Analysis
- max time kernel
67s - max time network
70s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
- submitted
13/11/2022, 04:17
General
- Target file.exe
- Size 2.9MB
- Sample221113-ewcprade3v
- SHA256 9beea8dff4dfe31495881c35c2f427e78f87d668af6bd26adc6187d23752fcea
Malware Config
Extracted
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nymaim
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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 6 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.
- Kills process with taskkill 1 IoCs
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 23 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-9IOHR.tmp\is-JQ4O7.tmp"C:\Users\Admin\AppData\Local\Temp\is-9IOHR.tmp\is-JQ4O7.tmp" /SL4 $6012A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2745757 527362⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\ghSearcher\ghsearcher78.exe"C:\Program Files (x86)\ghSearcher\ghsearcher78.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\k2iNKGPWnPm.exe4⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "ghsearcher78.exe" /f & erase "C:\Program Files (x86)\ghSearcher\ghsearcher78.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im "ghsearcher78.exe" /f5⤵
- 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
ghsearcher78.exe
ghsearcher78.exe
is-JQ4O7.tmp
is-JQ4O7.tmp
k2iNKGPWnPm.exe
ghsearcher78.exe
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
is-JQ4O7.tmp
k2iNKGPWnPm.exe
memory/544-54-0x0000000075A91000-0x0000000075A93000-memory.dmp
memory/544-55-0x0000000000400000-0x0000000000414000-memory.dmp
memory/544-85-0x0000000000400000-0x0000000000414000-memory.dmp
memory/544-65-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1440-81-0x0000000000400000-0x000000000165D000-memory.dmp
memory/1440-73-0x0000000000400000-0x000000000165D000-memory.dmp
memory/1440-71-0x0000000000400000-0x000000000165D000-memory.dmp
memory/1440-77-0x0000000010000000-0x000000001001B000-memory.dmp
memory/1440-70-0x0000000000400000-0x000000000165D000-memory.dmp
memory/1440-84-0x0000000000400000-0x000000000165D000-memory.dmp
memory/1964-69-0x00000000030E0000-0x000000000433D000-memory.dmp