a945ee255ac7bc5751c05c4913b69c1f0397f176fe502c223f27b9d1ba2a5c37

General

Target

dcec5319d1ed548b7523cda83292aad0_NEIKI.exe
Size

22KB
MD5

dcec5319d1ed548b7523cda83292aad0
SHA1

d352a94f3510a1bee94d0657ae951cf498bee616
SHA256

a945ee255ac7bc5751c05c4913b69c1f0397f176fe502c223f27b9d1ba2a5c37
SHA512

28019f287be93831b71c7b58c0fa1f546a91a5aa7eed2b570eca49ed82b8a985b7cd59f029ea64cb08e7f777742585b9cf229fbffcd455e4ca88810b1c42f62a
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6Mr0:rRkiLw3HsDSARGG/MMb7rH

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\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

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 (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	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
2596	rmass.exe
2536	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2244	dcec5319d1ed548b7523cda83292aad0_NEIKI.exe
2244	dcec5319d1ed548b7523cda83292aad0_NEIKI.exe
2596	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2244-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000c00000001445e-4.dat	upx
behavioral1/memory/2244-5-0x0000000000320000-0x0000000000331000-memory.dmp	upx
behavioral1/memory/2244-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2596-18-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2596-60-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2536-61-0x0000000000400000-0x0000000000411000-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 created	C:\Windows\SysWOW64\rmass.exe	dcec5319d1ed548b7523cda83292aad0_NEIKI.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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	dcec5319d1ed548b7523cda83292aad0_NEIKI.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\ahuy.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\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
2596	rmass.exe
2596	rmass.exe
2596	rmass.exe
2536	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	dcec5319d1ed548b7523cda83292aad0_NEIKI.exe
Token: SeDebugPrivilege	2596	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2596	2244	dcec5319d1ed548b7523cda83292aad0_NEIKI.exe	28
PID 2244 wrote to memory of 2596	2244	dcec5319d1ed548b7523cda83292aad0_NEIKI.exe	28
PID 2244 wrote to memory of 2596	2244	dcec5319d1ed548b7523cda83292aad0_NEIKI.exe	28
PID 2244 wrote to memory of 2596	2244	dcec5319d1ed548b7523cda83292aad0_NEIKI.exe	28
PID 2596 wrote to memory of 2536	2596	rmass.exe	29
PID 2596 wrote to memory of 2536	2596	rmass.exe	29
PID 2596 wrote to memory of 2536	2596	rmass.exe	29
PID 2596 wrote to memory of 2536	2596	rmass.exe	29
PID 2596 wrote to memory of 428	2596	rmass.exe	5
PID 2596 wrote to memory of 1192	2596	rmass.exe	21

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:428

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1192
- C:\Users\Admin\AppData\Local\Temp\dcec5319d1ed548b7523cda83292aad0_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\dcec5319d1ed548b7523cda83292aad0_NEIKI.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2244
- - 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:2596
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2536

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
24KB

MD5
f74e63afa96baa9a09bcf23913280ca2

SHA1
4bf7f4456af85b5a4a36cd56f8d4313c96967d4b

SHA256
460359caaeb6c7ce4b0bc87405d6c2b4b8f2e2a2d859add415186eba7b25dbba

SHA512
9ff6ea0578d770ce0412fa4fafa285f7882fd200a710353165491011e6cdcd1c863d90385094dd834821224f699ab2c5076a6df69af04ab7cfdad954d83fb2c5

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

Filesize
25KB

MD5
8e75ada8feea226e7cf90aa8155eb40d

SHA1
47e91370b794b36f47474d3a14cbcb3403c080a7

SHA256
85e7b9dca8b3fdf32bbc93020a2fd4bf25532f565b01c99603a7308282ed79b7

SHA512
a4e84c9c99b323bc433c7f0b0ec69feff8e9dfd28af29fe2d78b213c272d3679dd1835de35f81ab7981018d69a9733cc31f0212c719380da7a25dc817b2ac57c

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
22KB

MD5
dcec5319d1ed548b7523cda83292aad0

SHA1
d352a94f3510a1bee94d0657ae951cf498bee616

SHA256
a945ee255ac7bc5751c05c4913b69c1f0397f176fe502c223f27b9d1ba2a5c37

SHA512
28019f287be93831b71c7b58c0fa1f546a91a5aa7eed2b570eca49ed82b8a985b7cd59f029ea64cb08e7f777742585b9cf229fbffcd455e4ca88810b1c42f62a

Download Submit
memory/2244-12-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2244-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2244-5-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/2536-61-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2596-18-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2596-19-0x00000000002F0000-0x0000000000301000-memory.dmp

Filesize
68KB

Download
memory/2596-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2596-100-0x00000000002F0000-0x0000000000301000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads