4672e5a178fc023be578c92ff551ff106837336c596824d3c46f2f48d6e6f798

General

Target

f537775e473e7ef09eaffb24889df490_NEIKI.exe
Size

21KB
MD5

f537775e473e7ef09eaffb24889df490
SHA1

b41031414c7ba6dc3b0f57ee7b84cc9942d06edb
SHA256

4672e5a178fc023be578c92ff551ff106837336c596824d3c46f2f48d6e6f798
SHA512

49a73992cd501c05b303bf9ff5ade07745c666703f961816ae9238b30e7ed4b51ad1be8d46f932fd9a351be170ce6dcd4a43e5355a29b3824dcae7a777186a70
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6khL:rRkiLw3HsDSARGG/MMb7rO

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\{47594C51-574a-434e-4759-4C51574A434e}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{47594C51-574a-434e-4759-4C51574A434e}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{47594C51-574a-434e-4759-4C51574A434e}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{47594C51-574a-434e-4759-4C51574A434e}\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\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
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	rmass.exe

Executes dropped EXE 2 IoCs

pid	Process
3128	rmass.exe
920	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3068-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3068-8-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3128-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x00090000000235e3-14.dat	upx
behavioral2/memory/3128-52-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/920-53-0x0000000000400000-0x0000000000411000-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
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 opened for modification	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\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.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\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	f537775e473e7ef09eaffb24889df490_NEIKI.exe
File created	C:\Windows\SysWOW64\rmass.exe	f537775e473e7ef09eaffb24889df490_NEIKI.exe
File opened for modification	C:\Windows\SysWOW64\rmass.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\aset32.exe	rmass.exe
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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3128	rmass.exe
3128	rmass.exe
3128	rmass.exe
3128	rmass.exe
3128	rmass.exe
3128	rmass.exe
920	rmass.exe
920	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	f537775e473e7ef09eaffb24889df490_NEIKI.exe
Token: SeDebugPrivilege	3128	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 3128	3068	f537775e473e7ef09eaffb24889df490_NEIKI.exe	87
PID 3068 wrote to memory of 3128	3068	f537775e473e7ef09eaffb24889df490_NEIKI.exe	87
PID 3068 wrote to memory of 3128	3068	f537775e473e7ef09eaffb24889df490_NEIKI.exe	87
PID 3128 wrote to memory of 920	3128	rmass.exe	88
PID 3128 wrote to memory of 920	3128	rmass.exe	88
PID 3128 wrote to memory of 920	3128	rmass.exe	88
PID 3128 wrote to memory of 604	3128	rmass.exe	5
PID 3128 wrote to memory of 3524	3128	rmass.exe	56

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:604

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3524
- C:\Users\Admin\AppData\Local\Temp\f537775e473e7ef09eaffb24889df490_NEIKI.exe
  "C:\Users\Admin\AppData\Local\Temp\f537775e473e7ef09eaffb24889df490_NEIKI.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3068
- - 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:3128
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:920

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3348,i,13879737908471496610,15335851594401413307,262144 --variations-seed-version --mojo-platform-channel-handle=4300 /prefetch:8
1⤵
PID:1280

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
24KB

MD5
73775443ca0b7735c2e162823850102f

SHA1
fe17c408d003d8ecf5bb8ac36a5eef269ee982fc

SHA256
3a6250f88711c8c45ab303c4fb440f90ef48d5f4e04afe74b896352381e496f5

SHA512
0d4b046d197b0414cbe4317b46405159d56b4ceba3ea5e431218fbb5731120d7ebdf05aa74faea34d9a712b60e2fbf0c03338d5d7b152b1a6fd4e0d9661a345b

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

Filesize
25KB

MD5
2c16858aee4f0f50fc5ee79ae5cacb1c

SHA1
8eb76dc3da717252829bbed8877182e1fa3c0843

SHA256
40793c841974c21f37d402b3ca0c2ddebea4bcdaa8f576c1335100bdb2575ae3

SHA512
d612cfc366e1ab97a28453acdb5eee6d300d71a9f84127cb1ed40ac30526b56e39362cae638e8df1e77020f37b41202153293e598efaf47781eda4c788b9ab04

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

Filesize
21KB

MD5
f537775e473e7ef09eaffb24889df490

SHA1
b41031414c7ba6dc3b0f57ee7b84cc9942d06edb

SHA256
4672e5a178fc023be578c92ff551ff106837336c596824d3c46f2f48d6e6f798

SHA512
49a73992cd501c05b303bf9ff5ade07745c666703f961816ae9238b30e7ed4b51ad1be8d46f932fd9a351be170ce6dcd4a43e5355a29b3824dcae7a777186a70

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/920-53-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3068-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3068-8-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3128-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3128-52-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads