Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    07/11/2026, 16:34

General

  • Target
    njCryper.exe
  • Size 15KB
  • Sample261107-t251tafd49
  • SHA256 f6196a80637663db8c0c54a54cc05f37a222e27de70148d713e9e25373741181
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Drops file in Windows directory 1 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.

  • Checks processor information in registry 2 TTPs 6 IoCs

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

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Modifies registry class 54 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\njCryper.exe
    "C:\Users\Admin\AppData\Local\Temp\njCryper.exe"
    1⤵
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2316
    • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\5u0pcfpn.cmdline"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:468
      • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
        C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES4B0A.tmp" "c:\Users\Admin\Desktop\CSC4B09.tmp"
        3⤵
          PID:3156
    • C:\Users\Admin\Desktop\222.exe
      "C:\Users\Admin\Desktop\222.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4376
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
        dw20.exe -x -s 872
        2⤵
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of AdjustPrivilegeToken
        PID:4364
    • C:\Users\Admin\Desktop\222.exe
      "C:\Users\Admin\Desktop\222.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:964
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
        dw20.exe -x -s 852
        2⤵
        • System Location Discovery: System Language Discovery
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious use of AdjustPrivilegeToken
        PID:2424

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          RES4B0A.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\RES4B0A.tmp
          • Size 1KB
          • SHA256 c6ae76651c4b570865befc764b0650313d81adab482650db8c8e5a709d834e64
          • MD5 SHA1 SHA512 TLSH

          222.exe

          • Path C:\Users\Admin\Desktop\222.exe
          • Size 3.9MB
          • SHA256 d53b5e883a87aed5f8a496fd2b235cd5fc93b7dde58cd93ee8765afdafbad096
          • MD5 SHA1 SHA512 SSDEEP TLSH

          5u0pcfpn.0.cs

          • Path \??\c:\Users\Admin\AppData\Local\Temp\5u0pcfpn.0.cs
          • Size 1KB
          • SHA256 d73ff970afb020805ce26a2f85e5526ec50955ee81b9b155a1045f9a66bf7359
          • MD5 SHA1 SHA512 TLSH

          5u0pcfpn.cmdline

          • Path \??\c:\Users\Admin\AppData\Local\Temp\5u0pcfpn.cmdline
          • Size 271B
          • SHA256 d93126e689c7495b6af74a9bcb9cb9bf695228158241b6fed610b6f0c3dbb33f
          • MD5 SHA1 SHA512 TLSH

          G8HESX1H

          • Path \??\c:\Users\Admin\AppData\Local\Temp\G8HESX1H
          • Size 3.9MB
          • SHA256 7283b68df85e6a73e74f1598702b556e11d048ecbaeb2354e7c2cc9a8ae1bd32
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CSC4B09.tmp

          • Path \??\c:\Users\Admin\Desktop\CSC4B09.tmp
          • Size 628B
          • SHA256 8809e79341d163ef39e680cdeb0cf76388cd8ac5e20250c7605cd6f43862234a
          • MD5 SHA1 SHA512 TLSH

          memory/468-33-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/468-25-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-12-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-17-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-10-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-11-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-0-0x00007FFAB1DD5000-0x00007FFAB1DD6000-memory.dmp

          memory/2316-13-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-14-0x00007FFAB1DD5000-0x00007FFAB1DD6000-memory.dmp

          memory/2316-15-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-16-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-9-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-18-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-8-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-7-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-6-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-5-0x0000000001210000-0x0000000001218000-memory.dmp

          memory/2316-4-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-3-0x000000001B470000-0x000000001B50C000-memory.dmp

          memory/2316-2-0x00007FFAB1B20000-0x00007FFAB24C1000-memory.dmp

          memory/2316-1-0x000000001BB30000-0x000000001BFFE000-memory.dmp