24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

Analysis

max time kernel
149s
max time network
120s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
05/11/2023, 09:19

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General

Target

NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
Size

18KB
MD5

08d7ef2cbd0b39662f48c7d24033d9b0
SHA1

5e8f7a8eaa5f29dc4f28680ded4978c221b622a8
SHA256

24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213
SHA512

decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXqeNjJ:rRkiLw3HsDSARGG/pNjJ

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\FirewallDisableNotify = "5120"	rmass.exe
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

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
2988	rmass.exe
2556	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1848	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
1848	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
2988	rmass.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1848-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000900000001201b-4.dat	upx
behavioral1/memory/1848-10-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000900000001201b-23.dat	upx
behavioral1/files/0x000900000001201b-13.dat	upx
behavioral1/files/0x000900000001201b-12.dat	upx
behavioral1/files/0x000900000001201b-22.dat	upx
behavioral1/files/0x000900000001201b-7.dat	upx
behavioral1/files/0x000900000001201b-6.dat	upx
behavioral1/memory/2556-24-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2988-25-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2556-57-0x0000000000400000-0x0000000000411000-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\FirewallDisableNotify = "5120"	rmass.exe
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

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}\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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	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\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.08d7ef2cbd0b39662f48c7d24033d9b0.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.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\winrnt.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\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
2988	rmass.exe
2988	rmass.exe
2988	rmass.exe
2556	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1848	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
Token: SeDebugPrivilege	2988	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 2988	1848	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe	28
PID 1848 wrote to memory of 2988	1848	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe	28
PID 1848 wrote to memory of 2988	1848	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe	28
PID 1848 wrote to memory of 2988	1848	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe	28
PID 2988 wrote to memory of 420	2988	rmass.exe	3
PID 2988 wrote to memory of 1204	2988	rmass.exe	10
PID 2988 wrote to memory of 2556	2988	rmass.exe	29
PID 2988 wrote to memory of 2556	2988	rmass.exe	29
PID 2988 wrote to memory of 2556	2988	rmass.exe	29
PID 2988 wrote to memory of 2556	2988	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1204
- C:\Users\Admin\AppData\Local\Temp\NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1848
- - 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:2988
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2556

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
f6e2a903544c62430ae33ce86eb71863

SHA1
3944656e73377c5ed5e71f6f2a06a67a4544a61b

SHA256
162f95298e684fe7da86a31ea69df1b25bbd5d19caa93b24ba68498790c2709f

SHA512
b74e729adf285a4ba02f99a56c4852d419392c7965331462330a164db81fe187da9eac0e791dc53cfdec6c03823c1937ea79cdddd993ad98d23f9def8a1153db

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

Filesize
21KB

MD5
18628d187491b9ba35a1cff83f0caa8e

SHA1
efe90bc39e16af90758fb76e58ca87157812843e

SHA256
da4ba764213213153d9362b2dd008561d865f89409e51dbd297400332f704f70

SHA512
2ca610bbf182656fb1cbaf8f5fd0eec9905e8852846d42ed49f915dc6096a6a5b17068e2a8a1c2f173836606025c508c9a5e9fad05822a76eb7831461e10f04f

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

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

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

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

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

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

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

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

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
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

Download Submit
memory/1848-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1848-11-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/1848-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2556-24-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2556-57-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2988-25-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download