a4ca4ee77ab1f9535276471ed2ac831421648201771920a4c700c7d307eb459e

General

Target

NEAS.1d216b068ab71ecca2551e8bb57e02d7.exe
Size

19KB
MD5

1d216b068ab71ecca2551e8bb57e02d7
SHA1

f923383e8c0f472822d92513b8e990140555146b
SHA256

a4ca4ee77ab1f9535276471ed2ac831421648201771920a4c700c7d307eb459e
SHA512

d8c05ac93cd0823acede9deed8e67b13b7fb6a1739c70fe1447c024619a48cc40495fc822e829f34873a4e3bce3a28df80d9ba8e1f5a8ce6b931b7d555bce092
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXKN:rRkiLw3HsDSARGG/6N

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

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

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
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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{51494146-4147-584b-5149-41464147584b}	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
932	rmass.exe
4460	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4524-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000500000001e9bf-5.dat	upx
behavioral2/memory/4524-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000500000001e9bf-7.dat	upx
behavioral2/files/0x000500000001e9bf-12.dat	upx
behavioral2/memory/4460-17-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/932-42-0x0000000000400000-0x0000000000411000-memory.dmp	upx

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\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

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.1d216b068ab71ecca2551e8bb57e02d7.exe
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.1d216b068ab71ecca2551e8bb57e02d7.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\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\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 8 IoCs

pid	Process
932	rmass.exe
932	rmass.exe
932	rmass.exe
932	rmass.exe
932	rmass.exe
932	rmass.exe
4460	rmass.exe
4460	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4524	NEAS.1d216b068ab71ecca2551e8bb57e02d7.exe
Token: SeDebugPrivilege	932	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4524 wrote to memory of 932	4524	NEAS.1d216b068ab71ecca2551e8bb57e02d7.exe	87
PID 4524 wrote to memory of 932	4524	NEAS.1d216b068ab71ecca2551e8bb57e02d7.exe	87
PID 4524 wrote to memory of 932	4524	NEAS.1d216b068ab71ecca2551e8bb57e02d7.exe	87
PID 932 wrote to memory of 600	932	rmass.exe	3
PID 932 wrote to memory of 4460	932	rmass.exe	88
PID 932 wrote to memory of 4460	932	rmass.exe	88
PID 932 wrote to memory of 4460	932	rmass.exe	88
PID 932 wrote to memory of 3340	932	rmass.exe	39

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:600

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3340
- C:\Users\Admin\AppData\Local\Temp\NEAS.1d216b068ab71ecca2551e8bb57e02d7.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.1d216b068ab71ecca2551e8bb57e02d7.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4524
- - 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:932
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:4460

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
21KB

MD5
6c618b0dcf3a76e46a47014bc4058e92

SHA1
5d5a6c0396cc5217355b74c1a3607cbe5d87d10e

SHA256
c900e72f92c55f5c2e9195d07d9b1d9235c28fe829b6b45f64a60148ec043174

SHA512
7648201663eb57f29005dfb47edeb5ca1718d5449a1cc854a3e34c71009048b6738b86bb248520a2a84d100e6936ad1f66852462f6b3c2a1d3388ddb3bed3604

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

Filesize
22KB

MD5
4bbb15a12cfe42fda3b6c093d2e70403

SHA1
cf5b89313c031bb4fdbb134629143ace40b6a7bb

SHA256
da911f5c61dbd63bd421eaa4a0515e43b78f09ca447c00ad53e1efd29f89db4d

SHA512
305f00e0b4aa077146297d27b92a132efc6ce29ffca5b7d193d9508aa0ed56ca3b1e889f6bab0d7015b04a83fe143d2dfc504a9c0168014549bae3a6ed27f406

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

Filesize
19KB

MD5
1d216b068ab71ecca2551e8bb57e02d7

SHA1
f923383e8c0f472822d92513b8e990140555146b

SHA256
a4ca4ee77ab1f9535276471ed2ac831421648201771920a4c700c7d307eb459e

SHA512
d8c05ac93cd0823acede9deed8e67b13b7fb6a1739c70fe1447c024619a48cc40495fc822e829f34873a4e3bce3a28df80d9ba8e1f5a8ce6b931b7d555bce092

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

Filesize
19KB

MD5
1d216b068ab71ecca2551e8bb57e02d7

SHA1
f923383e8c0f472822d92513b8e990140555146b

SHA256
a4ca4ee77ab1f9535276471ed2ac831421648201771920a4c700c7d307eb459e

SHA512
d8c05ac93cd0823acede9deed8e67b13b7fb6a1739c70fe1447c024619a48cc40495fc822e829f34873a4e3bce3a28df80d9ba8e1f5a8ce6b931b7d555bce092

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

Filesize
19KB

MD5
1d216b068ab71ecca2551e8bb57e02d7

SHA1
f923383e8c0f472822d92513b8e990140555146b

SHA256
a4ca4ee77ab1f9535276471ed2ac831421648201771920a4c700c7d307eb459e

SHA512
d8c05ac93cd0823acede9deed8e67b13b7fb6a1739c70fe1447c024619a48cc40495fc822e829f34873a4e3bce3a28df80d9ba8e1f5a8ce6b931b7d555bce092

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/932-42-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4460-17-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4524-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4524-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads