4672e5a178fc023be578c92ff551ff106837336c596824d3c46f2f48d6e6f798

General

Target

f537775e473e7ef09eaffb24889df490_NEIKI.exe
Size

21KB
MD5

f537775e473e7ef09eaffb24889df490
SHA1

b41031414c7ba6dc3b0f57ee7b84cc9942d06edb
SHA256

4672e5a178fc023be578c92ff551ff106837336c596824d3c46f2f48d6e6f798
SHA512

49a73992cd501c05b303bf9ff5ade07745c666703f961816ae9238b30e7ed4b51ad1be8d46f932fd9a351be170ce6dcd4a43e5355a29b3824dcae7a777186a70
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6khL:rRkiLw3HsDSARGG/MMb7rO

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\{53434647-4252-4254-5343-464742524254}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{53434647-4252-4254-5343-464742524254}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{53434647-4252-4254-5343-464742524254}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{53434647-4252-4254-5343-464742524254}\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
2000	rmass.exe
2400	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2004	f537775e473e7ef09eaffb24889df490_NEIKI.exe
2004	f537775e473e7ef09eaffb24889df490_NEIKI.exe
2000	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2004-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000b000000015d31-7.dat	upx
behavioral1/memory/2000-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2400-25-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2000-24-0x0000000000360000-0x0000000000371000-memory.dmp	upx
behavioral1/memory/2000-60-0x0000000000400000-0x0000000000411000-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\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

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\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\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	f537775e473e7ef09eaffb24889df490_NEIKI.exe
File opened for modification	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 opened for modification	C:\Windows\SysWOW64\rmass.exe	f537775e473e7ef09eaffb24889df490_NEIKI.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
2000	rmass.exe
2000	rmass.exe
2000	rmass.exe
2400	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2004	f537775e473e7ef09eaffb24889df490_NEIKI.exe
Token: SeDebugPrivilege	2000	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 2000	2004	f537775e473e7ef09eaffb24889df490_NEIKI.exe	28
PID 2004 wrote to memory of 2000	2004	f537775e473e7ef09eaffb24889df490_NEIKI.exe	28
PID 2004 wrote to memory of 2000	2004	f537775e473e7ef09eaffb24889df490_NEIKI.exe	28
PID 2004 wrote to memory of 2000	2004	f537775e473e7ef09eaffb24889df490_NEIKI.exe	28
PID 2000 wrote to memory of 436	2000	rmass.exe	5
PID 2000 wrote to memory of 2400	2000	rmass.exe	29
PID 2000 wrote to memory of 2400	2000	rmass.exe	29
PID 2000 wrote to memory of 2400	2000	rmass.exe	29
PID 2000 wrote to memory of 2400	2000	rmass.exe	29
PID 2000 wrote to memory of 1404	2000	rmass.exe	21

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:436

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1404
- C:\Users\Admin\AppData\Local\Temp\f537775e473e7ef09eaffb24889df490_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\f537775e473e7ef09eaffb24889df490_NEIKI.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2004
- - 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:2000
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2400

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
3700e20a6ab17f525b10b6a97ad73f83

SHA1
ee897290471aad198fe2068df936a4319156b1ff

SHA256
4a67f6c2092710a9de1c0a50ccfc59f4fba734bbcc9c3c7703453b859069d609

SHA512
c306a821c93c67075761394b9ce7d5a9e64a1bc38f1b3299f38f11e21e95ebeb42e98de0a0630d1d07ef0da59502ac6fef2adda1309b439e337c6823de9f4216

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

Filesize
25KB

MD5
1238884c172a47d062af3fc7a8933bd0

SHA1
2d7b73c85c90a357f4e3504d83c820f6a13fd195

SHA256
5a9ce304129d275700360f29374cb1fc4ede8f66124bea2d1a418307eff35759

SHA512
93315faac39a4914a736ea806cd9c28a112fe095800ba56e53ba0888662888f9b7c875db0ebfa49c336077f7b0ae213f582dd2a4d2c5d040c33ab1ec8c014c3d

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

Filesize
21KB

MD5
f537775e473e7ef09eaffb24889df490

SHA1
b41031414c7ba6dc3b0f57ee7b84cc9942d06edb

SHA256
4672e5a178fc023be578c92ff551ff106837336c596824d3c46f2f48d6e6f798

SHA512
49a73992cd501c05b303bf9ff5ade07745c666703f961816ae9238b30e7ed4b51ad1be8d46f932fd9a351be170ce6dcd4a43e5355a29b3824dcae7a777186a70

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

Filesize
1KB

MD5
b10b13206b0f2cf3968050072f6979bf

SHA1
699db21ba9cecf3f13ac3d76e22cfa41aa94da80

SHA256
0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

SHA512
d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

Download Submit
memory/2000-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2000-24-0x0000000000360000-0x0000000000371000-memory.dmp

Filesize
68KB

Download
memory/2000-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2000-100-0x0000000000360000-0x0000000000371000-memory.dmp

Filesize
68KB

Download
memory/2004-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2004-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2400-25-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads