Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    01-07-2024 14:47

General

  • Target

    Help/welcomeback.htm

  • Size

    1KB

  • MD5

    cb7bd08e4cb4eec6838aa20b97c7968f

  • SHA1

    acb39c036d715efd7655dc9184f258020769d89c

  • SHA256

    8879c8bd9b59bcf1cdd81b35e4b100eadf78ba232e7375ade0820312ad568374

  • SHA512

    c07164154e1d069630670be9e027325e335a9ef6134d46c8319e4f878a0ba96c695417f9e392be21faef02046f86588e30461ea877ee0490a9487cc587b8d0a9

Score
4/10

Malware Config

Signatures

  • Drops file in Windows directory 4 IoCs
  • Modifies Internet Explorer settings 1 TTPs 3 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Windows\system32\LaunchWinApp.exe
    "C:\Windows\system32\LaunchWinApp.exe" "C:\Users\Admin\AppData\Local\Temp\Help\welcomeback.htm"
    1⤵
      PID:4596
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
      1⤵
      • Drops file in Windows directory
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:808
    • C:\Windows\system32\browser_broker.exe
      C:\Windows\system32\browser_broker.exe -Embedding
      1⤵
      • Modifies Internet Explorer settings
      PID:2424
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4308
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2184
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      PID:2540
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      PID:888

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\L5P12AEX\edgecompatviewlist[1].xml
      Filesize

      74KB

      MD5

      d4fc49dc14f63895d997fa4940f24378

      SHA1

      3efb1437a7c5e46034147cbbc8db017c69d02c31

      SHA256

      853d2f4eb81c9fdcea2ee079f6faf98214b111b77cdf68709b38989d123890f1

      SHA512

      cc60d79b4afe5007634ac21dc4bc92081880be4c0d798a1735b63b27e936c02f399964f744dc73711987f01e8a1064b02a4867dd6cac27538e5fbe275cc61e0a

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\TABYYGGX\suggestions[1].en-US
      Filesize

      17KB

      MD5

      5a34cb996293fde2cb7a4ac89587393a

      SHA1

      3c96c993500690d1a77873cd62bc639b3a10653f

      SHA256

      c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

      SHA512

      e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

    • memory/808-16-0x0000011342420000-0x0000011342430000-memory.dmp
      Filesize

      64KB

    • memory/808-35-0x00000113413C0000-0x00000113413C2000-memory.dmp
      Filesize

      8KB

    • memory/808-82-0x000001134A7F0000-0x000001134A7F1000-memory.dmp
      Filesize

      4KB

    • memory/808-0-0x0000011342320000-0x0000011342330000-memory.dmp
      Filesize

      64KB

    • memory/808-81-0x000001134A7E0000-0x000001134A7E1000-memory.dmp
      Filesize

      4KB

    • memory/2184-47-0x0000013B3B100000-0x0000013B3B200000-memory.dmp
      Filesize

      1024KB

    • memory/2540-58-0x0000018FCAD20000-0x0000018FCAD22000-memory.dmp
      Filesize

      8KB

    • memory/2540-62-0x0000018FCAE00000-0x0000018FCAE02000-memory.dmp
      Filesize

      8KB

    • memory/2540-60-0x0000018FCADE0000-0x0000018FCADE2000-memory.dmp
      Filesize

      8KB

    • memory/2540-56-0x0000018FCAD00000-0x0000018FCAD02000-memory.dmp
      Filesize

      8KB

    • memory/2540-53-0x0000018FCACD0000-0x0000018FCACD2000-memory.dmp
      Filesize

      8KB

    • memory/2540-52-0x0000018FBA700000-0x0000018FBA800000-memory.dmp
      Filesize

      1024KB