Overview

overview

10

Static

static

3

tmpmyqvvmy6.exe

windows10-ltsc_2021-x64

10

tmpmyqvvmy6.exe

windows10-2004-x64

10

tmpmyqvvmy6.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, 03:58

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General

  • Target
    tmpmyqvvmy6.exe
  • Size 600KB
  • Sample260602-ejnw9adv4x
  • SHA256 fab208d4fde711f95e4da7fdfe3d7855f866bd2f367570aac74320952291faa1
  • 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 35 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 6 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpmyqvvmy6.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpmyqvvmy6.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5904
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\users\admin\appdata\local\temp\tmpmyqvvmy6.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:3372
      • C:\Users\Admin\AppData\Local\Temp\zdkudip.exe
        "C:\Users\Admin\AppData\Local\Temp\zdkudip.exe" "-C:\Users\Admin\AppData\Local\Temp\ylbumaqgridamcnp.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:5936
      • C:\Users\Admin\AppData\Local\Temp\zdkudip.exe
        "C:\Users\Admin\AppData\Local\Temp\zdkudip.exe" "-C:\Users\Admin\AppData\Local\Temp\ylbumaqgridamcnp.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:5484
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\users\admin\appdata\local\temp\tmpmyqvvmy6.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:468
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2492
  • C:\Windows\btomjcxsieegxsipcjphc.exe
    btomjcxsieegxsipcjphc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:588
  • C:\Windows\mdxuqicwlgfgwqflxdiz.exe
    mdxuqicwlgfgwqflxdiz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:6020
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\mdxuqicwlgfgwqflxdiz.exe*."
      2⤵
      • Executes dropped EXE
      PID:3756
  • C:\Users\Admin\AppData\Local\Temp\btomjcxsieegxsipcjphc.exe
    C:\Users\Admin\AppData\Local\Temp\btomjcxsieegxsipcjphc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2180
  • C:\Windows\ylbumaqgridamcnp.exe
    ylbumaqgridamcnp.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5296
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\ylbumaqgridamcnp.exe*."
      2⤵
      • Executes dropped EXE
      PID:2396
  • C:\Windows\zpiezqjcqkiixqejuzd.exe
    zpiezqjcqkiixqejuzd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3052
  • C:\Windows\odvqkaskxqnmasfjtx.exe
    odvqkaskxqnmasfjtx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2988
  • C:\Windows\zpiezqjcqkiixqejuzd.exe
    zpiezqjcqkiixqejuzd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4728
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\zpiezqjcqkiixqejuzd.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:1620
  • C:\Users\Admin\AppData\Local\Temp\mdxuqicwlgfgwqflxdiz.exe
    C:\Users\Admin\AppData\Local\Temp\mdxuqicwlgfgwqflxdiz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3036
  • C:\Windows\odvqkaskxqnmasfjtx.exe
    odvqkaskxqnmasfjtx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5236
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\odvqkaskxqnmasfjtx.exe*."
      2⤵
      • Executes dropped EXE
      PID:5916
  • C:\Windows\ftkexmdugyusfwilu.exe
    ftkexmdugyusfwilu.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:944
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\ftkexmdugyusfwilu.exe*."
      2⤵
      • Executes dropped EXE
      PID:4684
  • C:\Windows\ftkexmdugyusfwilu.exe
    ftkexmdugyusfwilu.exe
    1⤵
    • Executes dropped EXE
    PID:3856
  • C:\Users\Admin\AppData\Local\Temp\odvqkaskxqnmasfjtx.exe
    C:\Users\Admin\AppData\Local\Temp\odvqkaskxqnmasfjtx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1920
  • C:\Users\Admin\AppData\Local\Temp\zpiezqjcqkiixqejuzd.exe
    C:\Users\Admin\AppData\Local\Temp\zpiezqjcqkiixqejuzd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2784
  • C:\Users\Admin\AppData\Local\Temp\ftkexmdugyusfwilu.exe
    C:\Users\Admin\AppData\Local\Temp\ftkexmdugyusfwilu.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5812
  • C:\Windows\mdxuqicwlgfgwqflxdiz.exe
    mdxuqicwlgfgwqflxdiz.exe
    1⤵
    • Executes dropped EXE
    PID:4764
  • C:\Windows\btomjcxsieegxsipcjphc.exe
    btomjcxsieegxsipcjphc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4872
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\btomjcxsieegxsipcjphc.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:5900
  • C:\Users\Admin\AppData\Local\Temp\ylbumaqgridamcnp.exe
    C:\Users\Admin\AppData\Local\Temp\ylbumaqgridamcnp.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:788
  • C:\Windows\ylbumaqgridamcnp.exe
    ylbumaqgridamcnp.exe
    1⤵
    • Executes dropped EXE
    PID:3884

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

        dzyabyxwqquavuozqblhg.jgf
        • Path C:\Program Files (x86)\dzyabyxwqquavuozqblhg.jgf
        • Size 272B
        • SHA256 6ce087a9edfc9ea3eeaab0a71e3395e5bf2ab207016c3406c0d7a5edf7bd822a
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        dzyabyxwqquavuozqblhg.jgf
        • Path C:\Program Files (x86)\dzyabyxwqquavuozqblhg.jgf
        • Size 272B
        • SHA256 35b53d8127ba341a79b1a8ec6ed5785745338ca5b7c95039ace249a97c2117ac
        • MD5 SHA1 SHA512 TLSH
        Submit Download

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

        zdkudip.exe
        • Path C:\Users\Admin\AppData\Local\Temp\zdkudip.exe
        • Size 708KB
        • SHA256 17295208e2819e9a68231fadca3928c3602ec4bd334e75d58ac9fde936b51883
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dzyabyxwqquavuozqblhg.jgf
        • Path C:\Users\Admin\AppData\Local\dzyabyxwqquavuozqblhg.jgf
        • Size 272B
        • SHA256 f159a7144f4d8f1a8bb807415c4cc35c6b34f776ef38bac04d910a5018ae0ee1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        yfpcowgqvgvmschdfbwdnamueotetkqa.bdz
        • Path C:\Users\Admin\AppData\Local\yfpcowgqvgvmschdfbwdnamueotetkqa.bdz
        • Size 3KB
        • SHA256 b7728ef8f1c8379b25d5058656d77efa3ee89094b3f383cffa3e04e18f0372de
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        odvqkaskxqnmasfjtx.exe
        • Path C:\Windows\SysWOW64\odvqkaskxqnmasfjtx.exe
        • Size 600KB
        • SHA256 fab208d4fde711f95e4da7fdfe3d7855f866bd2f367570aac74320952291faa1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download