Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/08/2024, 16:59

General

  • Target
    fix/x86_64-w64-ranlib.exe
  • Size 240KB
  • Sample240826-vhsrtawepj
  • SHA256 546c34c2782216278a8273d3c9d3a954a980c7c2c7be220914aefe446fe94fd8
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Extracted

Family
  • lumma

C2
  • https://froytnewqowv.shop/api

Signatures

  • Lumma Stealer, LummaC

    Lumma or LummaC is an infostealer written in C++ first seen in August 2022.

  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 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 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fix\x86_64-w64-ranlib.exe
    "C:\Users\Admin\AppData\Local\Temp\fix\x86_64-w64-ranlib.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2996
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3844
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 620
        3⤵
        • Program crash
        PID:3228
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 1008
        3⤵
        • Program crash
        PID:3120
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3844 -ip 3844
    1⤵
      PID:1204
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3844 -ip 3844
      1⤵
        PID:3524

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            d3d9x.dll

            • Path C:\Users\Admin\AppData\Roaming\d3d9x.dll
            • Size 489KB
            • SHA256 13ffba04ad8898543ec8a427a6d56064080a937ce390ea47056f747e6084bbf3
            • MD5 SHA1 SHA512 SSDEEP

            memory/2996-7-0x0000000077161000-0x0000000077281000-memory.dmp

            memory/3844-11-0x0000000000400000-0x0000000000451000-memory.dmp

            memory/3844-13-0x0000000000400000-0x0000000000451000-memory.dmp

            memory/3844-14-0x0000000000400000-0x0000000000451000-memory.dmp

            memory/3844-15-0x0000000000400000-0x0000000000451000-memory.dmp