Analysis
- max time kernel
141s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
13/06/2024, 21:51
General
- Target Shellbag anylizer.exe
- Size 69KB
- Sample240613-1q1ehs1gkd
- SHA256 8f2d3eeab5e5d807acff4be9b7d6b41340f0c8a891baa094543d10e65ccec7f2
Malware Config
Extracted
-
xworm
-
Install_directory
%Temp%
-
install_file
svchost.exe
-
pastebin_url
https://pastebin.com/raw/qEVZXv39
Signatures
- Contains code to disable Windows Defender 1 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
- Detect Xworm Payload 1 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.
- Disables Task Manager via registry modification
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Drops startup file 2 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 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 8 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
- System policy modification 1 TTPs 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"1⤵
- UAC bypass
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
-
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\Shellbag anylizer.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 'Shellbag anylizer.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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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\svchost.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 'svchost.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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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=3680 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
Loading Replay Monitor...
Downloads
powershell.exe.log
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
__PSScriptPolicyTest_prnszzqo.h5u.ps1
memory/4268-1-0x00000000003F0000-0x0000000000408000-memory.dmp
memory/4268-2-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp
memory/4268-63-0x0000000000A30000-0x0000000000A3E000-memory.dmp
memory/4268-0-0x00007FFDB9F93000-0x00007FFDB9F95000-memory.dmp
memory/4268-62-0x0000000000AF0000-0x0000000000AFC000-memory.dmp
memory/4268-60-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp
memory/4268-58-0x00007FFDB9F93000-0x00007FFDB9F95000-memory.dmp
memory/5020-4-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp
memory/5020-20-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp
memory/5020-17-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp
memory/5020-16-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp
memory/5020-12-0x000001ECF9A10000-0x000001ECF9A32000-memory.dmp
memory/5020-5-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp
memory/5020-3-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp