xpertrat | be15093a407e5b70f5539df5eb1c18d0aedee626f6dc7e9db262c29bfe39ba3c

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

Windows security bypass 2 TTPs 1 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

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

XpertRAT Core payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4992-19-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/1408-37-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/5116-38-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1408-37-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/5116-38-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral2/memory/628-45-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

iexplore.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	iexplore.exe
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

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4956-36-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/2572-44-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Windows security modification 2 TTPs 1 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

iexplore.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\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

Processes:

iexplore.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\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

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

Program crash 3 IoCs

Processes:

WerFault.exeWerFault.exeWerFault.exe

pid pid_target process target process

4672 1724 WerFault.exe iexplore.exe
3288 404 WerFault.exe iexplore.exe
2796 3116 WerFault.exe iexplore.exe

pid	pid_target	process	target process
4672	1724	WerFault.exe	iexplore.exe
3288	404	WerFault.exe	iexplore.exe
2796	3116	WerFault.exe	iexplore.exe

Suspicious use of SetThreadContext 10 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.execb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exe

description	pid	process	target process
PID 3916 set thread context of 1916	3916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 1916 set thread context of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 4992 set thread context of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 set thread context of 404	4992	iexplore.exe	iexplore.exe
PID 4992 set thread context of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 set thread context of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 set thread context of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 set thread context of 5116	4992	iexplore.exe	iexplore.exe
PID 4992 set thread context of 2572	4992	iexplore.exe	iexplore.exe
PID 4992 set thread context of 628	4992	iexplore.exe	iexplore.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exeiexplore.exe

pid	process
1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
4956	iexplore.exe
4956	iexplore.exe
5116	iexplore.exe
5116	iexplore.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

iexplore.exeiexplore.exe

description pid process

Token: SeDebugPrivilege 4992 iexplore.exe
Token: SeDebugPrivilege 4956 iexplore.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exe

pid process

1916 cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
4992 iexplore.exe

description	pid	process
Token: SeDebugPrivilege	4992	iexplore.exe
Token: SeDebugPrivilege	4956	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.execb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exe

description	pid	process	target process
PID 3916 wrote to memory of 1916	3916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 3916 wrote to memory of 1916	3916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 3916 wrote to memory of 1916	3916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 3916 wrote to memory of 1916	3916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 3916 wrote to memory of 1916	3916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 3916 wrote to memory of 1916	3916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 3916 wrote to memory of 1916	3916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 1916 wrote to memory of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 1916 wrote to memory of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 1916 wrote to memory of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 1916 wrote to memory of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 1916 wrote to memory of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 1916 wrote to memory of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 1916 wrote to memory of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 1916 wrote to memory of 4992	1916	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 4992 wrote to memory of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1724	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 404	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 404	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 404	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 404	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 404	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 404	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 404	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 404	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 3116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 4956	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 1408	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 5116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 5116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 5116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 5116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 5116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 5116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 5116	4992	iexplore.exe	iexplore.exe
PID 4992 wrote to memory of 5116	4992	iexplore.exe	iexplore.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe

C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
"C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3916
- C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
  "C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6.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:1916
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6.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:4992
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\umhtgvcuu0.txt"
      4⤵
      PID:1724
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1724 -s 84
        5⤵
        Program crash
        
        PID:4672
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\umhtgvcuu0.txt"
      4⤵
      PID:404
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 404 -s 84
        5⤵
        Program crash
        
        PID:3288
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\umhtgvcuu0.txt"
      4⤵
      PID:3116
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3116 -s 84
        5⤵
        Program crash
        
        PID:2796
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\umhtgvcuu0.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4956
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\umhtgvcuu1.txt"
      4⤵
      Accesses Microsoft Outlook accounts
      PID:1408
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\umhtgvcuu2.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:5116
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\umhtgvcuu3.txt"
      4⤵
      PID:2572
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\umhtgvcuu4.txt"
      4⤵
      PID:628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1724 -ip 1724
1⤵
PID:440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 404 -ip 404
1⤵
PID:1964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 364 -p 3116 -ip 3116
1⤵
PID:4404

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

3

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection