Analysis
- max time kernel
143s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
12/12/2022, 01:01
General
- Target file.exe
- Size 2.3MB
- Sample221212-bc8rasaa92
- SHA256 3972f6c03f1bcf2713e8483c64c8f6e5baa0a8513e42957e84dad13ae762beaf
Malware Config
Extracted
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nymaim
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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\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-DCH5K.tmp\is-DJ82J.tmp"C:\Users\Admin\AppData\Local\Temp\is-DCH5K.tmp\is-DJ82J.tmp" /SL4 $90042 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2120607 1715202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\PrintFolders\nvFolders.exe"C:\Program Files (x86)\PrintFolders\nvFolders.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}\H4tCuPVDrsG.exe4⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
nvFolders.exe
nvFolders.exe
_iscrypt.dll
is-DJ82J.tmp
is-DJ82J.tmp
H4tCuPVDrsG.exe
H4tCuPVDrsG.exe
memory/3248-143-0x0000000000400000-0x0000000001571000-memory.dmp
memory/3248-142-0x0000000000400000-0x0000000001571000-memory.dmp
memory/3248-144-0x0000000000400000-0x0000000001571000-memory.dmp
memory/3248-148-0x0000000000400000-0x0000000001571000-memory.dmp
memory/4528-138-0x0000000000400000-0x0000000000430000-memory.dmp
memory/4528-132-0x0000000000400000-0x0000000000430000-memory.dmp