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Analysis
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max time kernel
149s -
max time network
140s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-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\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 Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "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\{5148545A-5141-535a-5148-545A5141535a}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5148545A-5141-535a-5148-545A5141535a}\IsInstalled = "1" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5148545A-5141-535a-5148-545A5141535a}\StubPath = "C:\\Windows\\system32\\ahuy.exe" rmass.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5148545A-5141-535a-5148-545A5141535a} 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 2592 rmass.exe 3620 rmass.exe -
resource yara_rule behavioral2/files/0x000d000000023ae7-2.dat upx behavioral2/memory/2592-5-0x0000000000400000-0x0000000000412000-memory.dmp upx behavioral2/memory/2592-48-0x0000000000400000-0x0000000000412000-memory.dmp upx behavioral2/memory/3620-49-0x0000000000400000-0x0000000000412000-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 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 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 -
Drops file in System32 directory 12 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\winrnt.exe rmass.exe File opened for modification C:\Windows\SysWOW64\aset32.exe rmass.exe File opened for modification C:\Windows\SysWOW64\ntdbg.exe rmass.exe File created C:\Windows\SysWOW64\RECOVER32.DLL rmass.exe File created C:\Windows\SysWOW64\ntdbg.exe rmass.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 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\rmass.exe 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe File created C:\Windows\SysWOW64\rmass.exe 6f6d1a905b7106996ffad17bba7d7980_NEIKI.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 2592 rmass.exe 2592 rmass.exe 2592 rmass.exe 2592 rmass.exe 2592 rmass.exe 2592 rmass.exe 3620 rmass.exe 3620 rmass.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2592 rmass.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 1096 wrote to memory of 2592 1096 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 83 PID 1096 wrote to memory of 2592 1096 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 83 PID 1096 wrote to memory of 2592 1096 6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe 83 PID 2592 wrote to memory of 3620 2592 rmass.exe 84 PID 2592 wrote to memory of 3620 2592 rmass.exe 84 PID 2592 wrote to memory of 3620 2592 rmass.exe 84 PID 2592 wrote to memory of 616 2592 rmass.exe 5 PID 2592 wrote to memory of 3520 2592 rmass.exe 56
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:616
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:3520
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C:\Users\Admin\AppData\Local\Temp\6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe"C:\Users\Admin\AppData\Local\Temp\6f6d1a905b7106996ffad17bba7d7980_NEIKI.exe"2⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1096 -
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
- 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:2592 -
C:\Windows\SysWOW64\rmass.exe--k33p4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:3620
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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
MD563545a49e6e99c08a379f242820b819a
SHA11bd46dd62dc5d338c58fad3bd8ef824cf58d3c86
SHA2563029dac21fadf6eb0925eea45433bace331f0c2b052e61c5408298e6ecf5732a
SHA512756fe911f0fc3c9306956c40d1214745b8adcfbfce4c0642cee0279a7f7a3081c3ae96888d683c73173c6147ec0bec41e9271b69875b1ff275a8d133033f4109
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Filesize
67KB
MD5e675683dd21a79057c13edbf02ac1343
SHA115da3f1bf6296529f3e3b3f6da236b5ebcad2753
SHA2561c044a117443560037af1403df5cddc27c32305cebbeca0b751884ded0491b7b
SHA512b2b47d8b1cb2eeefa887c6e09f4e1a2ee0d5be3fdff72a160db692c1a500652edb693fcd0f3606720cea5a45b3111b231aae49adc902ac6376fa35ba3cc6cb88
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Filesize
63KB
MD576632a6af9e351227900b0743a9f83e7
SHA1ea9ebebd087bc3eed62ae56e1079172d63e7f530
SHA25641d06f70a8d600dd9684b38efd09e56b74432e5823f88d00cdd7a170bd8b782d
SHA51292e95a35569b6571c3d7a781560e61739fcce09092c38646ccc142d2e328f8ba528e33377f9882644d002ec257e3a0d9ae2c2dd22dbc06d365800e2b852de44a
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Filesize
1KB
MD56f47b62de25d1745e296a06b3f98ed19
SHA1a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f
SHA25615c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4
SHA512dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7