Overview

overview

10

Static

static

3

tmpkg660511.exe

windows10-ltsc_2021-x64

10

tmpkg660511.exe

windows10-2004-x64

10

tmpkg660511.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, 03:37

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General

  • Target
    tmpkg660511.exe
  • Size 524KB
  • Sample260602-d61c5ac16x
  • SHA256 ce16cfb716ea2a3ebb272428883f5b7375f2b38c5eeff3c4e455baa9a9fb0168
  • 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 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 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\tmpkg660511.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpkg660511.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4084
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\users\admin\appdata\local\temp\tmpkg660511.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:3160
      • C:\Users\Admin\AppData\Local\Temp\xdfrr.exe
        "C:\Users\Admin\AppData\Local\Temp\xdfrr.exe" "-C:\Users\Admin\AppData\Local\Temp\ulyvgctfvhivznvz.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:2212
      • C:\Users\Admin\AppData\Local\Temp\xdfrr.exe
        "C:\Users\Admin\AppData\Local\Temp\xdfrr.exe" "-C:\Users\Admin\AppData\Local\Temp\ulyvgctfvhivznvz.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:4036
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\users\admin\appdata\local\temp\tmpkg660511.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:4592
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3568
  • C:\Windows\iduvkkfvpfkbjbnvewez.exe
    iduvkkfvpfkbjbnvewez.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1628
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\iduvkkfvpfkbjbnvewez.exe*."
      2⤵
      • Executes dropped EXE
      PID:4948
  • C:\Windows\kdsrecvjbpshndntaq.exe
    kdsrecvjbpshndntaq.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3780
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\kdsrecvjbpshndntaq.exe*."
      2⤵
      • Executes dropped EXE
      PID:640
  • C:\Windows\xtlndearmdjbkdqzjclhz.exe
    xtlndearmdjbkdqzjclhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1528
  • C:\Users\Admin\AppData\Local\Temp\xtlndearmdjbkdqzjclhz.exe
    C:\Users\Admin\AppData\Local\Temp\xtlndearmdjbkdqzjclhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3684
  • C:\Users\Admin\AppData\Local\Temp\vpfftsmbujndkbmtbsz.exe
    C:\Users\Admin\AppData\Local\Temp\vpfftsmbujndkbmtbsz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3300
  • C:\Windows\ulyvgctfvhivznvz.exe
    ulyvgctfvhivznvz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3124
  • C:\Windows\ulyvgctfvhivznvz.exe
    ulyvgctfvhivznvz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1284
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\ulyvgctfvhivznvz.exe*."
      2⤵
      • Executes dropped EXE
      PID:4980
  • C:\Windows\xtlndearmdjbkdqzjclhz.exe
    xtlndearmdjbkdqzjclhz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:380
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\xtlndearmdjbkdqzjclhz.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:4060
  • C:\Users\Admin\AppData\Local\Temp\iduvkkfvpfkbjbnvewez.exe
    C:\Users\Admin\AppData\Local\Temp\iduvkkfvpfkbjbnvewez.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2832
  • C:\Users\Admin\AppData\Local\Temp\ulyvgctfvhivznvz.exe
    C:\Users\Admin\AppData\Local\Temp\ulyvgctfvhivznvz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5056
  • C:\Windows\vpfftsmbujndkbmtbsz.exe
    vpfftsmbujndkbmtbsz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4516
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\vpfftsmbujndkbmtbsz.exe*."
      2⤵
      • Executes dropped EXE
      PID:760
  • C:\Windows\vpfftsmbujndkbmtbsz.exe
    vpfftsmbujndkbmtbsz.exe
    1⤵
    • Executes dropped EXE
    PID:3292
  • C:\Windows\iduvkkfvpfkbjbnvewez.exe
    iduvkkfvpfkbjbnvewez.exe
    1⤵
    • Executes dropped EXE
    PID:560
  • C:\Users\Admin\AppData\Local\Temp\kdsrecvjbpshndntaq.exe
    C:\Users\Admin\AppData\Local\Temp\kdsrecvjbpshndntaq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5012
  • C:\Windows\bthfrogtkxznshqvb.exe
    bthfrogtkxznshqvb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2088
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\bthfrogtkxznshqvb.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:1720
  • C:\Users\Admin\AppData\Local\Temp\bthfrogtkxznshqvb.exe
    C:\Users\Admin\AppData\Local\Temp\bthfrogtkxznshqvb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1792
  • C:\Windows\kdsrecvjbpshndntaq.exe
    kdsrecvjbpshndntaq.exe
    1⤵
    • Executes dropped EXE
    PID:4232
  • C:\Windows\bthfrogtkxznshqvb.exe
    bthfrogtkxznshqvb.exe
    1⤵
    • Executes dropped EXE
    PID:3612

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

        hllvtcgfihvvmnizrsjnnxvei.kjx
        • Path C:\Program Files (x86)\hllvtcgfihvvmnizrsjnnxvei.kjx
        • Size 272B
        • SHA256 fc4e3faaa44b8169f42b490a43be0c93ee3612fe1d6fb977da2270f065ef70dd
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        hllvtcgfihvvmnizrsjnnxvei.kjx
        • Path C:\Program Files (x86)\hllvtcgfihvvmnizrsjnnxvei.kjx
        • Size 272B
        • SHA256 426e4232988df4818f701deaf943e11df2639f09b6d5d269bd1260cda73caf88
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        hllvtcgfihvvmnizrsjnnxvei.kjx
        • Path C:\Program Files (x86)\hllvtcgfihvvmnizrsjnnxvei.kjx
        • Size 272B
        • SHA256 4b72fe5d3f21cae3764de5e507837faf4cba934e95e22661d89c8323066683cc
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        hllvtcgfihvvmnizrsjnnxvei.kjx
        • Path C:\Program Files (x86)\hllvtcgfihvvmnizrsjnnxvei.kjx
        • Size 272B
        • SHA256 3731548fd19743abba749066968e985ec1ecf73c1c44ecfca1fee84ddbf6b4ec
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        xdfrr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\xdfrr.exe
        • Size 712KB
        • SHA256 fd77eee12c0ca78b956a338e0e6628c1645e8e8c1ce23039f6f87301904c2103
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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

        hllvtcgfihvvmnizrsjnnxvei.kjx
        • Path C:\Users\Admin\AppData\Local\hllvtcgfihvvmnizrsjnnxvei.kjx
        • Size 272B
        • SHA256 2f451b38529d17669b6aac7174de1577872e2eaa8041ed27fe76b9b55156768e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        mbmhqkzjxhgrtflnqcetezicrbpzyjlxdfiu.lwr
        • Path C:\Users\Admin\AppData\Local\mbmhqkzjxhgrtflnqcetezicrbpzyjlxdfiu.lwr
        • Size 3KB
        • SHA256 dff639e1926d3bc982bbf8daed5120e481c922bc26973271f92927fdbccfc25b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        kdsrecvjbpshndntaq.exe
        • Path C:\Windows\SysWOW64\kdsrecvjbpshndntaq.exe
        • Size 524KB
        • SHA256 ce16cfb716ea2a3ebb272428883f5b7375f2b38c5eeff3c4e455baa9a9fb0168
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download