Overview

overview

10

Static

static

3

jaffacakes...0a.exe

windows10-2004-x64

10

jaffacakes...0a.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    20/09/2026, 22:50

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General

  • Target
    jaffacakes118__295ffe1fa6251cd7f43638aefce85e0a.exe
  • Size 572KB
  • Sample260920-2sdtzadf87
  • SHA256 4820e4c4beacac148b1def682c9abedfbad5c3d6067cd96f242c99f7807196b5
  • 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 33 IoCs
    persistence
  • Disables RegEdit via registry modification 6 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 1 TTPs 8 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

    discovery
  • 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 20 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\jaffacakes118__295ffe1fa6251cd7f43638aefce85e0a.exe
    "C:\Users\Admin\AppData\Local\Temp\jaffacakes118__295ffe1fa6251cd7f43638aefce85e0a.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:6080
    • C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
      "C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe" "c:\users\admin\appdata\local\temp\jaffacakes118__295ffe1fa6251cd7f43638aefce85e0a.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:5068
      • C:\Users\Admin\AppData\Local\Temp\ipvzgk.exe
        "C:\Users\Admin\AppData\Local\Temp\ipvzgk.exe" "-C:\Users\Admin\AppData\Local\Temp\ulbpgurcvidiqvjm.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:5292
      • C:\Users\Admin\AppData\Local\Temp\ipvzgk.exe
        "C:\Users\Admin\AppData\Local\Temp\ipvzgk.exe" "-C:\Users\Admin\AppData\Local\Temp\ulbpgurcvidiqvjm.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:5212
    • C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
      "C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe" "c:\users\admin\appdata\local\temp\jaffacakes118__295ffe1fa6251cd7f43638aefce85e0a.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:5852
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1044
  • C:\Windows\xtohdwyomeeoblemtrlhc.exe
    xtohdwyomeeoblemtrlhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3468
  • C:\Windows\idxpkcdspgfoajbiolez.exe
    idxpkcdspgfoajbiolez.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5192
  • C:\Users\Admin\AppData\Local\Temp\vpiztkkyukiqbjaglhz.exe
    C:\Users\Admin\AppData\Local\Temp\vpiztkkyukiqbjaglhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1864
  • C:\Windows\ulbpgurcvidiqvjm.exe
    ulbpgurcvidiqvjm.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1620
    • C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
      "C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe" "c:\windows\ulbpgurcvidiqvjm.exe*."
      2⤵
      • Executes dropped EXE
      PID:620
  • C:\Windows\ulbpgurcvidiqvjm.exe
    ulbpgurcvidiqvjm.exe
    1⤵
    • Executes dropped EXE
    PID:5736
  • C:\Windows\idxpkcdspgfoajbiolez.exe
    idxpkcdspgfoajbiolez.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4804
    • C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
      "C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe" "c:\windows\idxpkcdspgfoajbiolez.exe*."
      2⤵
      • Executes dropped EXE
      PID:548
  • C:\Windows\btkzrgeqkyuajpeil.exe
    btkzrgeqkyuajpeil.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:672
  • C:\Users\Admin\AppData\Local\Temp\btkzrgeqkyuajpeil.exe
    C:\Users\Admin\AppData\Local\Temp\btkzrgeqkyuajpeil.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:6120
  • C:\Windows\btkzrgeqkyuajpeil.exe
    btkzrgeqkyuajpeil.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3980
    • C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
      "C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe" "c:\windows\btkzrgeqkyuajpeil.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:2184
  • C:\Windows\xtohdwyomeeoblemtrlhc.exe
    xtohdwyomeeoblemtrlhc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:680
    • C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
      "C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe" "c:\windows\xtohdwyomeeoblemtrlhc.exe*."
      2⤵
      • Executes dropped EXE
      PID:2240
  • C:\Users\Admin\AppData\Local\Temp\xtohdwyomeeoblemtrlhc.exe
    C:\Users\Admin\AppData\Local\Temp\xtohdwyomeeoblemtrlhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5424
  • C:\Windows\vpiztkkyukiqbjaglhz.exe
    vpiztkkyukiqbjaglhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1016
  • C:\Users\Admin\AppData\Local\Temp\ulbpgurcvidiqvjm.exe
    C:\Users\Admin\AppData\Local\Temp\ulbpgurcvidiqvjm.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1348
  • C:\Windows\vpiztkkyukiqbjaglhz.exe
    vpiztkkyukiqbjaglhz.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5272
    • C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
      "C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe" "c:\windows\vpiztkkyukiqbjaglhz.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:4816
  • C:\Windows\kdvleutgbqnuelbgkf.exe
    kdvleutgbqnuelbgkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5112
  • C:\Windows\kdvleutgbqnuelbgkf.exe
    kdvleutgbqnuelbgkf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:6136
    • C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
      "C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe" "c:\windows\kdvleutgbqnuelbgkf.exe*."
      2⤵
      • Executes dropped EXE
      PID:5740
  • C:\Users\Admin\AppData\Local\Temp\idxpkcdspgfoajbiolez.exe
    C:\Users\Admin\AppData\Local\Temp\idxpkcdspgfoajbiolez.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3892
  • C:\Users\Admin\AppData\Local\Temp\kdvleutgbqnuelbgkf.exe
    C:\Users\Admin\AppData\Local\Temp\kdvleutgbqnuelbgkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3812

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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        System Network Configuration Discovery

        1
        T1016

        Internet Connection Discovery

        1
        T1016.001

        Lateral Movement

        Replication Through Removable Media

        1
        T1091

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

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        Downloads

        yzzxywdybydskzxkwzyzzx.wdy
        • Path C:\Program Files (x86)\yzzxywdybydskzxkwzyzzx.wdy
        • Size 280B
        • SHA256 1f50e2e65bf2479f04cd61aaebd8b92e36cac666df1876d777e3001fb6562c80
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        yzzxywdybydskzxkwzyzzx.wdy
        • Path C:\Program Files (x86)\yzzxywdybydskzxkwzyzzx.wdy
        • Size 280B
        • SHA256 c6820ebadc9c38f3a88a9eee40f0b9075858d67ec8b7c267ea1b2f3d78173a07
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        yzzxywdybydskzxkwzyzzx.wdy
        • Path C:\Program Files (x86)\yzzxywdybydskzxkwzyzzx.wdy
        • Size 280B
        • SHA256 f0f4143e24cc5e61cce5ec676cbe8bf788754f37e7f6fd5afef65fa8652fba83
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ipvzgk.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ipvzgk.exe
        • Size 688KB
        • SHA256 83b93838a22b5e72a8c3e879f02e36606f083f1103fcaae00922b37a56795882
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        uuxxgebpeeh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\uuxxgebpeeh.exe
        • Size 320KB
        • SHA256 1eb89135622af86c50cf9965a80bab6ed57b220274b1ab38439f8cdae00a0ba0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        pbmvhqiockaaddmkhvfrclxgyesaqqttc.xlv
        • Path C:\Users\Admin\AppData\Local\pbmvhqiockaaddmkhvfrclxgyesaqqttc.xlv
        • Size 4KB
        • SHA256 c255a782d33e6f192c9bd33401982ccb1fe3845e8a720eb993b8148ac52559b9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        yzzxywdybydskzxkwzyzzx.wdy
        • Path C:\Users\Admin\AppData\Local\yzzxywdybydskzxkwzyzzx.wdy
        • Size 280B
        • SHA256 8517d312fdcf15afbae502cea32d81a68446312bea35db17d3ac92e1b3a115a8
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        kdvleutgbqnuelbgkf.exe
        • Path C:\Windows\SysWOW64\kdvleutgbqnuelbgkf.exe
        • Size 572KB
        • SHA256 4820e4c4beacac148b1def682c9abedfbad5c3d6067cd96f242c99f7807196b5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download