Overview

overview

10

Static

static

3

tmpelii_59x.exe

windows10-ltsc_2021-x64

10

tmpelii_59x.exe

windows10-2004-x64

10

tmpelii_59x.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    159s
  • 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, 15:03

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General

  • Target
    tmpelii_59x.exe
  • Size 1020KB
  • Sample260522-se4c2aez3m
  • SHA256 52ea5ce70986e3d6451f7bcf724216e2dbc95bf44f0264df2517b8cb39f946c7
  • 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 31 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 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 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 40 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpelii_59x.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpelii_59x.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4868
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\users\admin\appdata\local\temp\tmpelii_59x.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:1540
      • C:\Users\Admin\AppData\Local\Temp\bfnsy.exe
        "C:\Users\Admin\AppData\Local\Temp\bfnsy.exe" "-C:\Users\Admin\AppData\Local\Temp\yngwndtftlyvumgd.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:4500
      • C:\Users\Admin\AppData\Local\Temp\bfnsy.exe
        "C:\Users\Admin\AppData\Local\Temp\bfnsy.exe" "-C:\Users\Admin\AppData\Local\Temp\yngwndtftlyvumgd.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:4088
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\users\admin\appdata\local\temp\tmpelii_59x.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:5768
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:6076
  • C:\Windows\bvtokfarkhzbfcbdsuomh.exe
    bvtokfarkhzbfcbdsuomh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1228
  • C:\Windows\bvtokfarkhzbfcbdsuomh.exe
    bvtokfarkhzbfcbdsuomh.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\bvtokfarkhzbfcbdsuomh.exe*."
      2⤵
      • Executes dropped EXE
      PID:1140
  • C:\Windows\fvpgypgtibpnngbzk.exe
    fvpgypgtibpnngbzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3880
  • C:\Users\Admin\AppData\Local\Temp\zrngatmbsnddfaxxkkc.exe
    C:\Users\Admin\AppData\Local\Temp\zrngatmbsnddfaxxkkc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1084
  • C:\Windows\yngwndtftlyvumgd.exe
    yngwndtftlyvumgd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5624
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\yngwndtftlyvumgd.exe*."
      2⤵
      • Executes dropped EXE
      PID:5300
  • C:\Users\Admin\AppData\Local\Temp\fvpgypgtibpnngbzk.exe
    C:\Users\Admin\AppData\Local\Temp\fvpgypgtibpnngbzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4104
  • C:\Users\Admin\AppData\Local\Temp\mfcwrlfvnjabeayznohe.exe
    C:\Users\Admin\AppData\Local\Temp\mfcwrlfvnjabeayznohe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1548
  • C:\Windows\mfcwrlfvnjabeayznohe.exe
    mfcwrlfvnjabeayznohe.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2148
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\mfcwrlfvnjabeayznohe.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:220
  • C:\Windows\mfcwrlfvnjabeayznohe.exe
    mfcwrlfvnjabeayznohe.exe
    1⤵
    • Executes dropped EXE
    PID:5420
  • C:\Windows\zrngatmbsnddfaxxkkc.exe
    zrngatmbsnddfaxxkkc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5836
  • C:\Windows\fvpgypgtibpnngbzk.exe
    fvpgypgtibpnngbzk.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1448
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\fvpgypgtibpnngbzk.exe*."
      2⤵
      • Executes dropped EXE
      PID:6000
  • C:\Windows\ofasldvjztihicyxji.exe
    ofasldvjztihicyxji.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5168
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\ofasldvjztihicyxji.exe*."
      2⤵
      • Executes dropped EXE
      PID:4660
  • C:\Users\Admin\AppData\Local\Temp\yngwndtftlyvumgd.exe
    C:\Users\Admin\AppData\Local\Temp\yngwndtftlyvumgd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2820
  • C:\Windows\ofasldvjztihicyxji.exe
    ofasldvjztihicyxji.exe
    1⤵
    • Executes dropped EXE
    PID:6012
  • C:\Windows\zrngatmbsnddfaxxkkc.exe
    zrngatmbsnddfaxxkkc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5656
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\zrngatmbsnddfaxxkkc.exe*."
      2⤵
      • Executes dropped EXE
      PID:736
  • C:\Windows\yngwndtftlyvumgd.exe
    yngwndtftlyvumgd.exe
    1⤵
    • Executes dropped EXE
    PID:4400
  • C:\Users\Admin\AppData\Local\Temp\ofasldvjztihicyxji.exe
    C:\Users\Admin\AppData\Local\Temp\ofasldvjztihicyxji.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4984
  • C:\Users\Admin\AppData\Local\Temp\bvtokfarkhzbfcbdsuomh.exe
    C:\Users\Admin\AppData\Local\Temp\bvtokfarkhzbfcbdsuomh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5940

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

        bfnsy.exe
        • Path C:\Users\Admin\AppData\Local\Temp\bfnsy.exe
        • Size 728KB
        • SHA256 cf8a089687b6593b59c075232fb50478c044b50181726438226aa7195369e208
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        sasmzoglckc.exe
        • Path C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
        • Size 320KB
        • SHA256 6194dcf9d99e1ba589a2995790f160b415a8d453d9ca67b023832e5e8002ef06
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ghmortvttxwfquajfopuwzbd.bfe
        • Path C:\Users\Admin\AppData\Local\ghmortvttxwfquajfopuwzbd.bfe
        • Size 280B
        • SHA256 1dc69e45cf1a5a90dedfcb29f712beb32d28bd88159dde313aff28483c1854d6
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        pbresfsbmblfbqhbicoerfsfozoysoduovp.res
        • Path C:\Users\Admin\AppData\Local\pbresfsbmblfbqhbicoerfsfozoysoduovp.res
        • Size 4KB
        • SHA256 3ababf93eb4797272968c4c862f4d560ee0f58c675caf1949c60c20d93c52afe
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ofasldvjztihicyxji.exe
        • Path C:\Windows\SysWOW64\ofasldvjztihicyxji.exe
        • Size 1020KB
        • SHA256 52ea5ce70986e3d6451f7bcf724216e2dbc95bf44f0264df2517b8cb39f946c7
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download