0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd

General

Target

0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
Size

22KB
MD5

cf4d9e5de61275e0bb616da00003c8a0
SHA1

fd37bdad037cc2d30e44137e9033301102a2b2a7
SHA256

0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd
SHA512

edb0a55f8ec55927322a1322c0a60bd2ffa0e89c960b5861b5f5286aadeb922513d06577ba720ebf2c0913577cb66ec4021ee33c9eeb891b87e192d68a572c1d
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXVB77K:rRkiLw3HsDSARGG/r7K

Score

10^/10

evasion persistence trojan upx

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\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

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
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4748505A-5247-4643-4748-505A52474643}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4748505A-5247-4643-4748-505A52474643}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4748505A-5247-4643-4748-505A52474643}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4748505A-5247-4643-4748-505A52474643}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	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

2148 rmass.exe
2124 rmass.exe

pid	process
2148	rmass.exe
2124	rmass.exe

Loads dropped DLL 3 IoCs

Processes:

0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exermass.exe

pid	process
2028	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
2028	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
2148	rmass.exe

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/2028-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
\Windows\SysWOW64\rmass.exe	upx
behavioral1/memory/2028-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2148-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2124-26-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2124-61-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2148-60-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2148-100-0x0000000000360000-0x0000000000371000-memory.dmp	upx

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
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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345 = "a"	rmass.exe

Drops file in System32 directory 12 IoCs

Processes:

rmass.exe0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe

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\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
File created	C:\Windows\SysWOW64\rmass.exe	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.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\rmass.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	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

2148 rmass.exe
2148 rmass.exe
2148 rmass.exe
2124 rmass.exe

pid	process
2148	rmass.exe
2148	rmass.exe
2148	rmass.exe
2124	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exermass.exe

description	pid	process
Token: SeDebugPrivilege	2028	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
Token: SeDebugPrivilege	2148	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exermass.exe

description	pid	process	target process
PID 2028 wrote to memory of 2148	2028	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe	rmass.exe
PID 2028 wrote to memory of 2148	2028	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe	rmass.exe
PID 2028 wrote to memory of 2148	2028	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe	rmass.exe
PID 2028 wrote to memory of 2148	2028	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe	rmass.exe
PID 2148 wrote to memory of 2124	2148	rmass.exe	rmass.exe
PID 2148 wrote to memory of 2124	2148	rmass.exe	rmass.exe
PID 2148 wrote to memory of 2124	2148	rmass.exe	rmass.exe
PID 2148 wrote to memory of 2124	2148	rmass.exe	rmass.exe
PID 2148 wrote to memory of 436	2148	rmass.exe	winlogon.exe
PID 2148 wrote to memory of 1196	2148	rmass.exe	Explorer.EXE

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:436

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1196

C:\Users\Admin\AppData\Local\Temp\0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
"C:\Users\Admin\AppData\Local\Temp\0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe"
2⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2028

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:2148

C:\Windows\SysWOW64\rmass.exe
--k33p
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2124

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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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
24KB

MD5
32cdeb072c3757926d43560f9ae3a973

SHA1
0574888aa8af5675d39f1ce8688b73a34b060cd3

SHA256
8310899ae56f8302dc1a023dba239d1b4c7980ad2ff34b16fd472a7478001005

SHA512
1ccf9d4c8d80245d3a0d9314b4af53f26fbf330556015036fcf05633c68c6ad0bd45adc58218e37350b29357fbcfba285d3f411e2d96f801885d78e17a0a311a

Download Submit
C:\Windows\SysWOW64\ntdbg.exe
Filesize
25KB

MD5
990f1c763f6967019c592628819f6280

SHA1
a9f14f1db6a3213007ae21d4c9b1979a8be6f277

SHA256
8265d2020924cf83d31e257335c67a3ee5104b3da8fdcde53834f2e60b0fb9e8

SHA512
617af2ac9a6020e400d7db6cd96f4b50713873e1a3001b99d2d8100f8ad7ade0fd9097bcf8f53ec98e3cc06f27260fad6fe234c6b2c1f24ca7c755721c3df10b

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
22KB

MD5
cf4d9e5de61275e0bb616da00003c8a0

SHA1
fd37bdad037cc2d30e44137e9033301102a2b2a7

SHA256
0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd

SHA512
edb0a55f8ec55927322a1322c0a60bd2ffa0e89c960b5861b5f5286aadeb922513d06577ba720ebf2c0913577cb66ec4021ee33c9eeb891b87e192d68a572c1d

Download Submit
memory/2028-12-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2028-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2124-61-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2124-26-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2148-25-0x0000000000360000-0x0000000000371000-memory.dmp

Filesize
68KB

Download
memory/2148-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2148-100-0x0000000000360000-0x0000000000371000-memory.dmp

Filesize
68KB

Download
memory/2148-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads