dcrat | 65730273fac03a90f29ce7f8d9b5275604a26b33267d1604cab394150dc7c160

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Desktop\\csrss.exe\", \"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxBlockMap\\StartMenuExperienceHost.exe\", \"C:\\Windows\\System32\\wbem\\dimsroam\\unsecapp.exe\", \"C:\\Perfmonitor\\dllhost.exe\", \"C:\\Windows\\System32\\wbem\\OfflineFilesWmiProvider_Uninstall\\unsecapp.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Desktop\\csrss.exe\", \"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxBlockMap\\StartMenuExperienceHost.exe\", \"C:\\Windows\\System32\\wbem\\dimsroam\\unsecapp.exe\", \"C:\\Perfmonitor\\dllhost.exe\", \"C:\\Windows\\System32\\wbem\\OfflineFilesWmiProvider_Uninstall\\unsecapp.exe\", \"C:\\Program Files\\Windows Mail\\SppExtComObj.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Desktop\\csrss.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Desktop\\csrss.exe\", \"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxBlockMap\\StartMenuExperienceHost.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Desktop\\csrss.exe\", \"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxBlockMap\\StartMenuExperienceHost.exe\", \"C:\\Windows\\System32\\wbem\\dimsroam\\unsecapp.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Desktop\\csrss.exe\", \"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxBlockMap\\StartMenuExperienceHost.exe\", \"C:\\Windows\\System32\\wbem\\dimsroam\\unsecapp.exe\", \"C:\\Perfmonitor\\dllhost.exe\""	Perfmonitorfontinto.exe

Process spawned unexpected child process 6 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2260	1952	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3148	1952	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2520	1952	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1688	1952	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2232	1952	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4248	1952	schtasks.exe	88

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x000b000000023baf-9.dat	dcrat
behavioral2/memory/180-13-0x0000000000BF0000-0x0000000000DFE000-memory.dmp	dcrat

Disables Task Manager via registry modification
evasion

Checks computer location settings 2 TTPs 3 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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Perfmonitorfontinto.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	JaffaCakes118_f1342761444e6e47af7046bc2db0719a.exe

Executes dropped EXE 2 IoCs

pid	Process
180	Perfmonitorfontinto.exe
3304	unsecapp.exe

Adds Run key to start application 2 TTPs 12 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\unsecapp = "\"C:\\Windows\\System32\\wbem\\OfflineFilesWmiProvider_Uninstall\\unsecapp.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\unsecapp = "\"C:\\Windows\\System32\\wbem\\OfflineFilesWmiProvider_Uninstall\\unsecapp.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\ProgramData\\Desktop\\csrss.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\ProgramData\\Desktop\\csrss.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\StartMenuExperienceHost = "\"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxBlockMap\\StartMenuExperienceHost.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Perfmonitor\\dllhost.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\Program Files\\Windows Mail\\SppExtComObj.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\Program Files\\Windows Mail\\SppExtComObj.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\StartMenuExperienceHost = "\"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxBlockMap\\StartMenuExperienceHost.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\unsecapp = "\"C:\\Windows\\System32\\wbem\\dimsroam\\unsecapp.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\unsecapp = "\"C:\\Windows\\System32\\wbem\\dimsroam\\unsecapp.exe\""	Perfmonitorfontinto.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Perfmonitor\\dllhost.exe\""	Perfmonitorfontinto.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\System32\wbem\OfflineFilesWmiProvider_Uninstall\unsecapp.exe	Perfmonitorfontinto.exe
File created	C:\Windows\System32\wbem\OfflineFilesWmiProvider_Uninstall\29c1c3cc0f76855c7e7456076a4ffc27e4947119	Perfmonitorfontinto.exe
File created	C:\Windows\System32\wbem\dimsroam\unsecapp.exe	Perfmonitorfontinto.exe
File created	C:\Windows\System32\wbem\dimsroam\29c1c3cc0f76855c7e7456076a4ffc27e4947119	Perfmonitorfontinto.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Mail\SppExtComObj.exe	Perfmonitorfontinto.exe
File created	C:\Program Files\Windows Mail\e1ef82546f0b02b7e974f28047f3788b1128cce1	Perfmonitorfontinto.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxBlockMap\StartMenuExperienceHost.exe	Perfmonitorfontinto.exe
File created	C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxBlockMap\55b276f4edf653fe07efe8f1ecc32d3d195abd16	Perfmonitorfontinto.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_f1342761444e6e47af7046bc2db0719a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	JaffaCakes118_f1342761444e6e47af7046bc2db0719a.exe
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	Perfmonitorfontinto.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

pid	Process
2692	reg.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

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

persistence execution

Scheduled Task

pid	Process
1688	schtasks.exe
2232	schtasks.exe
4248	schtasks.exe
2260	schtasks.exe
3148	schtasks.exe
2520	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
180	Perfmonitorfontinto.exe
180	Perfmonitorfontinto.exe
180	Perfmonitorfontinto.exe
180	Perfmonitorfontinto.exe
180	Perfmonitorfontinto.exe
180	Perfmonitorfontinto.exe
180	Perfmonitorfontinto.exe
180	Perfmonitorfontinto.exe
180	Perfmonitorfontinto.exe
3304	unsecapp.exe
3304	unsecapp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	180	Perfmonitorfontinto.exe
Token: SeDebugPrivilege	3304	unsecapp.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4572 wrote to memory of 4800	4572	JaffaCakes118_f1342761444e6e47af7046bc2db0719a.exe	83
PID 4572 wrote to memory of 4800	4572	JaffaCakes118_f1342761444e6e47af7046bc2db0719a.exe	83
PID 4572 wrote to memory of 4800	4572	JaffaCakes118_f1342761444e6e47af7046bc2db0719a.exe	83
PID 4800 wrote to memory of 3908	4800	WScript.exe	85
PID 4800 wrote to memory of 3908	4800	WScript.exe	85
PID 4800 wrote to memory of 3908	4800	WScript.exe	85
PID 3908 wrote to memory of 180	3908	cmd.exe	87
PID 3908 wrote to memory of 180	3908	cmd.exe	87
PID 180 wrote to memory of 556	180	Perfmonitorfontinto.exe	96
PID 180 wrote to memory of 556	180	Perfmonitorfontinto.exe	96
PID 3908 wrote to memory of 2692	3908	cmd.exe	98
PID 3908 wrote to memory of 2692	3908	cmd.exe	98
PID 3908 wrote to memory of 2692	3908	cmd.exe	98
PID 556 wrote to memory of 4648	556	cmd.exe	99
PID 556 wrote to memory of 4648	556	cmd.exe	99
PID 556 wrote to memory of 3304	556	cmd.exe	102
PID 556 wrote to memory of 3304	556	cmd.exe	102

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f1342761444e6e47af7046bc2db0719a.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f1342761444e6e47af7046bc2db0719a.exe"
1⤵
- DcRat
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4572
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Perfmonitor\lNQQOstPqxiFMmsYvmB.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4800
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Perfmonitor\O0mpFdbBjdm7srZfGtzhIPYG.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3908
  - - C:\Perfmonitor\Perfmonitorfontinto.exe
      "C:\Perfmonitor\Perfmonitorfontinto.exe"
      4⤵
      Modifies WinLogon for persistence
      Checks computer location settings
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      Drops file in Program Files directory
      Drops file in Windows directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:180
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\8yT32W8MdK.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:556
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:4648
      - C:\Windows\System32\wbem\OfflineFilesWmiProvider_Uninstall\unsecapp.exe
        
        "C:\Windows\System32\wbem\OfflineFilesWmiProvider_Uninstall\unsecapp.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3304
  - - C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
      4⤵
      System Location Discovery: System Language Discovery
      Modifies registry key
      PID:2692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\ProgramData\Desktop\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2260

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxBlockMap\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\dimsroam\unsecapp.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2520

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Perfmonitor\dllhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\OfflineFilesWmiProvider_Uninstall\unsecapp.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2232

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Modify Registry

3

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery