Analysis
- max time kernel
74s - max time network
77s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
03/12/2022, 12:18
General
- Target file.exe
- Size 3.4MB
- Sample221203-pgldfsdb6y
- SHA256 aab23925be2b6cefd0765351140d2ae016b066a70452b7b8c3c60e4398737b76
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-6E8D3.tmp\is-JO3CJ.tmp"C:\Users\Admin\AppData\Local\Temp\is-6E8D3.tmp\is-JO3CJ.tmp" /SL4 $60122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3342664 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}\rNi7BmoeK8Y8Sj.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-JO3CJ.tmp
is-JO3CJ.tmp
rNi7BmoeK8Y8Sj.exe
rNi7BmoeK8Y8Sj.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-JO3CJ.tmp
rNi7BmoeK8Y8Sj.exe
rNi7BmoeK8Y8Sj.exe
rNi7BmoeK8Y8Sj.exe
memory/1688-75-0x0000000002280000-0x000000000363D000-memory.dmp
memory/1688-87-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/1688-77-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/1688-78-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/1688-97-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/1688-76-0x0000000002280000-0x000000000363D000-memory.dmp
memory/1688-74-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/1688-93-0x0000000000400000-0x00000000017BD000-memory.dmp
memory/1688-89-0x0000000010000000-0x000000001001B000-memory.dmp
memory/1688-88-0x0000000002280000-0x000000000363D000-memory.dmp
memory/1928-73-0x00000000030E0000-0x000000000449D000-memory.dmp
memory/1928-86-0x00000000030E0000-0x000000000449D000-memory.dmp
memory/2036-65-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2036-54-0x0000000075521000-0x0000000075523000-memory.dmp
memory/2036-55-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2036-98-0x0000000000400000-0x0000000000413000-memory.dmp