Analysis
- max time kernel
149s - max time network
149s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
23/07/2026, 18:25
General
- Target avast_free_antivirus_setup_online.exe
- Size 245KB
- Sample260723-w23a2ahn6v
- SHA256 6be180ea9a978907b1f39e54a6360404a094d59c21e4ebb1fcb456aef0ff4859
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 5 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- Executes dropped EXE 5 IoCs
- Loads dropped DLL 4 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 2 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 5 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\avast_free_antivirus_setup_online.exe"C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe"1⤵
- Writes to the Master Boot Record (MBR)
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Windows\Temp\asw.e97946b9237ac7ee\avast_free_antivirus_online_setup.exe"C:\Windows\Temp\asw.e97946b9237ac7ee\avast_free_antivirus_online_setup.exe" /ga_clientid:2c441530-be95-404b-a7e2-a7ad69ecac4d /edat_dir:C:\Windows\Temp\asw.e97946b9237ac7ee /geo:GB2⤵
- Writes to the Master Boot Record (MBR)
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Windows\Temp\asw-2c441530-be95-404b-a7e2-a7ad69ecac4d\common\icarus.exeC:\Windows\Temp\asw-2c441530-be95-404b-a7e2-a7ad69ecac4d\common\icarus.exe /icarus-info-path:C:\Windows\Temp\asw-2c441530-be95-404b-a7e2-a7ad69ecac4d\icarus-info.xml /install /edat_dir:C:\Windows\Temp\asw.e97946b9237ac7ee /geo:GB /track-guid:2c441530-be95-404b-a7e2-a7ad69ecac4d /sssid:43843⤵
- 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-2c441530-be95-404b-a7e2-a7ad69ecac4d\common\icarus_ui.exeC:\Windows\Temp\asw-2c441530-be95-404b-a7e2-a7ad69ecac4d\common\icarus_ui.exe /edat_dir:C:\Windows\Temp\asw.e97946b9237ac7ee /geo:GB /track-guid:2c441530-be95-404b-a7e2-a7ad69ecac4d /sssid:4384 /er_master:master_ep_66fff77e-8e70-4731-b24b-aed9499d6711 /er_ui:ui_ep_dc6b3849-6ee1-460c-bb35-fca53b6a4db94⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
-
-
C:\Windows\Temp\asw-2c441530-be95-404b-a7e2-a7ad69ecac4d\avast-av-vps\icarus.exeC:\Windows\Temp\asw-2c441530-be95-404b-a7e2-a7ad69ecac4d\avast-av-vps\icarus.exe /edat_dir:C:\Windows\Temp\asw.e97946b9237ac7ee /geo:GB /track-guid:2c441530-be95-404b-a7e2-a7ad69ecac4d /sssid:4384 /er_master:master_ep_66fff77e-8e70-4731-b24b-aed9499d6711 /er_ui:ui_ep_dc6b3849-6ee1-460c-bb35-fca53b6a4db9 /er_slave:avast-av-vps_slave_ep_c6602145-ccc9-47ff-a27d-4354761389c6 /slave:avast-av-vps4⤵
- Writes to the Master Boot Record (MBR)
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\Temp\asw-2c441530-be95-404b-a7e2-a7ad69ecac4d\avast-av\icarus.exeC:\Windows\Temp\asw-2c441530-be95-404b-a7e2-a7ad69ecac4d\avast-av\icarus.exe /edat_dir:C:\Windows\Temp\asw.e97946b9237ac7ee /geo:GB /track-guid:2c441530-be95-404b-a7e2-a7ad69ecac4d /sssid:4384 /er_master:master_ep_66fff77e-8e70-4731-b24b-aed9499d6711 /er_ui:ui_ep_dc6b3849-6ee1-460c-bb35-fca53b6a4db9 /er_slave:avast-av_slave_ep_8fbf9948-14ee-4426-885b-ce49bfcff193 /slave:avast-av4⤵
- Checks for any installed AV software in registry
- Writes to the Master Boot Record (MBR)
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v16
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Downloads
icarus.log
icarus.log
icarus.log
icarus.log
icarus.log
icarus.log
sfx.log
sui.log
sui.log
temporary_proxy.ini
config.def
icarus_product.dll
product-def.xml
product-info.xml
config.def
edition.edat
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
gpid.edat
gpud.edat
icarus-info.xml
package.edat
skup.edat
avast_free_antivirus_online_setup.exe