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\{494B4A53-5047-494d-494B-4A535047494d}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{494B4A53-5047-494d-494B-4A535047494d}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{494B4A53-5047-494d-494B-4A535047494d}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{494B4A53-5047-494d-494B-4A535047494d}\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
1528	rmass.exe
2664	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2380	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe
2380	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe
1528	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0009000000012254-1.dat	upx
behavioral1/memory/2380-2-0x0000000000020000-0x0000000000031000-memory.dmp	upx
behavioral1/memory/1528-10-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2664-22-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1528-56-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2664-57-0x0000000000400000-0x0000000000411000-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}\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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
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	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe
File created	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\ahuy.exe	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 created	C:\Windows\SysWOW64\rmass.exe	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.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\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 4 IoCs

pid	Process
1528	rmass.exe
1528	rmass.exe
1528	rmass.exe
2664	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1528	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 1528	2380	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe	28
PID 2380 wrote to memory of 1528	2380	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe	28
PID 2380 wrote to memory of 1528	2380	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe	28
PID 2380 wrote to memory of 1528	2380	be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe	28
PID 1528 wrote to memory of 420	1528	rmass.exe	5
PID 1528 wrote to memory of 1276	1528	rmass.exe	21
PID 1528 wrote to memory of 2664	1528	rmass.exe	29
PID 1528 wrote to memory of 2664	1528	rmass.exe	29
PID 1528 wrote to memory of 2664	1528	rmass.exe	29
PID 1528 wrote to memory of 2664	1528	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:420

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1276
- C:\Users\Admin\AppData\Local\Temp\be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe
  "C:\Users\Admin\AppData\Local\Temp\be968b4ae0db04dff9eb238f51721401f619306479b031c5607990bb603fb0ee.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2380
- - 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
    - 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:1528
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2664

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
24KB

MD5
5c2e27f70dacbd5442ccb6ecae84c546

SHA1
5a4539f6136e3105ef03624cfbcb2fa2b1905a79

SHA256
54b00d258bbc18720f40e2a95ea44eea290de0d6a4eb48dca26327408664e3a9

SHA512
7bdcae14c5577c513ebff7a2514c3148e19d6c1ccd93cdc0f03e4188e03fdc8eac2e79b545a014439e8e73a43c56ec7df052e4f38c35652861c0a6193af08e99

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

Filesize
25KB

MD5
75cb0f14e9f58ca39ffe3a78f8d2446a

SHA1
fd37050e2fa9b430ae0d866698b4c836a450187f

SHA256
e3adc6d29df9f59c72e5082e69427c101a21ce3c9e171906ccadd65b229762b8

SHA512
a13731bda7770b72555354fce27341b6eeb153e0ae6618a9f44247d5c1c421c777cb2056df5f4205ec93e2e71440399c8e5cb1351b2aedb31f21f64e1512e336

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

Filesize
1KB

MD5
b10b13206b0f2cf3968050072f6979bf

SHA1
699db21ba9cecf3f13ac3d76e22cfa41aa94da80

SHA256
0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

SHA512
d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
22KB

MD5
8bf2c89470b84db099e7374fde13d56c

SHA1
9355d0b53a519d202a3f0380efba743ef6d3466f

SHA256
8fd92481f891c583c24319cb43121c5b7d4f685041949d970f5c5e4b308af747

SHA512
28c59688a376ef40bfca1de36c74cb667750f70dbe038c87f689b1bfed028ea8528c34bd4ea6148d08b2df9c86bc02e2fb68b3a957db25492ee463b96bc5012e

Download Submit
memory/1528-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1528-56-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2380-2-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download
memory/2380-8-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/2664-22-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2664-57-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads