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Analysis
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max time kernel
151s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231023-en -
resource tags
arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-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 Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949} rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\IsInstalled = "1" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\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 1972 rmass.exe 1536 rmass.exe -
resource yara_rule behavioral2/memory/3944-0-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/files/0x0006000000022cdf-6.dat upx behavioral2/files/0x0006000000022cdf-5.dat upx behavioral2/files/0x0006000000022cdf-8.dat upx behavioral2/memory/3944-9-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/1972-41-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/1536-45-0x0000000000400000-0x0000000000411000-memory.dmp upx -
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 -
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 opened for modification C:\Windows\SysWOW64\rmass.exe NEAS.7d652a1374b838d985eabef0e78199b0.exe File created C:\Windows\SysWOW64\rmass.exe NEAS.7d652a1374b838d985eabef0e78199b0.exe File created C:\Windows\SysWOW64\ntdbg.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\idbg32.exe rmass.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\ahuy.exe rmass.exe File opened for modification 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 8 IoCs
pid Process 1536 rmass.exe 1536 rmass.exe 1972 rmass.exe 1972 rmass.exe 1972 rmass.exe 1972 rmass.exe 1972 rmass.exe 1972 rmass.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3944 NEAS.7d652a1374b838d985eabef0e78199b0.exe Token: SeDebugPrivilege 1972 rmass.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 3944 wrote to memory of 1972 3944 NEAS.7d652a1374b838d985eabef0e78199b0.exe 93 PID 3944 wrote to memory of 1972 3944 NEAS.7d652a1374b838d985eabef0e78199b0.exe 93 PID 3944 wrote to memory of 1972 3944 NEAS.7d652a1374b838d985eabef0e78199b0.exe 93 PID 1972 wrote to memory of 1536 1972 rmass.exe 92 PID 1972 wrote to memory of 1536 1972 rmass.exe 92 PID 1972 wrote to memory of 1536 1972 rmass.exe 92 PID 1972 wrote to memory of 628 1972 rmass.exe 3 PID 1972 wrote to memory of 3260 1972 rmass.exe 47
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:628
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C:\Users\Admin\AppData\Local\Temp\NEAS.7d652a1374b838d985eabef0e78199b0.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.7d652a1374b838d985eabef0e78199b0.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3944 -
C:\Windows\SysWOW64\rmass.exe"C:\Windows\system32\rmass.exe"2⤵
- 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:1972
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:3260
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C:\Windows\SysWOW64\rmass.exe--k33p1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1536
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
MD52ad0037a7bfb7eddb85a23d2cd41f244
SHA17b457bd12edae90d4b03acdf1a1f3c7a2ef6fcd0
SHA256c75422a32a9dcd67f5596a75c2cb085892d21e59c0574c787076d0bf5293c8d4
SHA51224e0276a1a927cbcead955186d4b8f88c073be30a57cb4a48be31a9f4a5b5a3852970139846b571ca1307a68cd2c63464a11c307b4726138416bf47afa9f37f7
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Filesize
22KB
MD56852a0f6a58035d0a1637d1c6bfcb837
SHA192344a5a990ac7fb64d1299adab337527ee3e8bf
SHA256eb74f66e68a20c52eac3a694d509ea9487854b36dfbefaec98f0b677fa7aea83
SHA51245765fdc4be0acc1420da131a3c7d53f8dbba93f887c1cad29be27a9847398a6d2b29271f6ce2e0cee986e33f5bf3d06082265a68d0bfc56743c29b8d701d32b
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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
MD56f47b62de25d1745e296a06b3f98ed19
SHA1a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f
SHA25615c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4
SHA512dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7