bab06574ed8b3c593e76d7740ecacec63d1643c6f26058a5d947caafb7673c

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

          Filesize

          944B

          MD5

          a7cc007980e419d553568a106210549a

          SHA1

          c03099706b75071f36c3962fcc60a22f197711e0

          SHA256

          a5735921fc72189c8bf577f3911486cf031708dc8d6bc764fe3e593c0a053165

          SHA512

          b9aaf29403c467daef80a1ae87478afc33b78f4e1ca16189557011bb83cf9b3e29a0f85c69fa209c45201fb28baca47d31756eee07b79c6312c506e8370f7666

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

          Filesize

          944B

          MD5

          ba169f4dcbbf147fe78ef0061a95e83b

          SHA1

          92a571a6eef49fff666e0f62a3545bcd1cdcda67

          SHA256

          5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

          SHA512

          8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gnm0oqry.x5z.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\tmp3D49.tmp.bat

          Filesize

          156B

          MD5

          b1868b2a94f83a19356920390ca5e4d7

          SHA1

          82cd5a6e2c20f8b532727b4b7b850af1fca572f9

          SHA256

          cf776be59570039b625528e243a977d5a231a0bf56462d39cfbb58eeba76b9fe

          SHA512

          20abc1daf68c64f5863e5c51b5ec5ba4b2675630510844fba809c6263d7309acffbbaffa1d66aac7b3f4912dc1428cbb0a771ebd164c77d1d2c09f46f5b02366

        • C:\Users\Admin\AppData\Roaming\Bootstrapper.exe

          Filesize

          193KB

          MD5

          e9b9f5423efacb26fbc0c90de018ce13

          SHA1

          cdab884e2706aa3d9e91a69000b365b4f9bbb192

          SHA256

          34493aad4caa6dcf50b917914bbf5c14c4dbc9b59feab80dc193701c1277c18c

          SHA512

          52bec52aed0d43c35fcf33c5072b0bd87727c00346f284e152e6cedb1a35e35dc63986cb84cc810f756349f94e741bce753ba069f1f01cc3a352cac624c44181

        • C:\Users\Admin\AppData\Roaming\HorizonLoader.bat

          Filesize

          3KB

          MD5

          ee7d95d8b7bc4c2b2762e74b0415fdc6

          SHA1

          b5844b77a79130cc33d17d98cc3227a95c7d6c4e

          SHA256

          c3bda6453630e619a898918a7d8e4288749f445208c92c1aff947d884f4bdcdc

          SHA512

          51cb11646f0dceab48836762034dda0928f5362abee8f6d3caded6fa7706c0bef45c023a5fc7a98605dd1a47ab3172cd4c3f2e2d7fdb4fa7b92923bb996332f9

        • C:\Users\Admin\AppData\Roaming\XClient.exe

          Filesize

          67KB

          MD5

          adbdd2cfde1cf6f35f70bc18b4516094

          SHA1

          dd8495606d9abd033373141f2f176efdc61e9622

          SHA256

          bf825b23f35c5246335fe9d277d338cf46d303a6788b64410740159d731dbd5f

          SHA512

          26a40a4d7099313ac1d55561c9b32a47a82c40f972c6596df14dc9fc95324177359963d2bd02bea80d9faa79a8c7dc0a67f2ed51fe3b7aeabc2072627f24258e

        • memory/2252-0-0x00007FFE7A3D3000-0x00007FFE7A3D5000-memory.dmp

          Filesize

          8KB

        • memory/2252-1-0x0000000000E40000-0x0000000000E98000-memory.dmp

          Filesize

          352KB

        • memory/4252-20-0x00007FFE7A3D0000-0x00007FFE7AE91000-memory.dmp

          Filesize

          10.8MB

        • memory/4252-33-0x00007FFE7A3D0000-0x00007FFE7AE91000-memory.dmp

          Filesize

          10.8MB

        • memory/4252-18-0x0000000000180000-0x00000000001B6000-memory.dmp

          Filesize

          216KB

        • memory/5172-32-0x00000000001F0000-0x0000000000208000-memory.dmp

          Filesize

          96KB

        • memory/5172-83-0x000000001AFE0000-0x000000001AFEC000-memory.dmp

          Filesize

          48KB

        • memory/5172-87-0x000000001D2D0000-0x000000001D3F0000-memory.dmp

          Filesize

          1.1MB

        • memory/5184-43-0x0000027B24560000-0x0000027B24582000-memory.dmp

          Filesize

          136KB