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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50565759-4e4d-4454-5056-57594E4D4454}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50565759-4e4d-4454-5056-57594E4D4454}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50565759-4e4d-4454-5056-57594E4D4454}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50565759-4e4d-4454-5056-57594E4D4454}\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

4068 rmass.exe
1144 rmass.exe

pid	process
4068	rmass.exe
1144	rmass.exe

UPX packed file 7 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4292-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
C:\Windows\SysWOW64\rmass.exe	upx
behavioral2/memory/4068-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4292-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1144-19-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4068-53-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1144-54-0x0000000000400000-0x0000000000411000-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
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.exe62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe

description	ioc	process
File created	C:\Windows\SysWOW64\ntdbg.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\rmass.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	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
File created	C:\Windows\SysWOW64\rmass.exe	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.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\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\aset32.exe	rmass.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\idbg32.exe	rmass.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\winrnt.exe	rmass.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

rmass.exermass.exe

pid process

4068 rmass.exe
4068 rmass.exe
4068 rmass.exe
4068 rmass.exe
4068 rmass.exe
4068 rmass.exe
1144 rmass.exe
1144 rmass.exe

pid	process
4068	rmass.exe
4068	rmass.exe
4068	rmass.exe
4068	rmass.exe
4068	rmass.exe
4068	rmass.exe
1144	rmass.exe
1144	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exermass.exe

description	pid	process
Token: SeDebugPrivilege	4292	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
Token: SeDebugPrivilege	4068	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exermass.exe

description	pid	process	target process
PID 4292 wrote to memory of 4068	4292	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe	rmass.exe
PID 4292 wrote to memory of 4068	4292	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe	rmass.exe
PID 4292 wrote to memory of 4068	4292	62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe	rmass.exe
PID 4068 wrote to memory of 624	4068	rmass.exe	winlogon.exe
PID 4068 wrote to memory of 1144	4068	rmass.exe	rmass.exe
PID 4068 wrote to memory of 1144	4068	rmass.exe	rmass.exe
PID 4068 wrote to memory of 1144	4068	rmass.exe	rmass.exe
PID 4068 wrote to memory of 3444	4068	rmass.exe	Explorer.EXE

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:624

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3444

C:\Users\Admin\AppData\Local\Temp\62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe
"C:\Users\Admin\AppData\Local\Temp\62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b.exe"
2⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4292

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:4068

C:\Windows\SysWOW64\rmass.exe
--k33p
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1144

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

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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
a7279db853d026eb3d0ebdbb10dcae6e

SHA1
be8b36b113879ad01bfce71304e057c704e6580c

SHA256
b509fedd9dd1f65cc277e8d9a1fb90c452587192a71fb0c7d29a9dbc0cc00d82

SHA512
7b8da0c2e6ad23ff2a2e4673bd98589a4766c803637fb2a77f38225fdd828a86759e8be4c6d4b59e58c1a647354008811eda899a67be18881f8e0541463d4747

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

MD5
3d0f9a7b2061837a389f387ef4fcea4e

SHA1
6e5fde6a90b9064d3c2636323200a2b1d489d3fa

SHA256
db39ebda65b6bf63644d6b5d1a2aed0b7ab60b3b7e7fbc0110166cc3c754a99e

SHA512
b2e85231eec36f0717f307a8fe6dc3ce53defe7cf748be44f66f690633bd5b3cac9c377e12abe74861c086048bdb9288c2e49dbca0b496b0b92d86bf7f104435

Download Submit
C:\Windows\SysWOW64\rmass.exe
Filesize
20KB

MD5
a946637af622031e12bee2c0c151d009

SHA1
ef321a817edd30d903110c55f2603a8b6ef6863b

SHA256
62ee575af4f5e7ef5694857b657c06151d9db1f6e7a1bdfdb4511ab7ba4c8d8b

SHA512
22112eb5d01aac42e658ca7d61b22f4db434c3e54c7ff6ae9d264aa0a4da6d15123589b3955ec1008c0d89967e0b1316d19876316e67f428cf5b044878b4e6f9

Download Submit
C:\Windows\System32\drivers\etc\hosts
Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1144-19-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1144-54-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4068-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4068-53-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4292-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4292-12-0x0000000000400000-0x0000000000411000-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