7d8624ed52ffd3b85da670994bfaefded16c7849ce5935f4a912c06fc769aa05

General

Target

a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
Size

19KB
MD5

a5dd2daa6666502240d5a7bb0d6611b0
SHA1

2df076f3411d8745a19ce00bdea81fd62894e677
SHA256

7d8624ed52ffd3b85da670994bfaefded16c7849ce5935f4a912c06fc769aa05
SHA512

de3350a6ccbe5a38795b63e50d4146e25aec8de9fb668d23d3a1884c0514bcfe2d3a27a9363892d2c8b8ac42d7001f609ae7e4f501122764fd3246aced4c9012
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX+fauB:rRkiLw3HsDSARGG/uv

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\{4B584950-5043-4b46-4B58-495050434b46}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4B584950-5043-4b46-4B58-495050434b46}\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Windows\\system32\\ntdbg.exe"	rmass.exe
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

Executes dropped EXE 2 IoCs

pid	Process
1820	rmass.exe
1316	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2240	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
2240	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
1820	rmass.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2240-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0009000000016d24-4.dat	upx
behavioral1/memory/2240-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1316-25-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1820-59-0x0000000000400000-0x0000000000411000-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
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\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
File created	C:\Windows\SysWOW64\rmass.exe	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
File created	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 opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	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\aset32.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
1820	rmass.exe
1820	rmass.exe
1820	rmass.exe
1316	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2240	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
Token: SeDebugPrivilege	1820	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 1820	2240	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe	30
PID 2240 wrote to memory of 1820	2240	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe	30
PID 2240 wrote to memory of 1820	2240	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe	30
PID 2240 wrote to memory of 1820	2240	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe	30
PID 1820 wrote to memory of 420	1820	rmass.exe	5
PID 1820 wrote to memory of 1212	1820	rmass.exe	21
PID 1820 wrote to memory of 1316	1820	rmass.exe	31
PID 1820 wrote to memory of 1316	1820	rmass.exe	31
PID 1820 wrote to memory of 1316	1820	rmass.exe	31
PID 1820 wrote to memory of 1316	1820	rmass.exe	31

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:420

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1212
- C:\Users\Admin\AppData\Local\Temp\a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2240
- - 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:1820
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1316

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
21KB

MD5
d70b5f055d720465893e70214f55f19c

SHA1
543acb2b7505e80bce804f8a6a19c8fc36a54a38

SHA256
bb58da5564ecaa1d9b9ac4263ca9017387ebf03be86c75567ef008734c5402a5

SHA512
cf31c909f178f7e06d56225903a7d15f369514e527f795bc5f7b63ad1af81f2bde04f42069144ce4c77dca23ee2984597a81f8ed75992dd4d68209ed330c57ed

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

Filesize
22KB

MD5
5bdfc9e57e3b7cea30c029c051f1e727

SHA1
008380d4412c87828ad635d1128ae2be82ecf039

SHA256
c828fddc35c0c4084b0d88439a136914a22b9722f8934a188ae3a0c2e17bf9e3

SHA512
f9e71c04d212caaebf102701562e79387f2c1fb2f1c809fe99d8de0eeded541344e88623731e7b93cbe5b9f242cd861a7f92b2dfa0b550dcae906e1812a86c45

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
19KB

MD5
a5dd2daa6666502240d5a7bb0d6611b0

SHA1
2df076f3411d8745a19ce00bdea81fd62894e677

SHA256
7d8624ed52ffd3b85da670994bfaefded16c7849ce5935f4a912c06fc769aa05

SHA512
de3350a6ccbe5a38795b63e50d4146e25aec8de9fb668d23d3a1884c0514bcfe2d3a27a9363892d2c8b8ac42d7001f609ae7e4f501122764fd3246aced4c9012

Download Submit
memory/1316-25-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1820-24-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/1820-59-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1820-99-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/2240-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2240-12-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads