Analysis
- max time kernel
150s - max time network
151s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 19:40
General
- Target SecuriteInfo.com.Variant.Symmi.95363.32201.15435.exe
- Size 2.5MB
- Sample201109-2nrfp7kmpn
- SHA256 f10da3dca6e87216cef5c1ca2e2e985a9f4a5da295bccbd09e9893c40bdb9684
Score
10/10
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
- ServiceHost packer 5 IoCs
Detects ServiceHost packer used for .NET malware
- Executes dropped EXE 1 IoCs
- Checks BIOS information in registry 2 TTPs 4 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Deletes itself 1 IoCs
- Checks whether UAC is enabled 1 TTPs 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 15 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Symmi.95363.32201.15435.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Symmi.95363.32201.15435.exe"1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
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C:\ProgramData\ErrorResponder\errorResponder.exeC:\ProgramData\ErrorResponder\errorResponder.exe "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Symmi.95363.32201.15435.exe" ensgJJ2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Checks BIOS information in registry
- Deletes itself
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\secinit.exeC:\ProgramData\ErrorResponder\errorResponder.exe3⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1924 -s 3364⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/196-4-0x000000003FD80000-0x0000000040410000-memory.dmp
memory/1116-7-0x0000000004D20000-0x0000000004D21000-memory.dmp
memory/1116-13-0x0000000005720000-0x0000000005721000-memory.dmp
memory/1924-5-0x0000000002EF0000-0x0000000002EF1000-memory.dmp
memory/2432-0-0x000000003F210000-0x000000003F8A0000-memory.dmp