753e9a7b2ceafc387b493a78cb67b3b7f5ae64e6fb34b37b5ccc8bfdf8b088f3

General

Target

NEAS.59237f98619918789d844c53a6b11ca0.exe
Size

21KB
MD5

59237f98619918789d844c53a6b11ca0
SHA1

c59e409cc9985c0e3ed5be5c1310bc861afcc395
SHA256

753e9a7b2ceafc387b493a78cb67b3b7f5ae64e6fb34b37b5ccc8bfdf8b088f3
SHA512

5ef9a72b6eec847da45c49f2dea38d2d9ef053a950bd64e806e27ec94d48c2f4fe80d294427e93a89e9f9fc3828ad54d7b79d604a73c686bd60b64eaefd612c3
SSDEEP

384:jIz4RzfVzXQnpFurRW+ntZHu6sJuDwSXgqD5jbF4p:jIURpzAp+RFtNvGuDwMip

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\{484E464F-5343-4446-484E-464F53434446}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\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
1860	rmass.exe
3556	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00040000000222d5-4.dat	upx
behavioral2/files/0x00040000000222d5-2.dat	upx
behavioral2/memory/1860-5-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x00040000000222d5-7.dat	upx
behavioral2/memory/1860-24-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3556-26-0x0000000000400000-0x0000000000411000-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 created	C:\Windows\SysWOW64\ahuy.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
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.59237f98619918789d844c53a6b11ca0.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	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 created	C:\Windows\SysWOW64\rmass.exe	NEAS.59237f98619918789d844c53a6b11ca0.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.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
1860	rmass.exe
1860	rmass.exe
3556	rmass.exe
1860	rmass.exe
3556	rmass.exe
1860	rmass.exe
1860	rmass.exe
1860	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1860	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4068 wrote to memory of 1860	4068	NEAS.59237f98619918789d844c53a6b11ca0.exe	86
PID 4068 wrote to memory of 1860	4068	NEAS.59237f98619918789d844c53a6b11ca0.exe	86
PID 4068 wrote to memory of 1860	4068	NEAS.59237f98619918789d844c53a6b11ca0.exe	86
PID 1860 wrote to memory of 3556	1860	rmass.exe	87
PID 1860 wrote to memory of 3556	1860	rmass.exe	87
PID 1860 wrote to memory of 3556	1860	rmass.exe	87
PID 1860 wrote to memory of 624	1860	rmass.exe	3
PID 1860 wrote to memory of 3368	1860	rmass.exe	36

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:624

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3368
- C:\Users\Admin\AppData\Local\Temp\NEAS.59237f98619918789d844c53a6b11ca0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.59237f98619918789d844c53a6b11ca0.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:4068
- - 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
    - 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:1860
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3556

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

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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
0baa4ba031f442f2786509d207c9318c

SHA1
0c7d7fd0d6b5eff6bffed0ca2c7599c4a3c9f73f

SHA256
a2e3f968158dba15773939cee4f30547783820c02f3ada24b5585ad8ccc649fa

SHA512
ca6306162646067378832ae057bf3913586595d1bcf424c0c07cd47e53585db0214a7bb720513988233ebbd7147d5ef233f07b19fe795fdd73f2481302eee332

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

Filesize
22KB

MD5
719e90c0b10260f8a0b47f32f7b8688a

SHA1
6b89073251ec630d6442e990d09624bf2f2ff247

SHA256
5a7e7abaefd54347ff90fe34784596d2322a756f9091db2367cd3b566861417f

SHA512
5b8579383fcc2eb9c271dc9847adf4ea164f86e642f1380458c179a364f5afb8831f75ba6b205b38dc3816befbe9ad1516cd26d12624282ebd775151753092df

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

Filesize
19KB

MD5
43cb08584a5e25857936e82a335a0760

SHA1
b55b697067f3222a93bcec664244487a727210fa

SHA256
4d9e15c570a32b2a564afead0bf580d526a646b4bfe6e6ee58450740a4ddb7c3

SHA512
e11600f2827ba59e8b4829743b9dd9a9b29e53df19ac85792c178390c21fa7650dd3284e6c165880cb5c2c96f5485a90878da2f51b7f4254ebe7e81194574fd2

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

Filesize
19KB

MD5
43cb08584a5e25857936e82a335a0760

SHA1
b55b697067f3222a93bcec664244487a727210fa

SHA256
4d9e15c570a32b2a564afead0bf580d526a646b4bfe6e6ee58450740a4ddb7c3

SHA512
e11600f2827ba59e8b4829743b9dd9a9b29e53df19ac85792c178390c21fa7650dd3284e6c165880cb5c2c96f5485a90878da2f51b7f4254ebe7e81194574fd2

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

Filesize
19KB

MD5
43cb08584a5e25857936e82a335a0760

SHA1
b55b697067f3222a93bcec664244487a727210fa

SHA256
4d9e15c570a32b2a564afead0bf580d526a646b4bfe6e6ee58450740a4ddb7c3

SHA512
e11600f2827ba59e8b4829743b9dd9a9b29e53df19ac85792c178390c21fa7650dd3284e6c165880cb5c2c96f5485a90878da2f51b7f4254ebe7e81194574fd2

Download Submit
C:\Windows\System32\drivers\etc\hosts

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1860-5-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1860-24-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3556-26-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4068-3-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads