62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b

General

Target

62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
Size

20KB
MD5

a946637af622031e12bee2c0c151d009
SHA1

ef321a817edd30d903110c55f2603a8b6ef6863b
SHA256

62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b
SHA512

22112eb5d01aac42e658ca7d61b22f4db434c3e54c7ff6ae9d264aa0a4da6d15123589b3955ec1008c0d89967e0b1316d19876316e67f428cf5b044878b4e6f9
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXwnHs:rRkiLw3HsDSARGG/gM

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\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 (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4A414654-5556-524a-4A41-46545556524a}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4A414654-5556-524a-4A41-46545556524a}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4A414654-5556-524a-4A41-46545556524a}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4A414654-5556-524a-4A41-46545556524a}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	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

1848 rmass.exe
2292 rmass.exe

pid	process
1848	rmass.exe
2292	rmass.exe

Loads dropped DLL 3 IoCs

Processes:

62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exermass.exe

pid	process
2220	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
2220	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
1848	rmass.exe

UPX packed file 7 IoCs

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

upx

Processes:

resource	yara_rule
\Windows\SysWOW64\rmass.exe	upx
behavioral1/memory/2220-3-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1848-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2220-5-0x0000000000320000-0x0000000000331000-memory.dmp	upx
behavioral1/memory/2292-26-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1848-60-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1848-100-0x0000000000370000-0x0000000000381000-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\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

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:

62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exermass.exe

description	ioc	process
File created	C:\Windows\SysWOW64\rmass.exe	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	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
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.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\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\winrnt.exe	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

1848 rmass.exe
1848 rmass.exe
1848 rmass.exe
2292 rmass.exe

pid	process
1848	rmass.exe
1848	rmass.exe
1848	rmass.exe
2292	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exermass.exe

description	pid	process
Token: SeDebugPrivilege	2220	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
Token: SeDebugPrivilege	1848	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exermass.exe

description	pid	process	target process
PID 2220 wrote to memory of 1848	2220	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe	rmass.exe
PID 2220 wrote to memory of 1848	2220	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe	rmass.exe
PID 2220 wrote to memory of 1848	2220	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe	rmass.exe
PID 2220 wrote to memory of 1848	2220	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe	rmass.exe
PID 1848 wrote to memory of 428	1848	rmass.exe	winlogon.exe
PID 1848 wrote to memory of 1200	1848	rmass.exe	Explorer.EXE
PID 1848 wrote to memory of 2292	1848	rmass.exe	rmass.exe
PID 1848 wrote to memory of 2292	1848	rmass.exe	rmass.exe
PID 1848 wrote to memory of 2292	1848	rmass.exe	rmass.exe
PID 1848 wrote to memory of 2292	1848	rmass.exe	rmass.exe

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1200

C:\Users\Admin\AppData\Local\Temp\62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
"C:\Users\Admin\AppData\Local\Temp\62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe"
2⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2220

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:1848

C:\Windows\SysWOW64\rmass.exe
--k33p
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2292

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
22KB

MD5
649b1f3cfc4a43e3253c88ec9b1aed27

SHA1
b533cbc9024eaaf3a6cbb4df0218e71a4db9fd7b

SHA256
3e172df81a614610f68b7ee6c46700c100dbb06bc8bd9d837b0d187098cc9e5d

SHA512
30e573a9a8cbf2e0a80a61fb66d02a8abd1cd7852dff3b96e2d9cfc5ace3a57cefb211c75373f33d9bf7b55894059cbd8b1460556a81caa326799d2132316a17

Download Submit
C:\Windows\SysWOW64\ntdbg.exe
Filesize
23KB

MD5
24ef1eee988344da15bf9a249e9aaa67

SHA1
687cfb9eae0fef720bc2fe99216b3d2fcb67e5a2

SHA256
98f8566ddd12ac3183f2a3c83983d9264cf8b588c567893850218aea3c3e8d75

SHA512
0dccba0bc16de96edb7afc9f858cfcf30981d7d74a27b235df4b2524bbaa1d48bc4e2efe5f8bfe3d531b67f5e3dfb75c7e9123ecff754e30593bf4acbfb9bb1a

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
20KB

MD5
a946637af622031e12bee2c0c151d009

SHA1
ef321a817edd30d903110c55f2603a8b6ef6863b

SHA256
62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b

SHA512
22112eb5d01aac42e658ca7d61b22f4db434c3e54c7ff6ae9d264aa0a4da6d15123589b3955ec1008c0d89967e0b1316d19876316e67f428cf5b044878b4e6f9

Download Submit
memory/1848-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1848-25-0x0000000000370000-0x0000000000381000-memory.dmp

Filesize
68KB

Download
memory/1848-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1848-100-0x0000000000370000-0x0000000000381000-memory.dmp

Filesize
68KB

Download
memory/2220-3-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2220-5-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/2292-26-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads