6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6

General

Target

a09d4a606443ecbee935532ae68954f0_NEIKI.exe
Size

21KB
MD5

a09d4a606443ecbee935532ae68954f0
SHA1

8a551e63708d2e0855d07b1b7c3e1c543ba0141a
SHA256

6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6
SHA512

3990709f2ff65d10ffdf60ad4a1f09fda9154d49f849988a6adc608af81762d22d32498c7dcca3811478c8e12b75200a2d27c67c2ddf0f532427c8f2b3e6455c
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a67:rRkiLw3HsDSARGG/MMb7r7

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\{59434C45-5854-414c-5943-4C455854414c}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{59434C45-5854-414c-5943-4C455854414c}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{59434C45-5854-414c-5943-4C455854414c}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{59434C45-5854-414c-5943-4C455854414c}\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
116	rmass.exe
4976	rmass.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3992-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3992-7-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0007000000023305-6.dat	upx
behavioral2/memory/116-51-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4976-52-0x0000000000400000-0x0000000000411000-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\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	a09d4a606443ecbee935532ae68954f0_NEIKI.exe
File created	C:\Windows\SysWOW64\rmass.exe	a09d4a606443ecbee935532ae68954f0_NEIKI.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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.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\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\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 8 IoCs

pid	Process
116	rmass.exe
116	rmass.exe
116	rmass.exe
116	rmass.exe
116	rmass.exe
116	rmass.exe
4976	rmass.exe
4976	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3992	a09d4a606443ecbee935532ae68954f0_NEIKI.exe
Token: SeDebugPrivilege	116	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3992 wrote to memory of 116	3992	a09d4a606443ecbee935532ae68954f0_NEIKI.exe	83
PID 3992 wrote to memory of 116	3992	a09d4a606443ecbee935532ae68954f0_NEIKI.exe	83
PID 3992 wrote to memory of 116	3992	a09d4a606443ecbee935532ae68954f0_NEIKI.exe	83
PID 116 wrote to memory of 4976	116	rmass.exe	84
PID 116 wrote to memory of 4976	116	rmass.exe	84
PID 116 wrote to memory of 4976	116	rmass.exe	84
PID 116 wrote to memory of 584	116	rmass.exe	5
PID 116 wrote to memory of 3444	116	rmass.exe	56

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:584

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3444
- C:\Users\Admin\AppData\Local\Temp\a09d4a606443ecbee935532ae68954f0_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\a09d4a606443ecbee935532ae68954f0_NEIKI.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3992
- - 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
    - 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:116
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:4976

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
17dc41a3a3541f46e76b3a1af8d78eb8

SHA1
73336a52792a3a49fac1c2cb43762806be195e6c

SHA256
20e60b050c7e319d59aad4de4eb0a262f5ec0abe6933b255f4e9db20d780af93

SHA512
37a5bb55f85c6851f586d9618d34c1fed4640e417a7bc1f6514abb4ae3172023e512dffa12e1bf2d7602c55c59397f36bd045464cda978951c287ad844d9674b

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

Filesize
24KB

MD5
cf62deda82d811e369f75b9e0ea09f37

SHA1
f0420104ee34f6e30edaa3462274dda3fc3edd08

SHA256
d3234c1fee53a690d5ffaac772654bcf5e1910afdc4711c4904800f653f70479

SHA512
fb07d74d879e7226e3805d7973618847e130f172a34e82c8b78fa920813823157893b507ee81db123a857375d1625e0c695dd15e5cff0499f7c825f3aea328c7

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

Filesize
21KB

MD5
a09d4a606443ecbee935532ae68954f0

SHA1
8a551e63708d2e0855d07b1b7c3e1c543ba0141a

SHA256
6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6

SHA512
3990709f2ff65d10ffdf60ad4a1f09fda9154d49f849988a6adc608af81762d22d32498c7dcca3811478c8e12b75200a2d27c67c2ddf0f532427c8f2b3e6455c

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/116-51-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3992-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3992-7-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4976-52-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads