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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{534E4656-4751-4c55-534E-465647514c55}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{534E4656-4751-4c55-534E-465647514c55}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{534E4656-4751-4c55-534E-465647514c55}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{534E4656-4751-4c55-534E-465647514c55}\IsInstalled = "1"	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
3876	rmass.exe
1800	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/files/0x0007000000023276-5.dat	upx
behavioral2/memory/4788-7-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/3876-8-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/1800-18-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/3876-52-0x0000000000400000-0x0000000000412000-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\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\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 created	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\rmass.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 opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	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 8 IoCs

pid	Process
3876	rmass.exe
3876	rmass.exe
3876	rmass.exe
3876	rmass.exe
3876	rmass.exe
3876	rmass.exe
1800	rmass.exe
1800	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4788	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe
Token: SeDebugPrivilege	3876	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 3876	4788	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe	81
PID 4788 wrote to memory of 3876	4788	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe	81
PID 4788 wrote to memory of 3876	4788	f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe	81
PID 3876 wrote to memory of 616	3876	rmass.exe	5
PID 3876 wrote to memory of 3520	3876	rmass.exe	56
PID 3876 wrote to memory of 1800	3876	rmass.exe	82
PID 3876 wrote to memory of 1800	3876	rmass.exe	82
PID 3876 wrote to memory of 1800	3876	rmass.exe	82

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:616

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3520
- C:\Users\Admin\AppData\Local\Temp\f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\f2c5835996b347d8db9621bd4e5de4d1_NEIKI.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4788
- - 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:3876
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1800

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
65KB

MD5
49934a04249987aca13366677e45d11c

SHA1
b6ed33b3b7b3012c442883fbe17f5584c2c8e81d

SHA256
eaee5839e49f71b0f5ff12863a08410e423e0af1b594724cae75241d5755da14

SHA512
979b60b380ddefc2ea9a5038f99ea134ea4dbe094add21eaab1777fe9e728e6d3a1721d1dc1452e59a0a6b9838d698c713d0efd27cd0ea44f6dbce81bfb93994

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

Filesize
66KB

MD5
a5ca2b6f53dc54634e85524af3dcd2b5

SHA1
8303ec5eb7e9bcbff7e6d0062da10255eddea2c0

SHA256
b09e42971543ae3483cd42983c291f6d4940e57d3dbedd635bc8d0b0eb1ff798

SHA512
dd0ba37b2d68647e389d47a49efd36eebcbae2a560c0ba6346d36e5710af6073df6fd886e3fedb5bfdbbc01950a474f55b48ae071195573bdd3f3077d24e13d7

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

Filesize
63KB

MD5
f2c5835996b347d8db9621bd4e5de4d1

SHA1
16e6f96e032425aab38b009c3539e8e408910264

SHA256
9b134817c6265a60d82c47277cf06b3c1cb495f6f75faade94e437032f2a5b97

SHA512
8889a66d02e88160385b767cac8d882ca0897dc1ec204789ba6a48579bbb8719f43dd1c07689e553a0d105f6a3c086e06865054af0172ed32a984f37bdb6f42f

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1800-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3876-8-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3876-52-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4788-0-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4788-7-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads