Analysis
- max time kernel
190s - max time network
199s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
08/12/2022, 10:25
General
- Target f5de575adbadc2335048186648831bd335e5b66d8761ea0126851fbc98d599d5.exe
- Size 3.5MB
- Sample221208-mf5plahf62
- SHA256 f5de575adbadc2335048186648831bd335e5b66d8761ea0126851fbc98d599d5
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\f5de575adbadc2335048186648831bd335e5b66d8761ea0126851fbc98d599d5.exe"C:\Users\Admin\AppData\Local\Temp\f5de575adbadc2335048186648831bd335e5b66d8761ea0126851fbc98d599d5.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-0L3O0.tmp\is-N0GM0.tmp"C:\Users\Admin\AppData\Local\Temp\is-0L3O0.tmp\is-N0GM0.tmp" /SL4 $B014C "C:\Users\Admin\AppData\Local\Temp\f5de575adbadc2335048186648831bd335e5b66d8761ea0126851fbc98d599d5.exe" 3460057 962562⤵
- 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}\rdtbjTfoql5C.exe4⤵
- Executes dropped EXE
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
PrintFolders.exe
PrintFolders.exe
is-N0GM0.tmp
is-N0GM0.tmp
_iscrypt.dll
rdtbjTfoql5C.exe
rdtbjTfoql5C.exe
memory/2504-137-0x0000000000400000-0x000000000041E000-memory.dmp
memory/2504-132-0x0000000000400000-0x000000000041E000-memory.dmp
memory/4388-142-0x0000000000400000-0x0000000001810000-memory.dmp
memory/4388-143-0x0000000000400000-0x0000000001810000-memory.dmp
memory/4388-144-0x0000000000400000-0x0000000001810000-memory.dmp
memory/4388-148-0x0000000000400000-0x0000000001810000-memory.dmp
memory/4388-149-0x0000000010000000-0x000000001001B000-memory.dmp