xpertrat | f74ab1efa874c19f32108d0719951e9b2a6ab0bb9f9b66c53145e75efec1684b

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	09fefe8f2d0e20847f08ebd26e29741f.exe

Windows security bypass 2 TTPs 1 IoCs

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	09fefe8f2d0e20847f08ebd26e29741f.exe

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

XpertRAT Core payload 1 IoCs

resource	yara_rule
behavioral2/memory/4284-166-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2488-204-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1364-205-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/2488-204-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/1364-205-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral2/memory/4600-212-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

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\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6 = "C:\\Users\\Admin\\AppData\\Roaming\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6.exe"	iexplore.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	09fefe8f2d0e20847f08ebd26e29741f.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4468-203-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4948-211-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Windows security modification 2 TTPs 1 IoCs

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	09fefe8f2d0e20847f08ebd26e29741f.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	iexplore.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6 = "C:\\Users\\Admin\\AppData\\Roaming\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6.exe"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6 = "C:\\Users\\Admin\\AppData\\Roaming\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6.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"	09fefe8f2d0e20847f08ebd26e29741f.exe

Suspicious use of SetThreadContext 7 IoCs

description	pid	Process	procid_target
PID 2992 set thread context of 2372	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	92
PID 2372 set thread context of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 4284 set thread context of 4468	4284	iexplore.exe	94
PID 4284 set thread context of 2488	4284	iexplore.exe	95
PID 4284 set thread context of 1364	4284	iexplore.exe	96
PID 4284 set thread context of 4948	4284	iexplore.exe	97
PID 4284 set thread context of 4600	4284	iexplore.exe	98

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

pid	Process
3564	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2992	09fefe8f2d0e20847f08ebd26e29741f.exe
2992	09fefe8f2d0e20847f08ebd26e29741f.exe
756	powershell.exe
2372	09fefe8f2d0e20847f08ebd26e29741f.exe
2372	09fefe8f2d0e20847f08ebd26e29741f.exe
756	powershell.exe
2372	09fefe8f2d0e20847f08ebd26e29741f.exe
2372	09fefe8f2d0e20847f08ebd26e29741f.exe
4468	iexplore.exe
4468	iexplore.exe
1364	iexplore.exe
1364	iexplore.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2992	09fefe8f2d0e20847f08ebd26e29741f.exe
Token: SeDebugPrivilege	756	powershell.exe
Token: SeDebugPrivilege	4284	iexplore.exe
Token: SeDebugPrivilege	4468	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2372	09fefe8f2d0e20847f08ebd26e29741f.exe
4284	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 756	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	88
PID 2992 wrote to memory of 756	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	88
PID 2992 wrote to memory of 756	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	88
PID 2992 wrote to memory of 3564	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	90
PID 2992 wrote to memory of 3564	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	90
PID 2992 wrote to memory of 3564	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	90
PID 2992 wrote to memory of 2372	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	92
PID 2992 wrote to memory of 2372	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	92
PID 2992 wrote to memory of 2372	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	92
PID 2992 wrote to memory of 2372	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	92
PID 2992 wrote to memory of 2372	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	92
PID 2992 wrote to memory of 2372	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	92
PID 2992 wrote to memory of 2372	2992	09fefe8f2d0e20847f08ebd26e29741f.exe	92
PID 2372 wrote to memory of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 2372 wrote to memory of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 2372 wrote to memory of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 2372 wrote to memory of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 2372 wrote to memory of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 2372 wrote to memory of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 2372 wrote to memory of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 2372 wrote to memory of 4284	2372	09fefe8f2d0e20847f08ebd26e29741f.exe	93
PID 4284 wrote to memory of 4468	4284	iexplore.exe	94
PID 4284 wrote to memory of 4468	4284	iexplore.exe	94
PID 4284 wrote to memory of 4468	4284	iexplore.exe	94
PID 4284 wrote to memory of 4468	4284	iexplore.exe	94
PID 4284 wrote to memory of 4468	4284	iexplore.exe	94
PID 4284 wrote to memory of 4468	4284	iexplore.exe	94
PID 4284 wrote to memory of 4468	4284	iexplore.exe	94
PID 4284 wrote to memory of 4468	4284	iexplore.exe	94
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 2488	4284	iexplore.exe	95
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 1364	4284	iexplore.exe	96
PID 4284 wrote to memory of 4948	4284	iexplore.exe	97
PID 4284 wrote to memory of 4948	4284	iexplore.exe	97
PID 4284 wrote to memory of 4948	4284	iexplore.exe	97
PID 4284 wrote to memory of 4948	4284	iexplore.exe	97
PID 4284 wrote to memory of 4948	4284	iexplore.exe	97
PID 4284 wrote to memory of 4948	4284	iexplore.exe	97
PID 4284 wrote to memory of 4948	4284	iexplore.exe	97
PID 4284 wrote to memory of 4948	4284	iexplore.exe	97
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98
PID 4284 wrote to memory of 4600	4284	iexplore.exe	98

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"	09fefe8f2d0e20847f08ebd26e29741f.exe

C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe
"C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\tQcdUx.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:756
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tQcdUx" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1DB9.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3564
- C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.exe
  "C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.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:2372
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\09fefe8f2d0e20847f08ebd26e29741f.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:4284
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\zpwbenssr0.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4468
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\zpwbenssr1.txt"
      4⤵
      Accesses Microsoft Outlook accounts
      PID:2488
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\zpwbenssr2.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1364
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\zpwbenssr3.txt"
      4⤵
      PID:4948
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\P0U4N118-N5L3-W331-B1K0-Y2V3O6B8B2Q6\zpwbenssr4.txt"
      4⤵
      PID:4600

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

Privilege Escalation

Bypass User Account Control

T1088

Scheduled Task

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry