Analysis
- max time kernel
140s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
08/12/2022, 12:48
General
- Target file.exe
- Size 2.3MB
- Sample221208-p1sa4sda4w
- SHA256 9f2d86c47bd26c705b75ce728d90e18b4ee0b4e48b32d5d306e3634c8d38391f
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
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Kills process with taskkill 1 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-20A5U.tmp\is-0PQ7J.tmp"C:\Users\Admin\AppData\Local\Temp\is-20A5U.tmp\is-0PQ7J.tmp" /SL4 $C01D0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2223099 737282⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\PrintFolders\IntFolders.exe"C:\Program Files (x86)\PrintFolders\IntFolders.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\PtpN0N7FfVW.exe4⤵
- Executes dropped EXE
-
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "IntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\IntFolders.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /im "IntFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
IntFolders.exe
IntFolders.exe
is-0PQ7J.tmp
is-0PQ7J.tmp
_iscrypt.dll
PtpN0N7FfVW.exe
PtpN0N7FfVW.exe
memory/2424-134-0x0000000000400000-0x0000000000418000-memory.dmp
memory/2424-156-0x0000000000400000-0x0000000000418000-memory.dmp
memory/2424-132-0x0000000000400000-0x0000000000418000-memory.dmp
memory/5064-142-0x0000000000400000-0x000000000157A000-memory.dmp
memory/5064-148-0x0000000000400000-0x000000000157A000-memory.dmp
memory/5064-149-0x0000000010000000-0x000000001001B000-memory.dmp
memory/5064-144-0x0000000000400000-0x000000000157A000-memory.dmp
memory/5064-143-0x0000000000400000-0x000000000157A000-memory.dmp
memory/5064-155-0x0000000000400000-0x000000000157A000-memory.dmp