dcrat | 27beae1aeb07d9aa24f6f4f13d247c7f69d8c412ed9150ac0e13c36de80d159a

Analysis

max time kernel
134s
max time network
145s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/03/2025, 17:28

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General

Target

DCRatBuild.exe
Size

2.1MB
MD5

fa7058193e55dcf22576be1d81ee4ec9
SHA1

7ac5c2aeff7da77ea0ea71e9e4244dec68ee7a18
SHA256

27beae1aeb07d9aa24f6f4f13d247c7f69d8c412ed9150ac0e13c36de80d159a
SHA512

fbb538fa4d26bd3c554f9e837b134c119a6acff43b0a8cc0b805bcb9a0acfa54d4b0ca18d745f7f167ba9bc9642d8e14e783c38ad7207d55389d8ea7dd1af74e
SSDEEP

49152:IBJnuqJN5zhadFAfdQhkGdf8v0d4RHP5Hx7:yxuqVMdFPCgfydRHBHx

Score

10^/10

dcrat discovery execution infostealer persistence rat spyware stealer

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
Dcrat family
dcrat

Modifies WinLogon for persistence 2 TTPs 6 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\All Users\\lsm.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\All Users\\lsm.exe\", \"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\lsass.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\All Users\\lsm.exe\", \"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\lsass.exe\", \"C:\\Windows\\PCHEALTH\\ERRORREP\\QSIGNOFF\\taskhost.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\All Users\\lsm.exe\", \"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\lsass.exe\", \"C:\\Windows\\PCHEALTH\\ERRORREP\\QSIGNOFF\\taskhost.exe\", \"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\csrss.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\All Users\\lsm.exe\", \"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\lsass.exe\", \"C:\\Windows\\PCHEALTH\\ERRORREP\\QSIGNOFF\\taskhost.exe\", \"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\csrss.exe\", \"C:\\MSOCache\\All Users\\{90140000-00A1-0409-0000-0000000FF1CE}-C\\taskhost.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\All Users\\lsm.exe\", \"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\lsass.exe\", \"C:\\Windows\\PCHEALTH\\ERRORREP\\QSIGNOFF\\taskhost.exe\", \"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\csrss.exe\", \"C:\\MSOCache\\All Users\\{90140000-00A1-0409-0000-0000000FF1CE}-C\\taskhost.exe\", \"C:\\msWebfontCommonsvc\\ContainerAgentBrowserSession.exe\""	ContainerAgentBrowserSession.exe

Process spawned unexpected child process 18 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	2720	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2620	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1140	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	532	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2040	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1544	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2396	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1064	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3008	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2992	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	680	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	880	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	620	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1536	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2000	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	856	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2252	2344	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2140	2344	schtasks.exe	34

Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2320	powershell.exe
2392	powershell.exe
988	powershell.exe
2412	powershell.exe
2520	powershell.exe
2424	powershell.exe

Executes dropped EXE 3 IoCs

pid	Process
2736	ContainerAgentBrowserSession.exe
2024	lsm.exe
1368	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
2284	cmd.exe
2284	cmd.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 12 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\csrss.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\MSOCache\\All Users\\{90140000-00A1-0409-0000-0000000FF1CE}-C\\taskhost.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\MSOCache\\All Users\\{90140000-00A1-0409-0000-0000000FF1CE}-C\\taskhost.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ContainerAgentBrowserSession = "\"C:\\msWebfontCommonsvc\\ContainerAgentBrowserSession.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Users\\All Users\\lsm.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Windows\\PCHEALTH\\ERRORREP\\QSIGNOFF\\taskhost.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\csrss.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\ContainerAgentBrowserSession = "\"C:\\msWebfontCommonsvc\\ContainerAgentBrowserSession.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Users\\All Users\\lsm.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\lsass.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\lsass.exe\""	ContainerAgentBrowserSession.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Windows\\PCHEALTH\\ERRORREP\\QSIGNOFF\\taskhost.exe\""	ContainerAgentBrowserSession.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	\??\c:\Windows\System32\CSCB752D710AF474CE3AF231083DA90C39E.TMP	csc.exe
File created	\??\c:\Windows\System32\foda5r.exe	csc.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\servicing\ja-JP\csrss.exe	ContainerAgentBrowserSession.exe
File created	C:\Windows\PCHEALTH\ERRORREP\QSIGNOFF\taskhost.exe	ContainerAgentBrowserSession.exe
File created	C:\Windows\PCHEALTH\ERRORREP\QSIGNOFF\b75386f1303e64	ContainerAgentBrowserSession.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 3 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	DCRatBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2632	PING.EXE

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000_Classes\Local Settings	explorer.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2632	PING.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
856	schtasks.exe
2140	schtasks.exe
532	schtasks.exe
620	schtasks.exe
1064	schtasks.exe
680	schtasks.exe
2720	schtasks.exe
2620	schtasks.exe
1140	schtasks.exe
2992	schtasks.exe
880	schtasks.exe
2252	schtasks.exe
2040	schtasks.exe
1544	schtasks.exe
2396	schtasks.exe
3008	schtasks.exe
1536	schtasks.exe
2000	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe
2736	ContainerAgentBrowserSession.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2940	explorer.exe

Suspicious use of AdjustPrivilegeToken 21 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	ContainerAgentBrowserSession.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeDebugPrivilege	2024	lsm.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeDebugPrivilege	988	powershell.exe
Token: SeDebugPrivilege	2320	powershell.exe
Token: SeDebugPrivilege	2412	powershell.exe
Token: SeDebugPrivilege	2392	powershell.exe
Token: SeDebugPrivilege	2424	powershell.exe
Token: SeDebugPrivilege	2520	powershell.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeShutdownPrivilege	2940	explorer.exe
Token: SeDebugPrivilege	1368	csrss.exe

Suspicious use of FindShellTrayWindow 27 IoCs

pid	Process
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe

Suspicious use of SendNotifyMessage 18 IoCs

pid	Process
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe
2940	explorer.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 1860 wrote to memory of 3028	1860	DCRatBuild.exe	30
PID 1860 wrote to memory of 3028	1860	DCRatBuild.exe	30
PID 1860 wrote to memory of 3028	1860	DCRatBuild.exe	30
PID 1860 wrote to memory of 3028	1860	DCRatBuild.exe	30
PID 3028 wrote to memory of 2284	3028	WScript.exe	31
PID 3028 wrote to memory of 2284	3028	WScript.exe	31
PID 3028 wrote to memory of 2284	3028	WScript.exe	31
PID 3028 wrote to memory of 2284	3028	WScript.exe	31
PID 2284 wrote to memory of 2736	2284	cmd.exe	33
PID 2284 wrote to memory of 2736	2284	cmd.exe	33
PID 2284 wrote to memory of 2736	2284	cmd.exe	33
PID 2284 wrote to memory of 2736	2284	cmd.exe	33
PID 2736 wrote to memory of 2900	2736	ContainerAgentBrowserSession.exe	38
PID 2736 wrote to memory of 2900	2736	ContainerAgentBrowserSession.exe	38
PID 2736 wrote to memory of 2900	2736	ContainerAgentBrowserSession.exe	38
PID 2900 wrote to memory of 1972	2900	csc.exe	40
PID 2900 wrote to memory of 1972	2900	csc.exe	40
PID 2900 wrote to memory of 1972	2900	csc.exe	40
PID 2736 wrote to memory of 2392	2736	ContainerAgentBrowserSession.exe	59
PID 2736 wrote to memory of 2392	2736	ContainerAgentBrowserSession.exe	59
PID 2736 wrote to memory of 2392	2736	ContainerAgentBrowserSession.exe	59
PID 2736 wrote to memory of 2320	2736	ContainerAgentBrowserSession.exe	60
PID 2736 wrote to memory of 2320	2736	ContainerAgentBrowserSession.exe	60
PID 2736 wrote to memory of 2320	2736	ContainerAgentBrowserSession.exe	60
PID 2736 wrote to memory of 2424	2736	ContainerAgentBrowserSession.exe	61
PID 2736 wrote to memory of 2424	2736	ContainerAgentBrowserSession.exe	61
PID 2736 wrote to memory of 2424	2736	ContainerAgentBrowserSession.exe	61
PID 2736 wrote to memory of 2520	2736	ContainerAgentBrowserSession.exe	62
PID 2736 wrote to memory of 2520	2736	ContainerAgentBrowserSession.exe	62
PID 2736 wrote to memory of 2520	2736	ContainerAgentBrowserSession.exe	62
PID 2736 wrote to memory of 2412	2736	ContainerAgentBrowserSession.exe	63
PID 2736 wrote to memory of 2412	2736	ContainerAgentBrowserSession.exe	63
PID 2736 wrote to memory of 2412	2736	ContainerAgentBrowserSession.exe	63
PID 2736 wrote to memory of 988	2736	ContainerAgentBrowserSession.exe	64
PID 2736 wrote to memory of 988	2736	ContainerAgentBrowserSession.exe	64
PID 2736 wrote to memory of 988	2736	ContainerAgentBrowserSession.exe	64
PID 2736 wrote to memory of 888	2736	ContainerAgentBrowserSession.exe	71
PID 2736 wrote to memory of 888	2736	ContainerAgentBrowserSession.exe	71
PID 2736 wrote to memory of 888	2736	ContainerAgentBrowserSession.exe	71
PID 888 wrote to memory of 1028	888	cmd.exe	73
PID 888 wrote to memory of 1028	888	cmd.exe	73
PID 888 wrote to memory of 1028	888	cmd.exe	73
PID 888 wrote to memory of 2632	888	cmd.exe	74
PID 888 wrote to memory of 2632	888	cmd.exe	74
PID 888 wrote to memory of 2632	888	cmd.exe	74
PID 888 wrote to memory of 1368	888	cmd.exe	76
PID 888 wrote to memory of 1368	888	cmd.exe	76
PID 888 wrote to memory of 1368	888	cmd.exe	76

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\DCRatBuild.exe
"C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1860
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\msWebfontCommonsvc\1Pqb55993gaAnMOQKOP1Zx4Ywr074Tyvs.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3028
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\msWebfontCommonsvc\xOY2DcV2ToDeh.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2284
  - - C:\msWebfontCommonsvc\ContainerAgentBrowserSession.exe
      "C:\msWebfontCommonsvc/ContainerAgentBrowserSession.exe"
      4⤵
      Modifies WinLogon for persistence
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2736
    - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
        
        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\pj2xgpry\pj2xgpry.cmdline"
        5⤵
        Drops file in System32 directory
        Suspicious use of WriteProcessMemory
        
        PID:2900
      - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESADEB.tmp" "c:\Windows\System32\CSCB752D710AF474CE3AF231083DA90C39E.TMP"
        6⤵
        
        PID:1972
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\lsm.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:2392
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\lsass.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:2320
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\PCHEALTH\ERRORREP\QSIGNOFF\taskhost.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:2424
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:2520
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\taskhost.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:2412
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\msWebfontCommonsvc\ContainerAgentBrowserSession.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:988
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\4Chxk91FFt.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:888
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:1028
      - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        6⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:2632
      - C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe
        
        "C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1368

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Users\All Users\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Users\All Users\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Users\All Users\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1140

C:\Windows\explorer.exe
explorer.exe
1⤵
- Boot or Logon Autostart Execution: Active Setup
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2940

C:\Users\All Users\lsm.exe
"C:\Users\All Users\lsm.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1544

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\Windows\PCHEALTH\ERRORREP\QSIGNOFF\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2396

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\PCHEALTH\ERRORREP\QSIGNOFF\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 11 /tr "'C:\Windows\PCHEALTH\ERRORREP\QSIGNOFF\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3008

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2992

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1536

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "ContainerAgentBrowserSessionC" /sc MINUTE /mo 6 /tr "'C:\msWebfontCommonsvc\ContainerAgentBrowserSession.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "ContainerAgentBrowserSession" /sc ONLOGON /tr "'C:\msWebfontCommonsvc\ContainerAgentBrowserSession.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2252

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "ContainerAgentBrowserSessionC" /sc MINUTE /mo 5 /tr "'C:\msWebfontCommonsvc\ContainerAgentBrowserSession.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2140

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\4Chxk91FFt.bat

Filesize
186B

MD5
63ced298ec2088d93c1053628f472f2b

SHA1
437798ca9488c003f15be00e8f21495eecd8bfb3

SHA256
b05edbd37289db1ad28291d4771911ec7bcc4bb0057cfaea624d613e54d02dc3

SHA512
6042e781bea7a658cf48cdfb7c8d1546003b14b5bcac6af1a9559fa63a13c92e0dcead11577f9283313a1b7c706f732e851e0fa8098cba7f2e0b5e4eaa68334e

Download Submit
C:\Users\Admin\AppData\Local\Temp\RESADEB.tmp

Filesize
1KB

MD5
82f72311c4ca9d97a2a973ab327bc09f

SHA1
6200a49189686a464260db3f94b25963495b7b10

SHA256
3c8b3c9e503e9498b1c466dcbe524c8253763296e4a2e5a12265bc35d287aee0

SHA512
050bd19007ec718ad35d424deef0b8000eddfa3ba0d82870a0402b19b08dd101a591cb9f60664e75d8b4979fdb2572d084878761dca51300d92b7008d7154698

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\20ZZAIE0B430RPC6SWQP.temp

Filesize
7KB

MD5
8d82204a23605c059e4deccde7c5299e

SHA1
df2391ff5b862dcc9899cb5a4c1e6265cde26ae9

SHA256
a1353efc0a9f1c509ca38c0417f781f002e0929a0f1704f5a5dc8a0f9280f7c9

SHA512
0a069d03153d51084bf2117ac0c6f180e08d2032c6a2cae68b47b4fbd87ae21a5d71147ed6ce3173660f63aede809a9c4e2c4f4cc34e5f70691874d346de27c6

Download Submit
C:\msWebfontCommonsvc\1Pqb55993gaAnMOQKOP1Zx4Ywr074Tyvs.vbe

Filesize
209B

MD5
7456528d87fdbbf7380081612a878945

SHA1
91a8b74ee56e559e664e7e41bc9c9d0cd7a1e344

SHA256
274fd47fcfe3c642aaed07e9d94fe524e1680020d5b63e0eff71e7155973a961

SHA512
4fa8dbfb2aa1c1117bcbd3d1de7bcbc4140efa1eddbada9652304d136b71cdb5de633ac8d48d68e58d0bb6317c7132b1e140003a6dd564e8114a6ab0501f7877

Download Submit
C:\msWebfontCommonsvc\xOY2DcV2ToDeh.bat

Filesize
105B

MD5
d9b64ed326c6cfceaa29ddbee358a8e2

SHA1
42b494e3ffa836f173e1a2b1e3da8a93ffe39561

SHA256
576041699b52e2a3eddb04819000376696a1ad869711dc5d786473e9b9f3c2de

SHA512
32c74021848f6d9b5dc6d38287fe992299c8e1a12113203e1dbcab5f5d2abe922fa9fdf62e6ba0d6dac8c3d5ea5e66af5deca42fa51f2b0b699e90a89cd82e67

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\pj2xgpry\pj2xgpry.0.cs

Filesize
358B

MD5
f334641c9eb9d8bd64197fe4f898cbaa

SHA1
bc884ccfe0d2f3faef8727f8f51e3157cf4fdbcb

SHA256
055ede1849326eab3f83856982d2909ea0975512ab34439a09c43262e6a442fd

SHA512
eb10308bfe32dee8f981df559a2178f398ef390261f52c82793f202a723f352851e3eed96b8e652cd7e05420e6284cc6418252a2c21635ce1df6d7409f2f059e

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\pj2xgpry\pj2xgpry.cmdline

Filesize
235B

MD5
2d63eeb9af11e8e908fcee69b6c9961c

SHA1
3233c7df577b49aa182fe8c3d1140dec6a2a4fef

SHA256
c5c19409e3e9818daf9409659a56542afba588aaa7f1f7c6dcbfaa525c42b76d

SHA512
03a17f47d9593637c02eea758947f2011c1712700f0d15a8b86ca684566ae403f77fa657757844f85a4beddde6632d4a73c2534fcb12d49778adb21474b6a517

Download Submit
\??\c:\Windows\System32\CSCB752D710AF474CE3AF231083DA90C39E.TMP

Filesize
1KB

MD5
02b6f6024c0f35b2dfb735e30d40ea59

SHA1
9e28d1d16523aab5845e09fdecf27759375f9b5a

SHA256
17491f9c7a135563b4c9dd20e2113e934070166146005e0f97ab301f4a5ef4aa

SHA512
a8a734f3d0f4d6a8904a8faa5638db91e9034c55306f153fdf321731cdfaaa58847d731ee64b226df0bd6cd4b8e6ed6d2ed1af77f510e079755f7159af433672

Download Submit
\msWebfontCommonsvc\ContainerAgentBrowserSession.exe

Filesize
1.8MB

MD5
4b48b143e95e5292b1700bd25ba63c76

SHA1
3b321290b54028f94d2b1736173d18ce16bcc260

SHA256
3b1888daacc09277d0f3daca114f05613f708d260e2950ee5620d77881c584cb

SHA512
f8fb811150f81f9636193506451445b77634b27ad36884bfaa4454887666bbcc7f88ff190e912e3a3f7bf8ed82080280075ad753041d5d9bb50717b22b71bcb0

Download Submit
memory/988-78-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/988-63-0x000000001B570000-0x000000001B852000-memory.dmp

Filesize
2.9MB

Download
memory/1368-86-0x0000000000CF0000-0x0000000000ECA000-memory.dmp

Filesize
1.9MB

Download
memory/2024-47-0x0000000000F50000-0x000000000112A000-memory.dmp

Filesize
1.9MB

Download
memory/2736-21-0x0000000000430000-0x000000000043C000-memory.dmp

Filesize
48KB

Download
memory/2736-19-0x0000000000470000-0x0000000000488000-memory.dmp

Filesize
96KB

Download
memory/2736-17-0x0000000000450000-0x000000000046C000-memory.dmp

Filesize
112KB

Download
memory/2736-15-0x0000000000310000-0x000000000031E000-memory.dmp

Filesize
56KB

Download
memory/2736-13-0x0000000001290000-0x000000000146A000-memory.dmp

Filesize
1.9MB

Download
memory/2940-111-0x00000000029A0000-0x00000000029B0000-memory.dmp

Filesize
64KB

Download