ce7296b33e2de1a6a0a76a14f0c1ad16c3b811764197f4677e1b2f8d169b5374

General

Target

c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Size

80KB
MD5

c4d259833cc9e192e355c281ed6b9720
SHA1

3a397aff1b3742097046e516ba43f17843036850
SHA256

ce7296b33e2de1a6a0a76a14f0c1ad16c3b811764197f4677e1b2f8d169b5374
SHA512

3104276a6fc74fa5627dfa06bab9cbea37a3c763add187cea5c82d9a3c4250158185e4d5ec1bdf98c6716b4a22a8162a5467cfe12b171677f399b5046fee7a54
SSDEEP

1536:5vvMoORizUPliPsm/gL16ZpQGh6MgHN+PhuLGR/11:RvxOMUMPsgQvTMY+PhGGR/11

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 4 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\Shell = "Explorer.exe \"C:\\Windows\\o4267427.exe\""	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\j6267422.exe"	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\o4267427.exe\""	smss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\j6267422.exe"	smss.exe

Modifies visibility of file extensions in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	smss.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	smss.exe

Adds policy Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\N4218c = "\"C:\\Windows\\_default26742.pif\""	smss.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\f1464Adm = "\"C:\\Users\\Admin\\AppData\\Local\\dv692700x\\yesbron.com\""	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\N4218c = "\"C:\\Windows\\_default26742.pif\""	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\f1464Adm = "\"C:\\Users\\Admin\\AppData\\Local\\dv692700x\\yesbron.com\""	smss.exe

Disables RegEdit via registry modification 2 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	smss.exe

Executes dropped EXE 1 IoCs

pid	Process
2644	smss.exe

Loads dropped DLL 3 IoCs

pid	Process
1508	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
1508	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
2644	smss.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\N4218c = "\"C:\\Windows\\j6267422.exe\""	smss.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\f1464Adm = "\"C:\\Windows\\system32\\s4827\\zh59927084y.exe\""	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\N4218c = "\"C:\\Windows\\j6267422.exe\""	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\f1464Adm = "\"C:\\Windows\\system32\\s4827\\zh59927084y.exe\""	smss.exe

Drops file in System32 directory 17 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\msvbvm60.dll	smss.exe
File opened for modification	C:\Windows\SysWOW64\s4827\smss.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\s4827\zh59927084y.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\c_26742k.com	smss.exe
File created	C:\Windows\SysWOW64\s4827\zh59927084y.exemsatr.bin	smss.exe
File created	C:\Windows\SysWOW64\s4827\winlogon.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\s4827	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\msvbvm60.dll	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File created	C:\Windows\SysWOW64\c_26742k.com	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File created	C:\Windows\SysWOW64\s4827\zh59927084y.exe	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\s4827	smss.exe
File created	C:\Windows\SysWOW64\s4827\smss.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\s4827\smss.exe	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\c_26742k.com	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\s4827\zh59927084y.exemsatr.bin	smss.exe
File created	C:\Windows\SysWOW64\s4827\smss.exe	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\s4827\zh59927084y.exe	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe

Drops file in Windows directory 9 IoCs

description	ioc	Process
File created	C:\Windows\j6267422.exe	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File created	C:\Windows\o4267427.exe	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\_default26742.pif	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File created	C:\Windows\_default26742.pif	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\o4267427.exe	smss.exe
File opened for modification	C:\Windows\_default26742.pif	smss.exe
File opened for modification	C:\Windows\j6267422.exe	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\o4267427.exe	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
File opened for modification	C:\Windows\j6267422.exe	smss.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1508 wrote to memory of 2644	1508	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe	29
PID 1508 wrote to memory of 2644	1508	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe	29
PID 1508 wrote to memory of 2644	1508	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe	29
PID 1508 wrote to memory of 2644	1508	c4d259833cc9e192e355c281ed6b9720_NEIKI.exe	29

C:\Users\Admin\AppData\Local\Temp\c4d259833cc9e192e355c281ed6b9720_NEIKI.exe
"C:\Users\Admin\AppData\Local\Temp\c4d259833cc9e192e355c281ed6b9720_NEIKI.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Adds policy Run key to start application
- Disables RegEdit via registry modification
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1508
- C:\Windows\SysWOW64\s4827\smss.exe
  "C:\Windows\system32\s4827\smss.exe" ~Brontok~Log~
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visibility of file extensions in Explorer
  - Modifies visiblity of hidden/system files in Explorer
  - Adds policy Run key to start application
  - Disables RegEdit via registry modification
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in System32 directory
  - Drops file in Windows directory
  PID:2644

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

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\c_26742k.com

Filesize
80KB

MD5
c4d259833cc9e192e355c281ed6b9720

SHA1
3a397aff1b3742097046e516ba43f17843036850

SHA256
ce7296b33e2de1a6a0a76a14f0c1ad16c3b811764197f4677e1b2f8d169b5374

SHA512
3104276a6fc74fa5627dfa06bab9cbea37a3c763add187cea5c82d9a3c4250158185e4d5ec1bdf98c6716b4a22a8162a5467cfe12b171677f399b5046fee7a54

Download Submit
memory/1508-0-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2644-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads