Analysis
- max time kernel
62s - max time network
64s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
22/11/2022, 04:47
General
- Target file.exe
- Size 1.3MB
- Sample221122-fejbmsaf39
- SHA256 266e5b9dc714d3e25047372c0fffc8949c7c1df98fcb398baa731a6d6087b52d
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 10 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 35 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-5987C.tmp\is-4LHM1.tmp"C:\Users\Admin\AppData\Local\Temp\is-5987C.tmp\is-4LHM1.tmp" /SL4 $60122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1097323 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\PrintFolders\PrintFolders.exe"C:\Program Files (x86)\PrintFolders\PrintFolders.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\PuajonRzWUfSn.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
-
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /im "PrintFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
PrintFolders.exe
PrintFolders.exe
is-4LHM1.tmp
is-4LHM1.tmp
PuajonRzWUfSn.exe
PuajonRzWUfSn.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
is-4LHM1.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
PuajonRzWUfSn.exe
PuajonRzWUfSn.exe
PuajonRzWUfSn.exe
memory/536-65-0x0000000000400000-0x0000000000413000-memory.dmp
memory/536-54-0x0000000075B11000-0x0000000075B13000-memory.dmp
memory/536-97-0x0000000000400000-0x0000000000413000-memory.dmp
memory/536-55-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1160-90-0x0000000002F30000-0x0000000003EA8000-memory.dmp
memory/1160-73-0x0000000002F30000-0x0000000003EA8000-memory.dmp
memory/1572-86-0x0000000010000000-0x000000001001B000-memory.dmp
memory/1572-77-0x0000000000400000-0x0000000001378000-memory.dmp
memory/1572-78-0x0000000000400000-0x0000000001378000-memory.dmp
memory/1572-74-0x0000000000400000-0x0000000001378000-memory.dmp
memory/1572-91-0x0000000000400000-0x0000000001378000-memory.dmp
memory/1572-92-0x0000000001B10000-0x0000000002A88000-memory.dmp
memory/1572-76-0x0000000001B10000-0x0000000002A88000-memory.dmp
memory/1572-96-0x0000000000400000-0x0000000001378000-memory.dmp
memory/1572-75-0x0000000001B10000-0x0000000002A88000-memory.dmp