9b134817c6265a60d82c47277cf06b3c1cb495f6f75faade94e437032f2a5b97

General

Target

f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe
Size

63KB
MD5

f2c5835996b347d8db9621bd4e5de4d1
SHA1

16e6f96e032425aab38b009c3539e8e408910264
SHA256

9b134817c6265a60d82c47277cf06b3c1cb495f6f75faade94e437032f2a5b97
SHA512

8889a66d02e88160385b767cac8d882ca0897dc1ec204789ba6a48579bbb8719f43dd1c07689e553a0d105f6a3c086e06865054af0172ed32a984f37bdb6f42f
SSDEEP

768:rAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGKQLddOW/Y4Wv0eKIs88:sUNHFKQbIkHvGMdOP4wC

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\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

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\{495A4B43-4b4f-5450-495A-4B434B4F5450}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{495A4B43-4b4f-5450-495A-4B434B4F5450}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{495A4B43-4b4f-5450-495A-4B434B4F5450}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{495A4B43-4b4f-5450-495A-4B434B4F5450}\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
2424	rmass.exe
2552	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2008	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe
2008	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe
2424	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2008-0-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral1/files/0x000c000000015d79-4.dat	upx
behavioral1/memory/2424-12-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral1/memory/2008-10-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral1/memory/2424-78-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral1/memory/2552-94-0x0000000000400000-0x0000000000412000-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
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
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify	rmass.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe
File created	C:\Windows\SysWOW64\rmass.exe	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.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\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\System\idbg32.exe	rmass.exe
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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2424	rmass.exe
2424	rmass.exe
2424	rmass.exe
2552	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2008	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe
Token: SeDebugPrivilege	2424	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 2424	2008	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe	28
PID 2008 wrote to memory of 2424	2008	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe	28
PID 2008 wrote to memory of 2424	2008	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe	28
PID 2008 wrote to memory of 2424	2008	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe	28
PID 2424 wrote to memory of 424	2424	rmass.exe	5
PID 2424 wrote to memory of 1180	2424	rmass.exe	21
PID 2424 wrote to memory of 2552	2424	rmass.exe	29
PID 2424 wrote to memory of 2552	2424	rmass.exe	29
PID 2424 wrote to memory of 2552	2424	rmass.exe	29
PID 2424 wrote to memory of 2552	2424	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:424

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1180
- C:\Users\Admin\AppData\Local\Temp\f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2008
- - 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:2424
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2552

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

Replay Monitor

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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
65KB

MD5
6cde077412395c566525190b2a4fc04c

SHA1
c0c1818f9cbe365a52913df95622de033041ba9b

SHA256
d49cb9cc354de43f8458f6aa1ab7ff69563ba33a8da8c54deb66d74b61644d1b

SHA512
be384a6b4d074bbd8d83aebab5e64ae6ed8b00d5ca94f3feda94698d4b8dbc1c6af2e604b374559f09f05a352b915416f8ee068a9e066387997797f0cca68f67

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

Filesize
66KB

MD5
38a4b88cedf9a726e2c5bf028e493768

SHA1
e000721708bcc6b46b5afb7222a91dffc49eaaa9

SHA256
3dcef50c9c44a54534a9407cd25d8b8db2a8ac5b2df04bcefd790cc44c086802

SHA512
183090696b01aa7aa45d50814e35158d27c4c16c1736c279617737be45b3ffcc6bf14d71b3093f57711fc88508219b3f987a868b30270301cca851130d206499

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
63KB

MD5
f2c5835996b347d8db9621bd4e5de4d1

SHA1
16e6f96e032425aab38b009c3539e8e408910264

SHA256
9b134817c6265a60d82c47277cf06b3c1cb495f6f75faade94e437032f2a5b97

SHA512
8889a66d02e88160385b767cac8d882ca0897dc1ec204789ba6a48579bbb8719f43dd1c07689e553a0d105f6a3c086e06865054af0172ed32a984f37bdb6f42f

Download Submit
memory/2008-0-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2008-10-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2424-12-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2424-78-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2552-94-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads