Overview

overview

10

Static

static

3

tmp4st_eqfa.exe

windows10-ltsc_2021-x64

10

tmp4st_eqfa.exe

windows10-2004-x64

10

tmp4st_eqfa.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/06/2026, 02:49

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General

  • Target
    tmp4st_eqfa.exe
  • Size 1016KB
  • Sample260602-da59hadv9r
  • SHA256 e7b8980122468ba6ef5c55324f392258f224365b97750983c127e96cd1a0f926
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoverypykspapersistenceprivilege_escalationtrojanworm

Malware Config

Signatures

  • Family: Pykspa

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

    wormpykspa
  • Detect Pykspa worm 2 IoCs
    worm
  • Modifies WinLogon for persistence 2 TTPs 6 IoCs
    persistence
  • UAC bypass 3 TTPs 15 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 33 IoCs
    persistence
  • Disables RegEdit via registry modification 6 IoCs
    defense_evasion
  • Checks computer location settings 2 TTPs 8 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 28 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 6 IoCs
    defense_evasion
  • Adds Run key to start application 2 TTPs 64 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 12 IoCs
    defense_evasiontrojan
  • Hijack Execution Flow: Executable Installer File Permissions Weakness 1 TTPs 3 IoCs

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

    defense_evasionpersistenceprivilege_escalation
  • Looks up external IP address via web service 8 IoCs

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

  • Drops autorun.inf file 1 TTPs 4 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 46 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 46 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 18 IoCs

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

    discovery
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • System policy modification 1 TTPs 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp4st_eqfa.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp4st_eqfa.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4532
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\users\admin\appdata\local\temp\tmp4st_eqfa.exe*"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Checks computer location settings
      • Executes dropped EXE
      • 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 Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:3156
      • C:\Users\Admin\AppData\Local\Temp\afqpcho.exe
        "C:\Users\Admin\AppData\Local\Temp\afqpcho.exe" "-C:\Users\Admin\AppData\Local\Temp\znhplzpbyhejxydt.exe"
        3⤵
        • 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 autorun.inf file
        • 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:5016
      • C:\Users\Admin\AppData\Local\Temp\afqpcho.exe
        "C:\Users\Admin\AppData\Local\Temp\afqpcho.exe" "-C:\Users\Admin\AppData\Local\Temp\znhplzpbyhejxydt.exe"
        3⤵
        • 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
        • Drops file in System32 directory
        • Drops file in Windows directory
        • System policy modification
        PID:2400
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\users\admin\appdata\local\temp\tmp4st_eqfa.exe"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:1788
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2636
  • C:\Windows\znhplzpbyhejxydt.exe
    znhplzpbyhejxydt.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3568
  • C:\Windows\arozypixxjjrimunghe.exe
    arozypixxjjrimunghe.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2716
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\arozypixxjjrimunghe.exe*."
      2⤵
      • Executes dropped EXE
      PID:5408
  • C:\Users\Admin\AppData\Local\Temp\cvuhibwnpdfpioytorqji.exe
    C:\Users\Admin\AppData\Local\Temp\cvuhibwnpdfpioytorqji.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3464
  • C:\Windows\cvuhibwnpdfpioytorqji.exe
    cvuhibwnpdfpioytorqji.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1220
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\cvuhibwnpdfpioytorqji.exe*."
      2⤵
      • Executes dropped EXE
      PID:3724
  • C:\Users\Admin\AppData\Local\Temp\gvqzwlcpnxvbqsypg.exe
    C:\Users\Admin\AppData\Local\Temp\gvqzwlcpnxvbqsypg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3840
  • C:\Windows\pfbljzrfepovlovnff.exe
    pfbljzrfepovlovnff.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3852
  • C:\Windows\arozypixxjjrimunghe.exe
    arozypixxjjrimunghe.exe
    1⤵
    • Executes dropped EXE
    PID:5292
  • C:\Windows\pfbljzrfepovlovnff.exe
    pfbljzrfepovlovnff.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3968
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\pfbljzrfepovlovnff.exe*."
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:3012
  • C:\Windows\nfdpphbrsfgphmvpjljb.exe
    nfdpphbrsfgphmvpjljb.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4568
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\nfdpphbrsfgphmvpjljb.exe*."
      2⤵
      • Executes dropped EXE
      PID:844
  • C:\Users\Admin\AppData\Local\Temp\nfdpphbrsfgphmvpjljb.exe
    C:\Users\Admin\AppData\Local\Temp\nfdpphbrsfgphmvpjljb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4348
  • C:\Windows\znhplzpbyhejxydt.exe
    znhplzpbyhejxydt.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4312
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\znhplzpbyhejxydt.exe*."
      2⤵
      • Executes dropped EXE
      PID:4092
  • C:\Windows\gvqzwlcpnxvbqsypg.exe
    gvqzwlcpnxvbqsypg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:632
  • C:\Windows\nfdpphbrsfgphmvpjljb.exe
    nfdpphbrsfgphmvpjljb.exe
    1⤵
    • Executes dropped EXE
    PID:5456
  • C:\Users\Admin\AppData\Local\Temp\znhplzpbyhejxydt.exe
    C:\Users\Admin\AppData\Local\Temp\znhplzpbyhejxydt.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2004
  • C:\Users\Admin\AppData\Local\Temp\pfbljzrfepovlovnff.exe
    C:\Users\Admin\AppData\Local\Temp\pfbljzrfepovlovnff.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5908
  • C:\Users\Admin\AppData\Local\Temp\arozypixxjjrimunghe.exe
    C:\Users\Admin\AppData\Local\Temp\arozypixxjjrimunghe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1844
  • C:\Windows\cvuhibwnpdfpioytorqji.exe
    cvuhibwnpdfpioytorqji.exe
    1⤵
    • Executes dropped EXE
    PID:5628
  • C:\Windows\gvqzwlcpnxvbqsypg.exe
    gvqzwlcpnxvbqsypg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3252
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\gvqzwlcpnxvbqsypg.exe*."
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:1772

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        Replication Through Removable Media

        1
        T1091

        Execution

        Persistence

        Boot or Logon Autostart Execution

        3
        T1547

        Registry Run Keys / Startup Folder

        2
        T1547.001

        Winlogon Helper DLL

        1
        T1547.004

        Hijack Execution Flow

        1
        T1574

        Executable Installer File Permissions Weakness

        1
        T1574.005

        Privilege Escalation

        Abuse Elevation Control Mechanism

        1
        T1548

        Bypass User Account Control

        1
        T1548.002

        Boot or Logon Autostart Execution

        3
        T1547

        Registry Run Keys / Startup Folder

        2
        T1547.001

        Winlogon Helper DLL

        1
        T1547.004

        Hijack Execution Flow

        1
        T1574

        Executable Installer File Permissions Weakness

        1
        T1574.005

        Defense Evasion

        Abuse Elevation Control Mechanism

        1
        T1548

        Bypass User Account Control

        1
        T1548.002

        Hijack Execution Flow

        1
        T1574

        Executable Installer File Permissions Weakness

        1
        T1574.005

        Impair Defenses

        2
        T1562

        Disable or Modify Tools

        1
        T1562.001

        Safe Mode Boot

        1
        T1562.009

        Modify Registry

        5
        T1112

        Credential Access

        Discovery

        Query Registry

        1
        T1012

        System Information Discovery

        3
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        Lateral Movement

        Replication Through Removable Media

        1
        T1091

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

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        Downloads

        ebevaxwrxpvjgqedcjmjm.ife
        • Path C:\Program Files (x86)\ebevaxwrxpvjgqedcjmjm.ife
        • Size 280B
        • SHA256 4e02321e92d50d4c484e7cefe2a9c36b1248556e3ece22f6a26522a11d6cdc78
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ebevaxwrxpvjgqedcjmjm.ife
        • Path C:\Program Files (x86)\ebevaxwrxpvjgqedcjmjm.ife
        • Size 280B
        • SHA256 9b5b654cf3d2a5279ad6c89e2631201cdea1483e7cb80601dba8c8a075212ea8
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ebevaxwrxpvjgqedcjmjm.ife
        • Path C:\Program Files (x86)\ebevaxwrxpvjgqedcjmjm.ife
        • Size 280B
        • SHA256 b5193822f4a8d1788d36fa8d8736bc96a283e2d95f64278f0d37dac111ff48fc
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        afqpcho.exe
        • Path C:\Users\Admin\AppData\Local\Temp\afqpcho.exe
        • Size 692KB
        • SHA256 08bee23674d8c7694d4a62f3133ca32c43656a0302ac90da15f28b0f1c946165
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vveaalwpffo.exe
        • Path C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
        • Size 320KB
        • SHA256 355e5d320ec7e5a7fb0f6bf26d91e316b39e071f7b9897590df7f49238cc29cc
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ebevaxwrxpvjgqedcjmjm.ife
        • Path C:\Users\Admin\AppData\Local\ebevaxwrxpvjgqedcjmjm.ife
        • Size 280B
        • SHA256 cdf727547e2958a5e233da5532302b53dd3c25331e7fadadd8ea9270b14a15d5
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        zhvxnvflcfwvdyxhrjxftvltdjadutbw.fph
        • Path C:\Users\Admin\AppData\Local\zhvxnvflcfwvdyxhrjxftvltdjadutbw.fph
        • Size 4KB
        • SHA256 66571a2f459de91cb4ab0dc3bc4136980822e3bafe1ed471fc172ea90bef777e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        pfbljzrfepovlovnff.exe
        • Path C:\Windows\SysWOW64\pfbljzrfepovlovnff.exe
        • Size 1016KB
        • SHA256 e7b8980122468ba6ef5c55324f392258f224365b97750983c127e96cd1a0f926
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        afqpcho.bat
        • Path C:\afqpcho.bat
        • Size 520KB
        • SHA256 21779bf60150d28b94c73fb6ea779c8b04e52eb6acd64e6d0d954942b93413cb
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download