Analysis
- max time kernel
176s - max time network
200s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
30/11/2022, 04:42
General
- Target 55d0d37305c0eb1abf66accbfc3da6430e8f808c6e5e9bbf5b6934298cf0ba7a.exe
- Size 2.2MB
- Sample221130-fb2ntabg5v
- SHA256 55d0d37305c0eb1abf66accbfc3da6430e8f808c6e5e9bbf5b6934298cf0ba7a
Malware Config
Extracted
-
nymaim
-
45.139.105.171
-
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\55d0d37305c0eb1abf66accbfc3da6430e8f808c6e5e9bbf5b6934298cf0ba7a.exe"C:\Users\Admin\AppData\Local\Temp\55d0d37305c0eb1abf66accbfc3da6430e8f808c6e5e9bbf5b6934298cf0ba7a.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-H0VKS.tmp\is-V5RA8.tmp"C:\Users\Admin\AppData\Local\Temp\is-H0VKS.tmp\is-V5RA8.tmp" /SL4 $E014A "C:\Users\Admin\AppData\Local\Temp\55d0d37305c0eb1abf66accbfc3da6430e8f808c6e5e9bbf5b6934298cf0ba7a.exe" 2081694 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
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\{6cebb340-6208-11ed-bf50-806e6f6e6963}\j6BSznAUsGkF.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-V5RA8.tmp
is-V5RA8.tmp
_iscrypt.dll
j6BSznAUsGkF.exe
j6BSznAUsGkF.exe
memory/1072-138-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1072-132-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2196-142-0x0000000000400000-0x000000000157B000-memory.dmp
memory/2196-143-0x0000000000400000-0x000000000157B000-memory.dmp
memory/2196-144-0x0000000000400000-0x000000000157B000-memory.dmp
memory/2196-145-0x0000000000400000-0x000000000157B000-memory.dmp
memory/2196-149-0x0000000000400000-0x000000000157B000-memory.dmp