dcrat | 1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\explorer.exe\", \"C:\\PerfLogs\\Admin\\wininit.exe\", \"C:\\Documents and Settings\\csrss.exe\", \"C:\\Users\\Default\\AppData\\Roaming\\Microsoft\\Internet Explorer\\Quick Launch\\taskhost.exe\", \"C:\\Windows\\System32\\wlangpui\\lsm.exe\", \"C:\\Windows\\System32\\MdRes\\dllhost.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\explorer.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\explorer.exe\", \"C:\\PerfLogs\\Admin\\wininit.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\explorer.exe\", \"C:\\PerfLogs\\Admin\\wininit.exe\", \"C:\\Documents and Settings\\csrss.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\explorer.exe\", \"C:\\PerfLogs\\Admin\\wininit.exe\", \"C:\\Documents and Settings\\csrss.exe\", \"C:\\Users\\Default\\AppData\\Roaming\\Microsoft\\Internet Explorer\\Quick Launch\\taskhost.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\explorer.exe\", \"C:\\PerfLogs\\Admin\\wininit.exe\", \"C:\\Documents and Settings\\csrss.exe\", \"C:\\Users\\Default\\AppData\\Roaming\\Microsoft\\Internet Explorer\\Quick Launch\\taskhost.exe\", \"C:\\Windows\\System32\\wlangpui\\lsm.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.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	2752	2820	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2928	2820	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2896	2820	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2768	2820	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2612	2820	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2724	2820	schtasks.exe	30

UAC bypass 3 TTPs 6 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	lsm.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	lsm.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	lsm.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe

DCRat payload 7 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2388-1-0x0000000000300000-0x00000000003F4000-memory.dmp	dcrat
behavioral1/files/0x00050000000194a7-20.dat	dcrat
behavioral1/files/0x0009000000016b17-37.dat	dcrat
behavioral1/files/0x0009000000016c89-59.dat	dcrat
behavioral1/files/0x0009000000016d46-70.dat	dcrat
behavioral1/files/0x000b000000016db3-81.dat	dcrat
behavioral1/memory/2216-105-0x00000000002F0000-0x00000000003E4000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2216	lsm.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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\PerfLogs\\Admin\\wininit.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Documents and Settings\\csrss.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Users\\Default\\AppData\\Roaming\\Microsoft\\Internet Explorer\\Quick Launch\\taskhost.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\wlangpui\\lsm.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\wlangpui\\lsm.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\explorer.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\explorer.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\PerfLogs\\Admin\\wininit.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Documents and Settings\\csrss.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Users\\Default\\AppData\\Roaming\\Microsoft\\Internet Explorer\\Quick Launch\\taskhost.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\MdRes\\dllhost.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\MdRes\\dllhost.exe\""	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe

Checks whether UAC is enabled 1 TTPs 4 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	lsm.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	lsm.exe

Drops file in System32 directory 10 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\MdRes\RCX948F.tmp	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File created	C:\Windows\System32\MdRes\5940a34987c99120d96dace90a3f93f329dcad63	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File opened for modification	C:\Windows\System32\wlangpui\RCX920D.tmp	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File created	C:\Windows\System32\MdRes\dllhost.exe	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File opened for modification	C:\Windows\System32\wlangpui\RCX927B.tmp	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File opened for modification	C:\Windows\System32\wlangpui\lsm.exe	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File opened for modification	C:\Windows\System32\MdRes\RCX948E.tmp	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File opened for modification	C:\Windows\System32\MdRes\dllhost.exe	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File created	C:\Windows\System32\wlangpui\lsm.exe	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
File created	C:\Windows\System32\wlangpui\101b941d020240259ca4912829b53995ad543df6	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe

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

System Information Discovery
T1082

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
2896	schtasks.exe
2768	schtasks.exe
2612	schtasks.exe
2724	schtasks.exe
2752	schtasks.exe
2928	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2388	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Token: SeDebugPrivilege	2216	lsm.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 1804	2388	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe	37
PID 2388 wrote to memory of 1804	2388	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe	37
PID 2388 wrote to memory of 1804	2388	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe	37
PID 1804 wrote to memory of 1516	1804	cmd.exe	39
PID 1804 wrote to memory of 1516	1804	cmd.exe	39
PID 1804 wrote to memory of 1516	1804	cmd.exe	39
PID 1804 wrote to memory of 2216	1804	cmd.exe	40
PID 1804 wrote to memory of 2216	1804	cmd.exe	40
PID 1804 wrote to memory of 2216	1804	cmd.exe	40

System policy modification 1 TTPs 6 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	lsm.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	lsm.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	lsm.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.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\1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe
"C:\Users\Admin\AppData\Local\Temp\1e1ee51c8a265b2b86b0c6aec30e8ba5c8a1ea69a2d47bbceff7813fc673ed7d.exe"
1⤵
- Modifies WinLogon for persistence
- 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:2388
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\MhoiJDNFqU.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1804
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1516
- - C:\Windows\System32\wlangpui\lsm.exe
    "C:\Windows\System32\wlangpui\lsm.exe"
    3⤵
    - UAC bypass
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Suspicious use of AdjustPrivilegeToken
    - System policy modification
    PID:2216

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0018-0409-0000-0000000FF1CE}-C\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\PerfLogs\Admin\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2928

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Documents and Settings\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2896

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2768

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\wlangpui\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\MdRes\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2724

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

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

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

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry