Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/08/2026, 16:29

General

  • Target
    ZelloSetup (5).exe
  • Size 3.4MB
  • Sample260808-tzcw9avtes
  • SHA256 41f7f163d85a7f2e5ecb97babe00f7db6b53c7040c924df27fd77da434cd4c66
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 46 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ZelloSetup (5).exe
    "C:\Users\Admin\AppData\Local\Temp\ZelloSetup (5).exe"
    1⤵
    • Drops file in Program Files directory
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2136
    • C:\Users\Admin\AppData\Local\Temp\Zello.exe
      "C:\Users\Admin\AppData\Local\Temp\Zello.exe" -preinstall
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3856
    • C:\Program Files (x86)\Zello\Zello.exe
      "C:\Program Files (x86)\Zello\Zello.exe" -install
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:264
    • C:\Program Files (x86)\Zello\Zello.exe
      "C:\Program Files (x86)\Zello\Zello.exe"
      2⤵
      • Adds Run key to start application
      • Enumerates connected drives
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies system certificate store
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:4224
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x00000000000004F0 0x00000000000004F8
    1⤵
      PID:4892
    • C:\Program Files (x86)\Zello\Zello.exe
      "C:\Program Files (x86)\Zello\Zello.exe" /background
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:5128

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          ar

          • Path C:\Program Files (x86)\Zello\Lng\ar
          • Size 36KB
          • SHA256 f334483c44591953fb036b98430dc446408bc70c4cfeb17e1d63e272e59f6948
          • MD5 SHA1 SHA512 SSDEEP TLSH

          bg

          • Path C:\Program Files (x86)\Zello\Lng\bg
          • Size 51KB
          • SHA256 329a0d7cc29750af4ea0a62a3c304dc1ccefe0818100ebae292ed7fb536e283f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          cs

          • Path C:\Program Files (x86)\Zello\Lng\cs
          • Size 36KB
          • SHA256 797558143d4f57ba5e4c4cc24a7ed049f6c7a877ea9cebebbf43343318c2673a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          de

          • Path C:\Program Files (x86)\Zello\Lng\de
          • Size 38KB
          • SHA256 b56cda2456d4c32606757078db6710752b255cee6a3a5516dc4a5d3bd6e40e62
          • MD5 SHA1 SHA512 SSDEEP TLSH

          el

          • Path C:\Program Files (x86)\Zello\Lng\el
          • Size 55KB
          • SHA256 03e5d20bad26e39d83073e3ca2ff709f33fbafb1d53a58c9fba4169f7205ea28
          • MD5 SHA1 SHA512 SSDEEP TLSH

          en

          • Path C:\Program Files (x86)\Zello\Lng\en
          • Size 40KB
          • SHA256 0f3e54a0b7aebc9952701d7efcc3f2cbef42da56a340633a2abf1f5e87ea42e2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          es

          • Path C:\Program Files (x86)\Zello\Lng\es
          • Size 39KB
          • SHA256 be3b4a21a896da371d952083ffc71408fa18c3f96eca235dad7b6c65fe2800a0
          • MD5 SHA1 SHA512 SSDEEP TLSH

          fi

          • Path C:\Program Files (x86)\Zello\Lng\fi
          • Size 36KB
          • SHA256 00492622fb9f7786bf2f85303844ed4ee2ce5b7b40fb549e63dacae7feda1ceb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          fr

          • Path C:\Program Files (x86)\Zello\Lng\fr
          • Size 37KB
          • SHA256 d23824e5f4ca060fc3abeaa599f2e420313942689aa11d9415161549844ea4d7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          fr-CA

          • Path C:\Program Files (x86)\Zello\Lng\fr-CA
          • Size 39KB
          • SHA256 efb2620e4bcd7b3828e738a5a4ceefd92dfbb907635b1cebde18d48fd045f7ce
          • MD5 SHA1 SHA512 SSDEEP TLSH

          gl

          • Path C:\Program Files (x86)\Zello\Lng\gl
          • Size 36KB
          • SHA256 573c3a044abb3aee6a1726d523132c14f834e832444aadec01922b425927e89d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          he

          • Path C:\Program Files (x86)\Zello\Lng\he
          • Size 39KB
          • SHA256 5a279adc56280ededa21c15df3fe4610c0037338211b1474d7569328ec6a6931
          • MD5 SHA1 SHA512 SSDEEP TLSH

          hr

          • Path C:\Program Files (x86)\Zello\Lng\hr
          • Size 38KB
          • SHA256 8c8017ab8b1e6ca0265e1117f4352aa92e7157e4afe4fd077ef384432c5442b9
          • MD5 SHA1 SHA512 SSDEEP TLSH

          hu

          • Path C:\Program Files (x86)\Zello\Lng\hu
          • Size 37KB
          • SHA256 55c4dd61495e7e35eb3a5e0835c5be57316fd8994b229bc68849f0502c755706
          • MD5 SHA1 SHA512 SSDEEP TLSH

          id

          • Path C:\Program Files (x86)\Zello\Lng\id
          • Size 36KB
          • SHA256 3c73d7e4f64cf3fbccee6d0e4b46651387769c1ac70ad59dafc1b3729d361b2e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          it

          • Path C:\Program Files (x86)\Zello\Lng\it
          • Size 35KB
          • SHA256 09ef962d7fd8336fdfc2fc46145c30a2b344c36ade72211dbe7a582e35535ab7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ja

          • Path C:\Program Files (x86)\Zello\Lng\ja
          • Size 41KB
          • SHA256 deeaf1d1084e07aa1383c561b944c0a34697f62c0d24f301ecf57daf3593608a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          lt

          • Path C:\Program Files (x86)\Zello\Lng\lt
          • Size 39KB
          • SHA256 431e2df2f5a792a584bb7e5fe7e88f10d650601902bad604a7e1bc11fc4bb7ef
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ms

          • Path C:\Program Files (x86)\Zello\Lng\ms
          • Size 35KB
          • SHA256 f37bb3a116b260edf2cad2f76547d3660c991f39f45ec08b39fa2a17f5630d2a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          nl

          • Path C:\Program Files (x86)\Zello\Lng\nl
          • Size 36KB
          • SHA256 d83535d81a0f9504deb5589d7e837868b2eace261a56fc09892e1c66df13073f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          pl

          • Path C:\Program Files (x86)\Zello\Lng\pl
          • Size 39KB
          • SHA256 7ac170752ed6ec75b74db1a6f87ebdf581b6d55f81ce5669b67edb8efd2464ae
          • MD5 SHA1 SHA512 SSDEEP TLSH

          pt

          • Path C:\Program Files (x86)\Zello\Lng\pt
          • Size 38KB
          • SHA256 003046847964ef0bbde636f799cc89d95c536989009a51e61ef2f3678f878896
          • MD5 SHA1 SHA512 SSDEEP TLSH

          pt-br

          • Path C:\Program Files (x86)\Zello\Lng\pt-br
          • Size 38KB
          • SHA256 3ff03b4db4df26abd242812dd73c1a9c754f087db25fcc7def2e44c3e7891c4e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ro

          • Path C:\Program Files (x86)\Zello\Lng\ro
          • Size 40KB
          • SHA256 6d2da9e8d50d4b6c43dd99a49a640c1bec5b3330a07d82fd6e0740fb961e1360
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ru

          • Path C:\Program Files (x86)\Zello\Lng\ru
          • Size 52KB
          • SHA256 e60c0b95b9677bd785dec482bd2f2ab2149c69bf98416c14626a3c78bca889bf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          sk

          • Path C:\Program Files (x86)\Zello\Lng\sk
          • Size 36KB
          • SHA256 6b6c25b5ad064dd00acc4c06977a094c0db309a49c1664c78782809713356da3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          sr

          • Path C:\Program Files (x86)\Zello\Lng\sr
          • Size 38KB
          • SHA256 e727c6e314979ce8d46a9dd7d4cc20790114f483990ebc58bc8673b9ac2e7460
          • MD5 SHA1 SHA512 SSDEEP TLSH

          sv

          • Path C:\Program Files (x86)\Zello\Lng\sv
          • Size 37KB
          • SHA256 6160fd3b495da28e768adb8aeddb0b138575c9704b9d004260fd82612984baee
          • MD5 SHA1 SHA512 SSDEEP TLSH

          th

          • Path C:\Program Files (x86)\Zello\Lng\th
          • Size 57KB
          • SHA256 0a291059a5e7667bf59588f8e9d04d96ee8a0ce150fb97011745df55ae41f21a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          tr

          • Path C:\Program Files (x86)\Zello\Lng\tr
          • Size 37KB
          • SHA256 84b0ce3f80994e4e001e591f74728eea8870234e602c6f435c3a7495036197a8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          zh

          • Path C:\Program Files (x86)\Zello\Lng\zh
          • Size 35KB
          • SHA256 60800b4d040bef558db77d222932b58353e2c48c89b3bbfaa91178cd5298953e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          zh-Hans

          • Path C:\Program Files (x86)\Zello\Lng\zh-Hans
          • Size 35KB
          • SHA256 ca15323a27288af50277fe3322b9634484fa71ddd2bb66239f09342246638141
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Zello.exe

          • Path C:\Users\Admin\AppData\Local\Temp\Zello.exe
          • Size 7.7MB
          • SHA256 48b0770ac9463b84be6508cb946edf03c9088fa01333c95182a76e065407b7fe
          • MD5 SHA1 SHA512 SSDEEP TLSH

          InstallOptions.dll

          • Path C:\Users\Admin\AppData\Local\Temp\nsc96E.tmp\InstallOptions.dll
          • Size 15KB
          • SHA256 b34fb342f21d690aac024b6f48a597e78d15791ef480ac55159cd585d0f64af7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          System.dll

          • Path C:\Users\Admin\AppData\Local\Temp\nsc96E.tmp\System.dll
          • Size 12KB
          • SHA256 7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ioSpecial.ini

          • Path C:\Users\Admin\AppData\Local\Temp\nsc96E.tmp\ioSpecial.ini
          • Size 1KB
          • SHA256 2f478f8b39d75012717288091ea3c5b32462b6ab8c6de5fc8f97f46ae40f0be7
          • MD5 SHA1 SHA512 TLSH

          ioSpecial.ini

          • Path C:\Users\Admin\AppData\Local\Temp\nsc96E.tmp\ioSpecial.ini
          • Size 1KB
          • SHA256 da6692da31d4bcf683174c185f2263e94710466e0f6663574fbba3abd377c502
          • MD5 SHA1 SHA512 TLSH

          ltnsis.dll

          • Path C:\Users\Admin\AppData\Local\Temp\nsc96E.tmp\ltnsis.dll
          • Size 78KB
          • SHA256 082ecda048088ca888073637cd6628b37581816db9b999da7c70af38dd736bb3
          • MD5 SHA1 SHA512 SSDEEP TLSH