be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee

General

Target

be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe
Size

24KB
MD5

d4ad258d7f1ee59c0c0dd035908cb4d3
SHA1

6299209cc85fd1aa05afd82bd161f0cdac1cee97
SHA256

be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee
SHA512

16787216b62235540e30649b30f5bf156de062e8c167349aebb6fe7d8909a8ef2dc1f7826917971a9caf59bbcea11a4812927e7827927d8e0e240a3f2e81de13
SSDEEP

768:jIUGI8g5Q/lvi2vJ8wxBnxZ9V7S5BNpBoG0vJILNgZjJyL:j4Rga9vJX9rV72XSG0viJgZjUL

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\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\{4741574B-424d-4f54-4741-574B424D4f54}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4741574B-424d-4f54-4741-574B424D4f54}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4741574B-424d-4f54-4741-574B424D4f54}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4741574B-424d-4f54-4741-574B424D4f54}\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
2204	rmass.exe
4768	rmass.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023148-2.dat	upx
behavioral2/memory/2204-3-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4768-15-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/2204-76-0x0000000000400000-0x0000000000411000-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
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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
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 created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.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\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe

Drops file in Program Files directory 3 IoCs

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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2204	rmass.exe
2204	rmass.exe
2204	rmass.exe
2204	rmass.exe
2204	rmass.exe
2204	rmass.exe
4768	rmass.exe
4768	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4004 wrote to memory of 2204	4004	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe	83
PID 4004 wrote to memory of 2204	4004	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe	83
PID 4004 wrote to memory of 2204	4004	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe	83
PID 2204 wrote to memory of 616	2204	rmass.exe	5
PID 2204 wrote to memory of 3468	2204	rmass.exe	55
PID 2204 wrote to memory of 4768	2204	rmass.exe	84
PID 2204 wrote to memory of 4768	2204	rmass.exe	84
PID 2204 wrote to memory of 4768	2204	rmass.exe	84

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:616

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3468
- C:\Users\Admin\AppData\Local\Temp\be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe
  "C:\Users\Admin\AppData\Local\Temp\be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:4004
- - 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
    - 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:2204
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:4768

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

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\RECOVER32.DLL

Filesize
5KB

MD5
2b2c28a7a01f9584fe220ef84003427f

SHA1
5fc023df0b5064045eb8de7f2dbe26f07f6fec70

SHA256
9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb

SHA512
39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78

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

Filesize
24KB

MD5
a9380f982734bf772e2ab229a6d559bb

SHA1
29c37bbc459bb81f486d507bf60be89199837147

SHA256
a223013e79efd36a4cafc5cda566e3082a89b61bbd8a92f618cee3eaf557121a

SHA512
144a33cbc84bf2426f6419ea44829c980ef67a9872124dd24ae747c8e198031478ec19abcd457a66baf8762e39b211767bd019fc1cfbad502e071e4efc10c00f

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

Filesize
25KB

MD5
2eafee1cb7259b9722c6ec4da10d2260

SHA1
72682095e2a39f8d95beb8c3f413d395c763f6d9

SHA256
3d174aabd962cdae7b93146717630c8323d49912f2e5cc674612e5df62d82e68

SHA512
875fd9a6aa17c6c07f72bfce60ec125591351ebd206f82912b430055237bd63e8cf380a401ddb312cdbc8f2772ba1bb3be1861cf5416aaa763881b9b94f2b715

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

Filesize
22KB

MD5
8bf2c89470b84db099e7374fde13d56c

SHA1
9355d0b53a519d202a3f0380efba743ef6d3466f

SHA256
8fd92481f891c583c24319cb43121c5b7d4f685041949d970f5c5e4b308af747

SHA512
28c59688a376ef40bfca1de36c74cb667750f70dbe038c87f689b1bfed028ea8528c34bd4ea6148d08b2df9c86bc02e2fb68b3a957db25492ee463b96bc5012e

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/2204-3-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2204-76-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4004-5-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/4768-15-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads