Analysis
- max time kernel
32s - max time network
54s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
19/09/2022, 04:36
General
- Target file.exe
- Size 364KB
- Sample220919-e7874agcf5
- SHA256 c6a15b35a1fc2a1c4f26f903117e71ce5bc21bf0b2a5ebeadd12e7214c8417b8
Score
10/10
Malware Config
Extracted
Family
-
nymaim
C2
-
208.67.104.97
-
85.31.46.167
Signatures
- NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
- Deletes itself 1 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 use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 8 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:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im "file.exe" /f3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/884-54-0x0000000075DF1000-0x0000000075DF3000-memory.dmp
memory/884-57-0x0000000000400000-0x0000000000460000-memory.dmp
memory/884-56-0x0000000000220000-0x0000000000262000-memory.dmp
memory/884-55-0x000000000055B000-0x0000000000582000-memory.dmp
memory/884-58-0x000000000055B000-0x0000000000582000-memory.dmp
memory/884-59-0x0000000000400000-0x0000000000460000-memory.dmp
memory/884-62-0x0000000000400000-0x0000000000460000-memory.dmp
memory/884-61-0x000000000055B000-0x0000000000582000-memory.dmp