xpertrat | 0b3ee4059f431e5bfd85d8bfcce4bb5d2a33b40baca82a36dbca89ea5e4a14b3

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"	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe

Windows security bypass 2 TTPs 1 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe

XpertRAT
XpertRAT is a remote access trojan with various capabilities.
rat xpertrat

XpertRAT Core payload 1 IoCs

resource	yara_rule
behavioral2/memory/4132-19-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5068-35-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4456-37-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/5068-35-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/4456-37-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral2/memory/3680-46-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4 = "C:\\Users\\Admin\\AppData\\Roaming\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4.exe"	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	iexplore.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2036-30-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/700-45-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Windows security modification 2 TTPs 1 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	iexplore.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4 = "C:\\Users\\Admin\\AppData\\Roaming\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4.exe"	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4 = "C:\\Users\\Admin\\AppData\\Roaming\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4.exe"	iexplore.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe

Program crash 4 IoCs

pid	pid_target	Process	procid_target
1676	3740	WerFault.exe	93
3960	3552	WerFault.exe	97
3908	1892	WerFault.exe	101
5044	1400	WerFault.exe	104

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 4712 set thread context of 4516	4712	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	89
PID 4516 set thread context of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4132 set thread context of 2036	4132	iexplore.exe	92
PID 4132 set thread context of 3740	4132	iexplore.exe	93
PID 4132 set thread context of 5068	4132	iexplore.exe	96
PID 4132 set thread context of 3552	4132	iexplore.exe	97
PID 4132 set thread context of 4456	4132	iexplore.exe	100
PID 4132 set thread context of 1892	4132	iexplore.exe	101
PID 4132 set thread context of 1400	4132	iexplore.exe	104
PID 4132 set thread context of 700	4132	iexplore.exe	107
PID 4132 set thread context of 3680	4132	iexplore.exe	108

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe
4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe
4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe
4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe
2036	iexplore.exe
2036	iexplore.exe
4456	iexplore.exe
4456	iexplore.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4132	iexplore.exe
Token: SeDebugPrivilege	2036	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe
4132	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4712 wrote to memory of 4516	4712	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	89
PID 4712 wrote to memory of 4516	4712	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	89
PID 4712 wrote to memory of 4516	4712	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	89
PID 4712 wrote to memory of 4516	4712	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	89
PID 4712 wrote to memory of 4516	4712	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	89
PID 4712 wrote to memory of 4516	4712	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	89
PID 4712 wrote to memory of 4516	4712	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	89
PID 4516 wrote to memory of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4516 wrote to memory of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4516 wrote to memory of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4516 wrote to memory of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4516 wrote to memory of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4516 wrote to memory of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4516 wrote to memory of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4516 wrote to memory of 4132	4516	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe	90
PID 4132 wrote to memory of 2036	4132	iexplore.exe	92
PID 4132 wrote to memory of 2036	4132	iexplore.exe	92
PID 4132 wrote to memory of 2036	4132	iexplore.exe	92
PID 4132 wrote to memory of 2036	4132	iexplore.exe	92
PID 4132 wrote to memory of 2036	4132	iexplore.exe	92
PID 4132 wrote to memory of 2036	4132	iexplore.exe	92
PID 4132 wrote to memory of 2036	4132	iexplore.exe	92
PID 4132 wrote to memory of 2036	4132	iexplore.exe	92
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 3740	4132	iexplore.exe	93
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 5068	4132	iexplore.exe	96
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 3552	4132	iexplore.exe	97
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 4456	4132	iexplore.exe	100
PID 4132 wrote to memory of 1892	4132	iexplore.exe	101
PID 4132 wrote to memory of 1892	4132	iexplore.exe	101
PID 4132 wrote to memory of 1892	4132	iexplore.exe	101
PID 4132 wrote to memory of 1892	4132	iexplore.exe	101
PID 4132 wrote to memory of 1892	4132	iexplore.exe	101

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe

C:\Users\Admin\AppData\Local\Temp\27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe
"C:\Users\Admin\AppData\Local\Temp\27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4712
- C:\Users\Admin\AppData\Local\Temp\27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe
  "C:\Users\Admin\AppData\Local\Temp\27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe"
  2⤵
  - UAC bypass
  - Windows security bypass
  - Windows security modification
  - Checks whether UAC is enabled
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:4516
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\27216219fbe93818c217c05b66b6586ab58bb000b1c9bc96da93561923f1fce9.exe
    3⤵
    - Adds policy Run key to start application
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4132
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna0.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2036
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna1.txt"
      4⤵
      PID:3740
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3740 -s 84
        5⤵
        Program crash
        
        PID:1676
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna1.txt"
      4⤵
      Accesses Microsoft Outlook accounts
      PID:5068
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna2.txt"
      4⤵
      PID:3552
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3552 -s 84
        5⤵
        Program crash
        
        PID:3960
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna2.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4456
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna3.txt"
      4⤵
      PID:1892
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1892 -s 84
        5⤵
        Program crash
        
        PID:3908
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna3.txt"
      4⤵
      PID:1400
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1400 -s 84
        5⤵
        Program crash
        
        PID:5044
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna3.txt"
      4⤵
      PID:700
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\yhtgyhyna4.txt"
      4⤵
      PID:3680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3740 -ip 3740
1⤵
PID:2144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 3552 -ip 3552
1⤵
PID:4372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 1892 -ip 1892
1⤵
PID:2016

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1400 -ip 1400
1⤵
PID:1564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry