5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

General

Target

NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
Size

42KB
MD5

6b350b9a1e7019e20a5a58154c0da5f0
SHA1

a31bdc6b6e73477f6a33aa97950c0c26f988b940
SHA256

5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc
SHA512

40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e
SSDEEP

768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQvWI:RUNHFKQbIkHvGkAE

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\{51494146-4147-584b-5149-41464147584b}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{51494146-4147-584b-5149-41464147584b}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{51494146-4147-584b-5149-41464147584b}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{51494146-4147-584b-5149-41464147584b}\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Windows\\system32\\ntdbg.exe"	rmass.exe
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

Executes dropped EXE 2 IoCs

pid	Process
2536	rmass.exe
1848	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\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

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\rmass.exe	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
File opened for modification	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\RECOVER32.DLL	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	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
File created	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

Drops file in Program Files directory 3 IoCs

description	ioc	Process
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
File opened for modification	C:\Program Files (x86)\Common Files\System\aset32.exe	rmass.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2536	rmass.exe
2536	rmass.exe
2536	rmass.exe
2536	rmass.exe
2536	rmass.exe
1848	rmass.exe
2536	rmass.exe
1848	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3512	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
Token: SeDebugPrivilege	2536	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3512 wrote to memory of 2536	3512	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe	87
PID 3512 wrote to memory of 2536	3512	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe	87
PID 3512 wrote to memory of 2536	3512	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe	87
PID 2536 wrote to memory of 1848	2536	rmass.exe	88
PID 2536 wrote to memory of 1848	2536	rmass.exe	88
PID 2536 wrote to memory of 1848	2536	rmass.exe	88
PID 2536 wrote to memory of 632	2536	rmass.exe	79
PID 2536 wrote to memory of 3108	2536	rmass.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3108
- C:\Users\Admin\AppData\Local\Temp\NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3512
- - 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:2536
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1848

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:632

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

Replay Monitor

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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
44KB

MD5
c7d4ea79f017add9cbd47db5b952b321

SHA1
4b24b8f14ce6530364d6bf5ae332c710470f490b

SHA256
0f1cb1c1f731197976c3ef25a9a81a5f64ec6156bbe903be3a6788cd2905849f

SHA512
28cba47a64cd32c29b6398be20d9c9a3c072202b721e72b9719b7c6bf1d14bae7d368249cc0b1d43cdd79aedfb656bc3b48a44dace7366fa65534ff57a963801

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

Filesize
45KB

MD5
b5fb417682831bfa4e9eeed3ff875d83

SHA1
348e6bce06a2b5b97f1bb19e4780837cd333116e

SHA256
a67794e403a64756b062c8288780297a5d99c6b33d1e0d92af49586afbf9eb41

SHA512
3ed53a6b49b0c68a244d23684f78d9d5448dc72993ee22ff9cef988e7bf7d63faa47ddb72157418de1198083f85e43bbf3041dfe5495e45c745562ade74bde3a

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

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

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

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

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

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/3512-6-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads