Analysis
- max time kernel
31s - max time network
34s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
21/11/2022, 20:32
General
- Target file.exe
- Size 1.3MB
- Sample221121-za94caaf8v
- SHA256 93191a2ceec8f02e01bb256eef4ffaf1c1d1a916de76f4e3788f1657b28efe81
Malware Config
Extracted
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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 15 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.
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of WriteProcessMemory 28 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-9QGPQ.tmp\is-6DGSF.tmp"C:\Users\Admin\AppData\Local\Temp\is-9QGPQ.tmp\is-6DGSF.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1110674 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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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}\nYEI69.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1232 -s 9484⤵
- Loads dropped DLL
- Program crash
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
PrintFolders.exe
PrintFolders.exe
is-6DGSF.tmp
is-6DGSF.tmp
nYEI69.exe
nYEI69.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
PrintFolders.exe
is-6DGSF.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
nYEI69.exe
nYEI69.exe
nYEI69.exe
memory/1144-55-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1144-65-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1144-54-0x0000000076041000-0x0000000076043000-memory.dmp
memory/1232-75-0x0000000001A10000-0x000000000298F000-memory.dmp
memory/1232-74-0x0000000000400000-0x000000000137F000-memory.dmp
memory/1232-85-0x0000000000400000-0x000000000137F000-memory.dmp
memory/1232-77-0x0000000000400000-0x000000000137F000-memory.dmp
memory/1232-76-0x0000000000400000-0x000000000137F000-memory.dmp
memory/1368-73-0x0000000003050000-0x0000000003FCF000-memory.dmp