Analysis
- max time kernel
161s - max time network
173s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
24/11/2022, 17:49
General
- Target file.exe
- Size 1.4MB
- Sample221124-webjssde3w
- SHA256 6eac41f53bccbeadfaced9deafa206131279f4e1fef0984652c3323376e1442b
Malware Config
Extracted
-
nymaim
-
45.139.105.171
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85.31.46.167
Signatures
- NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
- Executes dropped EXE 3 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 9 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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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-BQ9PC.tmp\is-J4GEJ.tmp"C:\Users\Admin\AppData\Local\Temp\is-BQ9PC.tmp\is-J4GEJ.tmp" /SL4 $A0058 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1248957 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\PrintFolders\PrintFolders.exe"C:\Program Files (x86)\PrintFolders\PrintFolders.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\9kAaPln.exe4⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
PrintFolders.exe
PrintFolders.exe
is-J4GEJ.tmp
is-J4GEJ.tmp
_iscrypt.dll
9kAaPln.exe
9kAaPln.exe
memory/2876-132-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2876-137-0x0000000000400000-0x0000000000413000-memory.dmp
memory/4852-142-0x0000000000400000-0x00000000013E6000-memory.dmp
memory/4852-143-0x0000000000400000-0x00000000013E6000-memory.dmp
memory/4852-144-0x0000000000400000-0x00000000013E6000-memory.dmp
memory/4852-148-0x0000000010000000-0x000000001001B000-memory.dmp