Analysis
- max time kernel
42s - max time network
45s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
30/08/2022, 16:19
General
- Target file.exe
- Size 380KB
- Sample220830-tsg8dsdag5
- SHA256 308b9d686f10b6164f3334c657fdefb82cd9209845e50b78679452db9cd08368
Score
10/10
Malware Config
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/1948-54-0x0000000075F51000-0x0000000075F53000-memory.dmp
memory/1948-56-0x00000000002B0000-0x00000000002F2000-memory.dmp
memory/1948-55-0x000000000090B000-0x0000000000932000-memory.dmp
memory/1948-57-0x0000000000400000-0x0000000000862000-memory.dmp
memory/1948-59-0x000000000090B000-0x0000000000932000-memory.dmp
memory/1948-60-0x0000000000400000-0x0000000000862000-memory.dmp