Analysis
- max time kernel
147s - max time network
150s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
21/06/2024, 23:04
General
- Target Nitro Generator.exe
- Size 77KB
- Sample240621-22knwaybpl
- SHA256 ae5a9dec7624bf30d8b8f9659dd6969973969a88933790fedff2f5717745e299
Malware Config
Extracted
-
xworm
-
runderscore00-25851.portmap.host:25851
-
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
-
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
-
-
C:\ProgramData\svchostC:\ProgramData\svchost1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\ProgramData\svchostC:\ProgramData\svchost1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\ProgramData\svchostC:\ProgramData\svchost1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
svchost
svchost.log
memory/1296-0-0x00007FFD2F653000-0x00007FFD2F654000-memory.dmp
memory/1296-1-0x0000000000D10000-0x0000000000D2A000-memory.dmp
memory/1296-2-0x00007FFD2F650000-0x00007FFD3003C000-memory.dmp
memory/1296-11-0x00007FFD2F653000-0x00007FFD2F654000-memory.dmp
memory/1296-12-0x00007FFD2F650000-0x00007FFD3003C000-memory.dmp
memory/2584-8-0x00007FFD2F650000-0x00007FFD3003C000-memory.dmp
memory/2584-10-0x00007FFD2F650000-0x00007FFD3003C000-memory.dmp