Analysis
- max time kernel
90s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
29/12/2022, 17:40
General
- Target file.exe
- Size 1.8MB
- Sample221229-v8vzvsdf42
- SHA256 a7dbbe38f440004310811a5355f7d69aaeddcf45df7f79e6bc3caf62ddf31e61
Score
8/10
Malware Config
Signatures
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Drops file in Program Files directory 17 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-NJFVP.tmp\is-3TONA.tmp"C:\Users\Admin\AppData\Local\Temp\is-NJFVP.tmp\is-3TONA.tmp" /SL4 $A003E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1641911 1664002⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\Split Files\SplitFiles124.exe"C:\Program Files (x86)\Split Files\SplitFiles124.exe"3⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
SplitFiles124.exe
SplitFiles124.exe
is-3TONA.tmp
is-3TONA.tmp
_iscrypt.dll
memory/376-142-0x0000000000400000-0x000000000152C000-memory.dmp
memory/376-143-0x0000000000400000-0x000000000152C000-memory.dmp
memory/4916-132-0x0000000000400000-0x000000000042F000-memory.dmp
memory/4916-134-0x0000000000400000-0x000000000042F000-memory.dmp
memory/4916-144-0x0000000000400000-0x000000000042F000-memory.dmp