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
    154s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-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 36 IoCs
    persistence
  • Disables RegEdit via registry modification 6 IoCs
    defense_evasion
  • Executes dropped EXE 28 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 7 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 5 IoCs

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

    discovery
  • 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\jaffacakes118__295ffe1fa6251cd7f43638aefce85e0a.exe
    "C:\Users\Admin\AppData\Local\Temp\jaffacakes118__295ffe1fa6251cd7f43638aefce85e0a.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4544
    • C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
      "C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.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
      • 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:5104
      • C:\Users\Admin\AppData\Local\Temp\tjoxdfp.exe
        "C:\Users\Admin\AppData\Local\Temp\tjoxdfp.exe" "-C:\Users\Admin\AppData\Local\Temp\srfxmxqbyvdphyjx.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:5216
      • C:\Users\Admin\AppData\Local\Temp\tjoxdfp.exe
        "C:\Users\Admin\AppData\Local\Temp\tjoxdfp.exe" "-C:\Users\Admin\AppData\Local\Temp\srfxmxqbyvdphyjx.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:4764
    • C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
      "C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.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:1380
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5468
  • C:\Windows\gjbxqfcrstfvrmbttild.exe
    gjbxqfcrstfvrmbttild.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:6056
    • C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
      "C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe" "c:\windows\gjbxqfcrstfvrmbttild.exe*."
      2⤵
      • Executes dropped EXE
      PID:5816
  • C:\Windows\srfxmxqbyvdphyjx.exe
    srfxmxqbyvdphyjx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3396
  • C:\Users\Admin\AppData\Local\Temp\ijztkxsfednbvobrpc.exe
    C:\Users\Admin\AppData\Local\Temp\ijztkxsfednbvobrpc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3496
  • C:\Windows\srfxmxqbyvdphyjx.exe
    srfxmxqbyvdphyjx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4816
    • C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
      "C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe" "c:\windows\srfxmxqbyvdphyjx.exe*."
      2⤵
      • Executes dropped EXE
      PID:5748
  • C:\Windows\tvmhznjxxxixsmarqeg.exe
    tvmhznjxxxixsmarqeg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3456
  • C:\Users\Admin\AppData\Local\Temp\srfxmxqbyvdphyjx.exe
    C:\Users\Admin\AppData\Local\Temp\srfxmxqbyvdphyjx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4904
  • C:\Windows\ijztkxsfednbvobrpc.exe
    ijztkxsfednbvobrpc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1240
  • C:\Windows\gjbxqfcrstfvrmbttild.exe
    gjbxqfcrstfvrmbttild.exe
    1⤵
    • Executes dropped EXE
    PID:5356
  • C:\Windows\zzohxjdpnluhasetq.exe
    zzohxjdpnluhasetq.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4744
    • C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
      "C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe" "c:\windows\zzohxjdpnluhasetq.exe*."
      2⤵
      • Executes dropped EXE
      PID:4592
  • C:\Users\Admin\AppData\Local\Temp\zzohxjdpnluhasetq.exe
    C:\Users\Admin\AppData\Local\Temp\zzohxjdpnluhasetq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4224
  • C:\Windows\vzspjzxnprevsoexyosli.exe
    vzspjzxnprevsoexyosli.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1912
    • C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
      "C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe" "c:\windows\vzspjzxnprevsoexyosli.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:2344
  • C:\Users\Admin\AppData\Local\Temp\vzspjzxnprevsoexyosli.exe
    C:\Users\Admin\AppData\Local\Temp\vzspjzxnprevsoexyosli.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5108
  • C:\Windows\ijztkxsfednbvobrpc.exe
    ijztkxsfednbvobrpc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5836
    • C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
      "C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe" "c:\windows\ijztkxsfednbvobrpc.exe*."
      2⤵
      • Executes dropped EXE
      PID:3180
  • C:\Windows\vzspjzxnprevsoexyosli.exe
    vzspjzxnprevsoexyosli.exe
    1⤵
    • Executes dropped EXE
    PID:1596
  • C:\Windows\tvmhznjxxxixsmarqeg.exe
    tvmhznjxxxixsmarqeg.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3568
    • C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
      "C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe" "c:\windows\tvmhznjxxxixsmarqeg.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:1284
  • C:\Users\Admin\AppData\Local\Temp\gjbxqfcrstfvrmbttild.exe
    C:\Users\Admin\AppData\Local\Temp\gjbxqfcrstfvrmbttild.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3016
  • C:\Users\Admin\AppData\Local\Temp\tvmhznjxxxixsmarqeg.exe
    C:\Users\Admin\AppData\Local\Temp\tvmhznjxxxixsmarqeg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4432
  • C:\Windows\zzohxjdpnluhasetq.exe
    zzohxjdpnluhasetq.exe
    1⤵
    • Executes dropped EXE
    PID:5808

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

        System Network Configuration Discovery

        1
        T1016

        Internet Connection Discovery

        1
        T1016.001

        Lateral Movement

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        cfmzlrarmpw.exe
        • Path C:\Users\Admin\AppData\Local\Temp\cfmzlrarmpw.exe
        • Size 320KB
        • SHA256 8ffb6cc7a12d5a243de5ccae59ea2e576db4035d240203dcab847c4eaf197205
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        tjoxdfp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\tjoxdfp.exe
        • Size 712KB
        • SHA256 66720a51b57dc5d13b630f0e9ab368f47ce767c1c436f3da679b4056ec87a04e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mzbhkjqpalhhnsrtdcprxazgfq.xxd
        • Path C:\Users\Admin\AppData\Local\mzbhkjqpalhhnsrtdcprxazgfq.xxd
        • Size 280B
        • SHA256 5835a185c1cf826f30e68f5b8dfadedcbe61f127cfcebba45e4b508ac07edacd
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nlypdnfplhozqgqdyigtkyiakgcjulblytdbo.tdv
        • Path C:\Users\Admin\AppData\Local\nlypdnfplhozqgqdyigtkyiakgcjulblytdbo.tdv
        • Size 4KB
        • SHA256 156d5c2d3726d2fd039f1e3b9decc27a574a3608a62a1aac40797cbc3bf014e4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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