Overview

overview

10

Static

static

3

tmpfr7sguo8.exe

windows10-ltsc_2021-x64

10

tmpfr7sguo8.exe

windows10-2004-x64

10

tmpfr7sguo8.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, 14:05

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General

  • Target
    tmpfr7sguo8.exe
  • Size 492KB
  • Sample260522-rd99hsds8j
  • SHA256 96641994ddd560ee2433fe91c84b389b54d72af8ec6170f84445ad5c5a747be4
  • 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 37 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\tmpfr7sguo8.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpfr7sguo8.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2784
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\users\admin\appdata\local\temp\tmpfr7sguo8.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:2732
      • C:\Users\Admin\AppData\Local\Temp\vclmx.exe
        "C:\Users\Admin\AppData\Local\Temp\vclmx.exe" "-C:\Users\Admin\AppData\Local\Temp\skeqmakdqjwpsmkx.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:236
      • C:\Users\Admin\AppData\Local\Temp\vclmx.exe
        "C:\Users\Admin\AppData\Local\Temp\vclmx.exe" "-C:\Users\Admin\AppData\Local\Temp\skeqmakdqjwpsmkx.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:4460
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\users\admin\appdata\local\temp\tmpfr7sguo8.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:5052
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2696
  • C:\Windows\gcaqqiwtkhyvcactgccy.exe
    gcaqqiwtkhyvcactgccy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2212
  • C:\Users\Admin\AppData\Local\Temp\zsnaxmxrfznhlgftd.exe
    C:\Users\Admin\AppData\Local\Temp\zsnaxmxrfznhlgftd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3000
  • C:\Windows\skeqmakdqjwpsmkx.exe
    skeqmakdqjwpsmkx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\skeqmakdqjwpsmkx.exe*."
      2⤵
      • Executes dropped EXE
      PID:2448
  • C:\Users\Admin\AppData\Local\Temp\tolazqdzplbxdabrdyx.exe
    C:\Users\Admin\AppData\Local\Temp\tolazqdzplbxdabrdyx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3772
  • C:\Windows\tolazqdzplbxdabrdyx.exe
    tolazqdzplbxdabrdyx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2304
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\tolazqdzplbxdabrdyx.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:2052
  • C:\Windows\zsnaxmxrfznhlgftd.exe
    zsnaxmxrfznhlgftd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5028
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\zsnaxmxrfznhlgftd.exe*."
      2⤵
      • Executes dropped EXE
      PID:3968
  • C:\Windows\tolazqdzplbxdabrdyx.exe
    tolazqdzplbxdabrdyx.exe
    1⤵
    • Executes dropped EXE
    PID:2168
  • C:\Windows\gcaqqiwtkhyvcactgccy.exe
    gcaqqiwtkhyvcactgccy.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3284
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\gcaqqiwtkhyvcactgccy.exe*."
      2⤵
      • Executes dropped EXE
      PID:5112
  • C:\Windows\skeqmakdqjwpsmkx.exe
    skeqmakdqjwpsmkx.exe
    1⤵
    • Executes dropped EXE
    PID:3248
  • C:\Windows\icymkamhwrgbgccrcw.exe
    icymkamhwrgbgccrcw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2856
  • C:\Users\Admin\AppData\Local\Temp\gcaqqiwtkhyvcactgccy.exe
    C:\Users\Admin\AppData\Local\Temp\gcaqqiwtkhyvcactgccy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3812
  • C:\Windows\icymkamhwrgbgccrcw.exe
    icymkamhwrgbgccrcw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1288
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\icymkamhwrgbgccrcw.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:3756
  • C:\Users\Admin\AppData\Local\Temp\skeqmakdqjwpsmkx.exe
    C:\Users\Admin\AppData\Local\Temp\skeqmakdqjwpsmkx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2448
  • C:\Windows\zsnaxmxrfznhlgftd.exe
    zsnaxmxrfznhlgftd.exe
    1⤵
    • Executes dropped EXE
    PID:1620
  • C:\Users\Admin\AppData\Local\Temp\icymkamhwrgbgccrcw.exe
    C:\Users\Admin\AppData\Local\Temp\icymkamhwrgbgccrcw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4352
  • C:\Windows\vsrijcrphfxvdcfxlijgf.exe
    vsrijcrphfxvdcfxlijgf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3472
  • C:\Windows\vsrijcrphfxvdcfxlijgf.exe
    vsrijcrphfxvdcfxlijgf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4556
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\vsrijcrphfxvdcfxlijgf.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:908
  • C:\Users\Admin\AppData\Local\Temp\vsrijcrphfxvdcfxlijgf.exe
    C:\Users\Admin\AppData\Local\Temp\vsrijcrphfxvdcfxlijgf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3564

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

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        Downloads

        fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Path C:\Program Files (x86)\fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Size 272B
        • SHA256 0f537beaca6d597bbffdef30d562b971178e5617f779469b71932be8ed4f5826
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Path C:\Program Files (x86)\fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Size 272B
        • SHA256 86fbb7d632b1d7456fc8ea7d65e25feb5b91a74867fb49e6256db31fcb6a6f0d
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Path C:\Program Files (x86)\fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Size 272B
        • SHA256 2e4d2135d4c7be01ccb96c1de7b18d51ad096b41457d1a107436aca51882b47a
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Path C:\Program Files (x86)\fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Size 272B
        • SHA256 e4a64cf7bc297a5c3ed68061d492c10ddb64d7aafb284b3e31c65fdf11d13239
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Path C:\Program Files (x86)\fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Size 272B
        • SHA256 f25cf6ebf50cabc5583432f0561755aa023c490e46c9b1eadf9041757bea74e6
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nbzohptgxlj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
        • Size 320KB
        • SHA256 1849989ee704cda3b552b5021f3165012978d26d0daf7d22a09805deb6be2d0b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vclmx.exe
        • Path C:\Users\Admin\AppData\Local\Temp\vclmx.exe
        • Size 708KB
        • SHA256 777ab83d0651964e59888dd56017c3335eebc7f29f1a1cd92bce45406d567cdd
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Path C:\Users\Admin\AppData\Local\fkrqzaxddjjpfmxxtyhmtsbcz.fll
        • Size 272B
        • SHA256 c57c10c21de03e2fd3b12a493b1927d34cef13082872db784aa3d4780d6ab134
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        kascwiqhsjulmealsicskuoaizkbmdewsdka.kcm
        • Path C:\Users\Admin\AppData\Local\kascwiqhsjulmealsicskuoaizkbmdewsdka.kcm
        • Size 3KB
        • SHA256 ba1124c0c8a8a010ecde7fd2a2293c702a277b7db59cb3a4c0a0621ecd7ff394
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        icymkamhwrgbgccrcw.exe
        • Path C:\Windows\SysWOW64\icymkamhwrgbgccrcw.exe
        • Size 492KB
        • SHA256 96641994ddd560ee2433fe91c84b389b54d72af8ec6170f84445ad5c5a747be4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download