Overview

overview

10

Static

static

3

tmpsakqm7q4.exe

windows10-ltsc_2021-x64

10

tmpsakqm7q4.exe

windows10-2004-x64

10

tmpsakqm7q4.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
    02/06/2026, 03:21

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General

  • Target
    tmpsakqm7q4.exe
  • Size 556KB
  • Sample260602-dwmpaad16m
  • SHA256 4a5dc0a8527388a5a96838556e49988c8e40a511e2f8ac3b19fd7db7fecfc92c
  • 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
  • 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 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\tmpsakqm7q4.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpsakqm7q4.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1036
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\users\admin\appdata\local\temp\tmpsakqm7q4.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:4568
      • C:\Users\Admin\AppData\Local\Temp\dffnu.exe
        "C:\Users\Admin\AppData\Local\Temp\dffnu.exe" "-C:\Users\Admin\AppData\Local\Temp\anyrjykjqhyuctmc.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:1128
      • C:\Users\Admin\AppData\Local\Temp\dffnu.exe
        "C:\Users\Admin\AppData\Local\Temp\dffnu.exe" "-C:\Users\Admin\AppData\Local\Temp\anyrjykjqhyuctmc.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:3248
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\users\admin\appdata\local\temp\tmpsakqm7q4.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:2208
  • C:\Windows\anyrjykjqhyuctmc.exe
    anyrjykjqhyuctmc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1220
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\anyrjykjqhyuctmc.exe*."
      2⤵
      • Executes dropped EXE
      PID:1160
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4512
  • C:\Windows\dvljgarvhdzanjhcrerjz.exe
    dvljgarvhdzanjhcrerjz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4256
  • C:\Users\Admin\AppData\Local\Temp\dvljgarvhdzanjhcrerjz.exe
    C:\Users\Admin\AppData\Local\Temp\dvljgarvhdzanjhcrerjz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1108
  • C:\Windows\dvljgarvhdzanjhcrerjz.exe
    dvljgarvhdzanjhcrerjz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3208
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\dvljgarvhdzanjhcrerjz.exe*."
      2⤵
      • Executes dropped EXE
      PID:2360
  • C:\Windows\ofurngwzkfaamheymykb.exe
    ofurngwzkfaamheymykb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3540
  • C:\Users\Admin\AppData\Local\Temp\qfsnhymnwpigqjewis.exe
    C:\Users\Admin\AppData\Local\Temp\qfsnhymnwpigqjewis.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1652
  • C:\Windows\brfbwodfpjdcnhdwjuf.exe
    brfbwodfpjdcnhdwjuf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1484
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\brfbwodfpjdcnhdwjuf.exe*."
      2⤵
      • Executes dropped EXE
      PID:1764
  • C:\Windows\hvhbukxxfxpmvnhyj.exe
    hvhbukxxfxpmvnhyj.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:696
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\hvhbukxxfxpmvnhyj.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:3776
  • C:\Windows\qfsnhymnwpigqjewis.exe
    qfsnhymnwpigqjewis.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:948
  • C:\Users\Admin\AppData\Local\Temp\anyrjykjqhyuctmc.exe
    C:\Users\Admin\AppData\Local\Temp\anyrjykjqhyuctmc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4212
  • C:\Users\Admin\AppData\Local\Temp\hvhbukxxfxpmvnhyj.exe
    C:\Users\Admin\AppData\Local\Temp\hvhbukxxfxpmvnhyj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4648
  • C:\Windows\hvhbukxxfxpmvnhyj.exe
    hvhbukxxfxpmvnhyj.exe
    1⤵
    • Executes dropped EXE
    PID:2196
  • C:\Windows\anyrjykjqhyuctmc.exe
    anyrjykjqhyuctmc.exe
    1⤵
    • Executes dropped EXE
    PID:1656
  • C:\Windows\ofurngwzkfaamheymykb.exe
    ofurngwzkfaamheymykb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\ofurngwzkfaamheymykb.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:1264
  • C:\Users\Admin\AppData\Local\Temp\brfbwodfpjdcnhdwjuf.exe
    C:\Users\Admin\AppData\Local\Temp\brfbwodfpjdcnhdwjuf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1848
  • C:\Windows\brfbwodfpjdcnhdwjuf.exe
    brfbwodfpjdcnhdwjuf.exe
    1⤵
    • Executes dropped EXE
    PID:4128
  • C:\Users\Admin\AppData\Local\Temp\ofurngwzkfaamheymykb.exe
    C:\Users\Admin\AppData\Local\Temp\ofurngwzkfaamheymykb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4424
  • C:\Windows\qfsnhymnwpigqjewis.exe
    qfsnhymnwpigqjewis.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4012
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\qfsnhymnwpigqjewis.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:1576

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

        ebwzbawfwxyewxaaumebwz.awf
        • Path C:\Program Files (x86)\ebwzbawfwxyewxaaumebwz.awf
        • Size 272B
        • SHA256 a7c5f4ef862d72c241794f727136ce4e1bcbd041a84c60ebcf875218efc9a517
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ebwzbawfwxyewxaaumebwz.awf
        • Path C:\Program Files (x86)\ebwzbawfwxyewxaaumebwz.awf
        • Size 272B
        • SHA256 40a2d20268fd408c8757f94f580860219b5bdd4c15b19ca56c8c2180b967bf70
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        dffnu.exe
        • Path C:\Users\Admin\AppData\Local\Temp\dffnu.exe
        • Size 724KB
        • SHA256 b7afa89ba0376144cc182979ba3a90e14df2b01250051ffae49cc0ffab394c42
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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

        ebwzbawfwxyewxaaumebwz.awf
        • Path C:\Users\Admin\AppData\Local\ebwzbawfwxyewxaaumebwz.awf
        • Size 272B
        • SHA256 592eb65b0f76729f5ecf9fe872efbe3e654c148128f5dfbf5eb66efe2d45b5ea
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ebwzbawfwxyewxaaumebwz.awf
        • Path C:\Users\Admin\AppData\Local\ebwzbawfwxyewxaaumebwz.awf
        • Size 272B
        • SHA256 81cb5c4891d41aba4e996caa7bde425d756552f2ef2c666d945e81dcbe6cee36
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        vdjxkubvxjvmpbpafiltznakrlnzlcfrf.vyb
        • Path C:\Users\Admin\AppData\Local\vdjxkubvxjvmpbpafiltznakrlnzlcfrf.vyb
        • Size 3KB
        • SHA256 63adfc0d37658870e93602ee3974f76d5422b9930ee404b4623a0b41773f172b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qfsnhymnwpigqjewis.exe
        • Path C:\Windows\SysWOW64\qfsnhymnwpigqjewis.exe
        • Size 556KB
        • SHA256 4a5dc0a8527388a5a96838556e49988c8e40a511e2f8ac3b19fd7db7fecfc92c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download