Overview

overview

10

Static

static

3

tmpea3_0o5w.exe

windows10-ltsc_2021-x64

10

tmpea3_0o5w.exe

windows10-2004-x64

10

tmpea3_0o5w.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • 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, 02:40

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General

  • Target
    tmpea3_0o5w.exe
  • Size 548KB
  • Sample260602-c6bt4ab16x
  • SHA256 93dad180c872ea5559bda259877c595b25653a14ec5bdb86ddb9f3d3c0fb4585
  • 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 7 IoCs
    persistence
  • UAC bypass 3 TTPs 16 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 39 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 14 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 53 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 53 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 17 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 44 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpea3_0o5w.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpea3_0o5w.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:916
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\users\admin\appdata\local\temp\tmpea3_0o5w.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:1652
      • C:\Users\Admin\AppData\Local\Temp\htbbit.exe
        "C:\Users\Admin\AppData\Local\Temp\htbbit.exe" "-C:\Users\Admin\AppData\Local\Temp\tphridseyjwpsmkx.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:1376
      • C:\Users\Admin\AppData\Local\Temp\htbbit.exe
        "C:\Users\Admin\AppData\Local\Temp\htbbit.exe" "-C:\Users\Admin\AppData\Local\Temp\tphridseyjwpsmkx.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:4720
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\users\admin\appdata\local\temp\tmpea3_0o5w.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:3500
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4864
  • C:\Windows\wxujffzqpfxvdcfxlikli.exe
    wxujffzqpfxvdcfxlikli.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2380
  • C:\Windows\axqbtpfsnznhlgftd.exe
    axqbtpfsnznhlgftd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3572
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\axqbtpfsnznhlgftd.exe*."
      2⤵
      • Executes dropped EXE
      PID:2308
  • C:\Windows\hhdrmleushyvcactgcdd.exe
    hhdrmleushyvcactgcdd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4852
  • C:\Users\Admin\AppData\Local\Temp\tphridseyjwpsmkx.exe
    C:\Users\Admin\AppData\Local\Temp\tphridseyjwpsmkx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:652
  • C:\Windows\tphridseyjwpsmkx.exe
    tphridseyjwpsmkx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1636
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\tphridseyjwpsmkx.exe*."
      2⤵
      • Executes dropped EXE
      PID:124
  • C:\Users\Admin\AppData\Local\Temp\axqbtpfsnznhlgftd.exe
    C:\Users\Admin\AppData\Local\Temp\axqbtpfsnznhlgftd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2824
  • C:\Windows\axqbtpfsnznhlgftd.exe
    axqbtpfsnznhlgftd.exe
    1⤵
    • Executes dropped EXE
    PID:428
  • C:\Windows\tphridseyjwpsmkx.exe
    tphridseyjwpsmkx.exe
    1⤵
    • Executes dropped EXE
    PID:3872
  • C:\Users\Admin\AppData\Local\Temp\hhdrmleushyvcactgcdd.exe
    C:\Users\Admin\AppData\Local\Temp\hhdrmleushyvcactgcdd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1576
  • C:\Windows\wxujffzqpfxvdcfxlikli.exe
    wxujffzqpfxvdcfxlikli.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2932
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\wxujffzqpfxvdcfxlikli.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:3924
  • C:\Windows\utobvtlaxlbxdabrdyy.exe
    utobvtlaxlbxdabrdyy.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3420
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\utobvtlaxlbxdabrdyy.exe*."
      2⤵
      • Executes dropped EXE
      PID:3424
  • C:\Users\Admin\AppData\Local\Temp\utobvtlaxlbxdabrdyy.exe
    C:\Users\Admin\AppData\Local\Temp\utobvtlaxlbxdabrdyy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2536
  • C:\Windows\utobvtlaxlbxdabrdyy.exe
    utobvtlaxlbxdabrdyy.exe
    1⤵
    • Executes dropped EXE
    PID:2456
  • C:\Windows\hhdrmleushyvcactgcdd.exe
    hhdrmleushyvcactgcdd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:240
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\hhdrmleushyvcactgcdd.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:2332
  • C:\Users\Admin\AppData\Local\Temp\jhbngduiergbgccrcw.exe
    C:\Users\Admin\AppData\Local\Temp\jhbngduiergbgccrcw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:580
  • C:\Users\Admin\AppData\Local\Temp\wxujffzqpfxvdcfxlikli.exe
    C:\Users\Admin\AppData\Local\Temp\wxujffzqpfxvdcfxlikli.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:824
  • C:\Windows\jhbngduiergbgccrcw.exe
    jhbngduiergbgccrcw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4956
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\jhbngduiergbgccrcw.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:3140
  • C:\Windows\jhbngduiergbgccrcw.exe
    jhbngduiergbgccrcw.exe
    1⤵
    • Executes dropped EXE
    PID:3312

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

        Loading Replay Monitor...

        Downloads

        bjnjmtusyvuzouedycltxtwd.cif
        • Path C:\Program Files (x86)\bjnjmtusyvuzouedycltxtwd.cif
        • Size 280B
        • SHA256 0c8f45113f7ea9398260cf8b80522cef7308ac55a46df142fd047b1376dd6536
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        htbbit.exe
        • Path C:\Users\Admin\AppData\Local\Temp\htbbit.exe
        • Size 704KB
        • SHA256 4e78b59491ea719d616766e82be1e17e2be1cf326045cff7ed69e8751fe7bf7f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nbzohptgxlj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
        • Size 320KB
        • SHA256 2bedb593b0e9377d7df60dbba158f5f4c03b6168308ec86a46157b84158ec649
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        bjnjmtusyvuzouedycltxtwd.cif
        • Path C:\Users\Admin\AppData\Local\bjnjmtusyvuzouedycltxtwd.cif
        • Size 280B
        • SHA256 117fdb6135415c5f06543ffd1d6e522a5f49124075e505ad4c3ec10ffb14df63
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        kdsznfrarzjzzqlvbqkdsznfrarzjzzqlvb.kds
        • Path C:\Users\Admin\AppData\Local\kdsznfrarzjzzqlvbqkdsznfrarzjzzqlvb.kds
        • Size 4KB
        • SHA256 66b5e12638ef7f67710889386d3c04eb892dc93dd011865013343bbec45f0dd3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        jhbngduiergbgccrcw.exe
        • Path C:\Windows\SysWOW64\jhbngduiergbgccrcw.exe
        • Size 548KB
        • SHA256 93dad180c872ea5559bda259877c595b25653a14ec5bdb86ddb9f3d3c0fb4585
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download