Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows11-21h2_x64
  • resource
    win11-20251015-en
  • resource tags

    arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    07/12/2025, 04:05

General

  • Target
    xtswpssxti2.65.msi
  • Size 66.3MB
  • Sample251207-entcjady7f
  • SHA256 7637a316f0b40eedb840ad41a3e56db7b9432b54c03508774d99747ec44a85f1
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • fatalrat

C2
  • a23.nbdsnb2.top

Signatures

  • Fatal Rat payload 1 IoCs
  • FatalRat

    FatalRat is a modular infostealer family written in C++ first appearing in June 2021.

  • Fatalrat family
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Executes dropped EXE 12 IoCs
  • Loads dropped DLL 7 IoCs
  • VMProtect packed file 2 IoCs

    Detects executables packed with VMProtect commercial packer.

  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in System32 directory 2 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Windows directory 34 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\xtswpssxti2.65.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:1552
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5612
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4876
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 15A4483B0CC7980BD5E0BF9A7CCE3351
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:5088
      • C:\Windows\Installer\MSIA3E9.tmp
        "C:\Windows\Installer\MSIA3E9.tmp"
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:3580
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:1164
    • C:\Windows\Pack\TjNKNK.exe
      "C:\Windows\Pack\TjNKNK.exe" install
      1⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:4652
    • C:\Windows\Pack\TjNKNK.exe
      "C:\Windows\Pack\TjNKNK.exe"
      1⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:420
    • C:\Windows\Pack\TjNKNK.exe
      "C:\Windows\Pack\TjNKNK.exe" start
      1⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:6032
    • C:\Windows\Pack\TjNKNK.exe
      "C:\Windows\Pack\TjNKNK.exe"
      1⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1756
      • C:\Windows\System32\netsh.exe
        "C:\Windows\System32\netsh.exe" advfirewall set allprofiles state off
        2⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:2060
    • C:\Windows\Pack\TjNKNP.exe
      "C:\Windows\Pack\TjNKNP.exe" install
      1⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      PID:5420
    • C:\Windows\Pack\TjNKNP.exe
      "C:\Windows\Pack\TjNKNP.exe"
      1⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      PID:240
    • C:\Windows\Pack\TjNKNP.exe
      "C:\Windows\Pack\TjNKNP.exe" start
      1⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      PID:5560
    • C:\Windows\Pack\TjNKNP.exe
      "C:\Windows\Pack\TjNKNP.exe"
      1⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3740
      • C:\Windows\Pack\setup.exe
        "C:\Windows\Pack\setup.exe"
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:5968
        • C:\ProgramData\NVIDIARV\svchost.exe
          "C:\ProgramData\NVIDIARV\svchost.exe"
          3⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Checks processor information in registry
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:5908
    • C:\ProgramData\backup\setup.exe
      "C:\ProgramData\backup\setup.exe"
      1⤵
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      • System Location Discovery: System Language Discovery
      PID:1184

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          e579eb4.rbs

          • Path C:\Config.Msi\e579eb4.rbs
          • Size 2KB
          • SHA256 ec9e2e66a7640f491e96aa3744d5fb145e3f47579390c69dc6c02fd22ad53a16
          • MD5 SHA1 SHA512

          svchost.exe

          • Path C:\ProgramData\NVIDIARV\svchost.exe
          • Size 3.4MB
          • SHA256 a7bcaf31d891b60a53ca6286d5939cbd041758c760502fb73618edd382cd34ed
          • MD5 SHA1 SHA512 SSDEEP

          setup.exe

          • Path C:\ProgramData\backup\setup.exe
          • Size 2.9MB
          • SHA256 c6ac7d9add40b913112b265d4f366d9ef80bbd711049db085fc750fcad4e14d8
          • MD5 SHA1 SHA512 SSDEEP

          TjNKNK.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\TjNKNK.exe.log
          • Size 1KB
          • SHA256 c7fe4d0b82bec7d44e817c76123b381269d494e2ff4a7f539ad53eb3ef5c4371
          • MD5 SHA1 SHA512

          MSI9F3D.tmp

          • Path C:\Windows\Installer\MSI9F3D.tmp
          • Size 587KB
          • SHA256 e140990b509dd6884a5742bde64f2cdaa10012d472b0b32de43ebecbc83242b6
          • MD5 SHA1 SHA512 SSDEEP

          MSIA135.tmp

          • Path C:\Windows\Installer\MSIA135.tmp
          • Size 1.1MB
          • SHA256 83fbfcaff3da3eb89f9aec29e6574cf15502fd670cbb2ab0c8a84451b2598b22
          • MD5 SHA1 SHA512 SSDEEP

          MSIA3E9.tmp

          • Path C:\Windows\Installer\MSIA3E9.tmp
          • Size 2.2MB
          • SHA256 89b993b2dc17e2ea54c4214862b5fc479af0d2b61aed38aeac7209ce950d5d4d
          • MD5 SHA1 SHA512 SSDEEP

          TjNKNK.exe

          • Path C:\Windows\Pack\TjNKNK.exe
          • Size 832KB
          • SHA256 923111c7142b3dc783a3c722b19b8a21bcb78222d7a136ac33f0ca8a29f4cb66
          • MD5 SHA1 SHA512 SSDEEP

          TjNKNK.wrapper.log

          • Path C:\Windows\Pack\TjNKNK.wrapper.log
          • Size 272B
          • SHA256 a1802878649a54be56627b5c722ce1f4e0252447628ce6d8e8ca156414b38b31
          • MD5 SHA1 SHA512

          TjNKNK.wrapper.log

          • Path C:\Windows\Pack\TjNKNK.wrapper.log
          • Size 336B
          • SHA256 c507271ff828282c09702deee47129c2e4e20da0739b9c604a02ad6f44297e3e
          • MD5 SHA1 SHA512

          TjNKNK.wrapper.log

          • Path C:\Windows\Pack\TjNKNK.wrapper.log
          • Size 495B
          • SHA256 a38b3a5a704cf8f5e0dfdfa61f612933c32de51fd224f0bf5fb872392ae9e88e
          • MD5 SHA1 SHA512

          TjNKNK.wrapper.log

          • Path C:\Windows\Pack\TjNKNK.wrapper.log
          • Size 664B
          • SHA256 5c6dd4bee32f806f83b644520477ac5a5bb890b010ffe7fee292018ac77e8785
          • MD5 SHA1 SHA512

          TjNKNK.wrapper.log

          • Path C:\Windows\Pack\TjNKNK.wrapper.log
          • Size 774B
          • SHA256 7a1149b154e99ad22f276ae5b67787c18a9c21745fe79f0cc45b56a00c5325d7
          • MD5 SHA1 SHA512

          TjNKNK.wrapper.log

          • Path C:\Windows\Pack\TjNKNK.wrapper.log
          • Size 958B
          • SHA256 f2bd250efd6b656e123c222d5796c253857d01034757ba45fe1a4c83808d0106
          • MD5 SHA1 SHA512

          TjNKNK.xml

          • Path C:\Windows\Pack\TjNKNK.xml
          • Size 365B
          • SHA256 7de208a620d57d3e417fd504fce1d4a4e44e9af54f4fd96f3dd7a58a84ac9ca4
          • MD5 SHA1 SHA512

          TjNKNP.wrapper.log

          • Path C:\Windows\Pack\TjNKNP.wrapper.log
          • Size 268B
          • SHA256 5e9901e5da5f1ed06a241eb8e6ada2358c9ee28029c147ca9094bf38303803d8
          • MD5 SHA1 SHA512

          TjNKNP.wrapper.log

          • Path C:\Windows\Pack\TjNKNP.wrapper.log
          • Size 332B
          • SHA256 1046089028d055ec4950c4d64754d8c0b7a29cc91eed98440c1ede42128af4df
          • MD5 SHA1 SHA512

          TjNKNP.wrapper.log

          • Path C:\Windows\Pack\TjNKNP.wrapper.log
          • Size 489B
          • SHA256 f226f81724e311c3d82e337fdb3bb223a45ea6227f8f5a0831a2abfe6b3ccf81
          • MD5 SHA1 SHA512

          TjNKNP.wrapper.log

          • Path C:\Windows\Pack\TjNKNP.wrapper.log
          • Size 725B
          • SHA256 cb8d758cc55693bdf0f2807f5ea602ed4a44b0f539353dc697cec21fa4dc6ed4
          • MD5 SHA1 SHA512

          TjNKNP.xml

          • Path C:\Windows\Pack\TjNKNP.xml
          • Size 294B
          • SHA256 b09256eb486cb5272f1b83dcbddb7880d02f200908b8ae808fa30e05bf8fe6c3
          • MD5 SHA1 SHA512

          setup.exe

          • Path C:\Windows\Pack\setup.exe
          • Size 1.9MB
          • SHA256 210584e0c67e4fa3655175b50175ef4748cea35c8313cc125a184d5fc90ac0b3
          • MD5 SHA1 SHA512 SSDEEP

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 6784375187e1410a65a92953ffd1be415e55a0beaae71b1ccfae1d71eda04289
          • MD5 SHA1 SHA512 SSDEEP

          {cf8ac2a1-e099-43d1-8c2c-8cfe1344ad2d}_OnDiskSnapshotProp

          • Path \??\Volume{2a1b5cfa-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{cf8ac2a1-e099-43d1-8c2c-8cfe1344ad2d}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 9245a151b62d048d346dcdb7ca8adbb4e42f1e935eaa2e77009242a3069e9c62
          • MD5 SHA1 SHA512 SSDEEP

          memory/1184-147-0x0000000000250000-0x00000000007F3000-memory.dmp

          memory/1184-159-0x0000000000250000-0x00000000007F3000-memory.dmp

          memory/1184-153-0x0000000000250000-0x00000000007F3000-memory.dmp

          memory/1184-152-0x0000000000250000-0x00000000007F3000-memory.dmp

          memory/3580-57-0x00000000034C0000-0x00000000034C1000-memory.dmp

          memory/3580-59-0x0000000000E60000-0x0000000001275000-memory.dmp

          memory/4652-63-0x0000000000470000-0x0000000000546000-memory.dmp

          memory/5612-75-0x00000164002B0000-0x0000016400D72000-memory.dmp

          memory/5908-135-0x0000000000400000-0x0000000000910000-memory.dmp

          memory/5908-137-0x0000000010000000-0x000000001002D000-memory.dmp

          memory/5968-131-0x0000000000400000-0x00000000007B9000-memory.dmp

          memory/5968-129-0x00000000008D0000-0x00000000008D1000-memory.dmp