a84935faf08a1c8cf5578f8e22ceab14104d54d24518edff869305210740ef61

General

Target

49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
Size

23KB
MD5

49327ef8ca4bfcef904c0059f9798110
SHA1

304fde14e82526f507d41d0170e25f2459210a32
SHA256

a84935faf08a1c8cf5578f8e22ceab14104d54d24518edff869305210740ef61
SHA512

c3dbc089d18fa4123aa8626505c24e4241dd2fb6b9b84465e6493d59fded26bd09482a173e9701a99db12cb4afb52f415af4657589b629717eba505f72cf62b8
SSDEEP

384:jIz4Apz1qbyU6IBsdZzpfucfoGXxDCsfwa2qPXknPmddwVL3zYskns:jIUmz0bJ6AszzpmqxdfR2YU+ddwVLDMs

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\{50594457-4747-5545-5059-445747475545}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50594457-4747-5545-5059-445747475545}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50594457-4747-5545-5059-445747475545}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50594457-4747-5545-5059-445747475545}\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
732	rmass.exe
3240	rmass.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b58-2.dat	upx
behavioral2/memory/732-5-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3240-15-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/732-49-0x0000000000400000-0x0000000000411000-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
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\rmass.exe	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
File created	C:\Windows\SysWOW64\rmass.exe	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ahuy.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\rmass.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	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

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
732	rmass.exe
732	rmass.exe
732	rmass.exe
732	rmass.exe
732	rmass.exe
732	rmass.exe
3240	rmass.exe
3240	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	732	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2308 wrote to memory of 732	2308	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe	83
PID 2308 wrote to memory of 732	2308	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe	83
PID 2308 wrote to memory of 732	2308	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe	83
PID 732 wrote to memory of 608	732	rmass.exe	5
PID 732 wrote to memory of 3240	732	rmass.exe	84
PID 732 wrote to memory of 3240	732	rmass.exe	84
PID 732 wrote to memory of 3240	732	rmass.exe	84
PID 732 wrote to memory of 3440	732	rmass.exe	56

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:608

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3440
- C:\Users\Admin\AppData\Local\Temp\49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\49327ef8ca4bfcef904c0059f9798110_NEIKI.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2308
- - 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:732
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3240

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
23KB

MD5
3fbd7422382a7b3231770abf6c40fc31

SHA1
6bfcdddbac006a300c446e52bef05cd8a10bb7e8

SHA256
09a772c2af77c5fbef492d8516bd401ccb954e7aaae19c3d2bc6bf9f3683ef07

SHA512
96025202e8da8931f7e0506191c4eeb2b530d7272e615ba492583c6f7aeed052b7d3899996bbcc3b24ff7760e5263f97b85891925435a6abb02c2aa56bad4d2a

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

Filesize
24KB

MD5
6fbc1ab691b40d9facd62d1ff01232a3

SHA1
7e15d97dd8bc0426906cd07fab460fe77280a2bc

SHA256
72167379cdc016f03558dbf08c31c866a1c9ee8ed390c6013636db2a433170ac

SHA512
58970fd1684de787b2885dc92e9ec7e3add2f751aa9948ab73bed2c89c077042a47e9cac8c0eed258dccee91ebec1e5df613398e5e72f3160fce42db8d210d1c

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

Filesize
21KB

MD5
10b6d91df837ae2772d4dec867f9a6b6

SHA1
1315debb80870b36cb995549b102474fd685ced0

SHA256
632e3bf404c9bf6657decff42253b02416715f5ed9ccf5864a5bb031b90eb789

SHA512
72fccc0e6d9e921cb29aebc67e09c983476c5ac2dd13c28e8707d48ee5b01ba19eb6f984c0eec16bdd48a00bba4fef0349cb41a8fe953784e6325aafa4eda23d

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/732-5-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/732-49-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2308-3-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/3240-15-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads