Analysis
- max time kernel
204s - max time network
208s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
07/12/2022, 07:46
General
- Target file.exe
- Size 2.2MB
- Sample221207-jly78abc7y
- SHA256 2391057f7205a2d10135b6f39cdebf60ba79d5bd2bbc55293cc31a7d8b34f0e3
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
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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-C5IAU.tmp\is-QQDJ3.tmp"C:\Users\Admin\AppData\Local\Temp\is-C5IAU.tmp\is-QQDJ3.tmp" /SL4 $C006A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2054222 737282⤵
- 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\RintFolders.exe"C:\Program Files (x86)\PrintFolders\RintFolders.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}\u3dVZGA4K3EbdO.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
RintFolders.exe
RintFolders.exe
_iscrypt.dll
is-QQDJ3.tmp
is-QQDJ3.tmp
u3dVZGA4K3EbdO.exe
u3dVZGA4K3EbdO.exe
memory/3476-132-0x0000000000400000-0x0000000000418000-memory.dmp
memory/3476-134-0x0000000000400000-0x0000000000418000-memory.dmp
memory/3476-144-0x0000000000400000-0x0000000000418000-memory.dmp
memory/3996-142-0x0000000000400000-0x000000000154A000-memory.dmp
memory/3996-143-0x0000000000400000-0x000000000154A000-memory.dmp
memory/3996-148-0x0000000000400000-0x000000000154A000-memory.dmp
memory/3996-149-0x0000000010000000-0x000000001001B000-memory.dmp