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\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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "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\{4F424A49-5955-4945-4F42-4A4959554945}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F424A49-5955-4945-4F42-4A4959554945}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F424A49-5955-4945-4F42-4A4959554945}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F424A49-5955-4945-4F42-4A4959554945}\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
1256	rmass.exe
3420	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3820-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3820-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000900000002328e-16.dat	upx
behavioral2/memory/1256-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3420-19-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1256-53-0x0000000000400000-0x0000000000411000-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}\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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
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\rmass.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\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
File opened for modification	C:\Windows\SysWOW64\rmass.exe	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
File created	C:\Windows\SysWOW64\rmass.exe	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.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 8 IoCs

pid	Process
1256	rmass.exe
1256	rmass.exe
1256	rmass.exe
1256	rmass.exe
1256	rmass.exe
1256	rmass.exe
3420	rmass.exe
3420	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3820	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
Token: SeDebugPrivilege	1256	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3820 wrote to memory of 1256	3820	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe	80
PID 3820 wrote to memory of 1256	3820	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe	80
PID 3820 wrote to memory of 1256	3820	a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe	80
PID 1256 wrote to memory of 620	1256	rmass.exe	5
PID 1256 wrote to memory of 3556	1256	rmass.exe	56
PID 1256 wrote to memory of 3420	1256	rmass.exe	81
PID 1256 wrote to memory of 3420	1256	rmass.exe	81
PID 1256 wrote to memory of 3420	1256	rmass.exe	81

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:620

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3556
- C:\Users\Admin\AppData\Local\Temp\a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\a5dd2daa6666502240d5a7bb0d6611b0_NEIKI.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3820
- - 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:1256
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3420

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
fdb3302732bea53708111b958375317d

SHA1
f8c1ee820af7b77859c93344bc2ea33f3aecb15b

SHA256
0c5075f6d9eef691851cc8bf598525be8e0ffac5cb097b0435f49c8867f65f9b

SHA512
d74b188bb9e4e9b51450794a3965db09c981071d76f469de949ed36cfac5fea4b1b5fdbda22276a34f89c1cc07301b9f67a65d2d6f24fdaaaa6f87e98f57f115

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

Filesize
22KB

MD5
bdcbcbcd475c46ab8eef6b2b62ea3a8e

SHA1
d069d5e1c8ce848df82e856e8381183f2b8aabd8

SHA256
93f2de04a49df40defd7c1787ec42d68b4b0a1a5438a7433d322c0281f6d6346

SHA512
48680654026f6c4d45f238d26e8de397a0cc2a461a0083fbd077bc2722d7a84a065ac9c183c64c206d0c5e03c77c555820c9c5b531b99ef54fb45c29d895417b

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

Filesize
19KB

MD5
a5dd2daa6666502240d5a7bb0d6611b0

SHA1
2df076f3411d8745a19ce00bdea81fd62894e677

SHA256
7d8624ed52ffd3b85da670994bfaefded16c7849ce5935f4a912c06fc769aa05

SHA512
de3350a6ccbe5a38795b63e50d4146e25aec8de9fb668d23d3a1884c0514bcfe2d3a27a9363892d2c8b8ac42d7001f609ae7e4f501122764fd3246aced4c9012

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1256-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1256-53-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3420-19-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3820-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3820-12-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads