Overview

overview

10

Static

static

3

tmp5enw3s0i.exe

windows10-ltsc_2021-x64

10

tmp5enw3s0i.exe

windows10-2004-x64

10

tmp5enw3s0i.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, 03:15

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General

  • Target
    tmp5enw3s0i.exe
  • Size 600KB
  • Sample260602-dr8qyscw7x
  • SHA256 08a78a34632f62702c8650bb6cdab080e5bf7bc7228cfed92a5b5de534050332
  • 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 37 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 3 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 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 44 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp5enw3s0i.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp5enw3s0i.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1196
    • C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe
      "C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe" "c:\users\admin\appdata\local\temp\tmp5enw3s0i.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:1240
      • C:\Users\Admin\AppData\Local\Temp\cbpvwfj.exe
        "C:\Users\Admin\AppData\Local\Temp\cbpvwfj.exe" "-C:\Users\Admin\AppData\Local\Temp\bjgvfxkazhznlykb.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:328
      • C:\Users\Admin\AppData\Local\Temp\cbpvwfj.exe
        "C:\Users\Admin\AppData\Local\Temp\cbpvwfj.exe" "-C:\Users\Admin\AppData\Local\Temp\bjgvfxkazhznlykb.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:580
    • C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe
      "C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe" "c:\users\admin\appdata\local\temp\tmp5enw3s0i.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:3580
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3440
  • C:\Windows\ertnczrmqdatwofbqlsfh.exe
    ertnczrmqdatwofbqlsfh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2072
  • C:\Windows\irpfqjxooxqfesfxi.exe
    irpfqjxooxqfesfxi.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1504
    • C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe
      "C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe" "c:\windows\irpfqjxooxqfesfxi.exe*."
      2⤵
      • Executes dropped EXE
      PID:1784
  • C:\Users\Admin\AppData\Local\Temp\pbcvjfwqtfbtvmcxlflx.exe
    C:\Users\Admin\AppData\Local\Temp\pbcvjfwqtfbtvmcxlflx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2604
  • C:\Windows\pbcvjfwqtfbtvmcxlflx.exe
    pbcvjfwqtfbtvmcxlflx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:232
  • C:\Windows\cnnfsndwyjevwmbvibg.exe
    cnnfsndwyjevwmbvibg.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5112
    • C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe
      "C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe" "c:\windows\cnnfsndwyjevwmbvibg.exe*."
      2⤵
      • Executes dropped EXE
      PID:1508
  • C:\Windows\cnnfsndwyjevwmbvibg.exe
    cnnfsndwyjevwmbvibg.exe
    1⤵
    • Executes dropped EXE
    PID:1628
  • C:\Windows\ertnczrmqdatwofbqlsfh.exe
    ertnczrmqdatwofbqlsfh.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2788
    • C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe
      "C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe" "c:\windows\ertnczrmqdatwofbqlsfh.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:4548
  • C:\Users\Admin\AppData\Local\Temp\ertnczrmqdatwofbqlsfh.exe
    C:\Users\Admin\AppData\Local\Temp\ertnczrmqdatwofbqlsfh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1068
  • C:\Users\Admin\AppData\Local\Temp\rbardxmefpjzzocvhz.exe
    C:\Users\Admin\AppData\Local\Temp\rbardxmefpjzzocvhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4008
  • C:\Users\Admin\AppData\Local\Temp\cnnfsndwyjevwmbvibg.exe
    C:\Users\Admin\AppData\Local\Temp\cnnfsndwyjevwmbvibg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:772
  • C:\Windows\bjgvfxkazhznlykb.exe
    bjgvfxkazhznlykb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:920
    • C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe
      "C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe" "c:\windows\bjgvfxkazhznlykb.exe*."
      2⤵
      • Executes dropped EXE
      PID:2696
  • C:\Users\Admin\AppData\Local\Temp\bjgvfxkazhznlykb.exe
    C:\Users\Admin\AppData\Local\Temp\bjgvfxkazhznlykb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3960
  • C:\Windows\bjgvfxkazhznlykb.exe
    bjgvfxkazhznlykb.exe
    1⤵
    • Executes dropped EXE
    PID:1032
  • C:\Windows\rbardxmefpjzzocvhz.exe
    rbardxmefpjzzocvhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4728
  • C:\Windows\pbcvjfwqtfbtvmcxlflx.exe
    pbcvjfwqtfbtvmcxlflx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3368
    • C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe
      "C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe" "c:\windows\pbcvjfwqtfbtvmcxlflx.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:2952
  • C:\Windows\rbardxmefpjzzocvhz.exe
    rbardxmefpjzzocvhz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2088
    • C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe
      "C:\Users\Admin\AppData\Local\Temp\qzsahtyjajc.exe" "c:\windows\rbardxmefpjzzocvhz.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:4488
  • C:\Users\Admin\AppData\Local\Temp\irpfqjxooxqfesfxi.exe
    C:\Users\Admin\AppData\Local\Temp\irpfqjxooxqfesfxi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1848
  • C:\Windows\irpfqjxooxqfesfxi.exe
    irpfqjxooxqfesfxi.exe
    1⤵
    • Executes dropped EXE
    PID:2556

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

        cbpvwfj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\cbpvwfj.exe
        • Size 720KB
        • SHA256 9403c9053066dc01c847b67cd0e9d89a88b932b02437bec7d54a8ca04731f761
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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

        gzhhcfdeohkjsqnpklyrzzu.vwg
        • Path C:\Users\Admin\AppData\Local\gzhhcfdeohkjsqnpklyrzzu.vwg
        • Size 272B
        • SHA256 ee4f0929eb0b242f2487b8762cc7aa6bf57bbd328c5dd8a28aa570150fd7dfd1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        txqbhveqlpdnhqylrdbfyjpdmytxlvpygt.ljn
        • Path C:\Users\Admin\AppData\Local\txqbhveqlpdnhqylrdbfyjpdmytxlvpygt.ljn
        • Size 3KB
        • SHA256 405c792bba63683438f46e008f085768c3a7f3440abf556b8d5c06243ad49a36
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rbardxmefpjzzocvhz.exe
        • Path C:\Windows\SysWOW64\rbardxmefpjzzocvhz.exe
        • Size 600KB
        • SHA256 08a78a34632f62702c8650bb6cdab080e5bf7bc7228cfed92a5b5de534050332
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download