Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-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 2 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 2 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:1296
    • 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:4128
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2584
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1912
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2260

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

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.log

    Filesize

    654B

    MD5

    16c5fce5f7230eea11598ec11ed42862

    SHA1

    75392d4824706090f5e8907eee1059349c927600

    SHA256

    87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151

    SHA512

    153edd6da59beea6cc411ed7383c32916425d6ebb65f04c65aab7c1d6b25443d143aa8449aa92149de0ad8a975f6ecaa60f9f7574536eec6b38fe5fd3a6c6adc

  • memory/1296-0-0x00007FFD2F653000-0x00007FFD2F654000-memory.dmp

    Filesize

    4KB

  • memory/1296-1-0x0000000000D10000-0x0000000000D2A000-memory.dmp

    Filesize

    104KB

  • memory/1296-2-0x00007FFD2F650000-0x00007FFD3003C000-memory.dmp

    Filesize

    9.9MB

  • memory/1296-11-0x00007FFD2F653000-0x00007FFD2F654000-memory.dmp

    Filesize

    4KB

  • memory/1296-12-0x00007FFD2F650000-0x00007FFD3003C000-memory.dmp

    Filesize

    9.9MB

  • memory/2584-8-0x00007FFD2F650000-0x00007FFD3003C000-memory.dmp

    Filesize

    9.9MB

  • memory/2584-10-0x00007FFD2F650000-0x00007FFD3003C000-memory.dmp

    Filesize

    9.9MB