Analysis
- max time kernel
146s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
22/06/2026, 18:16
General
- Target avast_one_free.exe
- Size 1.7MB
- Sample260622-wwjxhafv21
- SHA256 5434753051d22586c7047c2a22bc36204dcef167c0bf23ac89b2a2d8d26bafd1
Score
6/10
Malware Config
Signatures
- Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 1 IoCs
- 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 5 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 10 IoCs
- Suspicious use of FindShellTrayWindow 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\avast_one_free.exe"C:\Users\Admin\AppData\Local\Temp\avast_one_free.exe"1⤵
- Writes to the Master Boot Record (MBR)
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Windows\Temp\asw-89e7c262-f46d-4909-9624-992cf24bd968\common\icarus.exeC:\Windows\Temp\asw-89e7c262-f46d-4909-9624-992cf24bd968\common\icarus.exe /icarus-info-path:C:\Windows\Temp\asw-89e7c262-f46d-4909-9624-992cf24bd968\icarus-info.xml /install /sssid:34442⤵
- Writes to the Master Boot Record (MBR)
- Executes dropped EXE
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\Temp\asw-89e7c262-f46d-4909-9624-992cf24bd968\common\icarus_ui.exeC:\Windows\Temp\asw-89e7c262-f46d-4909-9624-992cf24bd968\common\icarus_ui.exe /sssid:3444 /er_master:master_ep_6735c9b0-ce82-4cec-8898-947b1ff908ce /er_ui:ui_ep_ef621ee8-b6b1-4d13-b345-23e9088988eb3⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
-
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
sfx.log
bug_report.exe
icarus.exe
icarus_ui.exe
bug_report.exe
dump_process.exe
icarus.exe
icarus_mod.dll
icarus_ui.exe
product-def.xml
product-info.xml
setupui.cont
ecoo.edat
epps.edat
eref.edat
giet.edat
icarus-info.xml