Overview

overview

10

Static

static

3

tmpyy3uz2ho.exe

windows10-2004-x64

10

tmpyy3uz2ho.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    154s
  • 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, 15:46

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General

  • Target
    tmpyy3uz2ho.exe
  • Size 504KB
  • Sample260522-s7wtnaax21
  • SHA256 5cfbb752301e333149e30a0c824012b94531d8af2c42bbec55c3a0233b19c916
  • 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 autorun.inf file 1 TTPs 4 IoCs

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

  • 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 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpyy3uz2ho.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpyy3uz2ho.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4868
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\users\admin\appdata\local\temp\tmpyy3uz2ho.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:1752
      • C:\Users\Admin\AppData\Local\Temp\ddhpr.exe
        "C:\Users\Admin\AppData\Local\Temp\ddhpr.exe" "-C:\Users\Admin\AppData\Local\Temp\alatgbnathbolkcw.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:5840
      • C:\Users\Admin\AppData\Local\Temp\ddhpr.exe
        "C:\Users\Admin\AppData\Local\Temp\ddhpr.exe" "-C:\Users\Admin\AppData\Local\Temp\alatgbnathbolkcw.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:1660
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\users\admin\appdata\local\temp\tmpyy3uz2ho.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:1524
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5112
  • C:\Windows\dtnlddumkdcuwaxwynrhb.exe
    dtnlddumkdcuwaxwynrhb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1148
  • C:\Windows\bphdtrgwsjgwwytqqdf.exe
    bphdtrgwsjgwwytqqdf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\bphdtrgwsjgwwytqqdf.exe*."
      2⤵
      • Executes dropped EXE
      PID:5680
  • C:\Users\Admin\AppData\Local\Temp\htjdrnaoixsgeexsq.exe
    C:\Users\Admin\AppData\Local\Temp\htjdrnaoixsgeexsq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4632
  • C:\Windows\alatgbnathbolkcw.exe
    alatgbnathbolkcw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3732
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\alatgbnathbolkcw.exe*."
      2⤵
      • Executes dropped EXE
      PID:5456
  • C:\Windows\bphdtrgwsjgwwytqqdf.exe
    bphdtrgwsjgwwytqqdf.exe
    1⤵
    • Executes dropped EXE
    PID:1144
  • C:\Users\Admin\AppData\Local\Temp\dtnlddumkdcuwaxwynrhb.exe
    C:\Users\Admin\AppData\Local\Temp\dtnlddumkdcuwaxwynrhb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2116
  • C:\Windows\htjdrnaoixsgeexsq.exe
    htjdrnaoixsgeexsq.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5452
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\htjdrnaoixsgeexsq.exe*."
      2⤵
      • Executes dropped EXE
      PID:4416
  • C:\Windows\odwtkjzqnfduvyusthkz.exe
    odwtkjzqnfduvyusthkz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:448
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\odwtkjzqnfduvyusthkz.exe*."
      2⤵
      • Executes dropped EXE
      PID:4376
  • C:\Windows\qdupebpezplazauqpb.exe
    qdupebpezplazauqpb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5468
  • C:\Windows\htjdrnaoixsgeexsq.exe
    htjdrnaoixsgeexsq.exe
    1⤵
    • Executes dropped EXE
    PID:1708
  • C:\Users\Admin\AppData\Local\Temp\qdupebpezplazauqpb.exe
    C:\Users\Admin\AppData\Local\Temp\qdupebpezplazauqpb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:6096
  • C:\Users\Admin\AppData\Local\Temp\odwtkjzqnfduvyusthkz.exe
    C:\Users\Admin\AppData\Local\Temp\odwtkjzqnfduvyusthkz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:496
  • C:\Windows\dtnlddumkdcuwaxwynrhb.exe
    dtnlddumkdcuwaxwynrhb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1564
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\dtnlddumkdcuwaxwynrhb.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:2432
  • C:\Users\Admin\AppData\Local\Temp\alatgbnathbolkcw.exe
    C:\Users\Admin\AppData\Local\Temp\alatgbnathbolkcw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3792
  • C:\Windows\odwtkjzqnfduvyusthkz.exe
    odwtkjzqnfduvyusthkz.exe
    1⤵
    • Executes dropped EXE
    PID:1652
  • C:\Windows\alatgbnathbolkcw.exe
    alatgbnathbolkcw.exe
    1⤵
    • Executes dropped EXE
    PID:5416
  • C:\Windows\qdupebpezplazauqpb.exe
    qdupebpezplazauqpb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4040
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\qdupebpezplazauqpb.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:5644
  • C:\Users\Admin\AppData\Local\Temp\bphdtrgwsjgwwytqqdf.exe
    C:\Users\Admin\AppData\Local\Temp\bphdtrgwsjgwwytqqdf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3188

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

        nlnttbaaghooykpwgdpnpvvdc.ijq
        • Path C:\Program Files (x86)\nlnttbaaghooykpwgdpnpvvdc.ijq
        • Size 272B
        • SHA256 7a32a0d1b1ce460762fca278195082bc36b5c6084bec499e7d0eb3e37cdc18d1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nlnttbaaghooykpwgdpnpvvdc.ijq
        • Path C:\Program Files (x86)\nlnttbaaghooykpwgdpnpvvdc.ijq
        • Size 272B
        • SHA256 0fbc1469b9260ec81ebd798b2354fff8730947746680ed719d76646aab884318
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nlnttbaaghooykpwgdpnpvvdc.ijq
        • Path C:\Program Files (x86)\nlnttbaaghooykpwgdpnpvvdc.ijq
        • Size 272B
        • SHA256 9e86e37eaf9b80e965b2ae3a552c4d9a58a584da3899909745d419e16e055d0a
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ddhpr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ddhpr.exe
        • Size 716KB
        • SHA256 b7fc15e9b3e6557c061190201b94e9fea2f28b69f97c0e237d68e7d382db41ad
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        sasmzoglckc.exe
        • Path C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
        • Size 320KB
        • SHA256 c8c542ac3f6526d1501c2b9d6262bfa029a1ac0d9dd6b3c1965977abdd8bd126
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nlnttbaaghooykpwgdpnpvvdc.ijq
        • Path C:\Users\Admin\AppData\Local\nlnttbaaghooykpwgdpnpvvdc.ijq
        • Size 272B
        • SHA256 32d86c5eb40897f897cfec1dd27f022d70e5a9169a03628ba5213f0ebcac0c74
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sbofqjtevhzkfcskfnktgxiblwnzrcxukcxf.lyp
        • Path C:\Users\Admin\AppData\Local\sbofqjtevhzkfcskfnktgxiblwnzrcxukcxf.lyp
        • Size 3KB
        • SHA256 27c95fdebeab4008f201e092603659860121c387c8114d56a1c35304c9cce11c
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qdupebpezplazauqpb.exe
        • Path C:\Windows\SysWOW64\qdupebpezplazauqpb.exe
        • Size 504KB
        • SHA256 5cfbb752301e333149e30a0c824012b94531d8af2c42bbec55c3a0233b19c916
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vblzhxemajy.bat
        • Path C:\vblzhxemajy.bat
        • Size 652KB
        • SHA256 223f333f8868531c511f4aba0cac83447c0575b5e45c2ae1dd014f5abe35c389
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download