d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f

Analysis

max time kernel
149s
max time network
132s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
05-11-2023 20:00

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General

Target

NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe
Size

19KB
MD5

9d7fa36de48e2acb2fb1f12ce50961c0
SHA1

a97f8dde719f26da0447cd501d441062c0c9bab8
SHA256

d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f
SHA512

6c096d37dad65d816788e1b8bb924ae136534423796b660647ce79101a9d6057e8678408ec187ba7e34f27da4062405fa004ed0d89059304741584906f68bad4
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX+faAe3g:rRkiLw3HsDSARGG/uJGg

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\{47475056-484d-5852-4747-5056484D5852}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{47475056-484d-5852-4747-5056484D5852}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{47475056-484d-5852-4747-5056484D5852}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{47475056-484d-5852-4747-5056484D5852}\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
2976	rmass.exe
2072	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2448	NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe
2448	NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe
2976	rmass.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2448-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000d00000001201d-4.dat	upx
behavioral1/memory/2072-25-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2976-21-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000d00000001201d-12.dat	upx
behavioral1/memory/2448-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000d00000001201d-24.dat	upx
behavioral1/files/0x000d00000001201d-22.dat	upx
behavioral1/files/0x000d00000001201d-10.dat	upx
behavioral1/files/0x000d00000001201d-7.dat	upx
behavioral1/files/0x000d00000001201d-6.dat	upx
behavioral1/memory/2976-47-0x0000000000400000-0x0000000000411000-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
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 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\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 opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe
File created	C:\Windows\SysWOW64\ntdbg.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.9d7fa36de48e2acb2fb1f12ce50961c0.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
2976	rmass.exe
2976	rmass.exe
2976	rmass.exe
2072	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2448	NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe
Token: SeDebugPrivilege	2976	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 2976	2448	NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe	28
PID 2448 wrote to memory of 2976	2448	NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe	28
PID 2448 wrote to memory of 2976	2448	NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe	28
PID 2448 wrote to memory of 2976	2448	NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe	28
PID 2976 wrote to memory of 420	2976	rmass.exe	18
PID 2976 wrote to memory of 1264	2976	rmass.exe	2
PID 2976 wrote to memory of 2072	2976	rmass.exe	29
PID 2976 wrote to memory of 2072	2976	rmass.exe	29
PID 2976 wrote to memory of 2072	2976	rmass.exe	29
PID 2976 wrote to memory of 2072	2976	rmass.exe	29

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1264
- C:\Users\Admin\AppData\Local\Temp\NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.9d7fa36de48e2acb2fb1f12ce50961c0.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2448
- - 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:2976
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2072

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

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
21KB

MD5
74536f5eb2a1be6afd08b33b5720bc93

SHA1
55e1390041c45a291dac2046ead22a6a82045441

SHA256
77fc8713b2609d549c223197dd214838c08adbe95551fa2cc4f3f2170807731d

SHA512
24980e798db3f2e12f7971882af94106b1eb4906b6fa0eabdf9980d4da566082fae5a42d72d2d36c60798956b924dda28263ee82d5c877ebd3bc0db17065c8fe

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

Filesize
22KB

MD5
f0dbda8bfdb74e46bf705673e8a83760

SHA1
6adfab42c41b5878bfe29572446e98cc32e508b2

SHA256
52a015e7eee8a4befac6fc801c8f3778b47b0646bf8953e1bfd870faa17134a0

SHA512
8b92b5f998cdcc3be2087e4c20c5e4f60ec4bc57d626a7351d1b86074e0835efcabf61c774fc893f19c5114543c9c9fcda44391d1b9791005fbc51f1129ae422

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

Filesize
19KB

MD5
9d7fa36de48e2acb2fb1f12ce50961c0

SHA1
a97f8dde719f26da0447cd501d441062c0c9bab8

SHA256
d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f

SHA512
6c096d37dad65d816788e1b8bb924ae136534423796b660647ce79101a9d6057e8678408ec187ba7e34f27da4062405fa004ed0d89059304741584906f68bad4

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

Filesize
19KB

MD5
9d7fa36de48e2acb2fb1f12ce50961c0

SHA1
a97f8dde719f26da0447cd501d441062c0c9bab8

SHA256
d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f

SHA512
6c096d37dad65d816788e1b8bb924ae136534423796b660647ce79101a9d6057e8678408ec187ba7e34f27da4062405fa004ed0d89059304741584906f68bad4

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

Filesize
19KB

MD5
9d7fa36de48e2acb2fb1f12ce50961c0

SHA1
a97f8dde719f26da0447cd501d441062c0c9bab8

SHA256
d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f

SHA512
6c096d37dad65d816788e1b8bb924ae136534423796b660647ce79101a9d6057e8678408ec187ba7e34f27da4062405fa004ed0d89059304741584906f68bad4

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

Filesize
19KB

MD5
9d7fa36de48e2acb2fb1f12ce50961c0

SHA1
a97f8dde719f26da0447cd501d441062c0c9bab8

SHA256
d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f

SHA512
6c096d37dad65d816788e1b8bb924ae136534423796b660647ce79101a9d6057e8678408ec187ba7e34f27da4062405fa004ed0d89059304741584906f68bad4

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
19KB

MD5
9d7fa36de48e2acb2fb1f12ce50961c0

SHA1
a97f8dde719f26da0447cd501d441062c0c9bab8

SHA256
d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f

SHA512
6c096d37dad65d816788e1b8bb924ae136534423796b660647ce79101a9d6057e8678408ec187ba7e34f27da4062405fa004ed0d89059304741584906f68bad4

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
9d7fa36de48e2acb2fb1f12ce50961c0

SHA1
a97f8dde719f26da0447cd501d441062c0c9bab8

SHA256
d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f

SHA512
6c096d37dad65d816788e1b8bb924ae136534423796b660647ce79101a9d6057e8678408ec187ba7e34f27da4062405fa004ed0d89059304741584906f68bad4

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
9d7fa36de48e2acb2fb1f12ce50961c0

SHA1
a97f8dde719f26da0447cd501d441062c0c9bab8

SHA256
d543eb72b7e12eec17c183bb7b93c60eb729be6941314818bffabf74b1d4258f

SHA512
6c096d37dad65d816788e1b8bb924ae136534423796b660647ce79101a9d6057e8678408ec187ba7e34f27da4062405fa004ed0d89059304741584906f68bad4

Download Submit
memory/2072-25-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2448-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2448-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2976-23-0x00000000003E0000-0x00000000003F1000-memory.dmp

Filesize
68KB

Download
memory/2976-21-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2976-47-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download