Overview

overview

10

Static

static

3

tmpjbiratrl.exe

windows10-ltsc_2021-x64

10

tmpjbiratrl.exe

windows10-2004-x64

10

tmpjbiratrl.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, 14:35

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General

  • Target
    tmpjbiratrl.exe
  • Size 1016KB
  • Sample260522-rxzbcsd16m
  • SHA256 38dd400b380fad264dcfce3a49e1e3bac252db96338e11d6c7e0d4d1e696b6f2
  • 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 36 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 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 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 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 10 IoCs
  • System policy modification 1 TTPs 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpjbiratrl.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpjbiratrl.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5480
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\users\admin\appdata\local\temp\tmpjbiratrl.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:4944
      • C:\Users\Admin\AppData\Local\Temp\psydlt.exe
        "C:\Users\Admin\AppData\Local\Temp\psydlt.exe" "-C:\Users\Admin\AppData\Local\Temp\boetldpjvjzhaohw.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:1516
      • C:\Users\Admin\AppData\Local\Temp\psydlt.exe
        "C:\Users\Admin\AppData\Local\Temp\psydlt.exe" "-C:\Users\Admin\AppData\Local\Temp\boetldpjvjzhaohw.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:1172
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\users\admin\appdata\local\temp\tmpjbiratrl.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:5952
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2088
  • C:\Windows\ewrlifwvmfanlecwneskf.exe
    ewrlifwvmfanlecwneskf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5988
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\ewrlifwvmfanlecwneskf.exe*."
      2⤵
      • Executes dropped EXE
      PID:1444
  • C:\Windows\ewrlifwvmfanlecwneskf.exe
    ewrlifwvmfanlecwneskf.exe
    1⤵
    • Executes dropped EXE
    PID:4524
  • C:\Windows\pgatplbzphbnkczsiylc.exe
    pgatplbzphbnkczsiylc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1512
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\pgatplbzphbnkczsiylc.exe*."
      2⤵
      • Executes dropped EXE
      PID:2592
  • C:\Windows\csldytifuleplcyqfug.exe
    csldytifuleplcyqfug.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1060
  • C:\Users\Admin\AppData\Local\Temp\pgatplbzphbnkczsiylc.exe
    C:\Users\Admin\AppData\Local\Temp\pgatplbzphbnkczsiylc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5868
  • C:\Users\Admin\AppData\Local\Temp\iwndwpcxkzqzticsf.exe
    C:\Users\Admin\AppData\Local\Temp\iwndwpcxkzqzticsf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2544
  • C:\Windows\csldytifuleplcyqfug.exe
    csldytifuleplcyqfug.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:396
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\csldytifuleplcyqfug.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:4964
  • C:\Users\Admin\AppData\Local\Temp\csldytifuleplcyqfug.exe
    C:\Users\Admin\AppData\Local\Temp\csldytifuleplcyqfug.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1568
  • C:\Windows\rgypjdrnbrjtoezqes.exe
    rgypjdrnbrjtoezqes.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4724
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\rgypjdrnbrjtoezqes.exe*."
      2⤵
      • Executes dropped EXE
      PID:5372
  • C:\Windows\rgypjdrnbrjtoezqes.exe
    rgypjdrnbrjtoezqes.exe
    1⤵
    • Executes dropped EXE
    PID:5624
  • C:\Windows\boetldpjvjzhaohw.exe
    boetldpjvjzhaohw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5656
  • C:\Users\Admin\AppData\Local\Temp\ewrlifwvmfanlecwneskf.exe
    C:\Users\Admin\AppData\Local\Temp\ewrlifwvmfanlecwneskf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5616
  • C:\Windows\boetldpjvjzhaohw.exe
    boetldpjvjzhaohw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5180
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\boetldpjvjzhaohw.exe*."
      2⤵
      • Executes dropped EXE
      PID:5000
  • C:\Windows\iwndwpcxkzqzticsf.exe
    iwndwpcxkzqzticsf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3348
  • C:\Windows\pgatplbzphbnkczsiylc.exe
    pgatplbzphbnkczsiylc.exe
    1⤵
    • Executes dropped EXE
    PID:5264
  • C:\Windows\iwndwpcxkzqzticsf.exe
    iwndwpcxkzqzticsf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:432
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\iwndwpcxkzqzticsf.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:2916
  • C:\Users\Admin\AppData\Local\Temp\rgypjdrnbrjtoezqes.exe
    C:\Users\Admin\AppData\Local\Temp\rgypjdrnbrjtoezqes.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4884
  • C:\Users\Admin\AppData\Local\Temp\boetldpjvjzhaohw.exe
    C:\Users\Admin\AppData\Local\Temp\boetldpjvjzhaohw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:948

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

        Loading Replay Monitor...

        Downloads

        gcbzabwzurqhjgigbwokj.ije
        • Path C:\Program Files (x86)\gcbzabwzurqhjgigbwokj.ije
        • Size 280B
        • SHA256 f8e233f5f8c92ad08a66e99f175e104031698db37c91d0ed4071ea6f72325f5c
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        gcbzabwzurqhjgigbwokj.ije
        • Path C:\Program Files (x86)\gcbzabwzurqhjgigbwokj.ije
        • Size 280B
        • SHA256 eebe5a28ce0c50996c40bbdf7333a0693cfeb7eaf0a62cd8a2849127acf002cf
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        gcbzabwzurqhjgigbwokj.ije
        • Path C:\Program Files (x86)\gcbzabwzurqhjgigbwokj.ije
        • Size 280B
        • SHA256 444723471c1b12bff7234631a33cabf18e6c6454fc8436b9ae923f12b4b5fa0b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        psydlt.exe
        • Path C:\Users\Admin\AppData\Local\Temp\psydlt.exe
        • Size 728KB
        • SHA256 c5fad1fc52de988fa9e7101986378980917cd4bf7e2da211f42c6ab34f4595f9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        qthqeovcadr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
        • Size 320KB
        • SHA256 0feb20bdd296f571b46599378a28789dd0e9334c2e6b9f78be099376cd994af8
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        bisbnzftzhrtgobkqwzgqzlxdrxfprem.iou
        • Path C:\Users\Admin\AppData\Local\bisbnzftzhrtgobkqwzgqzlxdrxfprem.iou
        • Size 4KB
        • SHA256 9f9490d963c42ba7c99d59e3ea8bf162765f3f5823785ee2de8bb573fc7859c0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        gcbzabwzurqhjgigbwokj.ije
        • Path C:\Users\Admin\AppData\Local\gcbzabwzurqhjgigbwokj.ije
        • Size 280B
        • SHA256 23966ff1619b985f35dc96e130063a165f825f985feca45ab39077e2e2d1eee5
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rgypjdrnbrjtoezqes.exe
        • Path C:\Windows\SysWOW64\rgypjdrnbrjtoezqes.exe
        • Size 1016KB
        • SHA256 38dd400b380fad264dcfce3a49e1e3bac252db96338e11d6c7e0d4d1e696b6f2
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download