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, 02:46

General

  • Target
    tmpl8d6tlxb.exe
  • Size 320KB
  • Sample260602-c9bcqscs3x
  • SHA256 87ff097ec2c7999dbfda23c162e5e7245543cde546c84c7137b7e3c176fb9e0a
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Pykspa

    Pykspa is a worm spreads via Skype uses DGA and it's written in C++.

  • Detect Pykspa worm 1 IoCs
  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • UAC bypass 3 TTPs 12 IoCs
  • Adds policy Run key to start application 2 TTPs 27 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 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 22 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\tmpl8d6tlxb.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpl8d6tlxb.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:772
    • C:\Users\Admin\AppData\Local\Temp\afoxccj.exe
      "C:\Users\Admin\AppData\Local\Temp\afoxccj.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
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:2768
    • C:\Users\Admin\AppData\Local\Temp\afoxccj.exe
      "C:\Users\Admin\AppData\Local\Temp\afoxccj.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:4732
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4892
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:2392

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          tvbhjgkqwyyljqhfmxnpvbdaek.ssf

          • Path C:\Program Files (x86)\tvbhjgkqwyyljqhfmxnpvbdaek.ssf
          • Size 280B
          • SHA256 03c8d84bad176dd85bd49c7ee6eb8cd843398969bcee5eb8551b3e913edfc2d5
          • MD5 SHA1 SHA512 TLSH

          tvbhjgkqwyyljqhfmxnpvbdaek.ssf

          • Path C:\Program Files (x86)\tvbhjgkqwyyljqhfmxnpvbdaek.ssf
          • Size 280B
          • SHA256 f8db74661a5e2354167ceb904ab9f862c8516acf2f03353c052a31dae39b3c15
          • MD5 SHA1 SHA512 TLSH

          tvbhjgkqwyyljqhfmxnpvbdaek.ssf

          • Path C:\Program Files (x86)\tvbhjgkqwyyljqhfmxnpvbdaek.ssf
          • Size 280B
          • SHA256 c250230b294b4726e96ccee51e15a133352a05632652d48c7b984b535e18e7aa
          • MD5 SHA1 SHA512 TLSH

          tvbhjgkqwyyljqhfmxnpvbdaek.ssf

          • Path C:\Program Files (x86)\tvbhjgkqwyyljqhfmxnpvbdaek.ssf
          • Size 280B
          • SHA256 7b2ae333f0168f7fdafc65fb91a52a943ebff0ca8b1dd770a68ca27f433e993f
          • MD5 SHA1 SHA512 TLSH

          tvbhjgkqwyyljqhfmxnpvbdaek.ssf

          • Path C:\Program Files (x86)\tvbhjgkqwyyljqhfmxnpvbdaek.ssf
          • Size 280B
          • SHA256 e64c7f147fe082ecaa989e1907d810ee235273ee6fcde78d1f27505a6e950393
          • MD5 SHA1 SHA512 TLSH

          afoxccj.exe

          • Path C:\Users\Admin\AppData\Local\Temp\afoxccj.exe
          • Size 700KB
          • SHA256 1e7e4131aaece18486adbd168059291ecdd3a5d4bbf49354acbf46d6ef8c4ca5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          tvbhjgkqwyyljqhfmxnpvbdaek.ssf

          • Path C:\Users\Admin\AppData\Local\tvbhjgkqwyyljqhfmxnpvbdaek.ssf
          • Size 280B
          • SHA256 1accbbeca0e194185c454b311a8e9df702a4a2c5d75f36002ed139e80d2e005a
          • MD5 SHA1 SHA512 TLSH

          uhypckzqhufdmegphderizmujarepnwoqzrno.sjw

          • Path C:\Users\Admin\AppData\Local\uhypckzqhufdmegphderizmujarepnwoqzrno.sjw
          • Size 4KB
          • SHA256 46a08cca703e585e13bac0e31c843584f33f6c2e1335df9774dd0468421ac38a
          • MD5 SHA1 SHA512 SSDEEP TLSH