Analysis
- max time kernel
146s - max time network
155s - platform
windows7_x64 - resource
win7-20220901-en - resource tags
- submitted
09/11/2022, 02:17
General
- Target file.exe
- Size 2.9MB
- Sample221109-cqp2saefep
- SHA256 d30d5758a31a3aa4124f8fc4f6366a6bc257c6beca2123b0749305ffaf12c5d5
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 2 IoCs
- Loads dropped DLL 5 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 12 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of WriteProcessMemory 11 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-EB4G7.tmp\is-5EM2F.tmp"C:\Users\Admin\AppData\Local\Temp\is-EB4G7.tmp\is-5EM2F.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2741891 527362⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\fxSearcher\fxsearcher73.exe"C:\Program Files (x86)\fxSearcher\fxsearcher73.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
fxsearcher73.exe
is-5EM2F.tmp
is-5EM2F.tmp
fxsearcher73.exe
is-5EM2F.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
memory/1208-74-0x0000000003220000-0x000000000446C000-memory.dmp
memory/1208-70-0x0000000003220000-0x000000000446C000-memory.dmp
memory/1380-54-0x00000000757A1000-0x00000000757A3000-memory.dmp
memory/1380-65-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1380-55-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1484-72-0x0000000000400000-0x000000000164C000-memory.dmp
memory/1484-73-0x0000000000400000-0x000000000164C000-memory.dmp
memory/1484-71-0x0000000000400000-0x000000000164C000-memory.dmp
memory/1484-75-0x0000000000400000-0x000000000164C000-memory.dmp