Overview

overview

10

Static

static

3

tmpvfrhow54.exe

windows10-ltsc_2021-x64

10

tmpvfrhow54.exe

windows10-2004-x64

10

tmpvfrhow54.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, 15:21

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General

  • Target
    tmpvfrhow54.exe
  • Size 560KB
  • Sample260522-srmaaafv9p
  • SHA256 91c53cbeec6bc93467588bd0657b4f5d1bb0658c5c89bc28ad599c8931db80b4
  • 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 35 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 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 19 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\tmpvfrhow54.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpvfrhow54.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1096
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\users\admin\appdata\local\temp\tmpvfrhow54.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:5588
      • C:\Users\Admin\AppData\Local\Temp\onbbip.exe
        "C:\Users\Admin\AppData\Local\Temp\onbbip.exe" "-C:\Users\Admin\AppData\Local\Temp\ajhrizqhtbuibqco.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 Location Discovery: System Language Discovery
        • System policy modification
        PID:4560
      • C:\Users\Admin\AppData\Local\Temp\onbbip.exe
        "C:\Users\Admin\AppData\Local\Temp\onbbip.exe" "-C:\Users\Admin\AppData\Local\Temp\ajhrizqhtbuibqco.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:5872
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\users\admin\appdata\local\temp\tmpvfrhow54.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:5928
  • C:\Windows\qbbngzslzjeupguisd.exe
    qbbngzslzjeupguisd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5104
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5540
  • C:\Windows\qbbngzslzjeupguisd.exe
    qbbngzslzjeupguisd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4520
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\qbbngzslzjeupguisd.exe*."
      2⤵
      • Executes dropped EXE
      PID:4856
  • C:\Windows\bnobvpjdsdzqmetitfg.exe
    bnobvpjdsdzqmetitfg.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3916
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\bnobvpjdsdzqmetitfg.exe*."
      2⤵
      • Executes dropped EXE
      PID:3772
  • C:\Users\Admin\AppData\Local\Temp\hrqbtldvirlaukxkt.exe
    C:\Users\Admin\AppData\Local\Temp\hrqbtldvirlaukxkt.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4476
  • C:\Windows\ajhrizqhtbuibqco.exe
    ajhrizqhtbuibqco.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5280
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\ajhrizqhtbuibqco.exe*."
      2⤵
      • Executes dropped EXE
      PID:2804
  • C:\Users\Admin\AppData\Local\Temp\ajhrizqhtbuibqco.exe
    C:\Users\Admin\AppData\Local\Temp\ajhrizqhtbuibqco.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5076
  • C:\Windows\drujfbxtkxvomgxobpshd.exe
    drujfbxtkxvomgxobpshd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1584
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\drujfbxtkxvomgxobpshd.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:1956
  • C:\Windows\drujfbxtkxvomgxobpshd.exe
    drujfbxtkxvomgxobpshd.exe
    1⤵
    • Executes dropped EXE
    PID:1428
  • C:\Windows\obdrmhcxnzwoleukwjlz.exe
    obdrmhcxnzwoleukwjlz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:220
  • C:\Windows\obdrmhcxnzwoleukwjlz.exe
    obdrmhcxnzwoleukwjlz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5500
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\obdrmhcxnzwoleukwjlz.exe*."
      2⤵
      • Executes dropped EXE
      PID:1260
  • C:\Users\Admin\AppData\Local\Temp\drujfbxtkxvomgxobpshd.exe
    C:\Users\Admin\AppData\Local\Temp\drujfbxtkxvomgxobpshd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2692
  • C:\Windows\hrqbtldvirlaukxkt.exe
    hrqbtldvirlaukxkt.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1808
  • C:\Windows\ajhrizqhtbuibqco.exe
    ajhrizqhtbuibqco.exe
    1⤵
    • Executes dropped EXE
    PID:3384
  • C:\Windows\hrqbtldvirlaukxkt.exe
    hrqbtldvirlaukxkt.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1172
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\hrqbtldvirlaukxkt.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:5296
  • C:\Users\Admin\AppData\Local\Temp\bnobvpjdsdzqmetitfg.exe
    C:\Users\Admin\AppData\Local\Temp\bnobvpjdsdzqmetitfg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:8
  • C:\Windows\bnobvpjdsdzqmetitfg.exe
    bnobvpjdsdzqmetitfg.exe
    1⤵
    • Executes dropped EXE
    PID:5232
  • C:\Users\Admin\AppData\Local\Temp\qbbngzslzjeupguisd.exe
    C:\Users\Admin\AppData\Local\Temp\qbbngzslzjeupguisd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3024
  • C:\Users\Admin\AppData\Local\Temp\obdrmhcxnzwoleukwjlz.exe
    C:\Users\Admin\AppData\Local\Temp\obdrmhcxnzwoleukwjlz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3396

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

        onbbip.exe
        • Path C:\Users\Admin\AppData\Local\Temp\onbbip.exe
        • Size 716KB
        • SHA256 5c26590fc32b9bb674f373bdaaa1dc7bdd227d7e96ab8830b6c8a7c7a7d0b55e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        qthqeovcadr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
        • Size 320KB
        • SHA256 e06d14e23a939d60df72ed2f1fe57a23aac1948460f0001dba804daa807e9e5b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        fzidfhjlibfeiifcvpytvxz.yrv
        • Path C:\Users\Admin\AppData\Local\fzidfhjlibfeiifcvpytvxz.yrv
        • Size 280B
        • SHA256 05c352f02f1ae11d42dda2e8d12e3a4c8e8948f75701491c67d04deae7c710bc
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sxrxkxkxfjyixiqychbhuhuhptishsaimr.rer
        • Path C:\Users\Admin\AppData\Local\sxrxkxkxfjyixiqychbhuhuhptishsaimr.rer
        • Size 4KB
        • SHA256 7b5299444897af96e8d1cbcd9718f2a25fd4200496337fbe88bd34ebfec4030b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        qbbngzslzjeupguisd.exe
        • Path C:\Windows\SysWOW64\qbbngzslzjeupguisd.exe
        • Size 560KB
        • SHA256 91c53cbeec6bc93467588bd0657b4f5d1bb0658c5c89bc28ad599c8931db80b4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download