Analysis
- max time kernel
149s - max time network
95s - platform
windows10-2004_x64 - resource
win10v2004-20240611-en - resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system - submitted
13/06/2024, 22:11
Behavioral task
behavioral1
Sample
449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe
Resource
win7-20240508-en
windows7-x64
14 signatures
150 seconds
Behavioral task
behavioral2
Sample
449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe
Resource
win10v2004-20240611-en
windows10-2004-x64
13 signatures
150 seconds
General
- Target 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe
- Size 22KB
- Sample240613-14bnbascpg
- SHA256 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646
- MD5 7034d5d91c2548e5b96fc29034cd745d
- SHA1 a097cba58d7c1300edf6a8d4e6221c6855344261
- SHA512 4154bc637dd07b0d3a374601f8697c6367e1d3faeec1ebc02c48b9ffac6cc09ae4ff9d5305cb0220334e61b81d6aa861c0ed32d1e319363b53de3274d50f3a9c
- SSDEEP 384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6cU6Ay8:rRkiLw3HsDSARGG/MMb7ry8
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
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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 - 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\{454E5851-4845-5442-454E-585148455442} rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{454E5851-4845-5442-454E-585148455442}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{454E5851-4845-5442-454E-585148455442}\IsInstalled = "1" rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{454E5851-4845-5442-454E-585148455442}\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 3224 rmass.exe 2456 rmass.exe -
resource yara_rule behavioral2/memory/324-0-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/files/0x00060000000233cd-5.dat upx behavioral2/memory/324-8-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/3224-10-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/2456-19-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral2/memory/3224-53-0x0000000000400000-0x0000000000411000-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 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\rmass.exe 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.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 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 opened for modification C:\Windows\SysWOW64\idbg32.exe rmass.exe File created C:\Windows\SysWOW64\rmass.exe 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe File created C:\Windows\SysWOW64\ntdbg.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 3224 rmass.exe 3224 rmass.exe 3224 rmass.exe 3224 rmass.exe 3224 rmass.exe 3224 rmass.exe 2456 rmass.exe 2456 rmass.exe - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 324 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe Token: SeDebugPrivilege 3224 rmass.exe - Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 324 wrote to memory of 3224 324 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe 82 PID 324 wrote to memory of 3224 324 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe 82 PID 324 wrote to memory of 3224 324 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe 82 PID 3224 wrote to memory of 616 3224 rmass.exe 5 PID 3224 wrote to memory of 3456 3224 rmass.exe 56 PID 3224 wrote to memory of 2456 3224 rmass.exe 83 PID 3224 wrote to memory of 2456 3224 rmass.exe 83 PID 3224 wrote to memory of 2456 3224 rmass.exe 83
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:616
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:3456
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C:\Users\Admin\AppData\Local\Temp\449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe"C:\Users\Admin\AppData\Local\Temp\449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646.exe"2⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:324 -
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:3224 -
C:\Windows\SysWOW64\rmass.exe--k33p4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2456
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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 24KB
- SHA256 2cf42e9d33e0c562281fb42879a0de14688541b7a95f9ba4da0d8435c32a67e2
- MD5 7c73f908e9ab04dc97b0e36a7c6367f1
- SHA1 3c791cb2a5acdf189710c2544264d3e0c5e386fb
- SHA512 7d8b05e499534f75dc138528ee8c0fd3d13ecd1c2851128ed71f34226b9dfe9ce97443d9600c7f1dc76b900c2f1d9466e22fa35e7ab76e9500fab3fcfd6ae382
- SSDEEP 384:jIz4z1zAdTTdJg+Yu6GsPbQVCGPf61ucyQhe30NlISe1D4E:jIUzhITTcP8UGqg3y+S4D4E
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\SysWOW64\ntdbg.exe
- Size 25KB
- SHA256 bf4be0173ef7d2a8e4a9878926c83dcc41a90790b1f85fc450db8bf185cebc1e
- MD5 3b0477f323ada4da3b88b6b8d329c9be
- SHA1 0e7d12d814ec4d2908d3d0f814a525edb4d8cb57
- SHA512 553f12188f99efac2cf0a370a0d88906499552a0ad357ff8d3d86922c33ad9bf99ef941cd1cc1831aafecd70ef1378beecad8708f4b241a85d9cbe27f5a99ceb
- SSDEEP 384:ErzPO1zAdTTdJg+Yu6GsPbQVCGPf61ucyQhe30NlISe1D4x:ErzOhITTcP8UGqg3y+S4D4x
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\SysWOW64\rmass.exe
- Size 22KB
- SHA256 449caeb87ecc337c58ad327d728130eade2ca4b641d27cc6d20bdaa054597646
- MD5 7034d5d91c2548e5b96fc29034cd745d
- SHA1 a097cba58d7c1300edf6a8d4e6221c6855344261
- SHA512 4154bc637dd07b0d3a374601f8697c6367e1d3faeec1ebc02c48b9ffac6cc09ae4ff9d5305cb0220334e61b81d6aa861c0ed32d1e319363b53de3274d50f3a9c
- SSDEEP 384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6cU6Ay8:rRkiLw3HsDSARGG/MMb7ry8
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\System32\drivers\etc\hosts
- Size 1KB
- SHA256 15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4
- MD5 6f47b62de25d1745e296a06b3f98ed19
- SHA1 a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f
- SHA512 dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7
- MD5 SHA1 SHA512