Analysis
- max time kernel
56s - max time network
57s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
06/01/2023, 05:47
General
- Target file.exe
- Size 1.7MB
- Sample230106-ggvm5aed34
- SHA256 a107e8ca54b230c7363468428f41c25cc582fbcd2288f31ff756cec74dee3856
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 17 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-E6856.tmp\is-BQ332.tmp"C:\Users\Admin\AppData\Local\Temp\is-E6856.tmp\is-BQ332.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1562402 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\Split Files\PlitFiles132.exe"C:\Program Files (x86)\Split Files\PlitFiles132.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}\2X5icQL00oTZ.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
-
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "PlitFiles132.exe" /f & erase "C:\Program Files (x86)\Split Files\PlitFiles132.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /im "PlitFiles132.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
PlitFiles132.exe
PlitFiles132.exe
is-BQ332.tmp
is-BQ332.tmp
2X5icQL00oTZ.exe
2X5icQL00oTZ.exe
PlitFiles132.exe
PlitFiles132.exe
PlitFiles132.exe
is-BQ332.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
2X5icQL00oTZ.exe
2X5icQL00oTZ.exe
2X5icQL00oTZ.exe
memory/896-78-0x0000000000400000-0x0000000001514000-memory.dmp
memory/896-91-0x0000000000400000-0x0000000001514000-memory.dmp
memory/896-76-0x0000000001D30000-0x0000000002E44000-memory.dmp
memory/896-77-0x0000000000400000-0x0000000001514000-memory.dmp
memory/896-74-0x0000000000400000-0x0000000001514000-memory.dmp
memory/896-98-0x0000000000400000-0x0000000001514000-memory.dmp
memory/896-75-0x0000000001D30000-0x0000000002E44000-memory.dmp
memory/896-94-0x0000000000400000-0x0000000001514000-memory.dmp
memory/896-93-0x0000000001D30000-0x0000000002E44000-memory.dmp
memory/896-92-0x0000000001D30000-0x0000000002E44000-memory.dmp
memory/896-87-0x0000000010000000-0x000000001001B000-memory.dmp
memory/1664-86-0x0000000003810000-0x0000000004924000-memory.dmp
memory/1664-73-0x0000000003810000-0x0000000004924000-memory.dmp
memory/1728-55-0x0000000000400000-0x000000000041E000-memory.dmp
memory/1728-54-0x0000000075591000-0x0000000075593000-memory.dmp
memory/1728-68-0x0000000000400000-0x000000000041E000-memory.dmp
memory/1728-100-0x0000000000400000-0x000000000041E000-memory.dmp