Analysis

  • max time kernel
    93s
  • max time network
    94s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/11/2024, 15:04

General

  • Target

    ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe

  • Size

    196KB

  • MD5

    07f35139b8c124c730d8c073b7b9cfc0

  • SHA1

    1bda918d117b2e20ff9543c03a4abaeb799119fa

  • SHA256

    ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47f

  • SHA512

    ee478bbcf7273843d31cc5e77df4612edf12d2dfcc3a19e08e27ed38fa63b004df23265cbc9644bdd1bb3f23fb894b4fc366b25e8afe9fc9b40c50fdc382488f

  • SSDEEP

    3072:ZOgUXoutNNxZVX4/awxfodLJUBv9Bsor1rHjhMU9npQQpmuG:ZFYoSrRARoYlld9n2Qpmx

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables use of System Restore points 1 TTPs
  • Executes dropped EXE 7 IoCs
  • Modifies system executable filetype association 2 TTPs 13 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops file in System32 directory 6 IoCs
  • UPX packed file 18 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Windows directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Modifies Control Panel 4 IoCs
  • Modifies registry class 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe
    "C:\Users\Admin\AppData\Local\Temp\ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47fN.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Modifies visibility of file extensions in Explorer
    • Modifies visiblity of hidden/system files in Explorer
    • Disables RegEdit via registry modification
    • Modifies system executable filetype association
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2172
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4032
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:1656
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:3368
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2260
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4692
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4888
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:3360

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE

          Filesize

          196KB

          MD5

          160020ded8997323f1c29c67457927cb

          SHA1

          153dbf6a07ede74140e700e4b2a6a5d8dc72813d

          SHA256

          1bffde0e07ae435974db0a9b95bb971acd94a773e9b5907de917a03851317c70

          SHA512

          f303a00d703c11f07f34bd7436c080a2a2ad1f82b89bd5a5b01e1c8631fbcd0c59f20526d559103c0d04524621e40d48b5197b2d32e33ee1a1617bfcc5e17490

        • C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE

          Filesize

          196KB

          MD5

          9eb3af4ac8607b60cee12e0bb0e48b89

          SHA1

          7e60a3639b0efe29c0ba3a208ee4b423aa47bea8

          SHA256

          9eb6f3ab1e64e55f6495308115ea1ba69bf43ea170a0a99d59f32d7b19d64223

          SHA512

          4ae423eaa21e12c285c83e058cbb9e1f0615a539b694e0f48c02e420a4e1b3d823c7cb69fcd5201f25cadfa26db971dc8e28db15edc21f0fa7bb064860e7f313

        • C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE

          Filesize

          196KB

          MD5

          78a55e33e9b70dc1a49db07d2cd7f122

          SHA1

          10bc6aa48ef11ab2a3080bf289568ab3a284e71b

          SHA256

          5d02df8de8ae5248443a136a994c1f9e17769d7572f59f8d87a93e6028132c8b

          SHA512

          da05cf175dbe14c2aba58b3f5deb38f2acbc1ccebe0aae5461e0d414b4e5055b25a7da0eac4232e980011c65575979a2b6c229cede430650fff525599d253fc7

        • C:\Users\Admin\AppData\Local\winlogon.exe

          Filesize

          196KB

          MD5

          07f35139b8c124c730d8c073b7b9cfc0

          SHA1

          1bda918d117b2e20ff9543c03a4abaeb799119fa

          SHA256

          ef7031b83716a98591da92f00dac92464093c75e111fee49cd26804ff593c47f

          SHA512

          ee478bbcf7273843d31cc5e77df4612edf12d2dfcc3a19e08e27ed38fa63b004df23265cbc9644bdd1bb3f23fb894b4fc366b25e8afe9fc9b40c50fdc382488f

        • C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE

          Filesize

          196KB

          MD5

          1989c93a9cfe5e130eb2bd0506f3e75c

          SHA1

          c13ebfa7db822a2f60f1095acfcef9b614a3c4b7

          SHA256

          6e3e2c9c9993c3a0eeceebe2109e7f0d95479fca88116c89075aa4879eaf71a8

          SHA512

          fb2a9da71b77fcd09e1318874c6a7bfff079c7902355b557ff4af08dbac9934ef7c09988907d9e1a22f79a8ef00df74387c6074c04eb49893950949592cc7300

        • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE

          Filesize

          196KB

          MD5

          4bd71fe0af33f8f1760228c1b5599253

          SHA1

          d8635c76f654e3174555fe5f2808b8d9026a062f

          SHA256

          f0c76d6443cd102136bf6f305d62735ec229e51075dc2aed3f917353d9eb31bb

          SHA512

          8b692a67b82873c64ccf55f06d982eda26fe4d142d65305e44e21c5f5bbb6af1b05f1449a1c41be96127210d7c4abbc6b1572b10bf26434bbc151e95d2e165f2

        • C:\Windows\SysWOW64\IExplorer.exe

          Filesize

          196KB

          MD5

          ca16bc883246f56484365df251136eb8

          SHA1

          67595e01395731f4ab6c5df44e888d686dc1fa94

          SHA256

          84bd429915f459b8d680cc5784d07255d7de6d48fb0d42d529a8df7adb79a6c8

          SHA512

          2328388319befa430dd4f14b68d14370a033085dab9553c903fd18f0910f9b8fda26fb51226f933ced74a176452ff910150bea0035b14592a4e909b4b71553ff

        • C:\Windows\xk.exe

          Filesize

          196KB

          MD5

          287a690b831ad3a09eb5bacc8e82fc70

          SHA1

          a29984d6258859e7ac9f826505d1292cb12d4b72

          SHA256

          e6168dd5ac5db9bbd14d842f7058deb7bed56c1215d4d73a2ab4ca3f47b4c68c

          SHA512

          92515b42263bca1187645bafe27fa779763d25d670ce6dca6bc430af5b67a4b94ce14a91ca27d86b0fe9433d460e2f8e7e484c71c8da50457237b5e27fa9fb27

        • memory/1656-117-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/2172-0-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/2172-154-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/2260-132-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/3360-153-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/3368-124-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/4032-112-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/4692-138-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/4888-146-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/4888-142-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB