252cfd35b7303b91369dd00c1a0d5ab8b4cf208018e40d14656e3069c8e464bc

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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\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
1972	rmass.exe
1536	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0006000000022cdf-6.dat	upx
behavioral2/files/0x0006000000022cdf-5.dat	upx
behavioral2/files/0x0006000000022cdf-8.dat	upx
behavioral2/memory/3944-9-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1972-41-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1536-45-0x0000000000400000-0x0000000000411000-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}\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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.7d652a1374b838d985eabef0e78199b0.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.7d652a1374b838d985eabef0e78199b0.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	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 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 opened for modification	C:\Windows\SysWOW64\aset32.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 8 IoCs

pid	Process
1536	rmass.exe
1536	rmass.exe
1972	rmass.exe
1972	rmass.exe
1972	rmass.exe
1972	rmass.exe
1972	rmass.exe
1972	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3944	NEAS.7d652a1374b838d985eabef0e78199b0.exe
Token: SeDebugPrivilege	1972	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3944 wrote to memory of 1972	3944	NEAS.7d652a1374b838d985eabef0e78199b0.exe	93
PID 3944 wrote to memory of 1972	3944	NEAS.7d652a1374b838d985eabef0e78199b0.exe	93
PID 3944 wrote to memory of 1972	3944	NEAS.7d652a1374b838d985eabef0e78199b0.exe	93
PID 1972 wrote to memory of 1536	1972	rmass.exe	92
PID 1972 wrote to memory of 1536	1972	rmass.exe	92
PID 1972 wrote to memory of 1536	1972	rmass.exe	92
PID 1972 wrote to memory of 628	1972	rmass.exe	3
PID 1972 wrote to memory of 3260	1972	rmass.exe	47

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:628

C:\Users\Admin\AppData\Local\Temp\NEAS.7d652a1374b838d985eabef0e78199b0.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.7d652a1374b838d985eabef0e78199b0.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3944
- C:\Windows\SysWOW64\rmass.exe
  "C:\Windows\system32\rmass.exe"
  2⤵
  - Windows security bypass
  - Drops file in Drivers directory
  - Modifies Installed Components in the registry
  - Sets file execution options in registry
  - Executes dropped EXE
  - 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:1972

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3260

C:\Windows\SysWOW64\rmass.exe
--k33p
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

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
2ad0037a7bfb7eddb85a23d2cd41f244

SHA1
7b457bd12edae90d4b03acdf1a1f3c7a2ef6fcd0

SHA256
c75422a32a9dcd67f5596a75c2cb085892d21e59c0574c787076d0bf5293c8d4

SHA512
24e0276a1a927cbcead955186d4b8f88c073be30a57cb4a48be31a9f4a5b5a3852970139846b571ca1307a68cd2c63464a11c307b4726138416bf47afa9f37f7

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

Filesize
22KB

MD5
6852a0f6a58035d0a1637d1c6bfcb837

SHA1
92344a5a990ac7fb64d1299adab337527ee3e8bf

SHA256
eb74f66e68a20c52eac3a694d509ea9487854b36dfbefaec98f0b677fa7aea83

SHA512
45765fdc4be0acc1420da131a3c7d53f8dbba93f887c1cad29be27a9847398a6d2b29271f6ce2e0cee986e33f5bf3d06082265a68d0bfc56743c29b8d701d32b

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
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1536-45-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1972-41-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3944-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3944-9-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads