472d77a481d45fa635611896f951ffc8d87a1e4a1f773e0a3f80238694058fac

Analysis

max time kernel
151s
max time network
127s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
16/10/2023, 18:23

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General

Target

NEAS.664a30a43fbad4d1c8219e450a917950.exe
Size

20KB
MD5

664a30a43fbad4d1c8219e450a917950
SHA1

8a4c6c6bfedb651c2a027af10447cccc681da1f0
SHA256

472d77a481d45fa635611896f951ffc8d87a1e4a1f773e0a3f80238694058fac
SHA512

86ecca6bd35f0183a68bf9d419cd28b79c5dc29c13035a2c35e1c23c8bc99694a35856e0cdc502e14fa8eabe445dd7cd48106bec5772eadb4bf5e22af191789a
SSDEEP

384:jIz4Apz1qbyU6IBsdZzpfucfoGXxDCsfwa2qPXknPmddwV3QW:jIUmz0bJ6AszzpmqxdfR2YU+ddwVB

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\UpdatesDisableNotify = "5120"	rmass.exe
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

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\{5A574B51-4849-5742-5A57-4B5148495742}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5A574B51-4849-5742-5A57-4B5148495742}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5A574B51-4849-5742-5A57-4B5148495742}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5A574B51-4849-5742-5A57-4B5148495742}\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Windows\\system32\\ntdbg.exe"	rmass.exe
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

Executes dropped EXE 2 IoCs

pid	Process
2088	rmass.exe
2548	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1672	NEAS.664a30a43fbad4d1c8219e450a917950.exe
1672	NEAS.664a30a43fbad4d1c8219e450a917950.exe
2088	rmass.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00070000000120e4-1.dat	upx
behavioral1/memory/1672-2-0x0000000000020000-0x0000000000031000-memory.dmp	upx
behavioral1/files/0x00070000000120e4-10.dat	upx
behavioral1/files/0x00070000000120e4-7.dat	upx
behavioral1/files/0x00070000000120e4-4.dat	upx
behavioral1/memory/2088-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x00070000000120e4-12.dat	upx
behavioral1/files/0x00070000000120e4-22.dat	upx
behavioral1/files/0x00070000000120e4-17.dat	upx
behavioral1/memory/2548-24-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2088-49-0x0000000000400000-0x0000000000411000-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	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\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\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.664a30a43fbad4d1c8219e450a917950.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.664a30a43fbad4d1c8219e450a917950.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.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\idbg32.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
2088	rmass.exe
2088	rmass.exe
2088	rmass.exe
2548	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2088	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 2088	1672	NEAS.664a30a43fbad4d1c8219e450a917950.exe	28
PID 1672 wrote to memory of 2088	1672	NEAS.664a30a43fbad4d1c8219e450a917950.exe	28
PID 1672 wrote to memory of 2088	1672	NEAS.664a30a43fbad4d1c8219e450a917950.exe	28
PID 1672 wrote to memory of 2088	1672	NEAS.664a30a43fbad4d1c8219e450a917950.exe	28
PID 2088 wrote to memory of 420	2088	rmass.exe	4
PID 2088 wrote to memory of 1400	2088	rmass.exe	17
PID 2088 wrote to memory of 2548	2088	rmass.exe	29
PID 2088 wrote to memory of 2548	2088	rmass.exe	29
PID 2088 wrote to memory of 2548	2088	rmass.exe	29
PID 2088 wrote to memory of 2548	2088	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1400
- C:\Users\Admin\AppData\Local\Temp\NEAS.664a30a43fbad4d1c8219e450a917950.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.664a30a43fbad4d1c8219e450a917950.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1672
- - 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:2088
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2548

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
20KB

MD5
dab92e19b0f4324d48aa45942464167a

SHA1
cd2b95cf9831b011cbfe56861e413d4ac5dab79b

SHA256
5b026d9aed46ddc672719e521eaf8f3d7ef4b4c3edfdc959944d15e2bdb10617

SHA512
db6f035730538af9cd40ca58a3a21a7b2f82a39a253523ddf7b9a01a51788fc09b3de0f1d1e863c706dd44646fd9ccc296f35a9ab435f3beb8f8ff9e326504ff

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

Filesize
21KB

MD5
52df7f75423b76f7da5beac6b107628b

SHA1
815424cb525c8a3682a0b9ed90f2b2db145ddeb0

SHA256
c97192520b8248c4622f015272b1b10ea99754eef6f07301e7e7842fee2cd0da

SHA512
93a8172ad05439d544a8271a8937be153004d0d071cfd5874249ff7835b61f60667a1d0bf2ab7fb64e85c7cd5ce78cacd0ce7d6d26fb2d157f4caa645d09eeae

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

Filesize
18KB

MD5
b0f139f2527edba6d4a0ea027c104afd

SHA1
6b890fab174a54dd8e67a065cb59d510c2b32ef1

SHA256
9812420e506b96cbde63810632b9826cee3720c562cf5e128d306a8a0900c05b

SHA512
95fb84544dbb656d40eb5508838c3928afa9aef0a3efbba04a5d9c654d06733d532e39a2627cc17b38411b66e40ccbcb083f25125e6d51dab42e8663d6f93e0c

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

Filesize
18KB

MD5
b0f139f2527edba6d4a0ea027c104afd

SHA1
6b890fab174a54dd8e67a065cb59d510c2b32ef1

SHA256
9812420e506b96cbde63810632b9826cee3720c562cf5e128d306a8a0900c05b

SHA512
95fb84544dbb656d40eb5508838c3928afa9aef0a3efbba04a5d9c654d06733d532e39a2627cc17b38411b66e40ccbcb083f25125e6d51dab42e8663d6f93e0c

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

Filesize
18KB

MD5
b0f139f2527edba6d4a0ea027c104afd

SHA1
6b890fab174a54dd8e67a065cb59d510c2b32ef1

SHA256
9812420e506b96cbde63810632b9826cee3720c562cf5e128d306a8a0900c05b

SHA512
95fb84544dbb656d40eb5508838c3928afa9aef0a3efbba04a5d9c654d06733d532e39a2627cc17b38411b66e40ccbcb083f25125e6d51dab42e8663d6f93e0c

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

Filesize
18KB

MD5
b0f139f2527edba6d4a0ea027c104afd

SHA1
6b890fab174a54dd8e67a065cb59d510c2b32ef1

SHA256
9812420e506b96cbde63810632b9826cee3720c562cf5e128d306a8a0900c05b

SHA512
95fb84544dbb656d40eb5508838c3928afa9aef0a3efbba04a5d9c654d06733d532e39a2627cc17b38411b66e40ccbcb083f25125e6d51dab42e8663d6f93e0c

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
18KB

MD5
b0f139f2527edba6d4a0ea027c104afd

SHA1
6b890fab174a54dd8e67a065cb59d510c2b32ef1

SHA256
9812420e506b96cbde63810632b9826cee3720c562cf5e128d306a8a0900c05b

SHA512
95fb84544dbb656d40eb5508838c3928afa9aef0a3efbba04a5d9c654d06733d532e39a2627cc17b38411b66e40ccbcb083f25125e6d51dab42e8663d6f93e0c

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
18KB

MD5
b0f139f2527edba6d4a0ea027c104afd

SHA1
6b890fab174a54dd8e67a065cb59d510c2b32ef1

SHA256
9812420e506b96cbde63810632b9826cee3720c562cf5e128d306a8a0900c05b

SHA512
95fb84544dbb656d40eb5508838c3928afa9aef0a3efbba04a5d9c654d06733d532e39a2627cc17b38411b66e40ccbcb083f25125e6d51dab42e8663d6f93e0c

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
18KB

MD5
b0f139f2527edba6d4a0ea027c104afd

SHA1
6b890fab174a54dd8e67a065cb59d510c2b32ef1

SHA256
9812420e506b96cbde63810632b9826cee3720c562cf5e128d306a8a0900c05b

SHA512
95fb84544dbb656d40eb5508838c3928afa9aef0a3efbba04a5d9c654d06733d532e39a2627cc17b38411b66e40ccbcb083f25125e6d51dab42e8663d6f93e0c

Download Submit
memory/1672-9-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download
memory/1672-8-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/1672-2-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download
memory/2088-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2088-23-0x00000000003A0000-0x00000000003B1000-memory.dmp

Filesize
68KB

Download
memory/2088-49-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2088-53-0x00000000003A0000-0x00000000003B1000-memory.dmp

Filesize
68KB

Download
memory/2548-24-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download