Overview

overview

10

Static

static

3

tmpaqej5yc8.exe

windows10-ltsc_2021-x64

10

tmpaqej5yc8.exe

windows10-2004-x64

10

tmpaqej5yc8.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    149s
  • 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, 03:18

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General

  • Target
    tmpaqej5yc8.exe
  • Size 636KB
  • Sample260602-dtvbcacx21
  • SHA256 59b28f8bdba7b9df8ccddae4d61fe2f9fe7f891ffb9e175d85082812acb86a8b
  • 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 36 IoCs
    persistence
  • Disables RegEdit via registry modification 6 IoCs
    defense_evasion
  • 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 4 IoCs

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

  • 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\tmpaqej5yc8.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpaqej5yc8.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:424
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\users\admin\appdata\local\temp\tmpaqej5yc8.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1164
      • C:\Users\Admin\AppData\Local\Temp\aaqvzjr.exe
        "C:\Users\Admin\AppData\Local\Temp\aaqvzjr.exe" "-C:\Users\Admin\AppData\Local\Temp\zihvibsgqjwpsmkx.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 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:2180
      • C:\Users\Admin\AppData\Local\Temp\aaqvzjr.exe
        "C:\Users\Admin\AppData\Local\Temp\aaqvzjr.exe" "-C:\Users\Admin\AppData\Local\Temp\zihvibsgqjwpsmkx.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:1728
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\users\admin\appdata\local\temp\tmpaqej5yc8.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:4988
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3384
  • C:\Windows\nadvmjewkhyvcactgcjw.exe
    nadvmjewkhyvcactgcjw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2952
  • C:\Windows\zihvibsgqjwpsmkx.exe
    zihvibsgqjwpsmkx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:916
  • C:\Windows\zihvibsgqjwpsmkx.exe
    zihvibsgqjwpsmkx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3288
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\zihvibsgqjwpsmkx.exe*."
      2⤵
      • Executes dropped EXE
      PID:4944
  • C:\Users\Admin\AppData\Local\Temp\pabrgbukwrgbgccrcw.exe
    C:\Users\Admin\AppData\Local\Temp\pabrgbukwrgbgccrcw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1188
  • C:\Users\Admin\AppData\Local\Temp\zihvibsgqjwpsmkx.exe
    C:\Users\Admin\AppData\Local\Temp\zihvibsgqjwpsmkx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2912
  • C:\Users\Admin\AppData\Local\Temp\gqqftnfufznhlgftd.exe
    C:\Users\Admin\AppData\Local\Temp\gqqftnfufznhlgftd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:736
  • C:\Windows\gqqftnfufznhlgftd.exe
    gqqftnfufznhlgftd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:560
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\gqqftnfufznhlgftd.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:3840
  • C:\Windows\gqqftnfufznhlgftd.exe
    gqqftnfufznhlgftd.exe
    1⤵
    • Executes dropped EXE
    PID:3980
  • C:\Windows\amofvrlcplbxdabrdye.exe
    amofvrlcplbxdabrdye.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2512
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\amofvrlcplbxdabrdye.exe*."
      2⤵
      • Executes dropped EXE
      PID:4556
  • C:\Windows\pabrgbukwrgbgccrcw.exe
    pabrgbukwrgbgccrcw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4656
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\pabrgbukwrgbgccrcw.exe*."
      2⤵
      • Executes dropped EXE
      PID:3368
  • C:\Users\Admin\AppData\Local\Temp\amofvrlcplbxdabrdye.exe
    C:\Users\Admin\AppData\Local\Temp\amofvrlcplbxdabrdye.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1028
  • C:\Users\Admin\AppData\Local\Temp\nadvmjewkhyvcactgcjw.exe
    C:\Users\Admin\AppData\Local\Temp\nadvmjewkhyvcactgcjw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4092
  • C:\Windows\nadvmjewkhyvcactgcjw.exe
    nadvmjewkhyvcactgcjw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\nadvmjewkhyvcactgcjw.exe*."
      2⤵
      • Executes dropped EXE
      PID:4588
  • C:\Windows\cqunfdzshfxvdcfxliqei.exe
    cqunfdzshfxvdcfxliqei.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2096
  • C:\Windows\amofvrlcplbxdabrdye.exe
    amofvrlcplbxdabrdye.exe
    1⤵
    • Executes dropped EXE
    PID:3208
  • C:\Windows\cqunfdzshfxvdcfxliqei.exe
    cqunfdzshfxvdcfxliqei.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1704
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\cqunfdzshfxvdcfxliqei.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:4780
  • C:\Windows\pabrgbukwrgbgccrcw.exe
    pabrgbukwrgbgccrcw.exe
    1⤵
    • Executes dropped EXE
    PID:3704
  • C:\Users\Admin\AppData\Local\Temp\cqunfdzshfxvdcfxliqei.exe
    C:\Users\Admin\AppData\Local\Temp\cqunfdzshfxvdcfxliqei.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3068

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        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

        System Information Discovery

        2
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        Lateral Movement

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

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        Downloads

        aaqvzjr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\aaqvzjr.exe
        • Size 728KB
        • SHA256 56605d8967111ab5f9cf284dcfceae804dd4bf80d4398a48c209fa296e33ccb3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nbzohptgxlj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
        • Size 320KB
        • SHA256 0cc02d34d5fd4cf892fed282f98c1ad3e7dd6159a8877ae5c46d3f834ed36060
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        eyihfjlkfjhlzenlfiwqazx.dcx
        • Path C:\Users\Admin\AppData\Local\eyihfjlkfjhlzenlfiwqazx.dcx
        • Size 272B
        • SHA256 51e691c13bfeabb7bd56522eaf7bb4df094bb8d9beb2f362a8078427473e2d60
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rwrbkzmwcrapoeyhmazezjshuekzixwmgp.ihm
        • Path C:\Users\Admin\AppData\Local\rwrbkzmwcrapoeyhmazezjshuekzixwmgp.ihm
        • Size 3KB
        • SHA256 3b4cbcb45919bf6229758310fef324a28b6220c495a3356126304bb8c4324d64
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        pabrgbukwrgbgccrcw.exe
        • Path C:\Windows\SysWOW64\pabrgbukwrgbgccrcw.exe
        • Size 636KB
        • SHA256 59b28f8bdba7b9df8ccddae4d61fe2f9fe7f891ffb9e175d85082812acb86a8b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download