Analysis
- max time kernel
67s - max time network
69s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
01/01/2023, 00:03
General
- Target 6ac6f3bd89386efc9a084f4528890d67c19ed22a7ef8c089d5c329538ed7b8ab.exe
- Size 1.9MB
- Sample230101-ab61msah49
- SHA256 6ac6f3bd89386efc9a084f4528890d67c19ed22a7ef8c089d5c329538ed7b8ab
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\6ac6f3bd89386efc9a084f4528890d67c19ed22a7ef8c089d5c329538ed7b8ab.exe"C:\Users\Admin\AppData\Local\Temp\6ac6f3bd89386efc9a084f4528890d67c19ed22a7ef8c089d5c329538ed7b8ab.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-PGMNJ.tmp\is-TCQ3F.tmp"C:\Users\Admin\AppData\Local\Temp\is-PGMNJ.tmp\is-TCQ3F.tmp" /SL4 $A0022 "C:\Users\Admin\AppData\Local\Temp\6ac6f3bd89386efc9a084f4528890d67c19ed22a7ef8c089d5c329538ed7b8ab.exe" 1723300 2094082⤵
- 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\SplitFiles126.exe"C:\Program Files (x86)\Split Files\SplitFiles126.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}\IVjfVuAqN.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
-
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles126.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles126.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles126.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
SplitFiles126.exe
SplitFiles126.exe
is-TCQ3F.tmp
is-TCQ3F.tmp
IVjfVuAqN.exe
IVjfVuAqN.exe
SplitFiles126.exe
SplitFiles126.exe
SplitFiles126.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-TCQ3F.tmp
IVjfVuAqN.exe
IVjfVuAqN.exe
IVjfVuAqN.exe
memory/944-75-0x0000000001B60000-0x0000000002CAF000-memory.dmp
memory/944-94-0x0000000000400000-0x000000000154F000-memory.dmp
memory/944-76-0x0000000001B60000-0x0000000002CAF000-memory.dmp
memory/944-77-0x0000000000400000-0x000000000154F000-memory.dmp
memory/944-78-0x0000000000400000-0x000000000154F000-memory.dmp
memory/944-74-0x0000000000400000-0x000000000154F000-memory.dmp
memory/944-99-0x0000000000400000-0x000000000154F000-memory.dmp
memory/944-90-0x0000000010000000-0x000000001001B000-memory.dmp
memory/944-89-0x0000000001B60000-0x0000000002CAF000-memory.dmp
memory/944-88-0x0000000001B60000-0x0000000002CAF000-memory.dmp
memory/944-86-0x0000000000400000-0x000000000154F000-memory.dmp
memory/1492-55-0x0000000000400000-0x0000000000439000-memory.dmp
memory/1492-65-0x0000000000400000-0x0000000000439000-memory.dmp
memory/1492-54-0x0000000075451000-0x0000000075453000-memory.dmp
memory/1492-100-0x0000000000400000-0x0000000000439000-memory.dmp
memory/1704-87-0x00000000039A0000-0x0000000004AEF000-memory.dmp
memory/1704-69-0x00000000039A0000-0x0000000004AEF000-memory.dmp