remcos | 9b5ef79976dbfedbc2c85f57a905bdc408956be8e51cb04a76a4e5d353b575a2

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"	Iserver.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"	Iserver.exe

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

NirSoft MailPassView 6 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2384-59-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2384-65-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2204-98-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2384-104-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2204-106-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2384-107-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 6 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2732-62-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2732-100-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2980-122-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2732-127-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2980-129-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1296-141-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 15 IoCs

resource	yara_rule
behavioral1/memory/2384-59-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2384-65-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2628-63-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2628-68-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2732-62-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2204-98-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2732-100-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2836-105-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2384-104-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2204-106-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2384-107-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2980-122-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2732-127-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2980-129-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1296-141-0x0000000000400000-0x0000000000478000-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
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\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2 = "C:\\Users\\Admin\\AppData\\Roaming\\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2.exe"	iexplore.exe

Executes dropped EXE 1 IoCs

pid	Process
1160	Iserver.exe

Loads dropped DLL 4 IoCs

pid	Process
2800	Caspol.exe
1160	Iserver.exe
1160	Iserver.exe
1160	Iserver.exe

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"	Iserver.exe

Accesses Microsoft Outlook accounts 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	iexplore.exe
Key opened	\REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Caspol.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-1-5-21-2084844033-2744876406-2053742436-1000\Software\Microsoft\Windows\CurrentVersion\Run\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2 = "C:\\Users\\Admin\\AppData\\Roaming\\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2.exe"	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2 = "C:\\Users\\Admin\\AppData\\Roaming\\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2.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"	Iserver.exe

Suspicious use of SetThreadContext 18 IoCs

description	pid	Process	procid_target
PID 2580 set thread context of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2800 set thread context of 2732	2800	Caspol.exe	29
PID 2800 set thread context of 2384	2800	Caspol.exe	30
PID 2800 set thread context of 2628	2800	Caspol.exe	31
PID 1160 set thread context of 3068	1160	Iserver.exe	33
PID 1160 set thread context of 2936	1160	Iserver.exe	35
PID 2800 set thread context of 1296	2800	Caspol.exe	36
PID 2800 set thread context of 2204	2800	Caspol.exe	37
PID 2800 set thread context of 2836	2800	Caspol.exe	38
PID 1160 set thread context of 2192	1160	Iserver.exe	40
PID 1160 set thread context of 3004	1160	Iserver.exe	41
PID 2800 set thread context of 2980	2800	Caspol.exe	43
PID 2800 set thread context of 896	2800	Caspol.exe	44
PID 3004 set thread context of 2084	3004	iexplore.exe	47
PID 3004 set thread context of 1084	3004	iexplore.exe	48
PID 3004 set thread context of 2064	3004	iexplore.exe	49
PID 3004 set thread context of 1964	3004	iexplore.exe	50
PID 3004 set thread context of 704	3004	iexplore.exe	51

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
2732	Caspol.exe
1160	Iserver.exe
1160	Iserver.exe
1160	Iserver.exe
1160	Iserver.exe
1160	Iserver.exe
1160	Iserver.exe
1296	Caspol.exe
1160	Iserver.exe
1160	Iserver.exe
2980	Caspol.exe
2732	Caspol.exe
2980	Caspol.exe
1160	Iserver.exe
1160	Iserver.exe
1296	Caspol.exe
2064	iexplore.exe

Suspicious behavior: MapViewOfSection 10 IoCs

pid	Process
2800	Caspol.exe
2800	Caspol.exe
2800	Caspol.exe
2800	Caspol.exe
2800	Caspol.exe
2800	Caspol.exe
2800	Caspol.exe
2800	Caspol.exe
2800	Caspol.exe
2800	Caspol.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2628	Caspol.exe
Token: SeDebugPrivilege	2836	Caspol.exe
Token: SeDebugPrivilege	3004	iexplore.exe
Token: SeDebugPrivilege	2084	iexplore.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2800	Caspol.exe
1160	Iserver.exe
3004	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2580 wrote to memory of 2800	2580	NEAS.00023eb2bebba3dfe0bf9497a742b890.exe	27
PID 2800 wrote to memory of 2732	2800	Caspol.exe	29
PID 2800 wrote to memory of 2732	2800	Caspol.exe	29
PID 2800 wrote to memory of 2732	2800	Caspol.exe	29
PID 2800 wrote to memory of 2732	2800	Caspol.exe	29
PID 2800 wrote to memory of 2732	2800	Caspol.exe	29
PID 2800 wrote to memory of 2384	2800	Caspol.exe	30
PID 2800 wrote to memory of 2384	2800	Caspol.exe	30
PID 2800 wrote to memory of 2384	2800	Caspol.exe	30
PID 2800 wrote to memory of 2384	2800	Caspol.exe	30
PID 2800 wrote to memory of 2384	2800	Caspol.exe	30
PID 2800 wrote to memory of 2628	2800	Caspol.exe	31
PID 2800 wrote to memory of 2628	2800	Caspol.exe	31
PID 2800 wrote to memory of 2628	2800	Caspol.exe	31
PID 2800 wrote to memory of 2628	2800	Caspol.exe	31
PID 2800 wrote to memory of 2628	2800	Caspol.exe	31
PID 2800 wrote to memory of 1160	2800	Caspol.exe	32
PID 2800 wrote to memory of 1160	2800	Caspol.exe	32
PID 2800 wrote to memory of 1160	2800	Caspol.exe	32
PID 2800 wrote to memory of 1160	2800	Caspol.exe	32
PID 2800 wrote to memory of 1160	2800	Caspol.exe	32
PID 2800 wrote to memory of 1160	2800	Caspol.exe	32
PID 2800 wrote to memory of 1160	2800	Caspol.exe	32
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 3068	1160	Iserver.exe	33
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 1160 wrote to memory of 2936	1160	Iserver.exe	35
PID 2800 wrote to memory of 1296	2800	Caspol.exe	36
PID 2800 wrote to memory of 1296	2800	Caspol.exe	36
PID 2800 wrote to memory of 1296	2800	Caspol.exe	36
PID 2800 wrote to memory of 1296	2800	Caspol.exe	36
PID 2800 wrote to memory of 1296	2800	Caspol.exe	36

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"	Iserver.exe

C:\Users\Admin\AppData\Local\Temp\NEAS.00023eb2bebba3dfe0bf9497a742b890.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.00023eb2bebba3dfe0bf9497a742b890.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2580
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2800
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\fxyhaxemsvxagfoejah"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2732
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\pzeabqxogdpfjtkitltopc"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2384
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\surkuiihclhktzymkwgishxfyt"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2628
- - C:\Users\Admin\AppData\Local\Temp\Iserver.exe
    "C:\Users\Admin\AppData\Local\Temp\Iserver.exe"
    3⤵
    - UAC bypass
    - Windows security bypass
    - Executes dropped EXE
    - Loads dropped DLL
    - 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:1160
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      C:\Users\Admin\AppData\Local\Temp\Iserver.exe
      4⤵
      PID:3068
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      C:\Users\Admin\AppData\Local\Temp\Iserver.exe
      4⤵
      PID:2936
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      C:\Users\Admin\AppData\Local\Temp\Iserver.exe
      4⤵
      PID:2192
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      C:\Users\Admin\AppData\Local\Temp\Iserver.exe
      4⤵
      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
      PID:3004
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\qtbohfghp0.txt"
        5⤵
        Suspicious use of AdjustPrivilegeToken
        
        PID:2084
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\qtbohfghp1.txt"
        5⤵
        Accesses Microsoft Outlook accounts
        
        PID:1084
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\qtbohfghp2.txt"
        5⤵
        Suspicious behavior: EnumeratesProcesses
        
        PID:2064
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\qtbohfghp3.txt"
        5⤵
        
        PID:1964
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\qtbohfghp4.txt"
        5⤵
        
        PID:704
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\xdkuzzfudqeihhrwu"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1296
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\hfynssporywvsnnievbwe"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2204
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\jzdfskapfgoaubbmvgoyhnlv"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2836
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\jzdfskapfgoaubbmvgoyhnlv"
    3⤵
    PID:2188
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\eozxxrvbtcstg"
    3⤵
    PID:2992
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\eozxxrvbtcstg"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2980
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\oieixjfvplkyqicv"
    3⤵
    PID:896

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