Analysis
- max time kernel
206s - max time network
314s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
04/12/2022, 10:41
General
- Target c0f12cf3cc2030141227a7a933042a0b2e423fcc010ab5da08465afd2ab8c638.exe
- Size 3.5MB
- Sample221204-mrazcsfa5y
- SHA256 c0f12cf3cc2030141227a7a933042a0b2e423fcc010ab5da08465afd2ab8c638
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.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 28 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\c0f12cf3cc2030141227a7a933042a0b2e423fcc010ab5da08465afd2ab8c638.exe"C:\Users\Admin\AppData\Local\Temp\c0f12cf3cc2030141227a7a933042a0b2e423fcc010ab5da08465afd2ab8c638.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-AQS6K.tmp\is-DHERO.tmp"C:\Users\Admin\AppData\Local\Temp\is-AQS6K.tmp\is-DHERO.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\c0f12cf3cc2030141227a7a933042a0b2e423fcc010ab5da08465afd2ab8c638.exe" 3388813 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}\cRn4PZj.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⤵
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
PrintFolders.exe
PrintFolders.exe
is-DHERO.tmp
is-DHERO.tmp
cRn4PZj.exe
cRn4PZj.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-DHERO.tmp
cRn4PZj.exe
cRn4PZj.exe
cRn4PZj.exe
memory/564-78-0x0000000003400000-0x00000000047BD000-memory.dmp
memory/564-69-0x0000000003400000-0x00000000047BD000-memory.dmp
memory/680-79-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/680-70-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/680-76-0x00000000020F0000-0x00000000034AD000-memory.dmp
memory/680-94-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/680-80-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/680-75-0x00000000020F0000-0x00000000034AD000-memory.dmp
memory/680-89-0x0000000010000000-0x000000001001B000-memory.dmp
memory/680-77-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/680-88-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/1748-55-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1748-54-0x0000000075531000-0x0000000075533000-memory.dmp
memory/1748-65-0x0000000000400000-0x0000000000413000-memory.dmp