Analysis
- max time kernel
58s - max time network
59s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
06/01/2023, 16:03
General
- Target file.exe
- Size 1.8MB
- Sample230106-thc6pach21
- SHA256 f9534c55a225786704f3a6d6df6f8c21a27c6b73fc7afefa22e949187235ceb6
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-O5U95.tmp\is-QKDVN.tmp"C:\Users\Admin\AppData\Local\Temp\is-O5U95.tmp\is-QKDVN.tmp" /SL4 $7011E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1585091 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}\5e0qB6464.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-QKDVN.tmp
is-QKDVN.tmp
5e0qB6464.exe
5e0qB6464.exe
PlitFiles132.exe
PlitFiles132.exe
PlitFiles132.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-QKDVN.tmp
5e0qB6464.exe
5e0qB6464.exe
5e0qB6464.exe
memory/928-86-0x0000000010000000-0x000000001001B000-memory.dmp
memory/928-75-0x0000000001E70000-0x0000000002F84000-memory.dmp
memory/928-76-0x0000000001E70000-0x0000000002F84000-memory.dmp
memory/928-77-0x0000000000400000-0x0000000001514000-memory.dmp
memory/928-78-0x0000000000400000-0x0000000001514000-memory.dmp
memory/928-94-0x0000000000400000-0x0000000001514000-memory.dmp
memory/928-90-0x0000000000400000-0x0000000001514000-memory.dmp
memory/928-74-0x0000000000400000-0x0000000001514000-memory.dmp
memory/1700-55-0x0000000000400000-0x000000000041E000-memory.dmp
memory/1700-54-0x0000000075FF1000-0x0000000075FF3000-memory.dmp
memory/1700-65-0x0000000000400000-0x000000000041E000-memory.dmp
memory/1700-96-0x0000000000400000-0x000000000041E000-memory.dmp
memory/1748-73-0x00000000039A0000-0x0000000004AB4000-memory.dmp