8d1d303ff2b477b6918fec46e0088a06e2fee1e0a7c7c0ce6ff6c8105de49a2f

Analysis

max time kernel
148s
max time network
124s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
01/11/2023, 09:31

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General

Target

NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe
Size

44KB
MD5

296de4a4a72d3404623bfefb6db243b0
SHA1

60151f8b9111b5e0114cb5690af1d9db78533674
SHA256

8d1d303ff2b477b6918fec46e0088a06e2fee1e0a7c7c0ce6ff6c8105de49a2f
SHA512

32d7410e98a6083cdcecc239bf558382acccec10b8536731dba2098878e0f2dc531067faa2bf482a876fcc86e6e5218ecf31ae6349179d221d29c7fd51a6baf3
SSDEEP

768:jIUp2iP0n1gMLsq2DwXfisMeNgBMi3Hm/9FLxLQdKhrsDmYyzc:j/MLZXfXfG5m/9RxL+isZ

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}	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
2296	rmass.exe
2632	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2152	NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe
2152	NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe
2296	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
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
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}	rmass.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.296de4a4a72d3404623bfefb6db243b0_JC.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\RECOVER32.DLL	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	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.296de4a4a72d3404623bfefb6db243b0_JC.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
File opened for modification	C:\Windows\SysWOW64\winrnt.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\idbg32.exe	rmass.exe
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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2296	rmass.exe
2296	rmass.exe
2296	rmass.exe
2632	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2296	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 2296	2152	NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe	28
PID 2152 wrote to memory of 2296	2152	NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe	28
PID 2152 wrote to memory of 2296	2152	NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe	28
PID 2152 wrote to memory of 2296	2152	NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe	28
PID 2296 wrote to memory of 420	2296	rmass.exe	2
PID 2296 wrote to memory of 1208	2296	rmass.exe	12
PID 2296 wrote to memory of 2632	2296	rmass.exe	29
PID 2296 wrote to memory of 2632	2296	rmass.exe	29
PID 2296 wrote to memory of 2632	2296	rmass.exe	29
PID 2296 wrote to memory of 2632	2296	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1208
- C:\Users\Admin\AppData\Local\Temp\NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.296de4a4a72d3404623bfefb6db243b0_JC.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2152
- - 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:2296
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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
44KB

MD5
a1250a4c982105c34b8673db20d57bfd

SHA1
92ca9f50bd20ceff9c47cc87e56ecc3d0e2751c7

SHA256
bbcf4908d31670d91144051646dc654898a00b31def8dbc539b852023c6c0381

SHA512
6d8795583df0d6a6bb5072fb8f3534bb244ac2e82b2f89a39536293e0a4bee7ce6c5436bb8d80d9cc023788fdf839de4eabe0a90fd7e56c5d2eab50c7e16eb3f

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

Filesize
45KB

MD5
bbe62e076f14fe88b6a07f51da2a24ef

SHA1
a211275c0df57b0c0472cf57d1039597d3f41486

SHA256
224ab0132f7ede25f621dfd5c090307740c217a796326d3ee3fafa63ef72a78a

SHA512
6dd831c1720d40fc4a7ae0a5d812161f3b1f9243b790801c73d962c14e8cacf7314c5dcc5a66a2c4bdd814826c2ed6efc8a015c521ab1844678722c6f5c69862

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

Filesize
42KB

MD5
2005c9a997b69995cc42c88e528d3d37

SHA1
d0d393d0619fe787a41a3051e4fed103260180d9

SHA256
3f9d737a7cc9f4080bde796cdfd620aeaf7da041d7fed4f66dea170d73642c07

SHA512
a3cc94c07c50dc6199657317f3fea1067c3fce2cdd95c666ad64c87a9a58ebbd215bc1cbea6cbbc9542423571e056710f514b41492460762d25900bd1c9cfb93

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

Filesize
42KB

MD5
2005c9a997b69995cc42c88e528d3d37

SHA1
d0d393d0619fe787a41a3051e4fed103260180d9

SHA256
3f9d737a7cc9f4080bde796cdfd620aeaf7da041d7fed4f66dea170d73642c07

SHA512
a3cc94c07c50dc6199657317f3fea1067c3fce2cdd95c666ad64c87a9a58ebbd215bc1cbea6cbbc9542423571e056710f514b41492460762d25900bd1c9cfb93

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

Filesize
42KB

MD5
2005c9a997b69995cc42c88e528d3d37

SHA1
d0d393d0619fe787a41a3051e4fed103260180d9

SHA256
3f9d737a7cc9f4080bde796cdfd620aeaf7da041d7fed4f66dea170d73642c07

SHA512
a3cc94c07c50dc6199657317f3fea1067c3fce2cdd95c666ad64c87a9a58ebbd215bc1cbea6cbbc9542423571e056710f514b41492460762d25900bd1c9cfb93

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

Filesize
42KB

MD5
2005c9a997b69995cc42c88e528d3d37

SHA1
d0d393d0619fe787a41a3051e4fed103260180d9

SHA256
3f9d737a7cc9f4080bde796cdfd620aeaf7da041d7fed4f66dea170d73642c07

SHA512
a3cc94c07c50dc6199657317f3fea1067c3fce2cdd95c666ad64c87a9a58ebbd215bc1cbea6cbbc9542423571e056710f514b41492460762d25900bd1c9cfb93

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
42KB

MD5
2005c9a997b69995cc42c88e528d3d37

SHA1
d0d393d0619fe787a41a3051e4fed103260180d9

SHA256
3f9d737a7cc9f4080bde796cdfd620aeaf7da041d7fed4f66dea170d73642c07

SHA512
a3cc94c07c50dc6199657317f3fea1067c3fce2cdd95c666ad64c87a9a58ebbd215bc1cbea6cbbc9542423571e056710f514b41492460762d25900bd1c9cfb93

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
42KB

MD5
2005c9a997b69995cc42c88e528d3d37

SHA1
d0d393d0619fe787a41a3051e4fed103260180d9

SHA256
3f9d737a7cc9f4080bde796cdfd620aeaf7da041d7fed4f66dea170d73642c07

SHA512
a3cc94c07c50dc6199657317f3fea1067c3fce2cdd95c666ad64c87a9a58ebbd215bc1cbea6cbbc9542423571e056710f514b41492460762d25900bd1c9cfb93

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
42KB

MD5
2005c9a997b69995cc42c88e528d3d37

SHA1
d0d393d0619fe787a41a3051e4fed103260180d9

SHA256
3f9d737a7cc9f4080bde796cdfd620aeaf7da041d7fed4f66dea170d73642c07

SHA512
a3cc94c07c50dc6199657317f3fea1067c3fce2cdd95c666ad64c87a9a58ebbd215bc1cbea6cbbc9542423571e056710f514b41492460762d25900bd1c9cfb93

Download Submit
memory/2152-7-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/2296-50-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2632-51-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download