Analysis

  • max time kernel
    94s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250410-en
  • resource tags

    arch:x64arch:x86image:win11-20250410-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    28/04/2025, 03:51

General

  • Target
    JaffaCakes118_dbfebfcccbacf0bab0c6674b3ba8ea91.exe
  • Size 320KB
  • Sample250428-eellbs1tcx
  • SHA256 296968043dbf6bcf99749b25fbddca245ca799d7d7f74430f0ab76097cd5b42d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • Pykspa

    Pykspa is a worm spreads via Skype uses DGA and it's written in C++.

  • Pykspa family
  • UAC bypass 3 TTPs 12 IoCs
  • Detect Pykspa worm 1 IoCs
  • Adds policy Run key to start application 2 TTPs 24 IoCs
  • Disables RegEdit via registry modification 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 64 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Hijack Execution Flow: Executable Installer File Permissions Weakness 1 TTPs 3 IoCs

    Possible Turn off User Account Control's privilege elevation for standard users.

  • Looks up external IP address via web service 5 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • System policy modification 1 TTPs 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dbfebfcccbacf0bab0c6674b3ba8ea91.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dbfebfcccbacf0bab0c6674b3ba8ea91.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Adds policy Run key to start application
    • Disables RegEdit via registry modification
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Hijack Execution Flow: Executable Installer File Permissions Weakness
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4532
    • C:\Users\Admin\AppData\Local\Temp\mtvchs.exe
      "C:\Users\Admin\AppData\Local\Temp\mtvchs.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
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • System policy modification
      PID:5028
    • C:\Users\Admin\AppData\Local\Temp\mtvchs.exe
      "C:\Users\Admin\AppData\Local\Temp\mtvchs.exe" "-"
      2⤵
      • 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
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:3728
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c bxokeetrqfqqmxlwdbplc.exe
    1⤵
      PID:2800
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c bxokeetrqfqqmxlwdbplc.exe .
      1⤵
        PID:1096
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c zticusfbylusmvhqvrd.exe
        1⤵
          PID:228
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c fxkcsoztozgcublsv.exe .
          1⤵
            PID:3552
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\ohvofcojfrzwpxiqup.exe
            1⤵
              PID:2840
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\ypbshcmfzjpkbhqw.exe .
              1⤵
                PID:5180
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c mhxslkyvthrqlvisyvid.exe
                1⤵
                  PID:784
                • C:\Windows\System32\rundll32.exe
                  C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                  1⤵
                    PID:5596
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ohvofcojfrzwpxiqup.exe .
                    1⤵
                      PID:3484
                    • C:\Windows\system32\cmd.exe
                      C:\Windows\system32\cmd.exe /c zticusfbylusmvhqvrd.exe .
                      1⤵
                        PID:2080
                      • C:\Windows\system32\cmd.exe
                        C:\Windows\system32\cmd.exe /c fxkcsoztozgcublsv.exe
                        1⤵
                          PID:812
                        • C:\Windows\system32\cmd.exe
                          C:\Windows\system32\cmd.exe /c mhxslkyvthrqlvisyvid.exe .
                          1⤵
                            PID:5804
                          • C:\Windows\system32\cmd.exe
                            C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\zticusfbylusmvhqvrd.exe
                            1⤵
                              PID:4632
                            • C:\Windows\system32\cmd.exe
                              C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\mhxslkyvthrqlvisyvid.exe
                              1⤵
                                PID:5012
                              • C:\Windows\system32\cmd.exe
                                C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\bxokeetrqfqqmxlwdbplc.exe .
                                1⤵
                                  PID:1684
                                • C:\Windows\system32\cmd.exe
                                  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\zticusfbylusmvhqvrd.exe .
                                  1⤵
                                    PID:4888
                                  • C:\Windows\system32\cmd.exe
                                    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\ypbshcmfzjpkbhqw.exe
                                    1⤵
                                      PID:5984
                                    • C:\Windows\system32\cmd.exe
                                      C:\Windows\system32\cmd.exe /c ypbshcmfzjpkbhqw.exe
                                      1⤵
                                        PID:3704
                                      • C:\Windows\system32\cmd.exe
                                        C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\fxkcsoztozgcublsv.exe
                                        1⤵
                                          PID:3160
                                        • C:\Windows\system32\cmd.exe
                                          C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\bxokeetrqfqqmxlwdbplc.exe
                                          1⤵
                                            PID:1100
                                          • C:\Windows\system32\cmd.exe
                                            C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\fxkcsoztozgcublsv.exe .
                                            1⤵
                                              PID:2032
                                            • C:\Windows\system32\cmd.exe
                                              C:\Windows\system32\cmd.exe /c ypbshcmfzjpkbhqw.exe .
                                              1⤵
                                                PID:3560
                                              • C:\Windows\system32\cmd.exe
                                                C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\ohvofcojfrzwpxiqup.exe .
                                                1⤵
                                                  PID:3424
                                                • C:\Windows\system32\cmd.exe
                                                  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\mhxslkyvthrqlvisyvid.exe .
                                                  1⤵
                                                    PID:4656
                                                  • C:\Windows\system32\cmd.exe
                                                    C:\Windows\system32\cmd.exe /c ohvofcojfrzwpxiqup.exe
                                                    1⤵
                                                      PID:3100

                                                    Network

                                                          MITRE ATT&CK Enterprise v16

                                                          Replay Monitor

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                                                          Downloads

                                                          bhioscbjsrmwcxvqhpntuaeonve.yio

                                                          • Path C:\Program Files (x86)\bhioscbjsrmwcxvqhpntuaeonve.yio
                                                          • Size 280B
                                                          • SHA256 c7b1d4edc3a045cc4ef07ab038e7ab573f8923b10657f84f8ae7da483202c86c
                                                          • MD5 SHA1 SHA512

                                                          bhioscbjsrmwcxvqhpntuaeonve.yio

                                                          • Path C:\Program Files (x86)\bhioscbjsrmwcxvqhpntuaeonve.yio
                                                          • Size 280B
                                                          • SHA256 379a2f9dfb7db865cbd8a678516bc5d811019bd5c47971b015f780973af18bc8
                                                          • MD5 SHA1 SHA512

                                                          mtvchs.exe

                                                          • Path C:\Users\Admin\AppData\Local\Temp\mtvchs.exe
                                                          • Size 700KB
                                                          • SHA256 28611558aabf75c28f048749c728bddb498f584ebe4f0a848d89e226ca8a8d78
                                                          • MD5 SHA1 SHA512 SSDEEP

                                                          bhioscbjsrmwcxvqhpntuaeonve.yio

                                                          • Path C:\Users\Admin\AppData\Local\bhioscbjsrmwcxvqhpntuaeonve.yio
                                                          • Size 280B
                                                          • SHA256 c0e6cc08d9d5e78b1d31e2d1cc15976cfe4e35768e4af4682a5e9a6dba284984
                                                          • MD5 SHA1 SHA512

                                                          bhioscbjsrmwcxvqhpntuaeonve.yio

                                                          • Path C:\Users\Admin\AppData\Local\bhioscbjsrmwcxvqhpntuaeonve.yio
                                                          • Size 280B
                                                          • SHA256 494ec2fa0b641981d82b5c9164a4fae2508f5efefa3690b1f122c0a421201859
                                                          • MD5 SHA1 SHA512

                                                          bhioscbjsrmwcxvqhpntuaeonve.yio

                                                          • Path C:\Users\Admin\AppData\Local\bhioscbjsrmwcxvqhpntuaeonve.yio
                                                          • Size 280B
                                                          • SHA256 4af4ee7fe8981dcde8027e34607175c2b3e60938edc23a5c66471388339998d1
                                                          • MD5 SHA1 SHA512

                                                          bhioscbjsrmwcxvqhpntuaeonve.yio

                                                          • Path C:\Users\Admin\AppData\Local\bhioscbjsrmwcxvqhpntuaeonve.yio
                                                          • Size 280B
                                                          • SHA256 11469dab260199b682039d13921550d7cf28155b48097359b75ad8dcad040061
                                                          • MD5 SHA1 SHA512

                                                          bhioscbjsrmwcxvqhpntuaeonve.yio

                                                          • Path C:\Users\Admin\AppData\Local\bhioscbjsrmwcxvqhpntuaeonve.yio
                                                          • Size 280B
                                                          • SHA256 cc62be0614f27e4e24c60dd7c3347879ffdef59d605341d09fdc6b28933819de
                                                          • MD5 SHA1 SHA512

                                                          bhioscbjsrmwcxvqhpntuaeonve.yio

                                                          • Path C:\Users\Admin\AppData\Local\bhioscbjsrmwcxvqhpntuaeonve.yio
                                                          • Size 280B
                                                          • SHA256 e460a4bdfdfb34dc2c960a0344c4a00245edea5f7739b6cea590673586053635
                                                          • MD5 SHA1 SHA512

                                                          ypbshcmfzjpkbhqwyrardujeohblrmdjsyatct.wlg

                                                          • Path C:\Users\Admin\AppData\Local\ypbshcmfzjpkbhqwyrardujeohblrmdjsyatct.wlg
                                                          • Size 4KB
                                                          • SHA256 f7f288eb3c53e4eb97e6d250e6b9b8d4fe4dfb08ec223170423d18f96c869019
                                                          • MD5 SHA1 SHA512 SSDEEP