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Analysis
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max time kernel
149s -
max time network
131s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
08/05/2024, 14:37
Behavioral task
behavioral1
Sample
dcec5319d1ed548b7523cda83292aad0_NEIKI.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
dcec5319d1ed548b7523cda83292aad0_NEIKI.exe
Resource
win10v2004-20240419-en
General
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Target
dcec5319d1ed548b7523cda83292aad0_NEIKI.exe
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Size
22KB
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MD5
dcec5319d1ed548b7523cda83292aad0
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SHA1
d352a94f3510a1bee94d0657ae951cf498bee616
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SHA256
a945ee255ac7bc5751c05c4913b69c1f0397f176fe502c223f27b9d1ba2a5c37
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SHA512
28019f287be93831b71c7b58c0fa1f546a91a5aa7eed2b570eca49ed82b8a985b7cd59f029ea64cb08e7f777742585b9cf229fbffcd455e4ca88810b1c42f62a
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SSDEEP
384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6Mr0:rRkiLw3HsDSARGG/MMb7rH
Malware Config
Signatures
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description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "5120" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "5120" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "5120" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "5120" rmass.exe -
Drops file in Drivers directory 1 IoCs
description ioc Process File opened for modification C:\Windows\system32\drivers\etc\hosts rmass.exe -
Modifies Installed Components in the registry 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{45584E43-4c5a-4c49-4558-4E434C5A4c49}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{45584E43-4c5a-4c49-4558-4E434C5A4c49}\IsInstalled = "1" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{45584E43-4c5a-4c49-4558-4E434C5A4c49}\StubPath = "C:\\Windows\\system32\\ahuy.exe" rmass.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{45584E43-4c5a-4c49-4558-4E434C5A4c49} rmass.exe -
Sets file execution options in registry 2 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 = "a" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Windows\\system32\\ntdbg.exe" rmass.exe -
Executes dropped EXE 2 IoCs
pid Process 1932 rmass.exe 4368 rmass.exe -
resource yara_rule behavioral2/memory/3836-0-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/3836-7-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/1932-9-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/files/0x000c000000023b59-8.dat upx behavioral2/memory/1932-52-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/4368-53-0x0000000000400000-0x0000000000411000-memory.dmp upx -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "5120" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "5120" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "5120" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "5120" rmass.exe -
Modifies WinLogon 2 TTPs 5 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\Startup = "Startup" rmass.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B} rmass.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345 = "a" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\DLLName = "C:\\Windows\\system32\\RECOVER32.DLL" rmass.exe -
Drops file in System32 directory 12 IoCs
description ioc Process File created C:\Windows\SysWOW64\ntdbg.exe rmass.exe File opened for modification C:\Windows\SysWOW64\ahuy.exe rmass.exe File opened for modification C:\Windows\SysWOW64\RECOVER32.DLL rmass.exe File opened for modification C:\Windows\SysWOW64\winrnt.exe rmass.exe File opened for modification C:\Windows\SysWOW64\rmass.exe dcec5319d1ed548b7523cda83292aad0_NEIKI.exe File created C:\Windows\SysWOW64\rmass.exe dcec5319d1ed548b7523cda83292aad0_NEIKI.exe File created C:\Windows\SysWOW64\RECOVER32.DLL rmass.exe File opened for modification C:\Windows\SysWOW64\aset32.exe rmass.exe File opened for modification C:\Windows\SysWOW64\idbg32.exe rmass.exe File opened for modification C:\Windows\SysWOW64\rmass.exe rmass.exe File opened for modification C:\Windows\SysWOW64\ntdbg.exe rmass.exe File created C:\Windows\SysWOW64\ahuy.exe rmass.exe -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Common Files\System\idbg32.exe rmass.exe File opened for modification C:\Program Files (x86)\Common Files\System\winrnt.exe rmass.exe File opened for modification C:\Program Files (x86)\Common Files\System\aset32.exe rmass.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 1932 rmass.exe 1932 rmass.exe 1932 rmass.exe 1932 rmass.exe 1932 rmass.exe 1932 rmass.exe 4368 rmass.exe 4368 rmass.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3836 dcec5319d1ed548b7523cda83292aad0_NEIKI.exe Token: SeDebugPrivilege 1932 rmass.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 3836 wrote to memory of 1932 3836 dcec5319d1ed548b7523cda83292aad0_NEIKI.exe 85 PID 3836 wrote to memory of 1932 3836 dcec5319d1ed548b7523cda83292aad0_NEIKI.exe 85 PID 3836 wrote to memory of 1932 3836 dcec5319d1ed548b7523cda83292aad0_NEIKI.exe 85 PID 1932 wrote to memory of 4368 1932 rmass.exe 86 PID 1932 wrote to memory of 4368 1932 rmass.exe 86 PID 1932 wrote to memory of 4368 1932 rmass.exe 86 PID 1932 wrote to memory of 608 1932 rmass.exe 5 PID 1932 wrote to memory of 3432 1932 rmass.exe 56
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:608
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:3432
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C:\Users\Admin\AppData\Local\Temp\dcec5319d1ed548b7523cda83292aad0_NEIKI.exe"C:\Users\Admin\AppData\Local\Temp\dcec5319d1ed548b7523cda83292aad0_NEIKI.exe"2⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3836 -
C:\Windows\SysWOW64\rmass.exe"C:\Windows\system32\rmass.exe"3⤵
- Windows security bypass
- Drops file in Drivers directory
- Modifies Installed Components in the registry
- Sets file execution options in registry
- Executes dropped EXE
- Windows security modification
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1932 -
C:\Windows\SysWOW64\rmass.exe--k33p4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:4368
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
5KB
MD52b2c28a7a01f9584fe220ef84003427f
SHA15fc023df0b5064045eb8de7f2dbe26f07f6fec70
SHA2569e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb
SHA51239192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78
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Filesize
24KB
MD5057ec94dc6fbadd308fb005a9335fb4a
SHA17e2f81016269b103444eb3414e0de9ece42df4cf
SHA25665d599c1915b6ac65ef5389f81b0098c3696fd63d5884e9be31602114fb06e39
SHA512635504d2a2726ab1470f293d09ce71395bfc9d5002df23bb4d46c83e8352d90c7cad1ac634a56e5c9315a2098960ed8caeb82c92aec5fc27b75ae62d752ff6c6
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Filesize
25KB
MD510231d8164bcef2500b28d7663c2f107
SHA1d58821c40ff1330a34d7bc0516b248d21ae2065e
SHA2560ade278928607711b44e704f46a3e4e489ef63ea3ca27a8dcedfd95c37d427cc
SHA512983d05d900f57469112b91884907d028d123ba65b9f9f2c83ad566bb46060444f764baee89347ee5e42435613ad073c4cb35ef20719e5a87530727762467d976
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Filesize
22KB
MD5dcec5319d1ed548b7523cda83292aad0
SHA1d352a94f3510a1bee94d0657ae951cf498bee616
SHA256a945ee255ac7bc5751c05c4913b69c1f0397f176fe502c223f27b9d1ba2a5c37
SHA51228019f287be93831b71c7b58c0fa1f546a91a5aa7eed2b570eca49ed82b8a985b7cd59f029ea64cb08e7f777742585b9cf229fbffcd455e4ca88810b1c42f62a
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Filesize
1KB
MD56f47b62de25d1745e296a06b3f98ed19
SHA1a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f
SHA25615c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4
SHA512dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7