5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
22-10-2023 17:21

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General

Target

NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
Size

42KB
MD5

6b350b9a1e7019e20a5a58154c0da5f0
SHA1

a31bdc6b6e73477f6a33aa97950c0c26f988b940
SHA256

5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc
SHA512

40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e
SSDEEP

768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQvWI:RUNHFKQbIkHvGkAE

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\{5552554F-5a57-4746-5552-554F5A574746}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5552554F-5a57-4746-5552-554F5A574746}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5552554F-5a57-4746-5552-554F5A574746}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5552554F-5a57-4746-5552-554F5A574746}\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
2872	rmass.exe
2668	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1180	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
1180	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
2872	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\{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 created	C:\Windows\SysWOW64\ahuy.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.6b350b9a1e7019e20a5a58154c0da5f0.exe
File opened for modification	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\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\idbg32.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.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\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
2872	rmass.exe
2872	rmass.exe
2872	rmass.exe
2668	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1180	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
Token: SeDebugPrivilege	2872	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 2872	1180	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe	28
PID 1180 wrote to memory of 2872	1180	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe	28
PID 1180 wrote to memory of 2872	1180	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe	28
PID 1180 wrote to memory of 2872	1180	NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe	28
PID 2872 wrote to memory of 420	2872	rmass.exe	2
PID 2872 wrote to memory of 1232	2872	rmass.exe	21
PID 2872 wrote to memory of 2668	2872	rmass.exe	29
PID 2872 wrote to memory of 2668	2872	rmass.exe	29
PID 2872 wrote to memory of 2668	2872	rmass.exe	29
PID 2872 wrote to memory of 2668	2872	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1232
- C:\Users\Admin\AppData\Local\Temp\NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.6b350b9a1e7019e20a5a58154c0da5f0.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1180
- - 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:2872
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2668

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
6c41333dfabf6beb2491050638f50872

SHA1
b08dc3eb0c22126d21f56caf51dd2c3a5dc37fa6

SHA256
6fb7b9c93c626ac1c6674faa0acd71dcca32a9a58c785fabf95c8ff5fa0670bb

SHA512
a85a0487666d8aee76d027ebd2aa0a1ebe35aa8ed784bf53fd17697dadf071e11bcf4f4bfab476acd1fbef6ec35fe63e1574c06030f92e21bf1ed6f33e323eb7

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

Filesize
45KB

MD5
44999070740b83ae1cb8e9459e2edeb7

SHA1
e233e8c094e02d9b55c1504f9a13c6218923cecc

SHA256
4e9fa40a3f03c6779ed2fbb051455a0263810e664e554dcb574f44c349f83556

SHA512
d64b90c2448fa3ea3bf0d8b361cea09e52c7b41a02e87d0f2aa5eba95330e666a7b8de5fe67ebf504193fae5852dcffb5bbd10fa474bd719dc2aa4c3523997a6

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

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

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

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

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

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

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

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

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
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
42KB

MD5
6b350b9a1e7019e20a5a58154c0da5f0

SHA1
a31bdc6b6e73477f6a33aa97950c0c26f988b940

SHA256
5406ad0762e377ca96816935dd64b643f472cdb530d0350cf3ee9799e0315dcc

SHA512
40a59624595164dbff92a64648f309808f97d69a327849bf80bc7d9b1935ea29e8c5092295559eb4be71ba6de1ccafead29157d607983dc3fc99775036bf590e

Download Submit
memory/1180-10-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2668-53-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2872-49-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download