220d766efc4fbecb786b685caeb9c68508540c280116516d2a7ca3af70f4ad1b

General

Target

NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe
Size

19KB
MD5

501f0d9d1b191c753fc9be94be209720
SHA1

bc3b0b0a43a359065c72fb777598c9993bd6b3d1
SHA256

220d766efc4fbecb786b685caeb9c68508540c280116516d2a7ca3af70f4ad1b
SHA512

6deac1e8bba97c8d3dc1784ee9052207070a13e38753235bf1ba7d9f20714e9421f4c88327483afb4b92e13c1704ca6e32e65cc06de8ab129eaa507fabd7dcac
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXaBTkfB62:rRkiLw3HsDSARGG/2Tkp9

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
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
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
4284	rmass.exe
3948	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1072-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0007000000022e63-10.dat	upx
behavioral2/memory/1072-7-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0007000000022e63-6.dat	upx
behavioral2/files/0x0007000000022e63-5.dat	upx
behavioral2/memory/4284-41-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3948-45-0x0000000000400000-0x0000000000411000-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\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 opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	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\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 created	C:\Windows\SysWOW64\rmass.exe	NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	C:\Windows\SysWOW64\RECOVER32.DLL	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
3948	rmass.exe
3948	rmass.exe
4284	rmass.exe
4284	rmass.exe
4284	rmass.exe
4284	rmass.exe
4284	rmass.exe
4284	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1072	NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe
Token: SeDebugPrivilege	4284	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1072 wrote to memory of 4284	1072	NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe	38
PID 1072 wrote to memory of 4284	1072	NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe	38
PID 1072 wrote to memory of 4284	1072	NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe	38
PID 4284 wrote to memory of 3948	4284	rmass.exe	36
PID 4284 wrote to memory of 3948	4284	rmass.exe	36
PID 4284 wrote to memory of 3948	4284	rmass.exe	36
PID 4284 wrote to memory of 636	4284	rmass.exe	3
PID 4284 wrote to memory of 3184	4284	rmass.exe	47

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:636

C:\Users\Admin\AppData\Local\Temp\NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.501f0d9d1b191c753fc9be94be209720_JC.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1072
- C:\Windows\SysWOW64\rmass.exe
  "C:\Windows\system32\rmass.exe"
  2⤵
  - 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:4284

C:\Windows\SysWOW64\rmass.exe
--k33p
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:3948

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3184

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
8ece82aeffb501cc530600d9cbeb94bc

SHA1
a1453fdb1bc71d4a5974512f76cfe5b7d5f9ac3b

SHA256
8db6081ee6f6981ce3e83ef8aab2c340464edf3e1a6d185b2b0c744dccec7313

SHA512
2b10bd438b9af9583956d58c35ac6b132174547f93517df7f85af1bee35c26ada9ef63da1c4b69a7e717b2f9da139f5cab7956fcb3d41e5d9250b6b6be8b0507

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

Filesize
22KB

MD5
5bcbb90b9a3013e2645fa79a00680e39

SHA1
b21180e4b919837cae27060a6c238f8cadc30e32

SHA256
2f2692f4be39684a54232d3624fba461cf6af3800709f742a999da3f7e80d3b0

SHA512
cd961e1c86d7fdb729ee520c078579c2f69fc7e0a4a11d6d210b6ceeadcc7d45ed66655b9db3b2d9c293f653baed718cddd2f18cef95349d31c379cce7a7fb90

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

Filesize
19KB

MD5
501f0d9d1b191c753fc9be94be209720

SHA1
bc3b0b0a43a359065c72fb777598c9993bd6b3d1

SHA256
220d766efc4fbecb786b685caeb9c68508540c280116516d2a7ca3af70f4ad1b

SHA512
6deac1e8bba97c8d3dc1784ee9052207070a13e38753235bf1ba7d9f20714e9421f4c88327483afb4b92e13c1704ca6e32e65cc06de8ab129eaa507fabd7dcac

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

Filesize
19KB

MD5
501f0d9d1b191c753fc9be94be209720

SHA1
bc3b0b0a43a359065c72fb777598c9993bd6b3d1

SHA256
220d766efc4fbecb786b685caeb9c68508540c280116516d2a7ca3af70f4ad1b

SHA512
6deac1e8bba97c8d3dc1784ee9052207070a13e38753235bf1ba7d9f20714e9421f4c88327483afb4b92e13c1704ca6e32e65cc06de8ab129eaa507fabd7dcac

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

Filesize
19KB

MD5
501f0d9d1b191c753fc9be94be209720

SHA1
bc3b0b0a43a359065c72fb777598c9993bd6b3d1

SHA256
220d766efc4fbecb786b685caeb9c68508540c280116516d2a7ca3af70f4ad1b

SHA512
6deac1e8bba97c8d3dc1784ee9052207070a13e38753235bf1ba7d9f20714e9421f4c88327483afb4b92e13c1704ca6e32e65cc06de8ab129eaa507fabd7dcac

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1072-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1072-7-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3948-45-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4284-41-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads