Analysis
- max time kernel
68s - max time network
136s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
02/11/2022, 15:14
General
- Target file.exe
- Size 4.7MB
- Sample221102-sma2fshgf3
- SHA256 b9c544f7eef189e45cd0cb1cf50d9d1e163ce810c2b57d111eaf8cd417be24f7
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.
- Loads dropped DLL 3 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Themida packer 11 IoCs
Detects Themida, an advanced Windows software protection system.
- Accesses 2FA software files, possible credential harvesting 2 TTPs
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 63⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
sqlite3.dll
memory/2804-140-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-139-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-142-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-143-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-144-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-145-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-132-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-141-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-138-0x0000000077440000-0x00000000775E3000-memory.dmp
memory/2804-149-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-150-0x0000000077440000-0x00000000775E3000-memory.dmp
memory/2804-133-0x0000000000880000-0x00000000012AA000-memory.dmp
memory/2804-154-0x0000000077440000-0x00000000775E3000-memory.dmp
memory/2804-153-0x0000000000880000-0x00000000012AA000-memory.dmp