Overview

overview

10

Static

static

3

tmpgvcwtt0d.exe

windows10-ltsc_2021-x64

10

tmpgvcwtt0d.exe

windows10-2004-x64

10

tmpgvcwtt0d.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • 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, 14:12

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General

  • Target
    tmpgvcwtt0d.exe
  • Size 512KB
  • Sample260522-rh871sdv7p
  • SHA256 1d643f3ceaf2d8b1acfe46aa928f34a9af91dce13564e42af144585764a7bb67
  • 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
  • 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\tmpgvcwtt0d.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpgvcwtt0d.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3888
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\users\admin\appdata\local\temp\tmpgvcwtt0d.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:4232
      • C:\Users\Admin\AppData\Local\Temp\zakvelm.exe
        "C:\Users\Admin\AppData\Local\Temp\zakvelm.exe" "-C:\Users\Admin\AppData\Local\Temp\yibvndnhrwfadhmy.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:1648
      • C:\Users\Admin\AppData\Local\Temp\zakvelm.exe
        "C:\Users\Admin\AppData\Local\Temp\zakvelm.exe" "-C:\Users\Admin\AppData\Local\Temp\yibvndnhrwfadhmy.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:736
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\users\admin\appdata\local\temp\tmpgvcwtt0d.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:4320
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1124
  • C:\Users\Admin\AppData\Local\Temp\bqonkfutisggoxhywujhg.exe
    C:\Users\Admin\AppData\Local\Temp\bqonkfutisggoxhywujhg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:988
  • C:\Windows\zmifatgdqykiovdsokx.exe
    zmifatgdqykiovdsokx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4692
  • C:\Windows\bqonkfutisggoxhywujhg.exe
    bqonkfutisggoxhywujhg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2820
  • C:\Windows\fqkfypavgmwswbhuo.exe
    fqkfypavgmwswbhuo.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2376
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\fqkfypavgmwswbhuo.exe*."
      2⤵
      • Executes dropped EXE
      PID:1856
  • C:\Windows\fqkfypavgmwswbhuo.exe
    fqkfypavgmwswbhuo.exe
    1⤵
    • Executes dropped EXE
    PID:3424
  • C:\Windows\maxvrlzxluhgnveurocz.exe
    maxvrlzxluhgnveurocz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4712
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\maxvrlzxluhgnveurocz.exe*."
      2⤵
      • Executes dropped EXE
      PID:4044
  • C:\Windows\maxvrlzxluhgnveurocz.exe
    maxvrlzxluhgnveurocz.exe
    1⤵
    • Executes dropped EXE
    PID:1804
  • C:\Users\Admin\AppData\Local\Temp\oavrldplxepmrxesni.exe
    C:\Users\Admin\AppData\Local\Temp\oavrldplxepmrxesni.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4784
  • C:\Windows\oavrldplxepmrxesni.exe
    oavrldplxepmrxesni.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3280
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\oavrldplxepmrxesni.exe*."
      2⤵
      • Executes dropped EXE
      PID:3476
  • C:\Users\Admin\AppData\Local\Temp\maxvrlzxluhgnveurocz.exe
    C:\Users\Admin\AppData\Local\Temp\maxvrlzxluhgnveurocz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4832
  • C:\Windows\bqonkfutisggoxhywujhg.exe
    bqonkfutisggoxhywujhg.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4584
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\bqonkfutisggoxhywujhg.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:4048
  • C:\Users\Admin\AppData\Local\Temp\zmifatgdqykiovdsokx.exe
    C:\Users\Admin\AppData\Local\Temp\zmifatgdqykiovdsokx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3868
  • C:\Windows\yibvndnhrwfadhmy.exe
    yibvndnhrwfadhmy.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1220
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\yibvndnhrwfadhmy.exe*."
      2⤵
      • Executes dropped EXE
      PID:4180
  • C:\Users\Admin\AppData\Local\Temp\yibvndnhrwfadhmy.exe
    C:\Users\Admin\AppData\Local\Temp\yibvndnhrwfadhmy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1772
  • C:\Windows\zmifatgdqykiovdsokx.exe
    zmifatgdqykiovdsokx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:996
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\zmifatgdqykiovdsokx.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:3400
  • C:\Windows\oavrldplxepmrxesni.exe
    oavrldplxepmrxesni.exe
    1⤵
    • Executes dropped EXE
    PID:4028
  • C:\Windows\yibvndnhrwfadhmy.exe
    yibvndnhrwfadhmy.exe
    1⤵
    • Executes dropped EXE
    PID:1056
  • C:\Users\Admin\AppData\Local\Temp\fqkfypavgmwswbhuo.exe
    C:\Users\Admin\AppData\Local\Temp\fqkfypavgmwswbhuo.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4044

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

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        Downloads

        bairydclkecmexrsaihpyfkjsrl.tle
        • Path C:\Program Files (x86)\bairydclkecmexrsaihpyfkjsrl.tle
        • Size 280B
        • SHA256 f4dbeefc0d3979eb6a0f343340a08c8b6e223d0b8740ee9c6ebf4b9b37aa547e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bairydclkecmexrsaihpyfkjsrl.tle
        • Path C:\Program Files (x86)\bairydclkecmexrsaihpyfkjsrl.tle
        • Size 280B
        • SHA256 a3891fe8d6cfa08cf5bc135caf2a931e062d4ed9cf89a479f7e08c02f2b1a296
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        dhxvuubpnrh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
        • Size 320KB
        • SHA256 edd1a87c8ccdeb1ee2b2dc993c21f4008e84de5e648221055a45544b27b5dac3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        zakvelm.exe
        • Path C:\Users\Admin\AppData\Local\Temp\zakvelm.exe
        • Size 712KB
        • SHA256 ee4d90f7646022ea8d592df34ed99f6673cbe5bccd978414cbe327dc5749ddf1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        bairydclkecmexrsaihpyfkjsrl.tle
        • Path C:\Users\Admin\AppData\Local\bairydclkecmexrsaihpyfkjsrl.tle
        • Size 280B
        • SHA256 110343b9f4cfa95696e280debcb72cbebdd70ad616d55804ce2aaa65b5ce4ddd
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        yibvndnhrwfadhmyrkunhzpztdirmptykdwgzt.blf
        • Path C:\Users\Admin\AppData\Local\yibvndnhrwfadhmyrkunhzpztdirmptykdwgzt.blf
        • Size 4KB
        • SHA256 ac09bd4462f94bcb754b9abcfc7c578b26b6b20b24a489ff783ac4fa4e10563d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        oavrldplxepmrxesni.exe
        • Path C:\Windows\SysWOW64\oavrldplxepmrxesni.exe
        • Size 512KB
        • SHA256 1d643f3ceaf2d8b1acfe46aa928f34a9af91dce13564e42af144585764a7bb67
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download