508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a

General

Target

508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe
Size

46KB
MD5

861af7e40d3735bc41227706c038ad85
SHA1

a88606b1c5cfcba537ebee675d774833ce6fcd8a
SHA256

508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a
SHA512

752ef6dcb9b81b2793da81f65ab3ae577ef918648ceb5879849ec1211f337a79ce2be29bdd5290b49afefed5af0f9f14f5dad03416ae76564927dc525a137c4e
SSDEEP

768:jIUk75vHgChlWCQGJmtP3UYEwgODEaXHokp8Hq:jsgCXQkmtPIlODEaXHx8Hq

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\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

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

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{484B554C-4249-4255-484B-554C42494255}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{484B554C-4249-4255-484B-554C42494255}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{484B554C-4249-4255-484B-554C42494255}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{484B554C-4249-4255-484B-554C42494255}\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

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
2684	rmass.exe
1936	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2020	508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe
2020	508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe
2684	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
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 created	C:\Windows\SysWOW64\ahuy.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\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe
File created	C:\Windows\SysWOW64\rmass.exe	508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.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\winrnt.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

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
2684	rmass.exe
2684	rmass.exe
2684	rmass.exe
1936	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2684	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 2684	2020	508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe	28
PID 2020 wrote to memory of 2684	2020	508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe	28
PID 2020 wrote to memory of 2684	2020	508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe	28
PID 2020 wrote to memory of 2684	2020	508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe	28
PID 2684 wrote to memory of 436	2684	rmass.exe	5
PID 2684 wrote to memory of 1176	2684	rmass.exe	21
PID 2684 wrote to memory of 1936	2684	rmass.exe	29
PID 2684 wrote to memory of 1936	2684	rmass.exe	29
PID 2684 wrote to memory of 1936	2684	rmass.exe	29
PID 2684 wrote to memory of 1936	2684	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:436

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1176
- C:\Users\Admin\AppData\Local\Temp\508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe
  "C:\Users\Admin\AppData\Local\Temp\508ed71dfae8b32b3a72a053b2a7f29c99e43b124848ca77dd335f7c6ad9349a.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2020
- - C:\Windows\SysWOW64\rmass.exe
    "C:\Windows\SysWOW64\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:2684
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

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
94d75d1e7735b19d85e9d1ecfce7f205

SHA1
9c8bda04060530675ca05f3169bcec3748c89c9f

SHA256
95caf821a5146cfcb09ab5fb61098807700c40059b4c7b39f4588f07b483bbfe

SHA512
cec5fa456bcc3e5539d966d60532f2f6817d76a312af37cd6bc8015a45fddbfd653b4d111337e94e1e12581d0a4d14fa47802f5dba9b33d5ff56ca2771901f89

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

Filesize
47KB

MD5
d580dd97342792ecc285612e8dcb46dc

SHA1
5ef23c65ecdc386b1d7e7bc0f923350d94f9638e

SHA256
98ccf01bdcb052df4bda39295af4b16c2283e3240108cc3dfb91ec21b84ba3d5

SHA512
aad996b564f78160e184ae9239323735a6a7938c6ec4c570008b949bf4bf9410d4cd692df50b624c9fe37bc3b5752a4c7f4cb47660c2ea87f82aa45b87adcdd5

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
2afd9be383a02e0ae84a0c3545968f3b

SHA1
28aa75884a2988163444fdf8149c8b0917858a54

SHA256
1b659ee83b86cd8d7cf37eb6724f8dbb531e9c3d19c2e679137cd4ec459d946a

SHA512
f6075701a5e0cd3ab083a32703ef1d84ff3d4fddffd95e21af51c30e9c9456f161ad04b0fb76b036a872be5f1f3132c3768aa458f7a8071ed831e6a9d72d48e1

Download Submit
memory/1936-54-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2020-7-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/2684-53-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads