922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47

General

Target

922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe
Size

44KB
MD5

2e748a8ae1adc80153fea098e911d72b
SHA1

5c20ece6830458d8105e19bf9704a69bab6204dc
SHA256

922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47
SHA512

5d11961e920add51df7a6c42fecb95c452d3629da0415211f90c4c45d2371243a1cd4c473436009748253d38ace246834ce6480378977963244d99aa85744c48
SSDEEP

768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQv04dS:RUNHFKQbIkHvGkAM4

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\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

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\{4D564659-5a50-4c4d-4D56-46595A504c4d}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4D564659-5a50-4c4d-4D56-46595A504c4d}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4D564659-5a50-4c4d-4D56-46595A504c4d}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4D564659-5a50-4c4d-4D56-46595A504c4d}\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
2196	rmass.exe
2580	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2968	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe
2968	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe
2196	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\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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "5120"	rmass.exe

Modifies WinLogon 2 TTPs 5 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

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

description	ioc	Process
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\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\winrnt.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	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe
File created	C:\Windows\SysWOW64\rmass.exe	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	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
2580	rmass.exe
2196	rmass.exe
2196	rmass.exe
2196	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2968	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe
Token: SeDebugPrivilege	2196	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 2196	2968	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe	29
PID 2968 wrote to memory of 2196	2968	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe	29
PID 2968 wrote to memory of 2196	2968	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe	29
PID 2968 wrote to memory of 2196	2968	922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe	29
PID 2196 wrote to memory of 2580	2196	rmass.exe	30
PID 2196 wrote to memory of 2580	2196	rmass.exe	30
PID 2196 wrote to memory of 2580	2196	rmass.exe	30
PID 2196 wrote to memory of 2580	2196	rmass.exe	30
PID 2196 wrote to memory of 420	2196	rmass.exe	5
PID 2196 wrote to memory of 1392	2196	rmass.exe	20

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:420

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1392
- C:\Users\Admin\AppData\Local\Temp\922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe
  "C:\Users\Admin\AppData\Local\Temp\922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2968
- - 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:2196
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2580

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
46KB

MD5
cce528125d11c0b0a5502adcd818c9c7

SHA1
1931614a94e209c31ce7d23ad21e4c3cb918b8de

SHA256
990a31c47136c8b770824923d932e518bd4698bc66ab54796d9b0f40098bdb70

SHA512
53fef30f37cfa9838a2a228738593b2084c4a2b92f9c36805c6f277ad007b15fbef846546da95a193183bbe4d13cd79dbe7eb51d6ce19f2b43f996e7b50efea2

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

Filesize
47KB

MD5
20700473c41061efa23e679e3a863a1a

SHA1
ea3751838b08b43b61d4168de21da2c097c2c414

SHA256
09bae1bc8c74ecc134a56d6a459de8c385a023d88b62fb0e281f0d15ce0e6cc1

SHA512
99806261d420622f5e651d9c6683a82246b88a5c90fc673641205b1864c262df20c9bbb5391f4297e6944981f3db22cbfed5fac2722792a241580340be2b8370

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
44KB

MD5
2e748a8ae1adc80153fea098e911d72b

SHA1
5c20ece6830458d8105e19bf9704a69bab6204dc

SHA256
922ccb2a570536d4c9ad7fbb3302c8ade7d68e2c069927a1f5287ab2c832ed47

SHA512
5d11961e920add51df7a6c42fecb95c452d3629da0415211f90c4c45d2371243a1cd4c473436009748253d38ace246834ce6480378977963244d99aa85744c48

Download Submit
memory/2196-52-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2580-53-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2968-9-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads