9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35

Analysis

max time kernel
150s
max time network
127s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
17/11/2023, 17:44

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General

Target

NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe
Size

19KB
MD5

21bea3cbf86d29540f5ad0e2cbe644f3
SHA1

6eb18ceee7b8420dd4a0151ced950a740dbbb325
SHA256

9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35
SHA512

6bb51c9cc0d0ff621f18f7e6800935b315f1eeda84c987bb279f6377b6879b5f0e2f8775b0719549093e06cd4a98551599aecf00ac741c12fd0f8db21159ce7b
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXaB7fp:rRkiLw3HsDSARGG/2bp

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\{41484C42-5259-4a4f-4148-4C4252594a4f}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\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
1420	rmass.exe
2200	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1964	NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe
1964	NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe
1420	rmass.exe

UPX packed file 14 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1964-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2200-25-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x00080000000120ca-24.dat	upx
behavioral1/files/0x00080000000120ca-23.dat	upx
behavioral1/memory/1420-22-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x00080000000120ca-13.dat	upx
behavioral1/files/0x00080000000120ca-12.dat	upx
behavioral1/memory/1964-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x00080000000120ca-8.dat	upx
behavioral1/memory/1964-7-0x00000000002C0000-0x00000000002D1000-memory.dmp	upx
behavioral1/files/0x00080000000120ca-6.dat	upx
behavioral1/files/0x00080000000120ca-4.dat	upx
behavioral1/memory/1420-60-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2200-61-0x0000000000400000-0x0000000000411000-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 opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.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\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.21bea3cbf86d29540f5ad0e2cbe644f3.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
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\winrnt.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
1420	rmass.exe
1420	rmass.exe
1420	rmass.exe
2200	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1964	NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe
Token: SeDebugPrivilege	1420	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 1420	1964	NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe	28
PID 1964 wrote to memory of 1420	1964	NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe	28
PID 1964 wrote to memory of 1420	1964	NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe	28
PID 1964 wrote to memory of 1420	1964	NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe	28
PID 1420 wrote to memory of 424	1420	rmass.exe	22
PID 1420 wrote to memory of 1212	1420	rmass.exe	8
PID 1420 wrote to memory of 2200	1420	rmass.exe	29
PID 1420 wrote to memory of 2200	1420	rmass.exe	29
PID 1420 wrote to memory of 2200	1420	rmass.exe	29
PID 1420 wrote to memory of 2200	1420	rmass.exe	29

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1212
- C:\Users\Admin\AppData\Local\Temp\NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.21bea3cbf86d29540f5ad0e2cbe644f3.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1964
- - 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:1420
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2200

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

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
b927e0d7ddf33d700b30a0df417ff3cf

SHA1
9429cc716268dc19ec6d1fc21484e6352934e2c7

SHA256
ee5b9ee5cdb466d307a4e3865f6eb8de976b36d8a4042fc04180d866471b4e33

SHA512
37096a5cd9de199bab6d66e37afcb6b4c88eee93519a19b727315f7417bef8e734665929f2651d7e126d5edda8fe2413ccd53e089286537a76d9440654637926

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

Filesize
22KB

MD5
ed9a855a0b2e24d317137d5b2cc14cb2

SHA1
9f828d5111a593fd9e854add2feecaf7001249dc

SHA256
60953234ca387dcd8cacca8c29fb516514dfd7ea4343e464ddcaecd62c803491

SHA512
d32904630bc190f6da97c3bcfd815b261273ad83a30ccb086edeaf59f926215997fef7c4b3ccb0904487c1c151bff5e5488b211e882db76b7070b82f664cac72

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

Filesize
19KB

MD5
21bea3cbf86d29540f5ad0e2cbe644f3

SHA1
6eb18ceee7b8420dd4a0151ced950a740dbbb325

SHA256
9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35

SHA512
6bb51c9cc0d0ff621f18f7e6800935b315f1eeda84c987bb279f6377b6879b5f0e2f8775b0719549093e06cd4a98551599aecf00ac741c12fd0f8db21159ce7b

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

Filesize
19KB

MD5
21bea3cbf86d29540f5ad0e2cbe644f3

SHA1
6eb18ceee7b8420dd4a0151ced950a740dbbb325

SHA256
9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35

SHA512
6bb51c9cc0d0ff621f18f7e6800935b315f1eeda84c987bb279f6377b6879b5f0e2f8775b0719549093e06cd4a98551599aecf00ac741c12fd0f8db21159ce7b

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

Filesize
19KB

MD5
21bea3cbf86d29540f5ad0e2cbe644f3

SHA1
6eb18ceee7b8420dd4a0151ced950a740dbbb325

SHA256
9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35

SHA512
6bb51c9cc0d0ff621f18f7e6800935b315f1eeda84c987bb279f6377b6879b5f0e2f8775b0719549093e06cd4a98551599aecf00ac741c12fd0f8db21159ce7b

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

Filesize
19KB

MD5
21bea3cbf86d29540f5ad0e2cbe644f3

SHA1
6eb18ceee7b8420dd4a0151ced950a740dbbb325

SHA256
9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35

SHA512
6bb51c9cc0d0ff621f18f7e6800935b315f1eeda84c987bb279f6377b6879b5f0e2f8775b0719549093e06cd4a98551599aecf00ac741c12fd0f8db21159ce7b

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
21bea3cbf86d29540f5ad0e2cbe644f3

SHA1
6eb18ceee7b8420dd4a0151ced950a740dbbb325

SHA256
9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35

SHA512
6bb51c9cc0d0ff621f18f7e6800935b315f1eeda84c987bb279f6377b6879b5f0e2f8775b0719549093e06cd4a98551599aecf00ac741c12fd0f8db21159ce7b

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
21bea3cbf86d29540f5ad0e2cbe644f3

SHA1
6eb18ceee7b8420dd4a0151ced950a740dbbb325

SHA256
9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35

SHA512
6bb51c9cc0d0ff621f18f7e6800935b315f1eeda84c987bb279f6377b6879b5f0e2f8775b0719549093e06cd4a98551599aecf00ac741c12fd0f8db21159ce7b

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
21bea3cbf86d29540f5ad0e2cbe644f3

SHA1
6eb18ceee7b8420dd4a0151ced950a740dbbb325

SHA256
9b8b745b7de3cd754e9d7a86217429c21d1f178c736bdffab29b0b7a989b3e35

SHA512
6bb51c9cc0d0ff621f18f7e6800935b315f1eeda84c987bb279f6377b6879b5f0e2f8775b0719549093e06cd4a98551599aecf00ac741c12fd0f8db21159ce7b

Download Submit
memory/1420-22-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1420-26-0x00000000003E0000-0x00000000003F1000-memory.dmp

Filesize
68KB

Download
memory/1420-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1964-7-0x00000000002C0000-0x00000000002D1000-memory.dmp

Filesize
68KB

Download
memory/1964-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1964-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2200-61-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2200-25-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download