3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510

General

Target

3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe
Size

44KB
MD5

9cc293fe2fc1b5592495b7b66ab15532
SHA1

49f27d6f0c67434d3d0b05fdc56e571015fec925
SHA256

3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510
SHA512

5a412e96fdcafcb893de4e5655325d2b521761d4746c9cfd0b459afeeff4f26219ab2dd1a0d870357fec8eb11712b40c756b58cbaae0aedb1556c6855d0f78d8
SSDEEP

768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQv/+G:RUNHFKQbIkHvGkAu+G

Score

10^/10

evasion persistence trojan

Malware Config

Signatures

Windows security bypass 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

rmass.exe

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

Processes:

rmass.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts rmass.exe

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

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rmass.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{55485251-4b4a-4350-5548-52514B4A4350}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{55485251-4b4a-4350-5548-52514B4A4350}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{55485251-4b4a-4350-5548-52514B4A4350}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{55485251-4b4a-4350-5548-52514B4A4350}	rmass.exe

Sets file execution options in registry 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rmass.exe

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

Processes:

rmass.exermass.exe

pid process

3036 rmass.exe
2604 rmass.exe

pid	process
3036	rmass.exe
2604	rmass.exe

Loads dropped DLL 3 IoCs

Processes:

3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exermass.exe

pid	process
2344	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe
2344	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe
3036	rmass.exe

Windows security modification 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

rmass.exe

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

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

rmass.exe

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

Processes:

rmass.exe3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe

description	ioc	process
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\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 opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe
File created	C:\Windows\SysWOW64\rmass.exe	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.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

Drops file in Program Files directory 3 IoCs

Processes:

rmass.exe

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

Processes:

rmass.exermass.exe

pid process

3036 rmass.exe
3036 rmass.exe
3036 rmass.exe
2604 rmass.exe

pid	process
3036	rmass.exe
3036	rmass.exe
3036	rmass.exe
2604	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exermass.exe

description	pid	process
Token: SeDebugPrivilege	2344	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe
Token: SeDebugPrivilege	3036	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exermass.exe

description	pid	process	target process
PID 2344 wrote to memory of 3036	2344	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe	rmass.exe
PID 2344 wrote to memory of 3036	2344	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe	rmass.exe
PID 2344 wrote to memory of 3036	2344	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe	rmass.exe
PID 2344 wrote to memory of 3036	2344	3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe	rmass.exe
PID 3036 wrote to memory of 428	3036	rmass.exe	winlogon.exe
PID 3036 wrote to memory of 1148	3036	rmass.exe	Explorer.EXE
PID 3036 wrote to memory of 2604	3036	rmass.exe	rmass.exe
PID 3036 wrote to memory of 2604	3036	rmass.exe	rmass.exe
PID 3036 wrote to memory of 2604	3036	rmass.exe	rmass.exe
PID 3036 wrote to memory of 2604	3036	rmass.exe	rmass.exe

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:428

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1148

C:\Users\Admin\AppData\Local\Temp\3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe
"C:\Users\Admin\AppData\Local\Temp\3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510.exe"
2⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2344

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
- 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:3036

C:\Windows\SysWOW64\rmass.exe
--k33p
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2604

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\RECOVER32.DLL

Filesize
5KB

MD5
2b2c28a7a01f9584fe220ef84003427f

SHA1
5fc023df0b5064045eb8de7f2dbe26f07f6fec70

SHA256
9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb

SHA512
39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78

Download Submit
C:\Windows\SysWOW64\ahuy.exe

Filesize
46KB

MD5
eddf63b8e1ed9d2d6fcf9ac6e207b7b0

SHA1
421e2a68b604b499140c6cae02ecfab2e7044949

SHA256
e96427555e2482b40eacf52d5b8618ebc1bd5f8a71d80cd122f0a97d77c505a2

SHA512
f71535d416a26b8ebd32c8e072e1bbe827bc9ba623e7e12e4acbeec0648331e9c292070c05f6c3fdee9ff6db53869b31c833757e3171fa33eb12773d479132f3

Download Submit
C:\Windows\SysWOW64\ntdbg.exe

Filesize
47KB

MD5
e6944a4195d0fab8b4273616377efd66

SHA1
b9d738df58021144ebaeebd0fcc56c96677378c5

SHA256
71d705d7b3d886c46ef159570b2c409da40e0a4c763be63b3a7d90d0998c893e

SHA512
c897110312829d60ee3db3943a6bd1261c87dc38b56fe3881fcf14503153b6b6aba2ce6b2945a702f27825218a5b07bf0fba5d519c10d717d34e376469464a4e

Download Submit
C:\Windows\System32\drivers\etc\hosts

Filesize
1KB

MD5
b10b13206b0f2cf3968050072f6979bf

SHA1
699db21ba9cecf3f13ac3d76e22cfa41aa94da80

SHA256
0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

SHA512
d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
44KB

MD5
9cc293fe2fc1b5592495b7b66ab15532

SHA1
49f27d6f0c67434d3d0b05fdc56e571015fec925

SHA256
3bd80422de8732c1bfe554418c15bcf728532d23af9f4a1d0076985711740510

SHA512
5a412e96fdcafcb893de4e5655325d2b521761d4746c9cfd0b459afeeff4f26219ab2dd1a0d870357fec8eb11712b40c756b58cbaae0aedb1556c6855d0f78d8

Download Submit
memory/2344-9-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2604-56-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3036-55-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads