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/3440-19-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/1304-34-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/2168-36-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1304-34-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/2168-36-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral2/memory/1832-45-0x0000000000400000-0x0000000000415000-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
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

Processes:

resource	yara_rule
behavioral2/memory/3636-33-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/1552-43-0x0000000000400000-0x0000000000416000-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-1-5-21-1926387074-3400613176-3566796709-1000\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-1-5-21-1926387074-3400613176-3566796709-1000\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 5 IoCs

Processes:

WerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exe

pid	pid_target	process	target process
2916	3852	WerFault.exe	iexplore.exe
2684	3068	WerFault.exe	iexplore.exe
1464	4084	WerFault.exe	iexplore.exe
3248	4084	WerFault.exe	iexplore.exe
1784	3632	WerFault.exe	iexplore.exe

Suspicious use of SetThreadContext 11 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.execb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exe

description	pid	process	target process
PID 4092 set thread context of 2144	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 2144 set thread context of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 3440 set thread context of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 set thread context of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 set thread context of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 set thread context of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 set thread context of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 set thread context of 4084	3440	iexplore.exe	iexplore.exe
PID 3440 set thread context of 1552	3440	iexplore.exe	iexplore.exe
PID 3440 set thread context of 3632	3440	iexplore.exe	iexplore.exe
PID 3440 set thread context of 1832	3440	iexplore.exe	iexplore.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.execb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exeiexplore.exe

pid	process
4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
3636	iexplore.exe
3636	iexplore.exe
2168	iexplore.exe
2168	iexplore.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exeiexplore.exe

description	pid	process
Token: SeDebugPrivilege	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
Token: SeDebugPrivilege	3440	iexplore.exe
Token: SeDebugPrivilege	3636	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exe

pid process

2144 cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
3440 iexplore.exe

pid	process
2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
3440	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

cb1ccbc5c88657e1f63a2cd3b1c240b6.execb1ccbc5c88657e1f63a2cd3b1c240b6.exeiexplore.exe

description	pid	process	target process
PID 4092 wrote to memory of 3932	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 3932	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 3932	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 2144	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 2144	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 2144	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 2144	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 2144	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 2144	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 4092 wrote to memory of 2144	4092	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
PID 2144 wrote to memory of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 2144 wrote to memory of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 2144 wrote to memory of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 2144 wrote to memory of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 2144 wrote to memory of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 2144 wrote to memory of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 2144 wrote to memory of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 2144 wrote to memory of 3440	2144	cb1ccbc5c88657e1f63a2cd3b1c240b6.exe	iexplore.exe
PID 3440 wrote to memory of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3636	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 1304	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3852	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 2168	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 3068	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 4084	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 4084	3440	iexplore.exe	iexplore.exe
PID 3440 wrote to memory of 4084	3440	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4092

C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6.exe
"C:\Users\Admin\AppData\Local\Temp\cb1ccbc5c88657e1f63a2cd3b1c240b6.exe"
2⤵
PID:3932

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:2144

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:3440

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde0.txt"
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3636

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde1.txt"
4⤵
- Accesses Microsoft Outlook accounts
PID:1304

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde2.txt"
4⤵
PID:3852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3852 -s 84
5⤵
- Program crash
PID:2916

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde2.txt"
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2168

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde3.txt"
4⤵
PID:3068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3068 -s 84
5⤵
- Program crash
PID:2684

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde3.txt"
4⤵
PID:4084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4084 -s 92
5⤵
- Program crash
PID:1464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4084 -s 100
5⤵
- Program crash
PID:3248

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde3.txt"
4⤵
PID:1552

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde4.txt"
4⤵
PID:3632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3632 -s 84
5⤵
- Program crash
PID:1784

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\kmprxupde4.txt"
4⤵
PID:1832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3852 -ip 3852
1⤵
PID:3232

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 3068 -ip 3068
1⤵
PID:5040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4084 -ip 4084
1⤵
PID:3988

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4084 -ip 4084
1⤵
PID:3380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3632 -ip 3632
1⤵
PID:3136

Network

MITRE ATT&CK Matrix ATT&CK v13

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