Analysis
- max time kernel
151s - max time network
157s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
25/05/2024, 08:11
General
- Target start.exe
- Size 45KB
- Sample240525-j3lnfsbe28
- SHA256 b68fc7ea0cfca083aa1a0485d4410db801ed1105bc8fe33fc258e7bef56894e9
Malware Config
Extracted
-
xworm
-
5.0
-
0.tcp.eu.ngrok.io:11614
-
d3YsjeOcB3LIFyRk
-
Install_directory
%AppData%
-
install_file
svhost.exe
Signatures
- Detect Xworm Payload 2 IoCs
- UAC bypass 3 TTPs 1 IoCs
- Xworm
Xworm is a remote access trojan written in C#.
- Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
- Sets file execution options in registry 2 TTPs 4 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Drops startup file 2 IoCs
- Executes dropped EXE 6 IoCs
- UPX packed file 12 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Adds Run key to start application 2 TTPs 2 IoCs
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 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.
- Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 10 IoCs
- Suspicious use of SetWindowsHookEx 3 IoCs
- Suspicious use of WriteProcessMemory 19 IoCs
- System policy modification 1 TTPs 3 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\start.exe"C:\Users\Admin\AppData\Local\Temp\start.exe"1⤵
- Checks computer location settings
- 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\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\start.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'start.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\svhost.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\AppData\Roaming\svhost.exe"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\siojjg.exe"C:\Users\Admin\AppData\Local\Temp\siojjg.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\RarSFX0\hui.exe"C:\Users\Admin\AppData\Local\Temp\RarSFX0\hui.exe" huy3⤵
- Executes dropped EXE
-
-
-
C:\Users\Admin\AppData\Local\Temp\swdjvr.exe"C:\Users\Admin\AppData\Local\Temp\swdjvr.exe"2⤵
- UAC bypass
- Sets file execution options in registry
- Executes dropped EXE
- Adds Run key to start application
- Checks whether UAC is enabled
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- System policy modification
-
-
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3948 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:81⤵
-
C:\Users\Admin\AppData\Local\Temp\swdjvr.exeC:\Users\Admin\AppData\Local\Temp\swdjvr.exe explorer.exe1⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
-
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Scheduled Task/Job
1Replay Monitor
Loading Replay Monitor...
Downloads
powershell.exe.log
svhost.exe.log
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
hui.exe
xui2.cur
__PSScriptPolicyTest_cvii0r4j.vbo.ps1
siojjg.exe
swdjvr.exe
svhost.exe
memory/3080-60-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp
memory/3080-0-0x00007FFE5FD43000-0x00007FFE5FD45000-memory.dmp
memory/3080-1-0x0000000000410000-0x0000000000422000-memory.dmp
memory/3080-2-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp
memory/3080-59-0x00007FFE5FD43000-0x00007FFE5FD45000-memory.dmp
memory/3324-147-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-181-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-267-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-248-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-225-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-200-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-95-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-158-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-136-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3324-116-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/3856-83-0x0000000000990000-0x0000000000998000-memory.dmp
memory/4428-99-0x0000000000400000-0x00000000006D8000-memory.dmp
memory/4548-16-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp
memory/4548-20-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp
memory/4548-15-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp
memory/4548-3-0x00000150AA800000-0x00000150AA822000-memory.dmp
memory/4548-4-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp
memory/4548-17-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp
memory/4548-14-0x00007FFE5FD40000-0x00007FFE60801000-memory.dmp