dcrat | aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\System32\\cmstplua\\spoolsv.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\System32\\cmstplua\\spoolsv.exe\", \"C:\\Windows\\System32\\msmmsp\\taskhost.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\System32\\cmstplua\\spoolsv.exe\", \"C:\\Windows\\System32\\msmmsp\\taskhost.exe\", \"C:\\Windows\\System32\\iepeers\\sppsvc.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe

Process spawned unexpected child process 3 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	2228	1792	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1632	1792	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2796	1792	schtasks.exe	30

Executes dropped EXE 1 IoCs

pid	Process
2620	taskhost.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\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Windows\\System32\\iepeers\\sppsvc.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Windows\\System32\\iepeers\\sppsvc.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\cmstplua\\spoolsv.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\cmstplua\\spoolsv.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Windows\\System32\\msmmsp\\taskhost.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Windows\\System32\\msmmsp\\taskhost.exe\""	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\cmstplua\spoolsv.exe	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
File created	C:\Windows\System32\cmstplua\f3b6ecef712a24f33798f5d2fb3790c3d9b894c4	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
File created	C:\Windows\System32\msmmsp\taskhost.exe	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
File created	C:\Windows\System32\msmmsp\b75386f1303e64d8139363b71e44ac16341adf4e	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
File created	C:\Windows\System32\iepeers\sppsvc.exe	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
File created	C:\Windows\System32\iepeers\0a1fd5f707cd16ea89afd3d6db52b2da58214a6c	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
File created	C:\Windows\System32\cmstplua\spoolsv.exe	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe

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	taskhost.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	taskhost.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

persistence execution

Scheduled Task

pid	Process
2228	schtasks.exe
1632	schtasks.exe
2796	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
2620	taskhost.exe
2620	taskhost.exe
2620	taskhost.exe
2620	taskhost.exe
2620	taskhost.exe
2620	taskhost.exe
2620	taskhost.exe
2620	taskhost.exe
2620	taskhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
Token: SeDebugPrivilege	2620	taskhost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 3056	2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe	34
PID 2412 wrote to memory of 3056	2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe	34
PID 2412 wrote to memory of 3056	2412	aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe	34
PID 3056 wrote to memory of 2864	3056	cmd.exe	36
PID 3056 wrote to memory of 2864	3056	cmd.exe	36
PID 3056 wrote to memory of 2864	3056	cmd.exe	36
PID 3056 wrote to memory of 2620	3056	cmd.exe	38
PID 3056 wrote to memory of 2620	3056	cmd.exe	38
PID 3056 wrote to memory of 2620	3056	cmd.exe	38

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\aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe
"C:\Users\Admin\AppData\Local\Temp\aa7a05956ca47e164a10a94d0bdbe01123b84eb01fad5e581e1e72b10d93d5a9.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\oD6dgbayc4.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3056
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2864
- - C:\Windows\System32\msmmsp\taskhost.exe
    "C:\Windows\System32\msmmsp\taskhost.exe"
    3⤵
    - Executes dropped EXE
    - Modifies system certificate store
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\cmstplua\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2228

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\System32\msmmsp\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1632

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\iepeers\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

2

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

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Modify Registry

3

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Discovery

Query Registry