Analysis
- max time kernel
165s - max time network
175s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
07/12/2022, 22:02
General
- Target file.exe
- Size 2.4MB
- Sample221207-1xscgsbd2w
- SHA256 692a97cb2f62ee8f612fe55660099e1aa5f7b692002c27ece4be86c44d6039c7
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-IJRKU.tmp\is-0A0HJ.tmp"C:\Users\Admin\AppData\Local\Temp\is-IJRKU.tmp\is-0A0HJ.tmp" /SL4 $13006C "C:\Users\Admin\AppData\Local\Temp\file.exe" 2235404 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\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\x807WxF9N.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-0A0HJ.tmp
is-0A0HJ.tmp
x807WxF9N.exe
x807WxF9N.exe
memory/3776-137-0x0000000000400000-0x0000000000418000-memory.dmp
memory/3776-132-0x0000000000400000-0x0000000000418000-memory.dmp
memory/4276-142-0x0000000000400000-0x000000000157B000-memory.dmp
memory/4276-143-0x0000000000400000-0x000000000157B000-memory.dmp
memory/4276-147-0x0000000000400000-0x000000000157B000-memory.dmp
memory/4276-148-0x0000000010000000-0x000000001001B000-memory.dmp