Analysis
- max time kernel
180s - max time network
189s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
02/12/2022, 22:47
General
- Target file.exe
- Size 2.1MB
- Sample221202-2qhedafa71
- SHA256 1c58b9648d8d866f0569fdbfa431fc3c9e2c46ae099f1216da5b5d4e61b281dc
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-6KTQP.tmp\is-S6RBC.tmp"C:\Users\Admin\AppData\Local\Temp\is-6KTQP.tmp\is-S6RBC.tmp" /SL4 $701B2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1942842 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\{6eb576c0-6208-11ed-9190-806e6f6e6963}\iW2JG.exe4⤵
- Executes dropped EXE
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
PrintFolders.exe
PrintFolders.exe
_iscrypt.dll
is-S6RBC.tmp
is-S6RBC.tmp
iW2JG.exe
iW2JG.exe
memory/116-148-0x0000000000400000-0x0000000001552000-memory.dmp
memory/116-142-0x0000000000400000-0x0000000001552000-memory.dmp
memory/116-143-0x0000000000400000-0x0000000001552000-memory.dmp
memory/116-144-0x0000000000400000-0x0000000001552000-memory.dmp
memory/116-149-0x0000000000400000-0x0000000001552000-memory.dmp
memory/2708-137-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2708-132-0x0000000000400000-0x0000000000413000-memory.dmp