Analysis
- max time kernel
137s - max time network
149s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
24/11/2022, 01:02
General
- Target file.exe
- Size 1.2MB
- Sample221124-bdsfpsca5v
- SHA256 3ccd2796b8ef206c6b7a04a4af195b239b9f3121be63e273d7ed4fa4ec37e45a
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-RQE7R.tmp\is-JLJCF.tmp"C:\Users\Admin\AppData\Local\Temp\is-RQE7R.tmp\is-JLJCF.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1035888 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}\5xMJb91CE6.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-JLJCF.tmp
is-JLJCF.tmp
5xMJb91CE6.exe
5xMJb91CE6.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-JLJCF.tmp
5xMJb91CE6.exe
5xMJb91CE6.exe
5xMJb91CE6.exe
memory/520-87-0x0000000000400000-0x0000000001372000-memory.dmp
memory/520-75-0x00000000018D0000-0x0000000002842000-memory.dmp
memory/520-76-0x00000000018D0000-0x0000000002842000-memory.dmp
memory/520-77-0x0000000000400000-0x0000000001372000-memory.dmp
memory/520-78-0x0000000000400000-0x0000000001372000-memory.dmp
memory/520-95-0x0000000000400000-0x0000000001372000-memory.dmp
memory/520-88-0x0000000010000000-0x000000001001B000-memory.dmp
memory/520-74-0x0000000000400000-0x0000000001372000-memory.dmp
memory/944-65-0x0000000000400000-0x0000000000413000-memory.dmp
memory/944-54-0x0000000074DE1000-0x0000000074DE3000-memory.dmp
memory/944-55-0x0000000000400000-0x0000000000413000-memory.dmp
memory/944-97-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1176-73-0x0000000002FE0000-0x0000000003F52000-memory.dmp
memory/1176-86-0x0000000002FE0000-0x0000000003F52000-memory.dmp