Analysis

  • max time kernel
    125s
  • max time network
    152s
  • 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, 02:22

General

  • Target
    tmpggakvmnv.exe
  • Size 704KB
  • Sample260602-ctr1jsc12n
  • SHA256 5ec6150b0651aa8e84bd32475facb475d01b3de2f32c31834e28bac15e94e334
  • 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 28 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 3 IoCs

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

  • Modifies registry class 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 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\tmpggakvmnv.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpggakvmnv.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
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1308
    • C:\Users\Admin\AppData\Local\Temp\zafrw.exe
      "C:\Users\Admin\AppData\Local\Temp\zafrw.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:2156
    • C:\Users\Admin\AppData\Local\Temp\zafrw.exe
      "C:\Users\Admin\AppData\Local\Temp\zafrw.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 Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: GetForegroundWindowSpam
      • System policy modification
      PID:4748
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1776
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:436

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          byzhiieelhxrxlaqnrtqrza.wwd

          • Path C:\Program Files (x86)\byzhiieelhxrxlaqnrtqrza.wwd
          • Size 280B
          • SHA256 353891eec3a576621d4fdc718058356ad8a6b618ff4d6b0a6d5a80d5b8957d0a
          • MD5 SHA1 SHA512 TLSH

          byzhiieelhxrxlaqnrtqrza.wwd

          • Path C:\Program Files (x86)\byzhiieelhxrxlaqnrtqrza.wwd
          • Size 280B
          • SHA256 6bfda83e72e0baeed5b08493a36ff253e9d48bfccc2c001ce29641d1c3bee882
          • MD5 SHA1 SHA512 TLSH

          zafrw.exe

          • Path C:\Users\Admin\AppData\Local\Temp\zafrw.exe
          • Size 1.3MB
          • SHA256 fac8903834ea5f5cd1acab15ffa1e6ac5861c13341b41e14d262ed83a475d8d7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          byzhiieelhxrxlaqnrtqrza.wwd

          • Path C:\Users\Admin\AppData\Local\byzhiieelhxrxlaqnrtqrza.wwd
          • Size 280B
          • SHA256 dcd5c04c4cf733b1e1a18d9f0172878efc8a5e930fbc2ac5628b1766f4c490d7
          • MD5 SHA1 SHA512 TLSH

          owibnyfqipqvmllmujweqjvgnyqxyduttu.rem

          • Path C:\Users\Admin\AppData\Local\owibnyfqipqvmllmujweqjvgnyqxyduttu.rem
          • Size 4KB
          • SHA256 3356ff46c0b85d6e57f56bf6ea475be00fda1be2e0a3da684296a9fb52716fb8
          • MD5 SHA1 SHA512 SSDEEP TLSH