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Analysis
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max time kernel
150s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20231020-en -
resource tags
arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system -
submitted
17/11/2023, 17:25
Behavioral task
behavioral1
Sample
NEAS.58129d574276d13cf0744a87d51ee28a.exe
Resource
win7-20231023-en
Behavioral task
behavioral2
Sample
NEAS.58129d574276d13cf0744a87d51ee28a.exe
Resource
win10v2004-20231020-en
General
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Target
NEAS.58129d574276d13cf0744a87d51ee28a.exe
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Size
19KB
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MD5
58129d574276d13cf0744a87d51ee28a
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SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642
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SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a
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SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa
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SSDEEP
384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXO1Bf:rRkiLw3HsDSARGG/WBf
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 (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\IsInstalled = "1" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\StubPath = "C:\\Windows\\system32\\ahuy.exe" rmass.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446} rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" 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 3096 rmass.exe 1444 rmass.exe -
resource yara_rule behavioral2/memory/4820-0-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/files/0x0008000000022dd5-5.dat upx behavioral2/files/0x0008000000022dd5-6.dat upx behavioral2/files/0x0008000000022dd5-11.dat upx behavioral2/memory/4820-10-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/1444-13-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/3096-66-0x0000000000400000-0x0000000000411000-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}\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.58129d574276d13cf0744a87d51ee28a.exe File created C:\Windows\SysWOW64\rmass.exe NEAS.58129d574276d13cf0744a87d51ee28a.exe File opened for modification C:\Windows\SysWOW64\ahuy.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 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\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 created C:\Windows\SysWOW64\RECOVER32.DLL rmass.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 1444 rmass.exe 1444 rmass.exe 3096 rmass.exe 3096 rmass.exe 3096 rmass.exe 3096 rmass.exe 3096 rmass.exe 3096 rmass.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4820 NEAS.58129d574276d13cf0744a87d51ee28a.exe Token: SeDebugPrivilege 3096 rmass.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 4820 wrote to memory of 3096 4820 NEAS.58129d574276d13cf0744a87d51ee28a.exe 86 PID 4820 wrote to memory of 3096 4820 NEAS.58129d574276d13cf0744a87d51ee28a.exe 86 PID 4820 wrote to memory of 3096 4820 NEAS.58129d574276d13cf0744a87d51ee28a.exe 86 PID 3096 wrote to memory of 1444 3096 rmass.exe 87 PID 3096 wrote to memory of 1444 3096 rmass.exe 87 PID 3096 wrote to memory of 1444 3096 rmass.exe 87 PID 3096 wrote to memory of 636 3096 rmass.exe 3 PID 3096 wrote to memory of 3064 3096 rmass.exe 43
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:636
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:3064
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C:\Users\Admin\AppData\Local\Temp\NEAS.58129d574276d13cf0744a87d51ee28a.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.58129d574276d13cf0744a87d51ee28a.exe"2⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4820 -
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
- 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:3096 -
C:\Windows\SysWOW64\rmass.exe--k33p4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1444
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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
22KB
MD52db4f9b1b12e55c473d71dd3e1ff99aa
SHA17f62bb361d14812e88ed246b9606b688b99d9546
SHA2561537dd445dd5ace7a8b3caa2d02ce365fe7a6ae931bc786097f805ce0d1c8c7e
SHA5123acdd47d347ac2c594700fc98ca7ece46587ed07a85f5e5e114d6a744514a482a6af345970d01369c3f898040f937a298bbbef27699d96b6d3501f8dd8aa45b3
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Filesize
23KB
MD5fbf68468d2b53b460a62f4099a83f2d0
SHA1600ada0b2d367f8ce3247a709db820a04cacbce7
SHA256793c94de9e8cb6b64b2e3294c06efc920a09aa5c5b09436e6d05ca59c50d6a03
SHA512f9b6ec97fcfe4040fc6a4d8a72e15e98d098e3a71057a639f860d73a78a26638775ca4d43818608e77d8928296396c4cc4e61018f882c46c3cc88b31caf38e1d
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Filesize
19KB
MD558129d574276d13cf0744a87d51ee28a
SHA1d6ea309607c33a4b064700a4f8b521e5abca5642
SHA2566f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a
SHA5122bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa
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Filesize
19KB
MD558129d574276d13cf0744a87d51ee28a
SHA1d6ea309607c33a4b064700a4f8b521e5abca5642
SHA2566f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a
SHA5122bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa
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Filesize
19KB
MD558129d574276d13cf0744a87d51ee28a
SHA1d6ea309607c33a4b064700a4f8b521e5abca5642
SHA2566f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a
SHA5122bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa
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Filesize
1KB
MD56f47b62de25d1745e296a06b3f98ed19
SHA1a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f
SHA25615c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4
SHA512dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7