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Analysis
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max time kernel
156s -
max time network
129s -
platform
windows7_x64 -
resource
win7-20231025-en -
resource tags
arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system -
submitted
17/11/2023, 00:42
Static task
static1
Behavioral task
behavioral1
Sample
NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
Resource
win7-20231025-en
Behavioral task
behavioral2
Sample
NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
Resource
win10v2004-20231020-en
General
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Target
NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
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Size
21KB
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MD5
c57ead958ef99c2b4c140baa6ce333c0
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SHA1
6bac44ca490c20f8600950e37bfe85285b4de282
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SHA256
f64f4c98c3ed3b6bddd386825eb449cbec31bb25a84729b768295f88402b7677
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SHA512
279d05564714e099574671cd9466002a443f6efe32cb21f066845ddd9f0a1fd9e67c7bad9ffa456905d1aec09773dfd429b5adc174d80e7f5f3bbcb3d5f2d35e
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SSDEEP
384:jIz4sOPwP1mSKBmjpLxoYiekKrYGsUikOPkxOXayYl6mMyIzpegjX:jIUsddqUj4YilKrz4Pk4pYI9D
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 Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946} rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\IsInstalled = "1" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\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 2360 rmass.exe 2832 rmass.exe -
Loads dropped DLL 3 IoCs
pid Process 2580 NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe 2580 NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe 2360 rmass.exe -
resource yara_rule behavioral1/files/0x000a000000012266-1.dat upx behavioral1/memory/2580-2-0x0000000000020000-0x0000000000031000-memory.dmp upx behavioral1/files/0x000a000000012266-7.dat upx behavioral1/files/0x000a000000012266-4.dat upx behavioral1/files/0x000a000000012266-10.dat upx behavioral1/memory/2580-9-0x0000000000020000-0x0000000000031000-memory.dmp upx behavioral1/files/0x000a000000012266-22.dat upx behavioral1/files/0x000a000000012266-21.dat upx behavioral1/files/0x000a000000012266-12.dat upx behavioral1/memory/2360-11-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/memory/2832-24-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/memory/2360-52-0x0000000000400000-0x0000000000411000-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}\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 created C:\Windows\SysWOW64\ntdbg.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 NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe File opened for modification C:\Windows\SysWOW64\ntdbg.exe rmass.exe File opened for modification C:\Windows\SysWOW64\ahuy.exe rmass.exe File created 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\aset32.exe rmass.exe File created C:\Windows\SysWOW64\rmass.exe NEAS.c57ead958ef99c2b4c140baa6ce333c0.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 4 IoCs
pid Process 2360 rmass.exe 2360 rmass.exe 2360 rmass.exe 2832 rmass.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2360 rmass.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 2580 wrote to memory of 2360 2580 NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe 28 PID 2580 wrote to memory of 2360 2580 NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe 28 PID 2580 wrote to memory of 2360 2580 NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe 28 PID 2580 wrote to memory of 2360 2580 NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe 28 PID 2360 wrote to memory of 424 2360 rmass.exe 3 PID 2360 wrote to memory of 1196 2360 rmass.exe 11 PID 2360 wrote to memory of 2832 2360 rmass.exe 29 PID 2360 wrote to memory of 2832 2360 rmass.exe 29 PID 2360 wrote to memory of 2832 2360 rmass.exe 29 PID 2360 wrote to memory of 2832 2360 rmass.exe 29
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:424
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:1196
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C:\Users\Admin\AppData\Local\Temp\NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe"2⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2580 -
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:2360 -
C:\Windows\SysWOW64\rmass.exe--k33p4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2832
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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
21KB
MD5a43c4dde4cda9997195bfd741082eb1e
SHA12b10cd5a221161da1a327951bff70f7961fcaeb3
SHA256a3744001db2d5152d7e8200729fadc76921c12e3fa1dd2e5fa9b7b2a18a7af85
SHA5127972ff02d41b024ad7fc84e16993739962938ed0a7dfcf4b87b68c67536bc0380c3cde8bab8eef2658951799d38aa8f4e888b64acc080079d9db43ea401de522
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Filesize
22KB
MD5f957319116b86d85ed9dbeeec71a1e6e
SHA11bf11559cb48a857c5555e404997c21058f47d68
SHA256eb78cf52238524bc8d00375355f56ce317aad21b73221c3197bab7fa40ac8fc2
SHA512df1ba9e185532d03cffce6231ae16ce53f784525508118e63878b56f184c7a53d832f21a8bee973df91badb03997d1f6ded5d70b45a5b33d1e98a99bf2c3a03e
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Filesize
19KB
MD5aab73f099c13687484d94d91b431eb7a
SHA120588702447ca2fe4b29b5ad4381e9fd6415cd95
SHA2569c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec
SHA512b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388
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Filesize
19KB
MD5aab73f099c13687484d94d91b431eb7a
SHA120588702447ca2fe4b29b5ad4381e9fd6415cd95
SHA2569c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec
SHA512b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388
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Filesize
19KB
MD5aab73f099c13687484d94d91b431eb7a
SHA120588702447ca2fe4b29b5ad4381e9fd6415cd95
SHA2569c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec
SHA512b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388
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Filesize
19KB
MD5aab73f099c13687484d94d91b431eb7a
SHA120588702447ca2fe4b29b5ad4381e9fd6415cd95
SHA2569c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec
SHA512b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388
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Filesize
1KB
MD5b10b13206b0f2cf3968050072f6979bf
SHA1699db21ba9cecf3f13ac3d76e22cfa41aa94da80
SHA2560eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4
SHA512d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d
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Filesize
19KB
MD5aab73f099c13687484d94d91b431eb7a
SHA120588702447ca2fe4b29b5ad4381e9fd6415cd95
SHA2569c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec
SHA512b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388
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Filesize
19KB
MD5aab73f099c13687484d94d91b431eb7a
SHA120588702447ca2fe4b29b5ad4381e9fd6415cd95
SHA2569c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec
SHA512b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388
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Filesize
19KB
MD5aab73f099c13687484d94d91b431eb7a
SHA120588702447ca2fe4b29b5ad4381e9fd6415cd95
SHA2569c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec
SHA512b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388