Overview

overview

10

Static

static

3

tmp5tchldjm.exe

windows10-ltsc_2021-x64

10

tmp5tchldjm.exe

windows10-2004-x64

10

tmp5tchldjm.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • 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, 02:41

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General

  • Target
    tmp5tchldjm.exe
  • Size 552KB
  • Sample260602-c6ewrab16z
  • SHA256 a4f34c295e6c3b23b5681996bf6bb7e1fa0d4f33cd3f04050e27f54f7fb9365b
  • 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 34 IoCs
    persistence
  • Disables RegEdit via registry modification 9 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 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 9 IoCs
  • System policy modification 1 TTPs 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp5tchldjm.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp5tchldjm.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4720
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\users\admin\appdata\local\temp\tmp5tchldjm.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:60
      • C:\Users\Admin\AppData\Local\Temp\aafrp.exe
        "C:\Users\Admin\AppData\Local\Temp\aafrp.exe" "-c:\users\admin\appdata\local\temp\tmp5tchldjm.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:2804
      • C:\Users\Admin\AppData\Local\Temp\aafrp.exe
        "C:\Users\Admin\AppData\Local\Temp\aafrp.exe" "-c:\users\admin\appdata\local\temp\tmp5tchldjm.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:4592
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\users\admin\appdata\local\temp\tmp5tchldjm.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:3436
  • C:\Windows\ymffrqhaqkrqeaobrzc.exe
    ymffrqhaqkrqeaobrzc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2024
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\ymffrqhaqkrqeaobrzc.exe*."
      2⤵
      • Executes dropped EXE
      PID:5044
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3204
  • C:\Windows\lauviiaulgoodapdudhw.exe
    lauviiaulgoodapdudhw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4140
  • C:\Users\Admin\AppData\Local\Temp\eqhfpmbsgydamgsdr.exe
    C:\Users\Admin\AppData\Local\Temp\eqhfpmbsgydamgsdr.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:404
  • C:\Windows\xiyveaoerimitmxh.exe
    xiyveaoerimitmxh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2904
  • C:\Windows\eqhfpmbsgydamgsdr.exe
    eqhfpmbsgydamgsdr.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3844
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\eqhfpmbsgydamgsdr.exe*."
      2⤵
      • Executes dropped EXE
      PID:1936
  • C:\Users\Admin\AppData\Local\Temp\nasrcaqixqwuhcpbqx.exe
    C:\Users\Admin\AppData\Local\Temp\nasrcaqixqwuhcpbqx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4532
  • C:\Windows\eqhfpmbsgydamgsdr.exe
    eqhfpmbsgydamgsdr.exe
    1⤵
    • Executes dropped EXE
    PID:2696
  • C:\Users\Admin\AppData\Local\Temp\xiyveaoerimitmxh.exe
    C:\Users\Admin\AppData\Local\Temp\xiyveaoerimitmxh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1696
  • C:\Windows\xiyveaoerimitmxh.exe
    xiyveaoerimitmxh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3728
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\xiyveaoerimitmxh.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:1056
  • C:\Windows\ymffrqhaqkrqeaobrzc.exe
    ymffrqhaqkrqeaobrzc.exe
    1⤵
    • Executes dropped EXE
    PID:2176
  • C:\Windows\lauviiaulgoodapdudhw.exe
    lauviiaulgoodapdudhw.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2952
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\lauviiaulgoodapdudhw.exe*."
      2⤵
      • Executes dropped EXE
      PID:1400
  • C:\Users\Admin\AppData\Local\Temp\aqlnbcvqienoecshzjoez.exe
    C:\Users\Admin\AppData\Local\Temp\aqlnbcvqienoecshzjoez.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:964
  • C:\Windows\nasrcaqixqwuhcpbqx.exe
    nasrcaqixqwuhcpbqx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4480
  • C:\Windows\aqlnbcvqienoecshzjoez.exe
    aqlnbcvqienoecshzjoez.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:820
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\aqlnbcvqienoecshzjoez.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:512
  • C:\Users\Admin\AppData\Local\Temp\ymffrqhaqkrqeaobrzc.exe
    C:\Users\Admin\AppData\Local\Temp\ymffrqhaqkrqeaobrzc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4544
  • C:\Windows\nasrcaqixqwuhcpbqx.exe
    nasrcaqixqwuhcpbqx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:776
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\nasrcaqixqwuhcpbqx.exe*."
      2⤵
      • Executes dropped EXE
      PID:4664
  • C:\Windows\aqlnbcvqienoecshzjoez.exe
    aqlnbcvqienoecshzjoez.exe
    1⤵
    • Executes dropped EXE
    PID:1656
  • C:\Users\Admin\AppData\Local\Temp\lauviiaulgoodapdudhw.exe
    C:\Users\Admin\AppData\Local\Temp\lauviiaulgoodapdudhw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4732

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

        fceniqqsrukspurnmdpmoxsa.cbe
        • Path C:\Program Files (x86)\fceniqqsrukspurnmdpmoxsa.cbe
        • Size 272B
        • SHA256 bf1bf66193371df68720739417b14169f2c2bbc83ed5a79567669149eaf769fb
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fceniqqsrukspurnmdpmoxsa.cbe
        • Path C:\Program Files (x86)\fceniqqsrukspurnmdpmoxsa.cbe
        • Size 272B
        • SHA256 9a3f43c147ddd1ceaa16a70f4ca3828e487058255980076b79f6239e8873262e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        aafrp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\aafrp.exe
        • Size 700KB
        • SHA256 3925208e1d23a6f86841209edb0500dcfa532ec2ac9e33af5da210038a3c3339
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        duaouzhhnek.exe
        • Path C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
        • Size 320KB
        • SHA256 c4b122f7bab30363b472a3dffb8a7c61604c0ec4719ebd233ccbac8be0951be1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        fceniqqsrukspurnmdpmoxsa.cbe
        • Path C:\Users\Admin\AppData\Local\fceniqqsrukspurnmdpmoxsa.cbe
        • Size 272B
        • SHA256 a7f0e45b75a0859433d2caa6cd79da85edf527868058e1e37a832398de289d52
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        owjdjcnakyzsaqyfprowjdjcnakyzsaqyfp.owj
        • Path C:\Users\Admin\AppData\Local\owjdjcnakyzsaqyfprowjdjcnakyzsaqyfp.owj
        • Size 3KB
        • SHA256 3839655a5dd561dc586ade309b476129b770801677cb6bac559c0c35845f1f3b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nasrcaqixqwuhcpbqx.exe
        • Path C:\Windows\SysWOW64\nasrcaqixqwuhcpbqx.exe
        • Size 552KB
        • SHA256 a4f34c295e6c3b23b5681996bf6bb7e1fa0d4f33cd3f04050e27f54f7fb9365b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download