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
    154s
  • 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, 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 5 IoCs
    persistence
  • UAC bypass 3 TTPs 14 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 33 IoCs
    persistence
  • Disables RegEdit via registry modification 8 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 10 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 39 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 39 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 40 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp5tchldjm.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp5tchldjm.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1308
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.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
      • 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:3164
      • C:\Users\Admin\AppData\Local\Temp\ortbin.exe
        "C:\Users\Admin\AppData\Local\Temp\ortbin.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:2440
      • C:\Users\Admin\AppData\Local\Temp\ortbin.exe
        "C:\Users\Admin\AppData\Local\Temp\ortbin.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:4888
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.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:1160
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3428
  • C:\Windows\hvibtjyugxdnjnsyl.exe
    hvibtjyugxdnjnsyl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1600
  • C:\Users\Admin\AppData\Local\Temp\hvibtjyugxdnjnsyl.exe
    C:\Users\Admin\AppData\Local\Temp\hvibtjyugxdnjnsyl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:220
  • C:\Windows\anzrixlgrhmvqtxc.exe
    anzrixlgrhmvqtxc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:236
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\anzrixlgrhmvqtxc.exe*."
      2⤵
      • Executes dropped EXE
      PID:3732
  • C:\Windows\hvibtjyugxdnjnsyl.exe
    hvibtjyugxdnjnsyl.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:436
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\hvibtjyugxdnjnsyl.exe*."
      2⤵
      • Executes dropped EXE
      PID:1500
  • C:\Users\Admin\AppData\Local\Temp\dvmjfzssidnbbjsctrrja.exe
    C:\Users\Admin\AppData\Local\Temp\dvmjfzssidnbbjsctrrja.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:380
  • C:\Windows\anzrixlgrhmvqtxc.exe
    anzrixlgrhmvqtxc.exe
    1⤵
    • Executes dropped EXE
    PID:2388
  • C:\Windows\qftngxnkxpwhejpwkf.exe
    qftngxnkxpwhejpwkf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1668
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\qftngxnkxpwhejpwkf.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:3572
  • C:\Windows\brgbvnecqjrdbhowlhf.exe
    brgbvnecqjrdbhowlhf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1208
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\brgbvnecqjrdbhowlhf.exe*."
      2⤵
      • Executes dropped EXE
      PID:1572
  • C:\Users\Admin\AppData\Local\Temp\ofvrmfxwlfobahpyolkb.exe
    C:\Users\Admin\AppData\Local\Temp\ofvrmfxwlfobahpyolkb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1592
  • C:\Users\Admin\AppData\Local\Temp\anzrixlgrhmvqtxc.exe
    C:\Users\Admin\AppData\Local\Temp\anzrixlgrhmvqtxc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1304
  • C:\Windows\ofvrmfxwlfobahpyolkb.exe
    ofvrmfxwlfobahpyolkb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1180
  • C:\Windows\ofvrmfxwlfobahpyolkb.exe
    ofvrmfxwlfobahpyolkb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3080
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\ofvrmfxwlfobahpyolkb.exe*."
      2⤵
      • Executes dropped EXE
      PID:4428
  • C:\Users\Admin\AppData\Local\Temp\qftngxnkxpwhejpwkf.exe
    C:\Users\Admin\AppData\Local\Temp\qftngxnkxpwhejpwkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4524
  • C:\Users\Admin\AppData\Local\Temp\brgbvnecqjrdbhowlhf.exe
    C:\Users\Admin\AppData\Local\Temp\brgbvnecqjrdbhowlhf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:788
  • C:\Windows\dvmjfzssidnbbjsctrrja.exe
    dvmjfzssidnbbjsctrrja.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1076
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\dvmjfzssidnbbjsctrrja.exe*."
      2⤵
      • Executes dropped EXE
      PID:4512
  • C:\Windows\dvmjfzssidnbbjsctrrja.exe
    dvmjfzssidnbbjsctrrja.exe
    1⤵
    • Executes dropped EXE
    PID:4148
  • C:\Windows\qftngxnkxpwhejpwkf.exe
    qftngxnkxpwhejpwkf.exe
    1⤵
    • Executes dropped EXE
    PID:4584
  • C:\Windows\brgbvnecqjrdbhowlhf.exe
    brgbvnecqjrdbhowlhf.exe
    1⤵
    • Executes dropped EXE
    PID:2176

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

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

        ortbin.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ortbin.exe
        • Size 704KB
        • SHA256 8461676f1167f5b175e0107fe92b58fcceab76a4bc15538fe033bb2ae040ad03
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ahnzktbqvfehwtrqwjyflxirzotdcfur.ouh
        • Path C:\Users\Admin\AppData\Local\ahnzktbqvfehwtrqwjyflxirzotdcfur.ouh
        • Size 3KB
        • SHA256 635753f2b32e259829e798221e852f6fe0df228c4b20a27fa9d3477c8136bde5
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fbwxxvswqpdvzlymhjnje.fda
        • Path C:\Users\Admin\AppData\Local\fbwxxvswqpdvzlymhjnje.fda
        • Size 272B
        • SHA256 af2c545c6e754819c851b5f66134240e6969cb77fb8ffaf988a1768922cce6ad
        • MD5 SHA1 SHA512 TLSH
        Submit Download

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