floxif | 866bdba016657801637c10e53724538d4b9d2cb86429d1e82a8451312ea51250

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	09ffbeecf61eaa93ab37833f6b1c0430N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	MusaLLaT.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	MusaLLaT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	09ffbeecf61eaa93ab37833f6b1c0430N.exe

Detects Floxif payload 1 IoCs

backdoor

resource	yara_rule
behavioral1/files/0x00090000000120f9-2.dat	floxif

Drops file in Drivers directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\system32\drivers\etc\hosts	MusaLLaT.exe
File opened for modification	C:\WINDOWS\system32\drivers\etc\hosts	MusaLLaT.exe

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x00090000000120f9-2.dat	acprotect

Executes dropped EXE 1 IoCs

pid	Process
2852	MusaLLaT.exe

Loads dropped DLL 13 IoCs

pid	Process
2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe
2440	arp.exe
2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe
2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe
2852	MusaLLaT.exe
2648	arp.exe
2236	arp.exe
3048	arp.exe
2756	arp.exe
2628	arp.exe
2652	arp.exe
3056	arp.exe
2732	arp.exe

UPX packed file 29 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2068-0-0x0000000000400000-0x000000000049F000-memory.dmp	upx
behavioral1/files/0x00090000000120f9-2.dat	upx
behavioral1/memory/2068-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2440-10-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2440-11-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2852-26-0x0000000000400000-0x000000000049F000-memory.dmp	upx
behavioral1/files/0x00070000000161fd-24.dat	upx
behavioral1/memory/2852-28-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2648-34-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2236-36-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2628-46-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2068-42-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2068-40-0x0000000000400000-0x000000000049F000-memory.dmp	upx
behavioral1/memory/3048-41-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2756-45-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2652-48-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/3056-50-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2756-52-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2236-56-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2732-63-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2648-58-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/3048-65-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2628-54-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/3056-67-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2652-68-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2732-70-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2852-71-0x0000000000400000-0x000000000049F000-memory.dmp	upx
behavioral1/memory/2852-72-0x0000000000400000-0x000000000049F000-memory.dmp	upx
behavioral1/memory/2852-74-0x0000000010000000-0x0000000010033000-memory.dmp	upx

Windows security modification 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	09ffbeecf61eaa93ab37833f6b1c0430N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	MusaLLaT.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Run\MusaLLaT = "C:\\Users\\Admin\\AppData\\Roaming\\MusaLLaT.exe"	MusaLLaT.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	09ffbeecf61eaa93ab37833f6b1c0430N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	MusaLLaT.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	09ffbeecf61eaa93ab37833f6b1c0430N.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2852	MusaLLaT.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe
Token: SeDebugPrivilege	2440	arp.exe
Token: SeBackupPrivilege	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe
Token: SeDebugPrivilege	2852	MusaLLaT.exe
Token: SeBackupPrivilege	2852	MusaLLaT.exe
Token: SeDebugPrivilege	2648	arp.exe
Token: SeDebugPrivilege	3048	arp.exe
Token: SeDebugPrivilege	2652	arp.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe
2852	MusaLLaT.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 2440	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	30
PID 2068 wrote to memory of 2440	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	30
PID 2068 wrote to memory of 2440	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	30
PID 2068 wrote to memory of 2440	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	30
PID 2068 wrote to memory of 2852	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	32
PID 2068 wrote to memory of 2852	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	32
PID 2068 wrote to memory of 2852	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	32
PID 2068 wrote to memory of 2852	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	32
PID 2068 wrote to memory of 2648	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	33
PID 2068 wrote to memory of 2648	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	33
PID 2068 wrote to memory of 2648	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	33
PID 2068 wrote to memory of 2648	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	33
PID 2068 wrote to memory of 2236	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	34
PID 2068 wrote to memory of 2236	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	34
PID 2068 wrote to memory of 2236	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	34
PID 2068 wrote to memory of 2236	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	34
PID 2068 wrote to memory of 3048	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	35
PID 2068 wrote to memory of 3048	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	35
PID 2068 wrote to memory of 3048	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	35
PID 2068 wrote to memory of 3048	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	35
PID 2068 wrote to memory of 3056	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	36
PID 2068 wrote to memory of 3056	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	36
PID 2068 wrote to memory of 3056	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	36
PID 2068 wrote to memory of 3056	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	36
PID 2068 wrote to memory of 2652	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	37
PID 2068 wrote to memory of 2652	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	37
PID 2068 wrote to memory of 2652	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	37
PID 2068 wrote to memory of 2652	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	37
PID 2068 wrote to memory of 2756	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	40
PID 2068 wrote to memory of 2756	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	40
PID 2068 wrote to memory of 2756	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	40
PID 2068 wrote to memory of 2756	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	40
PID 2068 wrote to memory of 2732	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	41
PID 2068 wrote to memory of 2732	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	41
PID 2068 wrote to memory of 2732	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	41
PID 2068 wrote to memory of 2732	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	41
PID 2068 wrote to memory of 2628	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	42
PID 2068 wrote to memory of 2628	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	42
PID 2068 wrote to memory of 2628	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	42
PID 2068 wrote to memory of 2628	2068	09ffbeecf61eaa93ab37833f6b1c0430N.exe	42

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	09ffbeecf61eaa93ab37833f6b1c0430N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	MusaLLaT.exe

C:\Users\Admin\AppData\Local\Temp\09ffbeecf61eaa93ab37833f6b1c0430N.exe
"C:\Users\Admin\AppData\Local\Temp\09ffbeecf61eaa93ab37833f6b1c0430N.exe"
1⤵
- UAC bypass
- Windows security bypass
- Loads dropped DLL
- Windows security modification
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2068
- C:\Windows\SysWOW64\arp.exe
  arp -a
  2⤵
  - Loads dropped DLL
  - Suspicious use of AdjustPrivilegeToken
  PID:2440
- C:\Users\Admin\AppData\Roaming\MusaLLaT.exe
  C:\Users\Admin\AppData\Roaming\MusaLLaT.exe
  2⤵
  - UAC bypass
  - Windows security bypass
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Loads dropped DLL
  - Windows security modification
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - System policy modification
  PID:2852
- C:\Windows\SysWOW64\arp.exe
  arp -s 10.127.0.1 ee-94-6d-8b-61-4a
  2⤵
  - Loads dropped DLL
  - Suspicious use of AdjustPrivilegeToken
  PID:2648
- C:\Windows\SysWOW64\arp.exe
  arp -s 10.127.255.255 b4-d0-56-1f-b6-e0
  2⤵
  - Loads dropped DLL
  PID:2236
- C:\Windows\SysWOW64\arp.exe
  arp -s 136.243.76.173 82-1d-dd-b8-68-00
  2⤵
  - Loads dropped DLL
  - Suspicious use of AdjustPrivilegeToken
  PID:3048
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.22 b2-32-63-92-9a-51
  2⤵
  - Loads dropped DLL
  PID:3056
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.251 02-14-06-97-3a-54
  2⤵
  - Loads dropped DLL
  - Suspicious use of AdjustPrivilegeToken
  PID:2652
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.252 46-5d-12-67-80-60
  2⤵
  - Loads dropped DLL
  PID:2756
- C:\Windows\SysWOW64\arp.exe
  arp -s 239.255.255.250 67-0c-33-c8-f0-23
  2⤵
  - Loads dropped DLL
  PID:2732
- C:\Windows\SysWOW64\arp.exe
  arp -s 255.255.255.255 dd-e5-d9-b0-87-13
  2⤵
  - Loads dropped DLL
  PID:2628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry