Overview

overview

10

Static

static

3

tmpezjgcmmq.exe

windows10-2004-x64

10

tmpezjgcmmq.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    22/05/2026, 14:28

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General

  • Target
    tmpezjgcmmq.exe
  • Size 1016KB
  • Sample260522-rtccesdz2l
  • SHA256 caa283a64056eb7cd81887d12b80e19664f7bcde76175855ce0ebd534a844393
  • 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 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 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 autorun.inf file 1 TTPs 4 IoCs

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

  • 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\tmpezjgcmmq.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpezjgcmmq.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2072
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\users\admin\appdata\local\temp\tmpezjgcmmq.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:3788
      • C:\Users\Admin\AppData\Local\Temp\omzyeq.exe
        "C:\Users\Admin\AppData\Local\Temp\omzyeq.exe" "-C:\Users\Admin\AppData\Local\Temp\aifoeakbujyuctmc.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:1580
      • C:\Users\Admin\AppData\Local\Temp\omzyeq.exe
        "C:\Users\Admin\AppData\Local\Temp\omzyeq.exe" "-C:\Users\Admin\AppData\Local\Temp\aifoeakbujyuctmc.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:3360
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\users\admin\appdata\local\temp\tmpezjgcmmq.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:2360
  • C:\Windows\oaboiiwrohaamheymykw.exe
    oaboiiwrohaamheymykw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4340
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\oaboiiwrohaamheymykw.exe*."
      2⤵
      • Executes dropped EXE
      PID:1944
  • C:\Windows\oaboiiwrohaamheymykw.exe
    oaboiiwrohaamheymykw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2424
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:604
  • C:\Windows\aifoeakbujyuctmc.exe
    aifoeakbujyuctmc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4796
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\aifoeakbujyuctmc.exe*."
      2⤵
      • Executes dropped EXE
      PID:1060
  • C:\Users\Admin\AppData\Local\Temp\hqoypmxpjzpmvnhyj.exe
    C:\Users\Admin\AppData\Local\Temp\hqoypmxpjzpmvnhyj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4324
  • C:\Users\Admin\AppData\Local\Temp\oaboiiwrohaamheymykw.exe
    C:\Users\Admin\AppData\Local\Temp\oaboiiwrohaamheymykw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1192
  • C:\Windows\bmmyrqdxtldcnhdwjuf.exe
    bmmyrqdxtldcnhdwjuf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3056
  • C:\Windows\hqoypmxpjzpmvnhyj.exe
    hqoypmxpjzpmvnhyj.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1208
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\hqoypmxpjzpmvnhyj.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:3516
  • C:\Users\Admin\AppData\Local\Temp\qazkcamfarigqjewis.exe
    C:\Users\Admin\AppData\Local\Temp\qazkcamfarigqjewis.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2404
  • C:\Windows\qazkcamfarigqjewis.exe
    qazkcamfarigqjewis.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:912
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\qazkcamfarigqjewis.exe*."
      2⤵
      • Executes dropped EXE
      PID:2720
  • C:\Windows\aifoeakbujyuctmc.exe
    aifoeakbujyuctmc.exe
    1⤵
    • Executes dropped EXE
    PID:2784
  • C:\Windows\dqsgbcrnlfzanjhcrereg.exe
    dqsgbcrnlfzanjhcrereg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3680
  • C:\Users\Admin\AppData\Local\Temp\bmmyrqdxtldcnhdwjuf.exe
    C:\Users\Admin\AppData\Local\Temp\bmmyrqdxtldcnhdwjuf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2572
  • C:\Users\Admin\AppData\Local\Temp\dqsgbcrnlfzanjhcrereg.exe
    C:\Users\Admin\AppData\Local\Temp\dqsgbcrnlfzanjhcrereg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5008
  • C:\Windows\dqsgbcrnlfzanjhcrereg.exe
    dqsgbcrnlfzanjhcrereg.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:768
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\dqsgbcrnlfzanjhcrereg.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:3816
  • C:\Windows\hqoypmxpjzpmvnhyj.exe
    hqoypmxpjzpmvnhyj.exe
    1⤵
    • Executes dropped EXE
    PID:1056
  • C:\Users\Admin\AppData\Local\Temp\aifoeakbujyuctmc.exe
    C:\Users\Admin\AppData\Local\Temp\aifoeakbujyuctmc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:756
  • C:\Windows\qazkcamfarigqjewis.exe
    qazkcamfarigqjewis.exe
    1⤵
    • Executes dropped EXE
    PID:1820
  • C:\Windows\bmmyrqdxtldcnhdwjuf.exe
    bmmyrqdxtldcnhdwjuf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3128
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\bmmyrqdxtldcnhdwjuf.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:2424

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

        System Information Discovery

        2
        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

        Loading Replay Monitor...

        Downloads

        fwcutyrrtrpullnmfwnek.bgz
        • Path C:\Program Files (x86)\fwcutyrrtrpullnmfwnek.bgz
        • Size 280B
        • SHA256 53e4117674a5a94aa2cc69e9fceae19c6d6bdfaf5eb0d19cdb0acf6b683f1eda
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fwcutyrrtrpullnmfwnek.bgz
        • Path C:\Program Files (x86)\fwcutyrrtrpullnmfwnek.bgz
        • Size 280B
        • SHA256 34595263d48a5b12f76b48a5969efc84d2de0fb5c920876fe3adb8a40361f63d
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        omzyeq.exe
        • Path C:\Users\Admin\AppData\Local\Temp\omzyeq.exe
        • Size 708KB
        • SHA256 9386fad1c73b7d33f93d67120165d768658f1c871450c9df5c717a6cd32c3921
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        pgjvjuzczqt.exe
        • Path C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
        • Size 320KB
        • SHA256 cf6475b4439ac75e5a886627ddf96a312c1f8dedb0a4a1b4378d346825271b40
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        actwgwalyhqgitgquwyarueuyjwfoegr.osu
        • Path C:\Users\Admin\AppData\Local\actwgwalyhqgitgquwyarueuyjwfoegr.osu
        • Size 4KB
        • SHA256 1a5755611aed0e96c88d0479df79764b73e0b74d2ed767a96308bd5929ac9d1e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        fwcutyrrtrpullnmfwnek.bgz
        • Path C:\Users\Admin\AppData\Local\fwcutyrrtrpullnmfwnek.bgz
        • Size 280B
        • SHA256 66877cd0f1ba518ca50dd2bc24b7529b12b9ac2875e59a7a5d91ee6698d1291f
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fwcutyrrtrpullnmfwnek.bgz
        • Path C:\Users\Admin\AppData\Local\fwcutyrrtrpullnmfwnek.bgz
        • Size 280B
        • SHA256 4fec05d5c43c8b895e44da5dd067a1f706bf2901021690b35742a7b5d38c7194
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qazkcamfarigqjewis.exe
        • Path C:\Windows\SysWOW64\qazkcamfarigqjewis.exe
        • Size 1016KB
        • SHA256 caa283a64056eb7cd81887d12b80e19664f7bcde76175855ce0ebd534a844393
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download