Analysis
- max time kernel
146s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
08/11/2022, 23:32
General
- Target file.exe
- Size 2.9MB
- Sample221108-3jaavscbg4
- SHA256 10762caaaf0103374e2b01aaf8614c4b8f0943e5e01e211fe18ad89ec11ac32c
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 1 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 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-VON88.tmp\is-Q6HV7.tmp"C:\Users\Admin\AppData\Local\Temp\is-VON88.tmp\is-Q6HV7.tmp" /SL4 $B0194 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2746678 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
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-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
fxsearcher73.exe
fxsearcher73.exe
is-Q6HV7.tmp
is-Q6HV7.tmp
_iscrypt.dll
memory/60-142-0x0000000000400000-0x000000000164C000-memory.dmp
memory/60-144-0x0000000000400000-0x000000000164C000-memory.dmp
memory/60-145-0x0000000000400000-0x000000000164C000-memory.dmp
memory/60-146-0x0000000000400000-0x000000000164C000-memory.dmp
memory/4200-132-0x0000000000400000-0x0000000000414000-memory.dmp
memory/4200-134-0x0000000000400000-0x0000000000414000-memory.dmp
memory/4200-143-0x0000000000400000-0x0000000000414000-memory.dmp