Analysis
- max time kernel
108s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/10/2022, 00:54
General
- Target file.exe
- Size 360KB
- Sample221005-a87y7sdab7
- SHA256 a8dbc8187e7aa8782139a561670f0168f1955869749c8ca665c66e79c47ff3d5
Score
10/10
Malware Config
Extracted
Family
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nymaim
C2
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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 3928 -s 4562⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 7722⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 8082⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 8082⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 7882⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 9282⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 10202⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 10442⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 13722⤵
- 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\LO3fw1SYf\Cleaner.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\LO3fw1SYf\Cleaner.exe"C:\Users\Admin\AppData\Local\Temp\LO3fw1SYf\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 3928 -s 13842⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 17842⤵
- 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 3928 -s 17682⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 17602⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3928 -s 16842⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 600 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 612 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 632 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 636 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3928 -ip 39281⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3928 -ip 39281⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Bunifu_UI_v1.5.3.dll
Cleaner.exe
Cleaner.exe
memory/3928-136-0x0000000000400000-0x000000000045F000-memory.dmp
memory/3928-146-0x0000000010000000-0x000000001001B000-memory.dmp
memory/3928-132-0x000000000053C000-0x0000000000562000-memory.dmp
memory/3928-135-0x000000000053C000-0x0000000000562000-memory.dmp
memory/3928-153-0x0000000000400000-0x000000000045F000-memory.dmp
memory/3928-134-0x0000000000400000-0x000000000045F000-memory.dmp
memory/3928-152-0x000000000053C000-0x0000000000562000-memory.dmp
memory/3928-133-0x00000000004D0000-0x000000000050F000-memory.dmp
memory/4216-141-0x0000025B8F840000-0x0000025B8F996000-memory.dmp
memory/4216-145-0x00007FFED8B40000-0x00007FFED9601000-memory.dmp
memory/4216-144-0x00007FFED8B40000-0x00007FFED9601000-memory.dmp
memory/4216-143-0x0000025B91560000-0x0000025B915A2000-memory.dmp