Analysis
- max time kernel
149s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/12/2022, 04:32
General
- Target file.exe
- Size 3.7MB
- Sample221205-e5yzcabb6x
- SHA256 3590c0fdbf31fb03b0230a8dcd1df3707aed50b863d65df6a77a9ea11e155d07
Malware Config
Extracted
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nymaim
-
45.139.105.171
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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 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 9 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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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-7VKP2.tmp\is-QJEI9.tmp"C:\Users\Admin\AppData\Local\Temp\is-7VKP2.tmp\is-QJEI9.tmp" /SL4 $D0066 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3596265 2088962⤵
- 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
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\WBjBFqgQlo5mx.exe4⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
PrintFolders.exe
PrintFolders.exe
is-QJEI9.tmp
is-QJEI9.tmp
_iscrypt.dll
WBjBFqgQlo5mx.exe
WBjBFqgQlo5mx.exe
memory/3892-142-0x0000000000400000-0x0000000001804000-memory.dmp
memory/3892-143-0x0000000000400000-0x0000000001804000-memory.dmp
memory/3892-144-0x0000000000400000-0x0000000001804000-memory.dmp
memory/3892-148-0x0000000000400000-0x0000000001804000-memory.dmp
memory/3892-149-0x0000000010000000-0x000000001001B000-memory.dmp
memory/3916-138-0x0000000000400000-0x0000000000439000-memory.dmp
memory/3916-132-0x0000000000400000-0x0000000000439000-memory.dmp