Overview

overview

10

Static

static

3

tmp7f238q66.exe

windows10-ltsc_2021-x64

10

tmp7f238q66.exe

windows10-2004-x64

10

tmp7f238q66.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/06/2026, 02:48

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General

  • Target
    tmp7f238q66.exe
  • Size 524KB
  • Sample260602-dahs7sdv9m
  • SHA256 c4c741a11beb96f4c28deda40b4b246a350a83e0bd91ab6e09e5b59fcba51a39
  • 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 37 IoCs
    persistence
  • Disables RegEdit via registry modification 6 IoCs
    defense_evasion
  • Checks computer location settings 2 TTPs 8 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 7 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 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\tmp7f238q66.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp7f238q66.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1684
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\users\admin\appdata\local\temp\tmp7f238q66.exe*"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Checks computer location settings
      • 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:4172
      • C:\Users\Admin\AppData\Local\Temp\pntais.exe
        "C:\Users\Admin\AppData\Local\Temp\pntais.exe" "-C:\Users\Admin\AppData\Local\Temp\bjzqicmcthsanblm.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:4208
      • C:\Users\Admin\AppData\Local\Temp\pntais.exe
        "C:\Users\Admin\AppData\Local\Temp\pntais.exe" "-C:\Users\Admin\AppData\Local\Temp\bjzqicmcthsanblm.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:2504
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\users\admin\appdata\local\temp\tmp7f238q66.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:1976
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2020
  • C:\Windows\iriatozqixjsgvgii.exe
    iriatozqixjsgvgii.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3824
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\iriatozqixjsgvgii.exe*."
      2⤵
      • Executes dropped EXE
      PID:4796
  • C:\Windows\cngavsfysjxiypcgiqg.exe
    cngavsfysjxiypcgiqg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3460
  • C:\Windows\ermifetokdtgyrgmqasfa.exe
    ermifetokdtgyrgmqasfa.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:972
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\ermifetokdtgyrgmqasfa.exe*."
      2⤵
      • Executes dropped EXE
      PID:2712
  • C:\Users\Admin\AppData\Local\Temp\iriatozqixjsgvgii.exe
    C:\Users\Admin\AppData\Local\Temp\iriatozqixjsgvgii.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4512
  • C:\Users\Admin\AppData\Local\Temp\cngavsfysjxiypcgiqg.exe
    C:\Users\Admin\AppData\Local\Temp\cngavsfysjxiypcgiqg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3372
  • C:\Users\Admin\AppData\Local\Temp\ermifetokdtgyrgmqasfa.exe
    C:\Users\Admin\AppData\Local\Temp\ermifetokdtgyrgmqasfa.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2020
  • C:\Windows\rbtmgcogzpcmbrdgho.exe
    rbtmgcogzpcmbrdgho.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:636
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\rbtmgcogzpcmbrdgho.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:3472
  • C:\Users\Admin\AppData\Local\Temp\rbtmgcogzpcmbrdgho.exe
    C:\Users\Admin\AppData\Local\Temp\rbtmgcogzpcmbrdgho.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2580
  • C:\Windows\bjzqicmcthsanblm.exe
    bjzqicmcthsanblm.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2764
  • C:\Windows\pbvqmkysnfugxpdilulx.exe
    pbvqmkysnfugxpdilulx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5064
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\pbvqmkysnfugxpdilulx.exe*."
      2⤵
      • Executes dropped EXE
      PID:4436
  • C:\Windows\pbvqmkysnfugxpdilulx.exe
    pbvqmkysnfugxpdilulx.exe
    1⤵
    • Executes dropped EXE
    PID:5008
  • C:\Users\Admin\AppData\Local\Temp\bjzqicmcthsanblm.exe
    C:\Users\Admin\AppData\Local\Temp\bjzqicmcthsanblm.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4552
  • C:\Windows\rbtmgcogzpcmbrdgho.exe
    rbtmgcogzpcmbrdgho.exe
    1⤵
    • Executes dropped EXE
    PID:1896
  • C:\Users\Admin\AppData\Local\Temp\pbvqmkysnfugxpdilulx.exe
    C:\Users\Admin\AppData\Local\Temp\pbvqmkysnfugxpdilulx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3308
  • C:\Windows\iriatozqixjsgvgii.exe
    iriatozqixjsgvgii.exe
    1⤵
    • Executes dropped EXE
    PID:456
  • C:\Windows\ermifetokdtgyrgmqasfa.exe
    ermifetokdtgyrgmqasfa.exe
    1⤵
    • Executes dropped EXE
    PID:1044
  • C:\Windows\bjzqicmcthsanblm.exe
    bjzqicmcthsanblm.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3456
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\bjzqicmcthsanblm.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:4344
  • C:\Windows\cngavsfysjxiypcgiqg.exe
    cngavsfysjxiypcgiqg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2752
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\cngavsfysjxiypcgiqg.exe*."
      2⤵
      • Executes dropped EXE
      PID:4644

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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        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

        jmudieyytwe.exe
        • Path C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
        • Size 320KB
        • SHA256 b6cb47966f47fc97941c732df430ba6a8c53a0e4a5a771650d7a4e0fe76d77b7
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        pntais.exe
        • Path C:\Users\Admin\AppData\Local\Temp\pntais.exe
        • Size 720KB
        • SHA256 7d62a0faf40b84260d5d7f4043c17ab91562aeb08c14645628f22d95f08ed70e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        gzacfkfgihdwutoakayrsux.xya
        • Path C:\Users\Admin\AppData\Local\gzacfkfgihdwutoakayrsux.xya
        • Size 280B
        • SHA256 dd2f973021097c99f53f5f8b46bd45663124353569565e133abf71757241461d
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        txjwkagsfpwajtzwrsbfresioanxeirbhe.ajn
        • Path C:\Users\Admin\AppData\Local\txjwkagsfpwajtzwrsbfresioanxeirbhe.ajn
        • Size 4KB
        • SHA256 27dcbd7b456b31f671021d90f1af254edbb44640b2dcb780915c54794f668efe
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        rbtmgcogzpcmbrdgho.exe
        • Path C:\Windows\SysWOW64\rbtmgcogzpcmbrdgho.exe
        • Size 524KB
        • SHA256 c4c741a11beb96f4c28deda40b4b246a350a83e0bd91ab6e09e5b59fcba51a39
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download