161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93

General

Target

161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe
Size

45KB
MD5

cc60b3a26d75bd3698cf62e8bb0c73e9
SHA1

d8624de6dcc1c8fd70f4db8435589244e965c9cd
SHA256

161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93
SHA512

d49b91b4bd1037c4c61932a70f55fbeb8267408efaade11e4de2c4b75ba3a179c0994ee94e75a150b3756c08ed72c0c8cbbd064196aaccd46a7407cd964a619b
SSDEEP

768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQvKMb7r1:RUNHFKQbIkHvGkAFu7J

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

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

Boot or Logon Autostart Execution: Active Setup 2 TTPs 4 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4D475757-4159-594e-4D47-57574159594e}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4D475757-4159-594e-4D47-57574159594e}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4D475757-4159-594e-4D47-57574159594e}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4D475757-4159-594e-4D47-57574159594e}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe

Drops file in Drivers directory 1 IoCs

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

Event Triggered Execution: Image File Execution Options Injection 1 TTPs 3 IoCs

persistence

Image File Execution Options Injection

T1546.012

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

pid	Process
2184	rmass.exe
3040	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1572	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe
1572	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe
2184	rmass.exe

Windows security modification 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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

Modifies WinLogon 2 TTPs 5 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rmass.exe	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.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 opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe

Drops file in Program Files directory 3 IoCs

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

pid	Process
2184	rmass.exe
2184	rmass.exe
2184	rmass.exe
3040	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1572	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe
Token: SeDebugPrivilege	2184	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1572 wrote to memory of 2184	1572	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe	30
PID 1572 wrote to memory of 2184	1572	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe	30
PID 1572 wrote to memory of 2184	1572	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe	30
PID 1572 wrote to memory of 2184	1572	161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe	30
PID 2184 wrote to memory of 432	2184	rmass.exe	5
PID 2184 wrote to memory of 1196	2184	rmass.exe	21
PID 2184 wrote to memory of 3040	2184	rmass.exe	31
PID 2184 wrote to memory of 3040	2184	rmass.exe	31
PID 2184 wrote to memory of 3040	2184	rmass.exe	31
PID 2184 wrote to memory of 3040	2184	rmass.exe	31

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:432

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1196
- C:\Users\Admin\AppData\Local\Temp\161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe
  "C:\Users\Admin\AppData\Local\Temp\161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1572
- - C:\Windows\SysWOW64\rmass.exe
    "C:\Windows\system32\rmass.exe"
    3⤵
    - Windows security bypass
    - Boot or Logon Autostart Execution: Active Setup
    - Drops file in Drivers directory
    - Event Triggered Execution: Image File Execution Options Injection
    - 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:2184
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3040

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Winlogon Helper DLL

1

T1547.004

Event Triggered Execution

1

T1546

Image File Execution Options Injection

1

T1546.012

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Winlogon Helper DLL

1

T1547.004

Event Triggered Execution

1

T1546

Image File Execution Options Injection

1

T1546.012

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
47KB

MD5
1928d849a4e49b47b2a82837429562f7

SHA1
49427a11fe1ece01da2d89ed4017560bc1c23df1

SHA256
6e0f4072531875a058e569d05d3b363273a7566b9d6b84ebb12de14c183b66f3

SHA512
8258761c751b323c3c852f314afba2d4c766d3f1962f0d54d7c646c59a995b13fbb684a34967c816c18602679e9bdb96b2ea1a135d67bcbfc536557793b51452

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

Filesize
48KB

MD5
e65b1b2a36d600797f5d5ce8d65767f3

SHA1
375bce3062039c754bb9a3f213a3e4d8fd625198

SHA256
5b3663d9563ef09c1a9083dcfa383ca21c9bb264abe10ed6bd91f4ab59e37f27

SHA512
0917de847afd453bbe038a1258664f00bc46ce1d1aca619a7910b4da95bd7b9b99e31e3bbc345a6a3e1b152fe4ada095593a9b515a8d5f49fff923219f310abd

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

Filesize
45KB

MD5
cc60b3a26d75bd3698cf62e8bb0c73e9

SHA1
d8624de6dcc1c8fd70f4db8435589244e965c9cd

SHA256
161808cf2c7e8288bbd15b60bdbd0afc4d568f5d0eebc959278ed25eb1f04c93

SHA512
d49b91b4bd1037c4c61932a70f55fbeb8267408efaade11e4de2c4b75ba3a179c0994ee94e75a150b3756c08ed72c0c8cbbd064196aaccd46a7407cd964a619b

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

Filesize
1KB

MD5
b10b13206b0f2cf3968050072f6979bf

SHA1
699db21ba9cecf3f13ac3d76e22cfa41aa94da80

SHA256
0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

SHA512
d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

Download Submit
memory/1572-9-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2184-55-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3040-56-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads