Analysis
- max time kernel
142s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
22/11/2022, 09:01
General
- Target file.exe
- Size 1.4MB
- Sample221122-kywtasbe3x
- SHA256 af762c1ee037a116c19155bd192d92495a3c1d778deaa4c6380298a4636faf0c
Score
10/10
Malware Config
Extracted
Family
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nymaim
C2
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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-UJPFF.tmp\is-SDIU2.tmp"C:\Users\Admin\AppData\Local\Temp\is-UJPFF.tmp\is-SDIU2.tmp" /SL4 $A007C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1242549 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}\BlcaEZ.exe4⤵
- Executes dropped EXE
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-
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
PrintFolders.exe
PrintFolders.exe
_iscrypt.dll
is-SDIU2.tmp
is-SDIU2.tmp
BlcaEZ.exe
BlcaEZ.exe
memory/204-142-0x0000000000400000-0x00000000013AA000-memory.dmp
memory/204-143-0x0000000000400000-0x00000000013AA000-memory.dmp
memory/204-147-0x0000000000400000-0x00000000013AA000-memory.dmp
memory/4060-132-0x0000000000400000-0x0000000000413000-memory.dmp
memory/4060-138-0x0000000000400000-0x0000000000413000-memory.dmp