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Analysis
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max time kernel
150s -
max time network
143s -
platform
windows7_x64 -
resource
win7-20231025-en -
resource tags
arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system -
submitted
04/11/2023, 08:07
Behavioral task
behavioral1
Sample
NEAS.7d652a1374b838d985eabef0e78199b0.exe
Resource
win7-20231025-en
Behavioral task
behavioral2
Sample
NEAS.7d652a1374b838d985eabef0e78199b0.exe
Resource
win10v2004-20231023-en
General
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Target
NEAS.7d652a1374b838d985eabef0e78199b0.exe
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Size
19KB
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MD5
7d652a1374b838d985eabef0e78199b0
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SHA1
19c61eaf6d9cb56aea25bc989287a4f8d43b8599
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SHA256
252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
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SHA512
c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3
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SSDEEP
384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXK0:rRkiLw3HsDSARGG/60
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\{50545A53-464b-4946-5054-5A53464B4946}\StubPath = "C:\\Windows\\system32\\ahuy.exe" rmass.exe 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 -
Sets file execution options in registry 2 TTPs 3 IoCs
description ioc Process 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 Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe rmass.exe -
Executes dropped EXE 2 IoCs
pid Process 2112 rmass.exe 2860 rmass.exe -
Loads dropped DLL 3 IoCs
pid Process 2032 NEAS.7d652a1374b838d985eabef0e78199b0.exe 2032 NEAS.7d652a1374b838d985eabef0e78199b0.exe 2112 rmass.exe -
resource yara_rule behavioral1/memory/2032-0-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/files/0x0009000000012023-4.dat upx behavioral1/files/0x0009000000012023-7.dat upx behavioral1/files/0x0009000000012023-13.dat upx behavioral1/memory/2112-22-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/files/0x0009000000012023-12.dat upx behavioral1/memory/2032-10-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/files/0x0009000000012023-23.dat upx behavioral1/files/0x0009000000012023-24.dat upx behavioral1/files/0x0009000000012023-6.dat upx behavioral1/memory/2112-25-0x00000000003B0000-0x00000000003C1000-memory.dmp upx behavioral1/memory/2860-26-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/memory/2112-52-0x0000000000400000-0x0000000000411000-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\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\rmass.exe NEAS.7d652a1374b838d985eabef0e78199b0.exe File created C:\Windows\SysWOW64\rmass.exe NEAS.7d652a1374b838d985eabef0e78199b0.exe 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\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 -
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 2112 rmass.exe 2112 rmass.exe 2112 rmass.exe 2860 rmass.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2032 NEAS.7d652a1374b838d985eabef0e78199b0.exe Token: SeDebugPrivilege 2112 rmass.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 2032 wrote to memory of 2112 2032 NEAS.7d652a1374b838d985eabef0e78199b0.exe 28 PID 2032 wrote to memory of 2112 2032 NEAS.7d652a1374b838d985eabef0e78199b0.exe 28 PID 2032 wrote to memory of 2112 2032 NEAS.7d652a1374b838d985eabef0e78199b0.exe 28 PID 2032 wrote to memory of 2112 2032 NEAS.7d652a1374b838d985eabef0e78199b0.exe 28 PID 2112 wrote to memory of 424 2112 rmass.exe 1 PID 2112 wrote to memory of 1252 2112 rmass.exe 12 PID 2112 wrote to memory of 2860 2112 rmass.exe 29 PID 2112 wrote to memory of 2860 2112 rmass.exe 29 PID 2112 wrote to memory of 2860 2112 rmass.exe 29 PID 2112 wrote to memory of 2860 2112 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:1252
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C:\Users\Admin\AppData\Local\Temp\NEAS.7d652a1374b838d985eabef0e78199b0.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.7d652a1374b838d985eabef0e78199b0.exe"2⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032 -
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
- 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:2112 -
C:\Windows\SysWOW64\rmass.exe--k33p4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2860
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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
MD5e242a8595ee535787a5e92565d19f6a8
SHA10721930a96846c119a9a3453fc97975a5d99294d
SHA256081e2fe179c0c6d741a7b902a13a0d0152e1da3482aa4c7c90beec0a69c85df8
SHA5120e789777ed999a740d88ca5878624aa33ce127313f27218a0eb154c0cd776b7824a649eb727f1bdafb8ff731572bfddc7fae8afba525c67b915cf9b70bad2c98
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Filesize
22KB
MD5170cb533de6207cae553f8616da11b64
SHA1eb20f931030d3bc4fb928231b0df149c32129db1
SHA2566adaf4832efb8cde838c5d7bfeada7f4b4be334c3da69824aebb2537ca27b0dc
SHA5126ea0cb34c8da006c8f6646974d7ec451b07c580c9aeaf4aac83d82632b2efa65399e3950f8588450d2e5da8c71225671ce2e2b782b767fa02fe9affd9d930a8d
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Filesize
19KB
MD57d652a1374b838d985eabef0e78199b0
SHA119c61eaf6d9cb56aea25bc989287a4f8d43b8599
SHA256252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
SHA512c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3
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Filesize
19KB
MD57d652a1374b838d985eabef0e78199b0
SHA119c61eaf6d9cb56aea25bc989287a4f8d43b8599
SHA256252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
SHA512c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3
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Filesize
19KB
MD57d652a1374b838d985eabef0e78199b0
SHA119c61eaf6d9cb56aea25bc989287a4f8d43b8599
SHA256252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
SHA512c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3
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Filesize
19KB
MD57d652a1374b838d985eabef0e78199b0
SHA119c61eaf6d9cb56aea25bc989287a4f8d43b8599
SHA256252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
SHA512c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3
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Filesize
1KB
MD5b10b13206b0f2cf3968050072f6979bf
SHA1699db21ba9cecf3f13ac3d76e22cfa41aa94da80
SHA2560eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4
SHA512d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d
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Filesize
19KB
MD57d652a1374b838d985eabef0e78199b0
SHA119c61eaf6d9cb56aea25bc989287a4f8d43b8599
SHA256252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
SHA512c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3
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Filesize
19KB
MD57d652a1374b838d985eabef0e78199b0
SHA119c61eaf6d9cb56aea25bc989287a4f8d43b8599
SHA256252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
SHA512c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3
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Filesize
19KB
MD57d652a1374b838d985eabef0e78199b0
SHA119c61eaf6d9cb56aea25bc989287a4f8d43b8599
SHA256252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
SHA512c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3