Overview

overview

10

Static

static

3

tmpo0zsaabc.exe

windows10-ltsc_2021-x64

10

tmpo0zsaabc.exe

windows10-2004-x64

10

tmpo0zsaabc.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • 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, 04:05

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General

  • Target
    tmpo0zsaabc.exe
  • Size 600KB
  • Sample260602-env65adw3s
  • SHA256 e8c5d69d398d38ffc015c0c1a0f930b862c84661ee6760c41ed28f78dfe89ec5
  • 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
  • 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 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 7 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 20 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\tmpo0zsaabc.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpo0zsaabc.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3384
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\users\admin\appdata\local\temp\tmpo0zsaabc.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:3564
      • C:\Users\Admin\AppData\Local\Temp\puzegn.exe
        "C:\Users\Admin\AppData\Local\Temp\puzegn.exe" "-C:\Users\Admin\AppData\Local\Temp\bqfugxqbyimitmxh.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:2316
      • C:\Users\Admin\AppData\Local\Temp\puzegn.exe
        "C:\Users\Admin\AppData\Local\Temp\puzegn.exe" "-C:\Users\Admin\AppData\Local\Temp\bqfugxqbyimitmxh.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:1312
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\users\admin\appdata\local\temp\tmpo0zsaabc.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:4696
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3352
  • C:\Users\Admin\AppData\Local\Temp\rizqexsfeqwuhcpbqx.exe
    C:\Users\Admin\AppData\Local\Temp\rizqexsfeqwuhcpbqx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1424
  • C:\Windows\pibukfcrsgoodapdudle.exe
    pibukfcrsgoodapdudle.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1376
  • C:\Windows\rizqexsfeqwuhcpbqx.exe
    rizqexsfeqwuhcpbqx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1624
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\rizqexsfeqwuhcpbqx.exe*."
      2⤵
      • Executes dropped EXE
      PID:464
  • C:\Windows\bqfugxqbyimitmxh.exe
    bqfugxqbyimitmxh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5080
  • C:\Users\Admin\AppData\Local\Temp\iyoerjdpnydamgsdr.exe
    C:\Users\Admin\AppData\Local\Temp\iyoerjdpnydamgsdr.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1016
  • C:\Windows\eysmdzxnpenoecshzjsmg.exe
    eysmdzxnpenoecshzjsmg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:744
  • C:\Windows\iyoerjdpnydamgsdr.exe
    iyoerjdpnydamgsdr.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4288
  • C:\Users\Admin\AppData\Local\Temp\bqfugxqbyimitmxh.exe
    C:\Users\Admin\AppData\Local\Temp\bqfugxqbyimitmxh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1376
  • C:\Windows\bqfugxqbyimitmxh.exe
    bqfugxqbyimitmxh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2184
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\bqfugxqbyimitmxh.exe*."
      2⤵
      • Executes dropped EXE
      PID:720
  • C:\Windows\iyoerjdpnydamgsdr.exe
    iyoerjdpnydamgsdr.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\iyoerjdpnydamgsdr.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:4280
  • C:\Windows\rizqexsfeqwuhcpbqx.exe
    rizqexsfeqwuhcpbqx.exe
    1⤵
    • Executes dropped EXE
    PID:2052
  • C:\Users\Admin\AppData\Local\Temp\eysmdzxnpenoecshzjsmg.exe
    C:\Users\Admin\AppData\Local\Temp\eysmdzxnpenoecshzjsmg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1084
  • C:\Windows\cumetnjxxkrqeaobrzg.exe
    cumetnjxxkrqeaobrzg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1632
  • C:\Windows\cumetnjxxkrqeaobrzg.exe
    cumetnjxxkrqeaobrzg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3912
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\cumetnjxxkrqeaobrzg.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:4160
  • C:\Users\Admin\AppData\Local\Temp\cumetnjxxkrqeaobrzg.exe
    C:\Users\Admin\AppData\Local\Temp\cumetnjxxkrqeaobrzg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4532
  • C:\Users\Admin\AppData\Local\Temp\pibukfcrsgoodapdudle.exe
    C:\Users\Admin\AppData\Local\Temp\pibukfcrsgoodapdudle.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1676
  • C:\Windows\pibukfcrsgoodapdudle.exe
    pibukfcrsgoodapdudle.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2528
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\pibukfcrsgoodapdudle.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:1532
  • C:\Windows\eysmdzxnpenoecshzjsmg.exe
    eysmdzxnpenoecshzjsmg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2988
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\eysmdzxnpenoecshzjsmg.exe*."
      2⤵
      • Executes dropped EXE
      PID:4140

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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        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

        vybeejqpayqazgfdexpsvyydkj.sku
        • Path C:\Program Files (x86)\vybeejqpayqazgfdexpsvyydkj.sku
        • Size 272B
        • SHA256 55617c7f04a8b3bd871ca6bea5419319f750ad09d9b09162cb49619760a044b4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        vybeejqpayqazgfdexpsvyydkj.sku
        • Path C:\Program Files (x86)\vybeejqpayqazgfdexpsvyydkj.sku
        • Size 272B
        • SHA256 fbee3329590a7960551d861183d391c0b2d81c6200b4a86fec8118c4fc7e9091
        • MD5 SHA1 SHA512 TLSH
        Submit Download

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

        puzegn.exe
        • Path C:\Users\Admin\AppData\Local\Temp\puzegn.exe
        • Size 716KB
        • SHA256 acdf2227dd5ae2c90e390b123f30b6deed0cbff55f71a368a2770cd94d518d13
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vybeejqpayqazgfdexpsvyydkj.sku
        • Path C:\Users\Admin\AppData\Local\vybeejqpayqazgfdexpsvyydkj.sku
        • Size 272B
        • SHA256 a3764e2e466a163c569adc9a378b1aa0d719c65cabdd13d88c00d846be36c74e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wkymxnfpluxscuenzdguiwhxpzvehcmeoxjnq.sgr
        • Path C:\Users\Admin\AppData\Local\wkymxnfpluxscuenzdguiwhxpzvehcmeoxjnq.sgr
        • Size 3KB
        • SHA256 c9b9e2b1f948431ad0dbeea6ce0ada0b71e414d7c20d7ba80a3a47aac17cb60a
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rizqexsfeqwuhcpbqx.exe
        • Path C:\Windows\SysWOW64\rizqexsfeqwuhcpbqx.exe
        • Size 600KB
        • SHA256 e8c5d69d398d38ffc015c0c1a0f930b862c84661ee6760c41ed28f78dfe89ec5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download