Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260630-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260630-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    02/07/2026, 11:21

General

  • Target
    libtcmalloc_minimal.dll
  • Size 32.0MB
  • Sample260702-nf3exae18n
  • SHA256 5bf43d8043349d06589a1a2e03842428429e0c3c173c883a7047c3e99d6b0fbe
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • UAC bypass 3 TTPs 6 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 4 IoCs
  • VMProtect packed file 25 IoCs

    Detects executables packed with VMProtect commercial packer.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 52 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • System policy modification 1 TTPs 8 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\libtcmalloc_minimal.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3464
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\libtcmalloc_minimal.dll,#1
      2⤵
      • UAC bypass
      • Checks whether UAC is enabled
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:672
      • C:\ProgramData\TPNK\tasnkd.exe
        C:\ProgramData\TPNK\tasnkd.exe
        3⤵
        • UAC bypass
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:1844
        • \??\c:\lsasa.exe
          c:/lsasa.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          PID:5952
      • C:\ProgramData\TPNK\tasnkd.exe
        C:\ProgramData\TPNK\tasnkd.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4884
  • C:\ProgramData\KJQD\aappec\aappec.exe
    "C:\ProgramData\KJQD\aappec\aappec.exe"
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:6000
    • \??\c:\lsasa.exe
      c:/lsasa.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:3060
    • \??\c:\ProgramData\TPNK\tasnkd.exe
      c:/ProgramData/TPNK\tasnkd.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:1248

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        aappec.exe

        • Path C:\ProgramData\KJQD\aappec\aappec.exe
        • Size 193KB
        • SHA256 d23373a73e086f2575cd5f994dc37d9af39757b48ea04d34b9ffe0b0b8dd4d5a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        VideoSdk.dll

        • Path C:\ProgramData\TPNK\VideoSdk.dll
        • Size 7.4MB
        • SHA256 0aa66c62d8af0501b615368e37bb09f3e1a7804a5a14e6c5e08379b52beec618
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tasnkd.exe

        • Path C:\ProgramData\TPNK\tasnkd.exe
        • Size 113KB
        • SHA256 3258965d7f60f55493f783dd5b5bdd7575681ce8a76894ec72a09c94bdba135d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        jilu.inf

        • Path \??\c:\ProgramData\KZZ\jilu.inf
        • Size 1.1MB
        • SHA256 7d0b4d3889a821a561d7ab2b69f0d776f64e635475a4273de65f02fdbf99e19d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        yy.inf

        • Path \??\c:\ProgramData\KZZ\yy.inf
        • Size 9.1MB
        • SHA256 7e7b30266a3605e4deb5041162b8ef235f6c8cf24c688f23f2706cad9ef4fe24
        • MD5 SHA1 SHA512 SSDEEP TLSH

        banben.ars

        • Path \??\c:\ProgramData\intsla\banben.ars
        • Size 6B
        • SHA256 f9be931ff46389a88a7b86259144a6811fa761967156c4e2b1f17c262d86521f
        • MD5 SHA1 SHA512

        bzwb.ars

        • Path \??\c:\ProgramData\intsla\bzwb.ars
        • Size 6B
        • SHA256 ad15e303804ccf22a08accabb8ce218b748a089ec88c955056813bcf0c013673
        • MD5 SHA1 SHA512

        ID.ars

        • Path \??\c:\ProgramData\intsla\dll\ID.ars
        • Size 6B
        • SHA256 613732a999651c433b079e01176d20de1f63ae22addac4a1a2b6f67006829763
        • MD5 SHA1 SHA512

        ncrl.ars

        • Path \??\c:\ProgramData\intsla\ncrl.ars
        • Size 5B
        • SHA256 0ab6a8f8fec07fefbe2773b481361e50d913e0ab1493bd228c98fb9951871094
        • MD5 SHA1 SHA512

        opkaiguan.txt

        • Path \??\c:\ProgramData\intsla\opkaiguan.txt
        • Size 1KB
        • SHA256 4c13d452dd5d49671bd93ca32f2b4f85c78e39b6ab0ad1f38d98ed267f8fd896
        • MD5 SHA1 SHA512 TLSH

        yingzi.ars

        • Path \??\c:\ProgramData\intsla\yingzi.ars
        • Size 8B
        • SHA256 4f5c6b6cd333e1ef3e832b8792959f61c63dfb87e3b94e3eda6400b00121e460
        • MD5 SHA1 SHA512

        yprl.ars

        • Path \??\c:\ProgramData\intsla\yprl.ars
        • Size 3B
        • SHA256 a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3
        • MD5 SHA1 SHA512

        memory/672-0-0x00000000706D0000-0x0000000074751000-memory.dmp

        memory/672-46-0x00000000706D0000-0x0000000074751000-memory.dmp

        memory/672-1-0x00000000706D0000-0x0000000074751000-memory.dmp

        memory/1248-73-0x0000000010000000-0x0000000010F55000-memory.dmp

        memory/1844-54-0x0000000010000000-0x0000000010F55000-memory.dmp

        memory/1844-31-0x0000000010000000-0x0000000010F55000-memory.dmp

        memory/1844-27-0x0000000010000000-0x0000000010F55000-memory.dmp

        memory/3060-67-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/3060-69-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/4884-47-0x0000000010000000-0x0000000010F55000-memory.dmp

        memory/4884-42-0x0000000010000000-0x0000000010F55000-memory.dmp

        memory/4884-30-0x0000000010000000-0x0000000010F55000-memory.dmp

        memory/5952-65-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-59-0x0000000010000000-0x0000000010386000-memory.dmp

        memory/5952-79-0x0000000010000000-0x0000000010386000-memory.dmp

        memory/5952-80-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-55-0x0000000010000000-0x0000000010386000-memory.dmp

        memory/5952-52-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-86-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-87-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-88-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-89-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-90-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-91-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-92-0x0000000000400000-0x0000000001A31000-memory.dmp

        memory/5952-93-0x0000000000400000-0x0000000001A31000-memory.dmp