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\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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "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\{51475451-5a54-5245-5147-54515A545245}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{51475451-5a54-5245-5147-54515A545245}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{51475451-5a54-5245-5147-54515A545245}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{51475451-5a54-5245-5147-54515A545245}\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
2964	rmass.exe
1296	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2940	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
2940	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
2964	rmass.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000d000000012324-1.dat	upx
behavioral1/memory/2940-2-0x0000000000020000-0x0000000000031000-memory.dmp	upx
behavioral1/memory/1296-21-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1296-56-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2964-55-0x0000000000400000-0x0000000000411000-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\{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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\Startup = "Startup"	rmass.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
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	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
File created	C:\Windows\SysWOW64\rmass.exe	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	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\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

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
2964	rmass.exe
2964	rmass.exe
2964	rmass.exe
1296	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2964	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 2964	2940	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe	28
PID 2940 wrote to memory of 2964	2940	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe	28
PID 2940 wrote to memory of 2964	2940	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe	28
PID 2940 wrote to memory of 2964	2940	49327ef8ca4bfcef904c0059f9798110_NEIKI.exe	28
PID 2964 wrote to memory of 436	2964	rmass.exe	5
PID 2964 wrote to memory of 1216	2964	rmass.exe	21
PID 2964 wrote to memory of 1296	2964	rmass.exe	29
PID 2964 wrote to memory of 1296	2964	rmass.exe	29
PID 2964 wrote to memory of 1296	2964	rmass.exe	29
PID 2964 wrote to memory of 1296	2964	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1216
- C:\Users\Admin\AppData\Local\Temp\49327ef8ca4bfcef904c0059f9798110_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\49327ef8ca4bfcef904c0059f9798110_NEIKI.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2940
- - 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
    - 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:2964
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1296

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
cd631b522f14e966690db571a2aa1f5d

SHA1
e2a0116fc121021032249647f4db150c23832963

SHA256
9439e6b610bef37cd912ca5cbf4d1847fa0b232bf55fd185747996402b258d72

SHA512
f3cfbb13c5680708e74abaaa77336b00ee55bab4af08820b65ae9219be63d33def4b4d3953386dd5c3dde4f715f447ac559588597b3cce9fb4d4b6beec044597

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

Filesize
24KB

MD5
243151c640242064c87119680f8ee137

SHA1
a39183d7dc660595fff77575a12326369ef7716f

SHA256
93e126b57e2d4fbb8668910856900a8766e9e4fa9c43be995c4eaa6f88311006

SHA512
00651c2ade614f027f71e39dcafd1ce2d49fcb597b2e72cf32f0296b868a8cce606204489b03bbd5991c8b8c6fdaa26169e9e2ba4b3183da8bde0eb3d60f2fc2

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
21KB

MD5
10b6d91df837ae2772d4dec867f9a6b6

SHA1
1315debb80870b36cb995549b102474fd685ced0

SHA256
632e3bf404c9bf6657decff42253b02416715f5ed9ccf5864a5bb031b90eb789

SHA512
72fccc0e6d9e921cb29aebc67e09c983476c5ac2dd13c28e8707d48ee5b01ba19eb6f984c0eec16bdd48a00bba4fef0349cb41a8fe953784e6325aafa4eda23d

Download Submit
memory/1296-21-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1296-56-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2940-2-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download
memory/2940-8-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/2964-55-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads