Analysis
- max time kernel
299s - max time network
114s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
27/10/2026, 15:40
General
- Target avast_one_free (1).exe
- Size 1.7MB
- Sample261027-s4dhxae14p
- SHA256 29625c990f8181a3fe7e8d6cd1a20bd9ec93ed4b647af23a010ea616d58c20b6
Score
6/10
Malware Config
Signatures
- Checks for any installed AV software in registry 1 TTPs 4 IoCs
- Writes to the Master Boot Record (MBR) 1 TTPs 4 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- Executes dropped EXE 4 IoCs
- Loads dropped DLL 3 IoCs
- Direct Volume Access: Opens a physical disk for reading 1 TTPs 5 IoCs
Opens a raw handle to a physical disk, which bypasses file system access controls and is used for disk inspection, anti-VM checks and privilege checks.
- Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Checks processor information in registry 2 TTPs 9 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies registry class 4 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 28 IoCs
- Suspicious use of FindShellTrayWindow 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 4 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
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C:\Users\Admin\AppData\Local\Temp\avast_one_free (1).exe"C:\Users\Admin\AppData\Local\Temp\avast_one_free (1).exe"1⤵
- Writes to the Master Boot Record (MBR)
- Loads dropped DLL
- Direct Volume Access: Opens a physical disk for reading
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\common\icarus.exeC:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\common\icarus.exe /icarus-info-path:C:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\icarus-info.xml /install /sssid:61082⤵
- Checks for any installed AV software in registry
- Writes to the Master Boot Record (MBR)
- Executes dropped EXE
- Direct Volume Access: Opens a physical disk for reading
- Reads the TCP/IP host and domain name from the registry
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\common\icarus_ui.exeC:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\common\icarus_ui.exe /sssid:6108 /er_master:master_ep_6e8a3c30-fc3b-4ccc-98f1-842389c6a0ae /er_ui:ui_ep_2b817751-da4d-4571-9552-9c0e874b6ec53⤵
- Executes dropped EXE
- Direct Volume Access: Opens a physical disk for reading
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
-
-
C:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\avast-suite\icarus.exeC:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\avast-suite\icarus.exe /sssid:6108 /er_master:master_ep_6e8a3c30-fc3b-4ccc-98f1-842389c6a0ae /er_ui:ui_ep_2b817751-da4d-4571-9552-9c0e874b6ec5 /er_slave:avast-suite_slave_ep_2294f9fc-a7ed-4e98-89f9-2c6c3a179154 /slave:avast-suite3⤵
- Checks for any installed AV software in registry
- Writes to the Master Boot Record (MBR)
- Executes dropped EXE
- Loads dropped DLL
- Direct Volume Access: Opens a physical disk for reading
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\avast-av-vps\icarus.exeC:\Windows\Temp\asw-0a19c8df-a0df-4f14-9b4a-9b20d7c5b47c\avast-av-vps\icarus.exe /sssid:6108 /er_master:master_ep_6e8a3c30-fc3b-4ccc-98f1-842389c6a0ae /er_ui:ui_ep_2b817751-da4d-4571-9552-9c0e874b6ec5 /er_slave:avast-av-vps_slave_ep_f9b3aa1f-5c44-4e36-9adf-297ad1580ccc /slave:avast-av-vps3⤵
- Writes to the Master Boot Record (MBR)
- Executes dropped EXE
- Loads dropped DLL
- Direct Volume Access: Opens a physical disk for reading
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k GPSvcGroup1⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
icarus.log
icarus.log
icarus.log
reporting.log
reporting.log
sfx.log
sfx.log
sui.log
temporary_proxy.ini
icarus_product.dll
product-def.xml
product-info.xml
policy.def
policy.def
policy.def
icarus_product.dll
bug_report.exe
dump_process.exe
icarus.exe
icarus_mod.dll
icarus_ui.exe
product-def.xml
product-info.xml
setupui.cont
eclk.edat
ecoo.edat
epps.edat
giet.edat
icarus-info.xml