Analysis
- max time kernel
145s - max time network
130s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
25/05/2024, 00:27
General
- Target SolaraBootstrapper.exe
- Size 13KB
- Sample240525-arvmjsgb5z
- SHA256 a7fecfc225dfdd4e14dcd4d1b4ba1b9f8e4d1984f1cdd8cda3a9987e5d53c239
Malware Config
Signatures
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 5 IoCs
- Themida packer 8 IoCs
Detects Themida, an advanced Windows software protection system.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe"C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe"2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Microsoft.Web.WebView2.Core.dll
Microsoft.Web.WebView2.Wpf.dll
.nycrc
.eslintrc
.nycrc
LICENSE
VCRUNTIME140.dll
WebView2Loader.dll
Wpf.Ui.dll
cd57e4c171d6e8f5ea8b8f824a6a7316.dll
cd57e4c171d6e8f5ea8b8f824a6a7316.exe
libcurl.dll
zlib1.dll
memory/2640-1481-0x000001933CD50000-0x000001933CD5E000-memory.dmp
memory/2640-1492-0x0000000180000000-0x0000000180B28000-memory.dmp
memory/2640-1476-0x00007FFC35130000-0x00007FFC35BF1000-memory.dmp
memory/2640-1477-0x0000019356EE0000-0x0000019356F9A000-memory.dmp
memory/2640-1527-0x0000000180000000-0x0000000180B28000-memory.dmp
memory/2640-1525-0x0000000180000000-0x0000000180B28000-memory.dmp
memory/2640-1472-0x000001933B080000-0x000001933B09A000-memory.dmp
memory/2640-1479-0x0000019356FA0000-0x000001935701E000-memory.dmp
memory/2640-1471-0x00007FFC35133000-0x00007FFC35135000-memory.dmp
memory/2640-1504-0x00007FFC35130000-0x00007FFC35BF1000-memory.dmp
memory/2640-1503-0x00007FFC35133000-0x00007FFC35135000-memory.dmp
memory/2640-1499-0x0000000180000000-0x0000000180B28000-memory.dmp
memory/2640-1500-0x00007FFC41AF0000-0x00007FFC41B14000-memory.dmp
memory/2640-1475-0x0000019357270000-0x00000193577AC000-memory.dmp
memory/2640-1493-0x0000000180000000-0x0000000180B28000-memory.dmp
memory/2640-1494-0x0000000180000000-0x0000000180B28000-memory.dmp
memory/2640-1495-0x0000000180000000-0x0000000180B28000-memory.dmp
memory/2640-1496-0x0000019357260000-0x0000019357268000-memory.dmp
memory/2640-1497-0x000001935BEC0000-0x000001935BEF8000-memory.dmp
memory/2640-1498-0x000001935BE90000-0x000001935BE9E000-memory.dmp
memory/3500-1-0x0000000000130000-0x000000000013A000-memory.dmp
memory/3500-2-0x0000000002470000-0x000000000247A000-memory.dmp
memory/3500-3-0x00000000750A0000-0x0000000075850000-memory.dmp
memory/3500-5-0x0000000005600000-0x0000000005612000-memory.dmp
memory/3500-0-0x00000000750AE000-0x00000000750AF000-memory.dmp
memory/3500-1473-0x00000000750A0000-0x0000000075850000-memory.dmp