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\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\{4E515054-544d-524d-4E51-5054544D524d}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4E515054-544d-524d-4E51-5054544D524d}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4E515054-544d-524d-4E51-5054544D524d}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4E515054-544d-524d-4E51-5054544D524d}\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

872 rmass.exe
3964 rmass.exe

pid	process
872	rmass.exe
3964	rmass.exe

UPX packed file 7 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1404-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
C:\Windows\SysWOW64\rmass.exe	upx
behavioral2/memory/1404-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/872-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3964-19-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/872-53-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3964-54-0x0000000000400000-0x0000000000411000-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.exe0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.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 created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.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 8 IoCs

Processes:

rmass.exermass.exe

pid process

872 rmass.exe
872 rmass.exe
872 rmass.exe
872 rmass.exe
872 rmass.exe
872 rmass.exe
3964 rmass.exe
3964 rmass.exe

pid	process
872	rmass.exe
872	rmass.exe
872	rmass.exe
872	rmass.exe
872	rmass.exe
872	rmass.exe
3964	rmass.exe
3964	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exermass.exe

description	pid	process
Token: SeDebugPrivilege	1404	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
Token: SeDebugPrivilege	872	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exermass.exe

description	pid	process	target process
PID 1404 wrote to memory of 872	1404	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe	rmass.exe
PID 1404 wrote to memory of 872	1404	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe	rmass.exe
PID 1404 wrote to memory of 872	1404	0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe	rmass.exe
PID 872 wrote to memory of 604	872	rmass.exe	winlogon.exe
PID 872 wrote to memory of 3448	872	rmass.exe	Explorer.EXE
PID 872 wrote to memory of 3964	872	rmass.exe	rmass.exe
PID 872 wrote to memory of 3964	872	rmass.exe	rmass.exe
PID 872 wrote to memory of 3964	872	rmass.exe	rmass.exe

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:604

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3448

C:\Users\Admin\AppData\Local\Temp\0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe
"C:\Users\Admin\AppData\Local\Temp\0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd.exe"
2⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1404

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:872

C:\Windows\SysWOW64\rmass.exe
--k33p
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:3964

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
24KB

MD5
6c93deb4819f29d8043666b0ca1c21bf

SHA1
fc56a7fc6f121fc4c963ced570f6a06b630e7511

SHA256
0722943d11793ed6868b58bf69cd70d59971ae8324e4fe3624e5f40e9205c563

SHA512
88c5a6dc59bdf49e0a79bf27dcf1c153cf08b05260769651a6771bf129871562739f23234da0633915c84ab2fff2c8786315cc6e85c86dbd8df3f580fde07b14

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

MD5
9dadab3edfa12caa867c663ced5b9f71

SHA1
74367fd1b83522faad6b05ae7a7a2a0608b695e2

SHA256
1e01d24a828a2ec303c1071b09d1253f46c5ca3013aaed9f5b0fa349b73bacf8

SHA512
71b7b25009232931703c9c11b53403e3c9e8f8823e35ad6087c2e46346a7284ad645611502b898a263f8176541f405fbe17f056efe542a41b67aabdca87fbc15

Download Submit
C:\Windows\SysWOW64\rmass.exe
Filesize
22KB

MD5
cf4d9e5de61275e0bb616da00003c8a0

SHA1
fd37bdad037cc2d30e44137e9033301102a2b2a7

SHA256
0747fd647f4b9c8b6749bfad83df17c294f99ce32c41398796d597de3c0f8efd

SHA512
edb0a55f8ec55927322a1322c0a60bd2ffa0e89c960b5861b5f5286aadeb922513d06577ba720ebf2c0913577cb66ec4021ee33c9eeb891b87e192d68a572c1d

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

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/872-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/872-53-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1404-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1404-12-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3964-19-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3964-54-0x0000000000400000-0x0000000000411000-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