Analysis

  • max time kernel
    142s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-08-2024 14:13

General

  • Target

    b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe

  • Size

    437KB

  • MD5

    9eab5d6f597d5f8492f737140b536bf7

  • SHA1

    dc32cbccab029046c27f4a43be802b9f37fe932e

  • SHA256

    b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f

  • SHA512

    7cee1ce8079f40c1804d3b553b4859b8ab1c6f700b4f637cd72c6702aaa19fe5e64b71f1048faa6a1246892cef482dc46bd6fef0b4b76433b75c31c33a7116d2

  • SSDEEP

    6144:UJVwm2i+mKaN68U8Wdvym8fXZkP/L07IkX/c6MVO4zXUdn1NwBLDmFBF3UN:rri+m/A4Wx3UG/LzARMVO4sNyDm3F3U

Malware Config

Signatures

  • Expiro, m0yv

    Expiro aka m0yv is a multi-functional backdoor written in C++.

  • Expiro payload 4 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe
    "C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:3320
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3320 -s 476
      2⤵
      • Program crash
      PID:4516
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3320 -ip 3320
    1⤵
      PID:4832
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4112,i,9445584274764997943,12714240264001792460,262144 --variations-seed-version --mojo-platform-channel-handle=4020 /prefetch:8
      1⤵
        PID:4056

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/3320-0-0x0000000000420000-0x00000000004B4000-memory.dmp

        Filesize

        592KB

      • memory/3320-1-0x00000000003B0000-0x00000000004B4000-memory.dmp

        Filesize

        1.0MB

      • memory/3320-2-0x0000000000420000-0x00000000004B4000-memory.dmp

        Filesize

        592KB

      • memory/3320-3-0x00000000003B0000-0x00000000004B4000-memory.dmp

        Filesize

        1.0MB