Overview

overview

10

Static

static

3

tmpkfdisqat.exe

windows10-ltsc_2021-x64

10

tmpkfdisqat.exe

windows10-2004-x64

10

tmpkfdisqat.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    157s
  • 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, 15:03

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General

  • Target
    tmpkfdisqat.exe
  • Size 516KB
  • Sample260522-sff9wshs8x
  • SHA256 1c4fcff23a29745f4898a96751ebc60a54f24d887eb91c1c94eb0e8b91dfa288
  • 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 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 6 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\tmpkfdisqat.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpkfdisqat.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:6128
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\users\admin\appdata\local\temp\tmpkfdisqat.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:4932
      • C:\Users\Admin\AppData\Local\Temp\inwcer.exe
        "C:\Users\Admin\AppData\Local\Temp\inwcer.exe" "-C:\Users\Admin\AppData\Local\Temp\ujcsebsfxidamcnp.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:2476
      • C:\Users\Admin\AppData\Local\Temp\inwcer.exe
        "C:\Users\Admin\AppData\Local\Temp\inwcer.exe" "-C:\Users\Admin\AppData\Local\Temp\ujcsebsfxidamcnp.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:3572
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\users\admin\appdata\local\temp\tmpkfdisqat.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:1384
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5168
  • C:\Windows\kbwocbujdqnmasfjtx.exe
    kbwocbujdqnmasfjtx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4244
  • C:\Users\Admin\AppData\Local\Temp\xrpkbdzroeegxsipcjlfd.exe
    C:\Users\Admin\AppData\Local\Temp\xrpkbdzroeegxsipcjlfd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1768
  • C:\Windows\xrpkbdzroeegxsipcjlfd.exe
    xrpkbdzroeegxsipcjlfd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2696
  • C:\Windows\xrpkbdzroeegxsipcjlfd.exe
    xrpkbdzroeegxsipcjlfd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5612
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\xrpkbdzroeegxsipcjlfd.exe*."
      2⤵
      • Executes dropped EXE
      PID:1012
  • C:\Windows\ibysijevrgfgwqflxdex.exe
    ibysijevrgfgwqflxdex.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\ibysijevrgfgwqflxdex.exe*."
      2⤵
      • Executes dropped EXE
      PID:4864
  • C:\Users\Admin\AppData\Local\Temp\brlcpnftmyusfwilu.exe
    C:\Users\Admin\AppData\Local\Temp\brlcpnftmyusfwilu.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1816
  • C:\Windows\ujcsebsfxidamcnp.exe
    ujcsebsfxidamcnp.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2572
  • C:\Windows\vnjcrrlbwkiixqejuzz.exe
    vnjcrrlbwkiixqejuzz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2724
  • C:\Windows\kbwocbujdqnmasfjtx.exe
    kbwocbujdqnmasfjtx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5384
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\kbwocbujdqnmasfjtx.exe*."
      2⤵
      • Executes dropped EXE
      PID:5632
  • C:\Windows\brlcpnftmyusfwilu.exe
    brlcpnftmyusfwilu.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3564
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\brlcpnftmyusfwilu.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:4724
  • C:\Users\Admin\AppData\Local\Temp\vnjcrrlbwkiixqejuzz.exe
    C:\Users\Admin\AppData\Local\Temp\vnjcrrlbwkiixqejuzz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1856
  • C:\Users\Admin\AppData\Local\Temp\ujcsebsfxidamcnp.exe
    C:\Users\Admin\AppData\Local\Temp\ujcsebsfxidamcnp.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1032
  • C:\Windows\ibysijevrgfgwqflxdex.exe
    ibysijevrgfgwqflxdex.exe
    1⤵
    • Executes dropped EXE
    PID:3744
  • C:\Windows\ujcsebsfxidamcnp.exe
    ujcsebsfxidamcnp.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3884
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\ujcsebsfxidamcnp.exe*."
      2⤵
      • Executes dropped EXE
      PID:4748
  • C:\Users\Admin\AppData\Local\Temp\kbwocbujdqnmasfjtx.exe
    C:\Users\Admin\AppData\Local\Temp\kbwocbujdqnmasfjtx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1056
  • C:\Windows\vnjcrrlbwkiixqejuzz.exe
    vnjcrrlbwkiixqejuzz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3520
    • C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
      "C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe" "c:\windows\vnjcrrlbwkiixqejuzz.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:4612
  • C:\Users\Admin\AppData\Local\Temp\ibysijevrgfgwqflxdex.exe
    C:\Users\Admin\AppData\Local\Temp\ibysijevrgfgwqflxdex.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5048
  • C:\Windows\brlcpnftmyusfwilu.exe
    brlcpnftmyusfwilu.exe
    1⤵
    • Executes dropped EXE
    PID:3324

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

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        Downloads

        zxzytzzvwquavuozqbhfh.bhh
        • Path C:\Program Files (x86)\zxzytzzvwquavuozqbhfh.bhh
        • Size 272B
        • SHA256 9fa619587d98b9c40cacdcb202e5ee1a92cbed5164edfac940095c350e78b256
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        zxzytzzvwquavuozqbhfh.bhh
        • Path C:\Program Files (x86)\zxzytzzvwquavuozqbhfh.bhh
        • Size 272B
        • SHA256 8eebaeffd73e79e739588e7b14b5311d9366fb68cba45384a2b3a8e4fbd78e97
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        zxzytzzvwquavuozqbhfh.bhh
        • Path C:\Program Files (x86)\zxzytzzvwquavuozqbhfh.bhh
        • Size 272B
        • SHA256 85768c5ccebdd1d1f8ed184d3b522b8d3c59ebcdfe942a26b523d96300855eb3
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        inwcer.exe
        • Path C:\Users\Admin\AppData\Local\Temp\inwcer.exe
        • Size 700KB
        • SHA256 dd6684ad56b51fa1ed8b6d08e0183c927b6c97ca230cdf45c2645d707157f000
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        umtekhkhewd.exe
        • Path C:\Users\Admin\AppData\Local\Temp\umtekhkhewd.exe
        • Size 320KB
        • SHA256 0cc02d34d5fd4cf892fed282f98c1ad3e7dd6159a8877ae5c46d3f834ed36060
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        udqagxipbgvmschdfbsboyevgnzetkqa.bdz
        • Path C:\Users\Admin\AppData\Local\udqagxipbgvmschdfbsboyevgnzetkqa.bdz
        • Size 3KB
        • SHA256 927579123a8562df44c3c71348460196b9dbb0d3bcbf60d6cf222b1b4e960d98
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        zxzytzzvwquavuozqbhfh.bhh
        • Path C:\Users\Admin\AppData\Local\zxzytzzvwquavuozqbhfh.bhh
        • Size 272B
        • SHA256 d1263bf512cee4abd1d9b4d967b50a54e741edc4bbee143c55cc6494460f026b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        kbwocbujdqnmasfjtx.exe
        • Path C:\Windows\SysWOW64\kbwocbujdqnmasfjtx.exe
        • Size 516KB
        • SHA256 1c4fcff23a29745f4898a96751ebc60a54f24d887eb91c1c94eb0e8b91dfa288
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download