Analysis
- max time kernel
175s - max time network
187s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
24/11/2022, 12:16
General
- Target file.exe
- Size 1.3MB
- Sample221124-pff3cach46
- SHA256 ad21009b2199eae2f3c9c7535665ea900011fa5a6ec237f3cc14b9d14cf0befa
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-I6MD2.tmp\is-N4RB7.tmp"C:\Users\Admin\AppData\Local\Temp\is-I6MD2.tmp\is-N4RB7.tmp" /SL4 $9004E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1086498 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\{6cebb340-6208-11ed-bf50-806e6f6e6963}\IMSpTRp9su.exe4⤵
- Executes dropped EXE
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
PrintFolders.exe
PrintFolders.exe
_iscrypt.dll
is-N4RB7.tmp
is-N4RB7.tmp
IMSpTRp9su.exe
IMSpTRp9su.exe
memory/2552-132-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2552-134-0x0000000000400000-0x0000000000413000-memory.dmp
memory/4356-142-0x0000000000400000-0x0000000001372000-memory.dmp
memory/4356-143-0x0000000000400000-0x0000000001372000-memory.dmp
memory/4356-147-0x0000000000400000-0x0000000001372000-memory.dmp
memory/4356-148-0x0000000010000000-0x000000001001B000-memory.dmp