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Analysis
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max time kernel
149s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
07/05/2024, 23:57
Static task
static1
Behavioral task
behavioral1
Sample
6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe
Resource
win10v2004-20240419-en
General
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Target
6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe
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Size
66KB
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MD5
6f6d1a905b7106996ffad17bba7d7980
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SHA1
2ea3e6fe060788d9bfe09ac0461ab947081ec0f3
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SHA256
a0968ce30f7a79faf012fc9cadf2eff6eb858eb626ed5555891933102f6e0e2b
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SHA512
c0afe1f0d27c4f23b53e0c792f5962a7a52b9d981d361527f382a71be1c48fdcee8b00c26e5e088baf869ffaff4a2129f1e00dc7e58994458d0bf76ffafb0004
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SSDEEP
1536:jAoDBgDkD9aiWyECoMdVJc5w2BPEF4tsk:8yZaRyECoMdVJc55Ketsk
Malware Config
Signatures
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description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "5120" rmass.exe 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 -
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 Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{53434647-4252-4254-5343-464742524254} rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{53434647-4252-4254-5343-464742524254}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{53434647-4252-4254-5343-464742524254}\IsInstalled = "1" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{53434647-4252-4254-5343-464742524254}\StubPath = "C:\\Windows\\system32\\ahuy.exe" 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 1880 rmass.exe 1976 rmass.exe -
Loads dropped DLL 3 IoCs
pid Process 1724 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 1724 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 1880 rmass.exe -
resource yara_rule behavioral1/files/0x000b000000015d0f-1.dat upx behavioral1/memory/1724-2-0x0000000000020000-0x0000000000032000-memory.dmp upx behavioral1/memory/1880-10-0x0000000000400000-0x0000000000412000-memory.dmp upx behavioral1/memory/1880-21-0x0000000000370000-0x0000000000382000-memory.dmp upx behavioral1/memory/1976-23-0x0000000000400000-0x0000000000412000-memory.dmp upx behavioral1/memory/1880-78-0x0000000000400000-0x0000000000412000-memory.dmp upx behavioral1/memory/1976-95-0x0000000000400000-0x0000000000412000-memory.dmp upx -
description ioc Process 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 Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "5120" rmass.exe -
Modifies WinLogon 2 TTPs 5 IoCs
description ioc Process 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 Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\Startup = "Startup" rmass.exe -
Drops file in System32 directory 12 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\ntdbg.exe rmass.exe File created C:\Windows\SysWOW64\ntdbg.exe rmass.exe File opened for modification C:\Windows\SysWOW64\winrnt.exe rmass.exe File opened for modification C:\Windows\SysWOW64\idbg32.exe rmass.exe File opened for modification C:\Windows\SysWOW64\rmass.exe 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe File created C:\Windows\SysWOW64\rmass.exe 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe File opened for modification C:\Windows\SysWOW64\ahuy.exe rmass.exe File created C:\Windows\SysWOW64\ahuy.exe rmass.exe File opened for modification C:\Windows\SysWOW64\RECOVER32.DLL rmass.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\rmass.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\winrnt.exe rmass.exe File opened for modification C:\Program Files (x86)\Common Files\System\aset32.exe rmass.exe File opened for modification C:\Program Files (x86)\Common Files\System\idbg32.exe rmass.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1880 rmass.exe 1880 rmass.exe 1880 rmass.exe 1976 rmass.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1880 rmass.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 1724 wrote to memory of 1880 1724 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 28 PID 1724 wrote to memory of 1880 1724 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 28 PID 1724 wrote to memory of 1880 1724 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 28 PID 1724 wrote to memory of 1880 1724 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 28 PID 1880 wrote to memory of 436 1880 rmass.exe 5 PID 1880 wrote to memory of 1368 1880 rmass.exe 21 PID 1880 wrote to memory of 1976 1880 rmass.exe 29 PID 1880 wrote to memory of 1976 1880 rmass.exe 29 PID 1880 wrote to memory of 1976 1880 rmass.exe 29 PID 1880 wrote to memory of 1976 1880 rmass.exe 29
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:436
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:1368
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C:\Users\Admin\AppData\Local\Temp\6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe"C:\Users\Admin\AppData\Local\Temp\6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe"2⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1724 -
C:\Windows\SysWOW64\rmass.exe"C:\Windows\SysWOW64\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
- Loads dropped DLL
- 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:1880 -
C:\Windows\SysWOW64\rmass.exe--k33p4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1976
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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
66KB
MD58f8ffc57e85d905d26a6d027b4054c44
SHA15ef987170f8bd1ae12458b7cc189bef0d3d37fcf
SHA256912ccc3f4e75a98349a3aa8681d05df4d849c4894b5b8611ae294f9ace73278d
SHA512cfeed5c99f7ec412aa9578c75f0e3a878bc1b8bd366286b69527b16d58dcd1b4b49dbbe2f7c3c41eb5424e63a12e9490bc2197c9fc7e06f175e3e22da8b62e3f
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Filesize
67KB
MD5e9b103ebd4d608e32bb336a468a3267a
SHA11a7f9b331bd100c05aa9d592de94e79b7cf7ae87
SHA256b62fc005b84bd3ac4034814386b3e1fa366c3663cb97606a9af074e574415ca1
SHA51230da8cf3253a5dfa777253af93fd96ef029c50be183c860e5b9acd563e408799b92c66e4490923dcd3c173d3a92e0385bbc2577e6d2ad1b15907bb27dd56253d
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Filesize
1KB
MD5b10b13206b0f2cf3968050072f6979bf
SHA1699db21ba9cecf3f13ac3d76e22cfa41aa94da80
SHA2560eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4
SHA512d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d
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Filesize
63KB
MD576632a6af9e351227900b0743a9f83e7
SHA1ea9ebebd087bc3eed62ae56e1079172d63e7f530
SHA25641d06f70a8d600dd9684b38efd09e56b74432e5823f88d00cdd7a170bd8b782d
SHA51292e95a35569b6571c3d7a781560e61739fcce09092c38646ccc142d2e328f8ba528e33377f9882644d002ec257e3a0d9ae2c2dd22dbc06d365800e2b852de44a