Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    28/03/2026, 16:13

General

  • Target
    2026-03-28_afed85819bbe786d1c7ad957e4c4ad2c_elex_rhadamanthys_stop.exe
  • Size 2.4MB
  • Sample260328-tpde2ag17j
  • SHA256 e7fb97547515b519014a69492faad607cfe5ff3f1fbc6cb4962fc682124be8e3
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • observer

C2
  • http://5.42.64.41:1337

Signatures

  • Observer

    Observer is an infostealer written in C++.

  • Observer family
  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 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 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-03-28_afed85819bbe786d1c7ad957e4c4ad2c_elex_rhadamanthys_stop.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-03-28_afed85819bbe786d1c7ad957e4c4ad2c_elex_rhadamanthys_stop.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2352
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\AppLaunch.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1360
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 724
        3⤵
        • Program crash
        PID:4424
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1360 -ip 1360
    1⤵
      PID:388

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          memory/1360-3-0x0000000000540000-0x000000000058B000-memory.dmp

          memory/1360-11-0x0000000000540000-0x000000000058B000-memory.dmp

          memory/1360-12-0x00000000026E0000-0x000000000282D000-memory.dmp

          memory/2352-1-0x0000000000400000-0x0000000000685000-memory.dmp

          memory/2352-0-0x000000000046B000-0x000000000046C000-memory.dmp

          memory/2352-2-0x0000000000400000-0x0000000000685000-memory.dmp

          memory/2352-9-0x0000000000400000-0x0000000000685000-memory.dmp