9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4

General

Target

9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe
Size

45KB
MD5

6c215a99d9586927e04666e721351f8d
SHA1

4ab926a88fb3e12e6bc953cc93601ca6c6edc683
SHA256

9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4
SHA512

20d096e5ed14cd1cbc2cc8506539939b404588458cbad478f83b33135b32a0d92e17d7f1b33b1aebbc21b42e718ebb7672171f5824915b7e0033abd9d9bcc5b2
SSDEEP

768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQvKMb7r5i:RUNHFKQbIkHvGkAFu7di

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\{55485251-4b4a-4350-5548-52514B4A4350}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{55485251-4b4a-4350-5548-52514B4A4350}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{55485251-4b4a-4350-5548-52514B4A4350}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{55485251-4b4a-4350-5548-52514B4A4350}\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
2088	rmass.exe
3020	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2976	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe
2976	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe
2088	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\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
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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
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\rmass.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\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\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe
File created	C:\Windows\SysWOW64\rmass.exe	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.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
2088	rmass.exe
2088	rmass.exe
2088	rmass.exe
3020	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2976	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe
Token: SeDebugPrivilege	2088	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2088	2976	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe	28
PID 2976 wrote to memory of 2088	2976	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe	28
PID 2976 wrote to memory of 2088	2976	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe	28
PID 2976 wrote to memory of 2088	2976	9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe	28
PID 2088 wrote to memory of 428	2088	rmass.exe	5
PID 2088 wrote to memory of 1180	2088	rmass.exe	21
PID 2088 wrote to memory of 3020	2088	rmass.exe	29
PID 2088 wrote to memory of 3020	2088	rmass.exe	29
PID 2088 wrote to memory of 3020	2088	rmass.exe	29
PID 2088 wrote to memory of 3020	2088	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:428

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1180
- C:\Users\Admin\AppData\Local\Temp\9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe
  "C:\Users\Admin\AppData\Local\Temp\9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2976
- - 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
    - 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:2088
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3020

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
47KB

MD5
e5e1aa31d570c9c828105cfb1f698b62

SHA1
ea804d5240193b8b23d016701401c1fc652400d0

SHA256
2c0d522714e8157ce673478a7b1321c0ae8407a7e07eec338c7cfbb3f5c98342

SHA512
f3f9b7494a8935b66c9d76b4c19b022bf33515c7c2132e23e4fc7536fad50882b93f4467177497d56af459eab3f5d3d8f5830af75fedc37be097b45f78801b27

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

Filesize
48KB

MD5
fb239f2a221d94ccbe23345de15bfc17

SHA1
c1440a0b885d993e4f91c71fefc789078ccb0c78

SHA256
f5bfc19b01f9afe24792bc5a3620c520de5f9a4fd39637dd65893119cad735c6

SHA512
8915f27d3b3d3f48b8dbb1cc81c6a79327c1c6b1a8c470a006b22169c343221439762958b0d803294498953f98ddff0813f658d092976fd028da2cd6485aebe3

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

Filesize
45KB

MD5
6c215a99d9586927e04666e721351f8d

SHA1
4ab926a88fb3e12e6bc953cc93601ca6c6edc683

SHA256
9ee434155c44ab518d8c1bc255c40da8de748d6c3e29bee7e7e928411e65dbc4

SHA512
20d096e5ed14cd1cbc2cc8506539939b404588458cbad478f83b33135b32a0d92e17d7f1b33b1aebbc21b42e718ebb7672171f5824915b7e0033abd9d9bcc5b2

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

Filesize
1KB

MD5
b10b13206b0f2cf3968050072f6979bf

SHA1
699db21ba9cecf3f13ac3d76e22cfa41aa94da80

SHA256
0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

SHA512
d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

Download Submit
memory/2088-55-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2976-9-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3020-56-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads