Analysis
- max time kernel
149s - max time network
123s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system - submitted
31/05/2024, 04:25
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe
Resource
win7-20240508-en
windows7-x64
13 signatures
150 seconds
Behavioral task
behavioral2
Sample
e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe
Resource
win10v2004-20240426-en
windows10-2004-x64
12 signatures
150 seconds
General
- Target e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe
- Size 46KB
- Sample240531-e17qpaeh5y
- SHA256 e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5
- MD5 36b4bbc95c3a0f4d7960962e284ef1e8
- SHA1 d2feacf5395ed4de9f717f4ab423140a5a4c0669
- SHA512 5b1be0e052ac21b15be9fb261d37646fb5da12e25efd95e29f500c35f561177cb082cea1fbcac87d35e25f9d681cadcbf35c03237f30f81d3214e22db5b5f15a
- SSDEEP 768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQvBucNs2pd:RUNHFKQbIkHvGkAOdT
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
-
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 - 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\{4C4C5844-4845-5743-4C4C-584448455743}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C4C5844-4845-5743-4C4C-584448455743}\IsInstalled = "1" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C4C5844-4845-5743-4C4C-584448455743}\StubPath = "C:\\Windows\\system32\\ahuy.exe" rmass.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C4C5844-4845-5743-4C4C-584448455743} 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 208 rmass.exe 1416 rmass.exe -
description ioc Process 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 Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "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}\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 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 - Drops file in System32 directory 12 IoCs
description ioc Process File opened for modification 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 e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.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\ahuy.exe rmass.exe File created C:\Windows\SysWOW64\ahuy.exe rmass.exe File opened for modification C:\Windows\SysWOW64\rmass.exe e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe File created 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 - 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 208 rmass.exe 208 rmass.exe 208 rmass.exe 208 rmass.exe 208 rmass.exe 208 rmass.exe 1416 rmass.exe 1416 rmass.exe - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3444 e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe Token: SeDebugPrivilege 208 rmass.exe - Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 3444 wrote to memory of 208 3444 e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe 82 PID 3444 wrote to memory of 208 3444 e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe 82 PID 3444 wrote to memory of 208 3444 e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe 82 PID 208 wrote to memory of 624 208 rmass.exe 5 PID 208 wrote to memory of 3544 208 rmass.exe 56 PID 208 wrote to memory of 1416 208 rmass.exe 83 PID 208 wrote to memory of 1416 208 rmass.exe 83 PID 208 wrote to memory of 1416 208 rmass.exe 83
Processes
-
C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:624
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:3544
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C:\Users\Admin\AppData\Local\Temp\e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe"C:\Users\Admin\AppData\Local\Temp\e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5.exe"2⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3444 -
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:208 -
C:\Windows\SysWOW64\rmass.exe--k33p4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1416
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Windows\SysWOW64\RECOVER32.DLL
- Size 5KB
- SHA256 9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb
- MD5 2b2c28a7a01f9584fe220ef84003427f
- SHA1 5fc023df0b5064045eb8de7f2dbe26f07f6fec70
- SHA512 39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78
- SSDEEP 48:6CsrGV5e2/WJbm73k2vZcsrkqSq2cxc2G5ZwJOFl:SqV5Roa73kQ/kqqAD
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\SysWOW64\ahuy.exe
- Size 48KB
- SHA256 a751088c1a335ffaa0c1c4bd0bc1c3888defba7f43ab1b57787a3dea85d8abac
- MD5 c750a809a4c7755a3121e08f84038570
- SHA1 76cdb01394897ff8e2890f83e259cb936551b34b
- SHA512 2d4da368270cfd39f5ca15f3f69754f85ce50820e80ef65d0e733314a9e0804be5931d4993123e435648a06460d5c3f041223701bb5862e7b1dd159a18f3e774
- SSDEEP 768:jIUJY206Cmq4XyS25lrZKd7uNPC/F4zZ3TKUH4hoMQ3o1CV:jbBq0yL5llNDVH+oMQ3oMV
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\SysWOW64\ntdbg.exe
- Size 49KB
- SHA256 a59a36dbe62062056f8321fefcec97b904e46a64b44017364d902515007a7bf2
- MD5 dbeeb4ea86a0d6143507dba4b0540fca
- SHA1 35d42d32199291d74ef3f8488af66d675be4624e
- SHA512 4ebdcbf9ebb1af2cea308d125ae89b875b7bc580cfe977f3d5fde9aad77a12f223a8c5e30ad3193de85c33694057959f67c9da6c2f8a465e7be1bd39b34c23df
- SSDEEP 768:ErzOxOZla12vpRON0ntJmDxwAfgxFHXs85bqQ/AXbrT:EWU22RRXtYqFHc88XbrT
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\SysWOW64\rmass.exe
- Size 46KB
- SHA256 e67961e10dc031d6ebfa2f9e2ccf1c5219bda5bc71c5b90db9f0ae2d191e38d5
- MD5 36b4bbc95c3a0f4d7960962e284ef1e8
- SHA1 d2feacf5395ed4de9f717f4ab423140a5a4c0669
- SHA512 5b1be0e052ac21b15be9fb261d37646fb5da12e25efd95e29f500c35f561177cb082cea1fbcac87d35e25f9d681cadcbf35c03237f30f81d3214e22db5b5f15a
- SSDEEP 768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQvBucNs2pd:RUNHFKQbIkHvGkAOdT
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\System32\drivers\etc\hosts
- Size 1KB
- SHA256 15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4
- MD5 6f47b62de25d1745e296a06b3f98ed19
- SHA1 a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f
- SHA512 dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7
- MD5 SHA1 SHA512