Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    21-06-2024 23:04

General

  • Target

    Nitro Generator.exe

  • Size

    77KB

  • MD5

    8bbf53c41f2625a3c4e608ad13cb2c55

  • SHA1

    3335287d42f6e674eb1d4465949e02d262bb8391

  • SHA256

    ae5a9dec7624bf30d8b8f9659dd6969973969a88933790fedff2f5717745e299

  • SHA512

    9c568dff7a8cbeb26997fdb17c7cc1c2a1fc3d060cf83fdbf1a5b994da8e04cf2e03a2f6a5406005d8edd77d3a497617f89c9cc2575b76c0ac0f0ceef97b60ec

  • SSDEEP

    1536:KRF0u1pqSjRVjnnsT5zYYPwRIH7I7AFbgwOLYP0og1KMwEnO8oBoRF:Kz0KprsT5zYY+IH7I7AFbgTK0omFjnOI

Malware Config

Extracted

Family

xworm

C2

runderscore00-25851.portmap.host:25851

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    USB.exe

Signatures

  • Detect Xworm Payload 5 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 1 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).

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Nitro Generator.exe
    "C:\Users\Admin\AppData\Local\Temp\Nitro Generator.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2988
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2892
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {54A29E1F-4D0A-43FE-9CD1-5761805AE9EE} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2504
    • C:\ProgramData\svchost
      C:\ProgramData\svchost
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2648
    • C:\ProgramData\svchost
      C:\ProgramData\svchost
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:592
    • C:\ProgramData\svchost
      C:\ProgramData\svchost
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:576

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\svchost

    Filesize

    77KB

    MD5

    8bbf53c41f2625a3c4e608ad13cb2c55

    SHA1

    3335287d42f6e674eb1d4465949e02d262bb8391

    SHA256

    ae5a9dec7624bf30d8b8f9659dd6969973969a88933790fedff2f5717745e299

    SHA512

    9c568dff7a8cbeb26997fdb17c7cc1c2a1fc3d060cf83fdbf1a5b994da8e04cf2e03a2f6a5406005d8edd77d3a497617f89c9cc2575b76c0ac0f0ceef97b60ec

  • memory/576-16-0x0000000000F20000-0x0000000000F3A000-memory.dmp

    Filesize

    104KB

  • memory/592-14-0x0000000000060000-0x000000000007A000-memory.dmp

    Filesize

    104KB

  • memory/2648-9-0x0000000000FA0000-0x0000000000FBA000-memory.dmp

    Filesize

    104KB

  • memory/2988-0-0x000007FEF50F3000-0x000007FEF50F4000-memory.dmp

    Filesize

    4KB

  • memory/2988-1-0x0000000000CB0000-0x0000000000CCA000-memory.dmp

    Filesize

    104KB

  • memory/2988-2-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

    Filesize

    9.9MB

  • memory/2988-10-0x000007FEF50F3000-0x000007FEF50F4000-memory.dmp

    Filesize

    4KB

  • memory/2988-11-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

    Filesize

    9.9MB