Analysis
- max time kernel
174s - max time network
210s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
07/12/2022, 10:32
General
- Target file.exe
- Size 2.2MB
- Sample221207-mkzddagf95
- SHA256 19ca2e40cffc20695d5da7dc94bd677401a0bd95e1e6ae8d4430ee302379e0ab
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-FH1QE.tmp\is-0RJ06.tmp"C:\Users\Admin\AppData\Local\Temp\is-FH1QE.tmp\is-0RJ06.tmp" /SL4 $801CA "C:\Users\Admin\AppData\Local\Temp\file.exe" 2061079 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
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C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\p2SY8VCu.exe4⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
RintFolders.exe
RintFolders.exe
_iscrypt.dll
is-0RJ06.tmp
is-0RJ06.tmp
p2SY8VCu.exe
p2SY8VCu.exe
memory/4068-143-0x0000000000400000-0x000000000154A000-memory.dmp
memory/4068-144-0x0000000000400000-0x000000000154A000-memory.dmp
memory/4068-148-0x0000000000400000-0x000000000154A000-memory.dmp
memory/4068-149-0x0000000010000000-0x000000001001B000-memory.dmp
memory/4656-132-0x0000000000400000-0x0000000000418000-memory.dmp
memory/4656-139-0x0000000000400000-0x0000000000418000-memory.dmp
memory/4656-134-0x0000000000400000-0x0000000000418000-memory.dmp