Analysis
- max time kernel
196s - max time network
202s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
24/11/2022, 23:16
General
- Target file.exe
- Size 1.3MB
- Sample221124-28414aab9x
- SHA256 a28d317b36faebb05bb92bb16f636f0a47d25befd99b81ae66bc1f2f11998fc2
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
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-LR9OV.tmp\is-3COLQ.tmp"C:\Users\Admin\AppData\Local\Temp\is-LR9OV.tmp\is-3COLQ.tmp" /SL4 $B01BA "C:\Users\Admin\AppData\Local\Temp\file.exe" 1086244 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
-
C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\ifnbcd.exe4⤵
- Executes dropped EXE
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
PrintFolders.exe
PrintFolders.exe
is-3COLQ.tmp
is-3COLQ.tmp
_iscrypt.dll
ifnbcd.exe
ifnbcd.exe
memory/1948-139-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1948-132-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1948-134-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2136-145-0x0000000000400000-0x00000000013B4000-memory.dmp
memory/2136-143-0x0000000000400000-0x00000000013B4000-memory.dmp
memory/2136-144-0x0000000000400000-0x00000000013B4000-memory.dmp
memory/2136-149-0x0000000000400000-0x00000000013B4000-memory.dmp
memory/2136-150-0x0000000010000000-0x000000001001B000-memory.dmp