Analysis Overview
SHA256
1eb05c88632fe616aa7e8f9e79b8bc0981ca409daa50cda67c36b03cc703dc48
Threat Level: Known bad
The file DCRatBuild.exe was found to be: Known bad.
Malicious Activity Summary
DCRat payload
Dcrat family
Process spawned unexpected child process
DcRat
DCRat payload
Downloads MZ/PE file
Loads dropped DLL
Executes dropped EXE
Drops file in System32 directory
Drops file in Program Files directory
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Suspicious behavior: GetForegroundWindowSpam
Modifies registry class
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Uses Task Scheduler COM API
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-17 13:13
Signatures
DCRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Dcrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-17 13:13
Reported
2024-06-17 13:15
Platform
win7-20240508-en
Max time kernel
117s
Max time network
118s
Command Line
Signatures
DcRat
Process spawned unexpected child process
| Description | Indicator | Process | Target |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe |
DCRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\Windows\ShellNew\agentPerf.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\System32\sv-SE\69ddcba757bf72 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Windows\System32\sv-SE\smss.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Microsoft Office\Office14\PROOF\1033\lsm.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft Office\Office14\PROOF\1033\101b941d020240 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\c5b4cb5e9653cc | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\Windows Photo Viewer\27d1bcfc3c54e0 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\Windows Mail\36b63218b41338 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\DVD Maker\en-US\winlogon.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\Idle.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File opened for modification | C:\Program Files\DVD Maker\en-US\winlogon.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\Windows Mail\agentPerf.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\services.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\Windows Photo Viewer\System.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\DVD Maker\en-US\cc11b995f2a76d | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\6ccacd8608530f | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\Vss\Writers\System\lsm.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Windows\Vss\Writers\System\101b941d020240 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Windows\schemas\EAPHost\wininit.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Windows\Fonts\csrss.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Windows\Fonts\886983d96e3d3e | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Windows\ShellNew\agentPerf.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Windows\ShellNew\36b63218b41338 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\Windows\ShellNew\agentPerf.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\ShellNew\agentPerf.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe
"C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe"
C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\portrefsessionbrokersvc\aDaLPFxSJb1uF.vbe"
C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\portrefsessionbrokersvc\t8rS5sz1fHxoOQyb6p.bat" "
C:\portrefsessionbrokersvc\agentPerf.exe
"C:\portrefsessionbrokersvc\agentPerf.exe"
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 14 /tr "'C:\Program Files\DVD Maker\en-US\winlogon.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files\DVD Maker\en-US\winlogon.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 9 /tr "'C:\Program Files\DVD Maker\en-US\winlogon.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\Favorites\services.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\All Users\Favorites\services.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Users\All Users\Favorites\services.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\Idle.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\Idle.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\Idle.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\portrefsessionbrokersvc\lsass.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\portrefsessionbrokersvc\lsass.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\portrefsessionbrokersvc\lsass.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Windows\System32\sv-SE\smss.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\System32\sv-SE\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Windows\System32\sv-SE\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\csrss.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\csrss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\csrss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\portrefsessionbrokersvc\smss.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\portrefsessionbrokersvc\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 5 /tr "'C:\portrefsessionbrokersvc\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "agentPerfa" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Mail\agentPerf.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "agentPerf" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\agentPerf.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "agentPerfa" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Mail\agentPerf.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\services.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\services.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\services.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 13 /tr "'C:\Users\Default\Cookies\explorer.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\Default\Cookies\explorer.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 9 /tr "'C:\Users\Default\Cookies\explorer.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\cmd.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\cmd.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\cmd.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Photo Viewer\System.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\System.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Photo Viewer\System.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Windows\Fonts\csrss.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\Fonts\csrss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Windows\Fonts\csrss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\portrefsessionbrokersvc\smss.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\portrefsessionbrokersvc\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\portrefsessionbrokersvc\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "agentPerfa" /sc MINUTE /mo 6 /tr "'C:\Windows\ShellNew\agentPerf.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "agentPerf" /sc ONLOGON /tr "'C:\Windows\ShellNew\agentPerf.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "agentPerfa" /sc MINUTE /mo 8 /tr "'C:\Windows\ShellNew\agentPerf.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 11 /tr "'C:\Users\Default\taskhost.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Users\Default\taskhost.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 5 /tr "'C:\Users\Default\taskhost.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Windows\Vss\Writers\System\lsm.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\Vss\Writers\System\lsm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 10 /tr "'C:\Windows\Vss\Writers\System\lsm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Microsoft Office\Office14\PROOF\1033\lsm.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Office\Office14\PROOF\1033\lsm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft Office\Office14\PROOF\1033\lsm.exe'" /rl HIGHEST /f
C:\Windows\ShellNew\agentPerf.exe
"C:\Windows\ShellNew\agentPerf.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | a0996848.xsph.ru | udp |
| US | 8.8.8.8:53 | a0996848.xsph.ru | udp |
Files
C:\portrefsessionbrokersvc\aDaLPFxSJb1uF.vbe
| MD5 | fe31f73134b8b2ed43b54fe28ee259d5 |
| SHA1 | eae69f3e9936e067fcbde218f2174d231d86c9db |
| SHA256 | 6d8d73a0d3d53a245567873087e36439e8ec12378525d82719a43937bcf92b60 |
| SHA512 | b009fe93e589ac5b9a8f1f3a9134a302743ad5a32976c4546248bd9d2fa1b785f7a5c17319d5983aadea9243ece1849ae3c9e5557019c11e0e3738ae4b865b95 |
C:\portrefsessionbrokersvc\t8rS5sz1fHxoOQyb6p.bat
| MD5 | 99fbe443256d9a8fd914d76dc87761ad |
| SHA1 | 6d8977a55b1fc4f6e03f2061e72922ebaaefadbd |
| SHA256 | c1c3dad90d1d94935cae12ecd269da8eeeaf170919c0c6b9cb45dd65a4ce6727 |
| SHA512 | 911672cda774e28a40692b8ea896dbeb5613d3b753b115e4845d6b551c5a1df03fab6f5cc242751b8606169818606dec40ed1fbf98167459a4ccc857e45e3f68 |
\portrefsessionbrokersvc\agentPerf.exe
| MD5 | d4be7038cfa3b307b3e4b7d1d6fd1aee |
| SHA1 | b9908d1e38c3b0d7110c409d071abb2778c6afb0 |
| SHA256 | d7510f6e245c8b252ea75764c230d98df2fb934ed98ee41d687f1e2434b5233e |
| SHA512 | a7e3f4abc6553427904be07399db1e6389055e990be52148547ea6efe852e29fa207182ae1743fe258a794dc0e6c6e18fd7b057ec672dbed9c885b1465d8fc7f |
memory/2736-13-0x00000000010E0000-0x00000000011B6000-memory.dmp
memory/2140-56-0x00000000000A0000-0x0000000000176000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-17 13:13
Reported
2024-06-17 13:15
Platform
win10-20240404-en
Max time kernel
140s
Max time network
151s
Command Line
Signatures
DcRat
Process spawned unexpected child process
| Description | Indicator | Process | Target |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe |
DCRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Downloads MZ/PE file
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| N/A | N/A | C:\Recovery\WindowsRE\smss.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\WindowsPowerShell\Modules\conhost.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files (x86)\WindowsPowerShell\Modules\088424020bedd6 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft.NET\RedistList\5940a34987c991 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\7-Zip\sysmon.exe | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| File created | C:\Program Files\7-Zip\121e5b5079f7c0 | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-873560699-1074803302-2326074425-1000_Classes\Local Settings | C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-873560699-1074803302-2326074425-1000_Classes\Local Settings | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Recovery\WindowsRE\smss.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\portrefsessionbrokersvc\agentPerf.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Recovery\WindowsRE\smss.exe | N/A |
| Token: 33 | N/A | C:\Windows\system32\AUDIODG.EXE | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\system32\AUDIODG.EXE | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe
"C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe"
C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\portrefsessionbrokersvc\aDaLPFxSJb1uF.vbe"
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\portrefsessionbrokersvc\t8rS5sz1fHxoOQyb6p.bat" "
C:\portrefsessionbrokersvc\agentPerf.exe
"C:\portrefsessionbrokersvc\agentPerf.exe"
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 8 /tr "'C:\portrefsessionbrokersvc\taskhostw.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\portrefsessionbrokersvc\taskhostw.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 12 /tr "'C:\portrefsessionbrokersvc\taskhostw.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgentI" /sc MINUTE /mo 14 /tr "'C:\Users\Public\Desktop\InstallAgent.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgent" /sc ONLOGON /tr "'C:\Users\Public\Desktop\InstallAgent.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgentI" /sc MINUTE /mo 13 /tr "'C:\Users\Public\Desktop\InstallAgent.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 9 /tr "'C:\Program Files\7-Zip\sysmon.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files\7-Zip\sysmon.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 13 /tr "'C:\Program Files\7-Zip\sysmon.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\Application Data\sysmon.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Users\All Users\Application Data\sysmon.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\Application Data\sysmon.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\WindowsPowerShell\Modules\conhost.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Modules\conhost.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\WindowsPowerShell\Modules\conhost.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe'" /rl HIGHEST /f
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\dPikWfjrrw.bat"
C:\Windows\system32\w32tm.exe
w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
C:\Recovery\WindowsRE\smss.exe
"C:\Recovery\WindowsRE\smss.exe"
C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x3f4
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | a0996848.xsph.ru | udp |
| RU | 141.8.192.103:80 | a0996848.xsph.ru | tcp |
| RU | 141.8.192.103:80 | a0996848.xsph.ru | tcp |
| US | 8.8.8.8:53 | 103.192.8.141.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
| RU | 141.8.192.103:80 | a0996848.xsph.ru | tcp |
| RU | 141.8.192.103:80 | a0996848.xsph.ru | tcp |
| US | 8.8.8.8:53 | 91.65.42.20.in-addr.arpa | udp |
| RU | 141.8.192.103:80 | a0996848.xsph.ru | tcp |
Files
C:\portrefsessionbrokersvc\aDaLPFxSJb1uF.vbe
| MD5 | fe31f73134b8b2ed43b54fe28ee259d5 |
| SHA1 | eae69f3e9936e067fcbde218f2174d231d86c9db |
| SHA256 | 6d8d73a0d3d53a245567873087e36439e8ec12378525d82719a43937bcf92b60 |
| SHA512 | b009fe93e589ac5b9a8f1f3a9134a302743ad5a32976c4546248bd9d2fa1b785f7a5c17319d5983aadea9243ece1849ae3c9e5557019c11e0e3738ae4b865b95 |
C:\portrefsessionbrokersvc\t8rS5sz1fHxoOQyb6p.bat
| MD5 | 99fbe443256d9a8fd914d76dc87761ad |
| SHA1 | 6d8977a55b1fc4f6e03f2061e72922ebaaefadbd |
| SHA256 | c1c3dad90d1d94935cae12ecd269da8eeeaf170919c0c6b9cb45dd65a4ce6727 |
| SHA512 | 911672cda774e28a40692b8ea896dbeb5613d3b753b115e4845d6b551c5a1df03fab6f5cc242751b8606169818606dec40ed1fbf98167459a4ccc857e45e3f68 |
C:\portrefsessionbrokersvc\agentPerf.exe
| MD5 | d4be7038cfa3b307b3e4b7d1d6fd1aee |
| SHA1 | b9908d1e38c3b0d7110c409d071abb2778c6afb0 |
| SHA256 | d7510f6e245c8b252ea75764c230d98df2fb934ed98ee41d687f1e2434b5233e |
| SHA512 | a7e3f4abc6553427904be07399db1e6389055e990be52148547ea6efe852e29fa207182ae1743fe258a794dc0e6c6e18fd7b057ec672dbed9c885b1465d8fc7f |
memory/3780-14-0x0000000000CA0000-0x0000000000D76000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\dPikWfjrrw.bat
| MD5 | d2fdf82fc433fdfc2be1922ff69e1bc4 |
| SHA1 | 507f02e50f3c4e9f8c9d25fd294375bd71cc2116 |
| SHA256 | 661ddbb85d6510e0a294ff4263af5b9828d775bdd30812d1ed6c3aad462bf242 |
| SHA512 | 09590f41097f7f06a176a5ac3b5c5a550c0778ffc3a6333d990ce405976b4710ac8297ca57b1c88a72d4cae785791bb8fff7e7fdf2c880c2a56926393d1f1043 |
memory/1232-40-0x0000000001800000-0x0000000001824000-memory.dmp
memory/1232-41-0x0000000001940000-0x00000000019EA000-memory.dmp