Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    02/06/2026, 03:07

General

  • Target
    tmpvyjrvx5i.exe
  • Size 676KB
  • Sample260602-dmembady5q
  • SHA256 5f2b9ed2f71d70da18b6f8f25e34b942985a7c18ebd8e830c4e6723169baa8af
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • UAC bypass 3 TTPs 12 IoCs
  • Adds policy Run key to start application 2 TTPs 29 IoCs
  • Disables RegEdit via registry modification 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 64 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Hijack Execution Flow: Executable Installer File Permissions Weakness 1 TTPs 3 IoCs

    Possible Turn off User Account Control's privilege elevation for standard users.

  • Looks up external IP address via web service 4 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows 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 2 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • System policy modification 1 TTPs 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpvyjrvx5i.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpvyjrvx5i.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Adds policy Run key to start application
    • Disables RegEdit via registry modification
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Hijack Execution Flow: Executable Installer File Permissions Weakness
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1500
    • C:\Users\Admin\AppData\Local\Temp\yhnxdkk.exe
      "C:\Users\Admin\AppData\Local\Temp\yhnxdkk.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Impair Defenses: Safe Mode Boot
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Hijack Execution Flow: Executable Installer File Permissions Weakness
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:3004
    • C:\Users\Admin\AppData\Local\Temp\yhnxdkk.exe
      "C:\Users\Admin\AppData\Local\Temp\yhnxdkk.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Hijack Execution Flow: Executable Installer File Permissions Weakness
      • System policy modification
      PID:4968
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:652

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        fjkpqsnpuuuzouedycptuzac.zee

        • Path C:\Program Files (x86)\fjkpqsnpuuuzouedycptuzac.zee
        • Size 120B
        • SHA256 56dcd5abeac34d19998b233d3277626c45e644fe4d05b53765f518ffb59c1e47
        • MD5 SHA1 SHA512 TLSH

        fjkpqsnpuuuzouedycptuzac.zee

        • Path C:\Program Files (x86)\fjkpqsnpuuuzouedycptuzac.zee
        • Size 120B
        • SHA256 908a32cd4948febda57521e5a7821bf7b6a2dfa9358e0be4f21c9e8dd229bbae
        • MD5 SHA1 SHA512 TLSH

        fjkpqsnpuuuzouedycptuzac.zee

        • Path C:\Program Files (x86)\fjkpqsnpuuuzouedycptuzac.zee
        • Size 120B
        • SHA256 d01603d6bb77a783100187609b476a1b6984600907e22a1721f43fa01b2e4aa9
        • MD5 SHA1 SHA512 TLSH

        fjkpqsnpuuuzouedycptuzac.zee

        • Path C:\Program Files (x86)\fjkpqsnpuuuzouedycptuzac.zee
        • Size 120B
        • SHA256 1622ed2050f07aabbfaa02c6547fb86baaa7476cdebc4d87308611b765372dc9
        • MD5 SHA1 SHA512 TLSH

        fjkpqsnpuuuzouedycptuzac.zee

        • Path C:\Program Files (x86)\fjkpqsnpuuuzouedycptuzac.zee
        • Size 120B
        • SHA256 71e91048dee012c4a66f0a5ddfde99b6925101a4adf0f306e84f6df65a165414
        • MD5 SHA1 SHA512 TLSH

        yhnxdkk.exe

        • Path C:\Users\Admin\AppData\Local\Temp\yhnxdkk.exe
        • Size 1.2MB
        • SHA256 f0e56797f357089776b79caac5a918e899000b2294a4790034fd860c5da9889f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        fjkpqsnpuuuzouedycptuzac.zee

        • Path C:\Users\Admin\AppData\Local\fjkpqsnpuuuzouedycptuzac.zee
        • Size 120B
        • SHA256 d3452b5bfb877f0d3b21193943e1dee8b9cd339fe79afe67c95b29bcfbf09341
        • MD5 SHA1 SHA512 TLSH

        odpfrekxnyjzzqlvbqodpfrekxnyjzzqlvb.odp

        • Path C:\Users\Admin\AppData\Local\odpfrekxnyjzzqlvbqodpfrekxnyjzzqlvb.odp
        • Size 3KB
        • SHA256 bd1094e21c0cb371804e05e78d0d3dc1d28fe3462c05b12eccd056e8c5fd0488
        • MD5 SHA1 SHA512 TLSH