Analysis
- max time kernel
101s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/10/2022, 04:07
General
- Target file.exe
- Size 359KB
- Sample221005-epmldadcd8
- SHA256 eede6d5ec55cb31d875c5f746f7f66304babf2195cbaa4aeb860b785385ca7b6
Malware Config
Extracted
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nymaim
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208.67.104.97
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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.
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- AutoIT Executable 2 IoCs
AutoIT scripts compiled to PE executables.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 14 IoCs
- Kills process with taskkill 1 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 4522⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 7642⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 8042⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 8042⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 8802⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 9282⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 9362⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 10442⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 13962⤵
- Program crash
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\SP67sCNTn\Cleaner.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\SP67sCNTn\Cleaner.exe"C:\Users\Admin\AppData\Local\Temp\SP67sCNTn\Cleaner.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 14442⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 16562⤵
- Program crash
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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⤵
- 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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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 16122⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 16482⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 17282⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 604 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 388 -p 4328 -ip 43281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 4328 -ip 43281⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Bunifu_UI_v1.5.3.dll
Cleaner.exe
Cleaner.exe
memory/4328-142-0x00000000004DC000-0x0000000000503000-memory.dmp
memory/4328-147-0x0000000010000000-0x000000001001B000-memory.dmp
memory/4328-154-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4328-134-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4328-153-0x00000000004DC000-0x0000000000503000-memory.dmp
memory/4328-132-0x00000000004DC000-0x0000000000503000-memory.dmp
memory/4328-143-0x0000000000610000-0x000000000064F000-memory.dmp
memory/4328-133-0x0000000000610000-0x000000000064F000-memory.dmp
memory/4328-145-0x0000000000400000-0x000000000045F000-memory.dmp
memory/5104-141-0x000001E46D8C0000-0x000001E46D902000-memory.dmp
memory/5104-146-0x00007FFE1B750000-0x00007FFE1C211000-memory.dmp
memory/5104-144-0x00007FFE1B750000-0x00007FFE1C211000-memory.dmp
memory/5104-139-0x000001E46A4F0000-0x000001E46A646000-memory.dmp