Analysis

  • max time kernel
    9s
  • max time network
    13s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    31-05-2024 07:26

General

  • Target

    Nexus.exe

  • Size

    40KB

  • MD5

    0b677bbe363ea393d2a1152b9c9c67d7

  • SHA1

    956f8c498490c595df946763d486c9016839f1b8

  • SHA256

    960c31ec0fad0f80d726d3a91d9bbbc68c34c09a60f9381a87a589eee8814133

  • SHA512

    f24a1bb67caed2487f78be90ae728c8ed386e46ef0159c188d0b8b05e479731b5ccb1b298e8e00db0b5c8a5d145dca3d56435b95ce0099286150fa814aad11c8

  • SSDEEP

    768:36Pq4VSviT+oGQAyAqbA8K7tF5Pq9IUOMhY3/Rsq:gvSqT1HAzAVKxFk9IUOMepr

Score
10/10

Malware Config

Extracted

Family

xworm

Version

5.0

C2

85.203.4.69:1999

Mutex

nejvXraHvLYWkslH

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    csrss.exe

aes.plain

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Nexus.exe
    "C:\Users\Admin\AppData\Local\Temp\Nexus.exe"
    1⤵
    • Drops startup file
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:5000

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/5000-0-0x00007FFBD6B93000-0x00007FFBD6B95000-memory.dmp

    Filesize

    8KB

  • memory/5000-1-0x0000000000110000-0x0000000000120000-memory.dmp

    Filesize

    64KB

  • memory/5000-2-0x00007FFBD6B90000-0x00007FFBD7652000-memory.dmp

    Filesize

    10.8MB