Analysis

  • max time kernel
    119s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    31-08-2024 01:26

General

  • Target

    b173b03e0988654a331c46e31e2438115d34fc57a7550a66aee784d1e74300d3.exe

  • Size

    476KB

  • MD5

    5d9afa34d58d686ea27ab01f4f681d56

  • SHA1

    4301075acafdd765528e91950c6a89b96889d97c

  • SHA256

    b173b03e0988654a331c46e31e2438115d34fc57a7550a66aee784d1e74300d3

  • SHA512

    7912d1190a6d440d906c7cd908ff03d95187b894f469fc1cda0dcf985e61b74e376cd41e39fdac582e438f1c10e4be63c53e1943986943081b97cc99c72a2934

  • SSDEEP

    12288:yYmIjE7eNdKcWEb92Ubr4TgyUbZm6qCs8e/G:O7eNAYb92Ub8T5geL

Malware Config

Signatures

  • Expiro, m0yv

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

  • Expiro payload 3 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.

  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b173b03e0988654a331c46e31e2438115d34fc57a7550a66aee784d1e74300d3.exe
    "C:\Users\Admin\AppData\Local\Temp\b173b03e0988654a331c46e31e2438115d34fc57a7550a66aee784d1e74300d3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1724 -s 144
      2⤵
      • Program crash
      PID:2356

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/1724-0-0x000000000031B000-0x00000000003AF000-memory.dmp

    Filesize

    592KB

  • memory/1724-1-0x00000000002A0000-0x00000000003AF000-memory.dmp

    Filesize

    1.1MB

  • memory/1724-2-0x000000000031B000-0x00000000003AF000-memory.dmp

    Filesize

    592KB