252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

Analysis

max time kernel
150s
max time network
143s
platform
windows7_x64
resource
win7-20231025-en
resource tags

arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
submitted
04/11/2023, 08:07

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General

Target

NEAS.7d652a1374b838d985eabef0e78199b0.exe
Size

19KB
MD5

7d652a1374b838d985eabef0e78199b0
SHA1

19c61eaf6d9cb56aea25bc989287a4f8d43b8599
SHA256

252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc
SHA512

c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXK0:rRkiLw3HsDSARGG/60

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\IsInstalled = "1"	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\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
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	rmass.exe

Executes dropped EXE 2 IoCs

pid	Process
2112	rmass.exe
2860	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2032	NEAS.7d652a1374b838d985eabef0e78199b0.exe
2032	NEAS.7d652a1374b838d985eabef0e78199b0.exe
2112	rmass.exe

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2032-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0009000000012023-4.dat	upx
behavioral1/files/0x0009000000012023-7.dat	upx
behavioral1/files/0x0009000000012023-13.dat	upx
behavioral1/memory/2112-22-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0009000000012023-12.dat	upx
behavioral1/memory/2032-10-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0009000000012023-23.dat	upx
behavioral1/files/0x0009000000012023-24.dat	upx
behavioral1/files/0x0009000000012023-6.dat	upx
behavioral1/memory/2112-25-0x00000000003B0000-0x00000000003C1000-memory.dmp	upx
behavioral1/memory/2860-26-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2112-52-0x0000000000400000-0x0000000000411000-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\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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "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\rmass.exe	NEAS.7d652a1374b838d985eabef0e78199b0.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.7d652a1374b838d985eabef0e78199b0.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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.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
2112	rmass.exe
2112	rmass.exe
2112	rmass.exe
2860	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	NEAS.7d652a1374b838d985eabef0e78199b0.exe
Token: SeDebugPrivilege	2112	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 2112	2032	NEAS.7d652a1374b838d985eabef0e78199b0.exe	28
PID 2032 wrote to memory of 2112	2032	NEAS.7d652a1374b838d985eabef0e78199b0.exe	28
PID 2032 wrote to memory of 2112	2032	NEAS.7d652a1374b838d985eabef0e78199b0.exe	28
PID 2032 wrote to memory of 2112	2032	NEAS.7d652a1374b838d985eabef0e78199b0.exe	28
PID 2112 wrote to memory of 424	2112	rmass.exe	1
PID 2112 wrote to memory of 1252	2112	rmass.exe	12
PID 2112 wrote to memory of 2860	2112	rmass.exe	29
PID 2112 wrote to memory of 2860	2112	rmass.exe	29
PID 2112 wrote to memory of 2860	2112	rmass.exe	29
PID 2112 wrote to memory of 2860	2112	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:424

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1252
- C:\Users\Admin\AppData\Local\Temp\NEAS.7d652a1374b838d985eabef0e78199b0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.7d652a1374b838d985eabef0e78199b0.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2032
- - 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:2112
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2860

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
e242a8595ee535787a5e92565d19f6a8

SHA1
0721930a96846c119a9a3453fc97975a5d99294d

SHA256
081e2fe179c0c6d741a7b902a13a0d0152e1da3482aa4c7c90beec0a69c85df8

SHA512
0e789777ed999a740d88ca5878624aa33ce127313f27218a0eb154c0cd776b7824a649eb727f1bdafb8ff731572bfddc7fae8afba525c67b915cf9b70bad2c98

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

Filesize
22KB

MD5
170cb533de6207cae553f8616da11b64

SHA1
eb20f931030d3bc4fb928231b0df149c32129db1

SHA256
6adaf4832efb8cde838c5d7bfeada7f4b4be334c3da69824aebb2537ca27b0dc

SHA512
6ea0cb34c8da006c8f6646974d7ec451b07c580c9aeaf4aac83d82632b2efa65399e3950f8588450d2e5da8c71225671ce2e2b782b767fa02fe9affd9d930a8d

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

Filesize
19KB

MD5
7d652a1374b838d985eabef0e78199b0

SHA1
19c61eaf6d9cb56aea25bc989287a4f8d43b8599

SHA256
252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

SHA512
c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3

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

Filesize
19KB

MD5
7d652a1374b838d985eabef0e78199b0

SHA1
19c61eaf6d9cb56aea25bc989287a4f8d43b8599

SHA256
252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

SHA512
c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3

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

Filesize
19KB

MD5
7d652a1374b838d985eabef0e78199b0

SHA1
19c61eaf6d9cb56aea25bc989287a4f8d43b8599

SHA256
252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

SHA512
c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3

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

Filesize
19KB

MD5
7d652a1374b838d985eabef0e78199b0

SHA1
19c61eaf6d9cb56aea25bc989287a4f8d43b8599

SHA256
252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

SHA512
c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3

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
7d652a1374b838d985eabef0e78199b0

SHA1
19c61eaf6d9cb56aea25bc989287a4f8d43b8599

SHA256
252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

SHA512
c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
7d652a1374b838d985eabef0e78199b0

SHA1
19c61eaf6d9cb56aea25bc989287a4f8d43b8599

SHA256
252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

SHA512
c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
7d652a1374b838d985eabef0e78199b0

SHA1
19c61eaf6d9cb56aea25bc989287a4f8d43b8599

SHA256
252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

SHA512
c30cee59a39185c1f88dab26fbed8f9cd8f9a73b5c27aef0cb03561747213ace07e6a319204366d400caee5108b2366e4d4b4789f4ea1339222e0b0a8db34ed3

Download Submit
memory/2032-11-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/2032-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2032-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2112-22-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2112-52-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2112-55-0x00000000003B0000-0x00000000003C1000-memory.dmp

Filesize
68KB

Download
memory/2112-25-0x00000000003B0000-0x00000000003C1000-memory.dmp

Filesize
68KB

Download
memory/2860-26-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download