Analysis
- max time kernel
150s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
22/11/2022, 03:46
General
- Target file.exe
- Size 1.4MB
- Sample221122-ebmn8ahd53
- SHA256 406f24f986f67108fa891d89703abd05acd1253bb37f2a9e7532a4c58d44223c
Malware Config
Extracted
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nymaim
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45.139.105.171
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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-EDDAM.tmp\is-32MJE.tmp"C:\Users\Admin\AppData\Local\Temp\is-EDDAM.tmp\is-32MJE.tmp" /SL4 $801B6 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1225524 517122⤵
- 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\PrintFolders.exe"C:\Program Files (x86)\PrintFolders\PrintFolders.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\rTTTzTj9ajfNN.exe4⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
PrintFolders.exe
PrintFolders.exe
is-32MJE.tmp
is-32MJE.tmp
_iscrypt.dll
rTTTzTj9ajfNN.exe
rTTTzTj9ajfNN.exe
memory/3992-138-0x0000000000400000-0x0000000000413000-memory.dmp
memory/3992-132-0x0000000000400000-0x0000000000413000-memory.dmp
memory/5076-142-0x0000000000400000-0x00000000013AA000-memory.dmp
memory/5076-143-0x0000000000400000-0x00000000013AA000-memory.dmp
memory/5076-147-0x0000000000400000-0x00000000013AA000-memory.dmp
memory/5076-148-0x0000000010000000-0x000000001001B000-memory.dmp