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Analysis
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max time kernel
225s -
max time network
156s -
platform
windows7_x64 -
resource
win7-20231023-en -
resource tags
arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-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\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 Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41574448-5458-4553-4157-444854584553}\StubPath = "C:\\Windows\\system32\\ahuy.exe" rmass.exe Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41574448-5458-4553-4157-444854584553} rmass.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41574448-5458-4553-4157-444854584553}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a" rmass.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41574448-5458-4553-4157-444854584553}\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 3044 rmass.exe 2536 rmass.exe -
Loads dropped DLL 3 IoCs
pid Process 2576 NEAS.58129d574276d13cf0744a87d51ee28a.exe 2576 NEAS.58129d574276d13cf0744a87d51ee28a.exe 3044 rmass.exe -
resource yara_rule behavioral1/memory/2576-0-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/memory/2576-5-0x00000000002B0000-0x00000000002C1000-memory.dmp upx behavioral1/files/0x0003000000004ed7-4.dat upx behavioral1/memory/2576-6-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/files/0x0003000000004ed7-9.dat upx behavioral1/files/0x0003000000004ed7-10.dat upx behavioral1/memory/3044-20-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/files/0x0003000000004ed7-15.dat upx behavioral1/files/0x0003000000004ed7-14.dat upx behavioral1/files/0x0003000000004ed7-25.dat upx behavioral1/files/0x0003000000004ed7-26.dat upx behavioral1/memory/3044-39-0x0000000000400000-0x0000000000411000-memory.dmp upx behavioral1/memory/2536-61-0x0000000000400000-0x0000000000411000-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 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\winrnt.exe rmass.exe File opened for modification C:\Windows\SysWOW64\aset32.exe rmass.exe File opened for modification C:\Windows\SysWOW64\rmass.exe rmass.exe File created C:\Windows\SysWOW64\rmass.exe NEAS.58129d574276d13cf0744a87d51ee28a.exe File opened for modification C:\Windows\SysWOW64\ahuy.exe rmass.exe File created C:\Windows\SysWOW64\ahuy.exe rmass.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 NEAS.58129d574276d13cf0744a87d51ee28a.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\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\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 3044 rmass.exe 3044 rmass.exe 3044 rmass.exe 2536 rmass.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2576 NEAS.58129d574276d13cf0744a87d51ee28a.exe Token: SeDebugPrivilege 3044 rmass.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 2576 wrote to memory of 3044 2576 NEAS.58129d574276d13cf0744a87d51ee28a.exe 28 PID 2576 wrote to memory of 3044 2576 NEAS.58129d574276d13cf0744a87d51ee28a.exe 28 PID 2576 wrote to memory of 3044 2576 NEAS.58129d574276d13cf0744a87d51ee28a.exe 28 PID 2576 wrote to memory of 3044 2576 NEAS.58129d574276d13cf0744a87d51ee28a.exe 28 PID 3044 wrote to memory of 420 3044 rmass.exe 23 PID 3044 wrote to memory of 1192 3044 rmass.exe 8 PID 3044 wrote to memory of 2536 3044 rmass.exe 29 PID 3044 wrote to memory of 2536 3044 rmass.exe 29 PID 3044 wrote to memory of 2536 3044 rmass.exe 29 PID 3044 wrote to memory of 2536 3044 rmass.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\NEAS.58129d574276d13cf0744a87d51ee28a.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.58129d574276d13cf0744a87d51ee28a.exe"1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2576 -
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
- 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:3044 -
C:\Windows\SysWOW64\rmass.exe--k33p3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2536
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:1192
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:420
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
MD5f723b823f5487d7830ac3f777cf1d4eb
SHA190286a1cc7762118fcf0400079edd31eaade5bb2
SHA2566af6a9dffc7cf652d2572f07d44c4cbc08e8394d5b5a2b5805f8c3718032267a
SHA512f7ceee31e3b10d5adae91828e918f4d2e79693e12bd41d26f7e10fb638401fa7cc27b5be0778b150a5553efcf29100330b73eeed694b5820999e9d362091eb25
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Filesize
23KB
MD56b4622fae8a00397bb8c61733253e57c
SHA16972e7308b843220ec5bb21697683547b5348ab4
SHA256995e5dcc6f15d9d901a4012ac5a928d5c471122c253ff7955f70be0b5bba24d8
SHA512925f2dc6ccc8e2fa303062741535a5f7e4b225f9bb1dd1c596aff5ac970c28cd7c776be5571d7e6ed9197b9bc20126a82a7544fe9c77d8ed4c42ce3eedf0be9d
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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
19KB
MD558129d574276d13cf0744a87d51ee28a
SHA1d6ea309607c33a4b064700a4f8b521e5abca5642
SHA2566f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a
SHA5122bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa
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Filesize
1KB
MD5b10b13206b0f2cf3968050072f6979bf
SHA1699db21ba9cecf3f13ac3d76e22cfa41aa94da80
SHA2560eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4
SHA512d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d
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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