dcrat | 27907524a6f24a23303903dd2f8a230cc020401ec15e0f9579dd2c11a5c92a3a

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	7e8d92bf51d41fd9244051c68f98c660N.exe

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/1856-1-0x00000000002B0000-0x000000000037A000-memory.dmp	dcrat
behavioral1/files/0x0005000000018fe2-33.dat	dcrat
behavioral1/memory/2872-91-0x0000000000050000-0x000000000011A000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2872	services.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\icmp\\lsm.exe\""	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\7e8d92bf51d41fd9244051c68f98c660N = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\fe92c7d8-4e7e-44fa-bb2f-e13c2335c311\\7e8d92bf51d41fd9244051c68f98c660N.exe\""	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Windows\\System32\\adsmsext\\services.exe\""	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\System32\\RpcRtRemote\\csrss.exe\""	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\ProgramData\\Favorites\\spoolsv.exe\""	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\WSDMon\\lsm.exe\""	7e8d92bf51d41fd9244051c68f98c660N.exe

Checks whether UAC is enabled 1 TTPs 4 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	7e8d92bf51d41fd9244051c68f98c660N.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	services.exe

Drops file in System32 directory 16 IoCs

description	ioc	Process
File created	C:\Windows\System32\adsmsext\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	7e8d92bf51d41fd9244051c68f98c660N.exe
File created	C:\Windows\System32\RpcRtRemote\886983d96e3d3e31032c679b2d4ea91b6c05afef	7e8d92bf51d41fd9244051c68f98c660N.exe
File opened for modification	C:\Windows\System32\adsmsext\services.exe	7e8d92bf51d41fd9244051c68f98c660N.exe
File opened for modification	C:\Windows\System32\WSDMon\lsm.exe	7e8d92bf51d41fd9244051c68f98c660N.exe
File created	C:\Windows\System32\icmp\lsm.exe	7e8d92bf51d41fd9244051c68f98c660N.exe
File opened for modification	C:\Windows\System32\adsmsext\RCXECA3.tmp	7e8d92bf51d41fd9244051c68f98c660N.exe
File opened for modification	C:\Windows\System32\WSDMon\RCXF34A.tmp	7e8d92bf51d41fd9244051c68f98c660N.exe
File created	C:\Windows\System32\adsmsext\services.exe	7e8d92bf51d41fd9244051c68f98c660N.exe
File created	C:\Windows\System32\WSDMon\101b941d020240259ca4912829b53995ad543df6	7e8d92bf51d41fd9244051c68f98c660N.exe
File opened for modification	C:\Windows\System32\icmp\RCXE87C.tmp	7e8d92bf51d41fd9244051c68f98c660N.exe
File opened for modification	C:\Windows\System32\RpcRtRemote\csrss.exe	7e8d92bf51d41fd9244051c68f98c660N.exe
File opened for modification	C:\Windows\System32\icmp\lsm.exe	7e8d92bf51d41fd9244051c68f98c660N.exe
File created	C:\Windows\System32\icmp\101b941d020240259ca4912829b53995ad543df6	7e8d92bf51d41fd9244051c68f98c660N.exe
File created	C:\Windows\System32\RpcRtRemote\csrss.exe	7e8d92bf51d41fd9244051c68f98c660N.exe
File created	C:\Windows\System32\WSDMon\lsm.exe	7e8d92bf51d41fd9244051c68f98c660N.exe
File opened for modification	C:\Windows\System32\RpcRtRemote\RCXEEB6.tmp	7e8d92bf51d41fd9244051c68f98c660N.exe

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

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	services.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	services.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
2676	schtasks.exe
2824	schtasks.exe
2836	schtasks.exe
2716	schtasks.exe
2580	schtasks.exe
3052	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
1856	7e8d92bf51d41fd9244051c68f98c660N.exe
2872	services.exe
2872	services.exe
2872	services.exe
2872	services.exe
2872	services.exe
2872	services.exe
2872	services.exe
2872	services.exe
2872	services.exe
2872	services.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1856	7e8d92bf51d41fd9244051c68f98c660N.exe
Token: SeDebugPrivilege	2872	services.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1856 wrote to memory of 1908	1856	7e8d92bf51d41fd9244051c68f98c660N.exe	38
PID 1856 wrote to memory of 1908	1856	7e8d92bf51d41fd9244051c68f98c660N.exe	38
PID 1856 wrote to memory of 1908	1856	7e8d92bf51d41fd9244051c68f98c660N.exe	38
PID 1908 wrote to memory of 1896	1908	cmd.exe	40
PID 1908 wrote to memory of 1896	1908	cmd.exe	40
PID 1908 wrote to memory of 1896	1908	cmd.exe	40
PID 1908 wrote to memory of 2872	1908	cmd.exe	41
PID 1908 wrote to memory of 2872	1908	cmd.exe	41
PID 1908 wrote to memory of 2872	1908	cmd.exe	41

System policy modification 1 TTPs 6 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	7e8d92bf51d41fd9244051c68f98c660N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	services.exe

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\7e8d92bf51d41fd9244051c68f98c660N.exe
"C:\Users\Admin\AppData\Local\Temp\7e8d92bf51d41fd9244051c68f98c660N.exe"
1⤵
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1856
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\IbX6XeCNoO.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1908
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1896
- - C:\Windows\System32\adsmsext\services.exe
    "C:\Windows\System32\adsmsext\services.exe"
    3⤵
    - UAC bypass
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Modifies system certificate store
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - System policy modification
    PID:2872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\icmp\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "7e8d92bf51d41fd9244051c68f98c660N" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\fe92c7d8-4e7e-44fa-bb2f-e13c2335c311\7e8d92bf51d41fd9244051c68f98c660N.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\adsmsext\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2836

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\RpcRtRemote\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2716

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\ProgramData\Favorites\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\WSDMon\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3052

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

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Discovery

Query Registry