dcrat | a2d3d6430f6775951cf988d960cfae4093d7a1e4d0f684ddfffaf4599ace9a71

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 1240 created 496 1240 WerFault.exe svchost.exe
Executes dropped EXE 2 IoCs

Processes:

wincommon.exesvchost.exe

pid process

2272 wincommon.exe
496 svchost.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1240 496 WerFault.exe svchost.exe
Creates scheduled task(s) 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

3740 schtasks.exe
4080 schtasks.exe
740 schtasks.exe
3664 schtasks.exe

description	pid	process	target process
PID 1240 created 496	1240	WerFault.exe	svchost.exe

pid	pid_target	process	target process
1240	496	WerFault.exe	svchost.exe

pid	process
3740	schtasks.exe
4080	schtasks.exe
740	schtasks.exe
3664	schtasks.exe

Modifies registry class 1 IoCs

Processes:

ForceOp 2.8.7 - By RaiSence.bin.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	ForceOp 2.8.7 - By RaiSence.bin.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

wincommon.exesvchost.exeWerFault.exe

pid	process
2272	wincommon.exe
496	svchost.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe
1240	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

wincommon.exesvchost.exeWerFault.exe

description pid process

Token: SeDebugPrivilege 2272 wincommon.exe
Token: SeDebugPrivilege 496 svchost.exe
Token: SeDebugPrivilege 1240 WerFault.exe

description	pid	process
Token: SeDebugPrivilege	2272	wincommon.exe
Token: SeDebugPrivilege	496	svchost.exe
Token: SeDebugPrivilege	1240	WerFault.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

ForceOp 2.8.7 - By RaiSence.bin.exeWScript.execmd.exewincommon.exe

description	pid	process	target process
PID 640 wrote to memory of 3456	640	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 640 wrote to memory of 3456	640	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 640 wrote to memory of 3456	640	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 640 wrote to memory of 504	640	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 640 wrote to memory of 504	640	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 640 wrote to memory of 504	640	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 3456 wrote to memory of 3652	3456	WScript.exe	cmd.exe
PID 3456 wrote to memory of 3652	3456	WScript.exe	cmd.exe
PID 3456 wrote to memory of 3652	3456	WScript.exe	cmd.exe
PID 3652 wrote to memory of 2272	3652	cmd.exe	wincommon.exe
PID 3652 wrote to memory of 2272	3652	cmd.exe	wincommon.exe
PID 2272 wrote to memory of 3740	2272	wincommon.exe	schtasks.exe
PID 2272 wrote to memory of 3740	2272	wincommon.exe	schtasks.exe
PID 2272 wrote to memory of 4080	2272	wincommon.exe	schtasks.exe
PID 2272 wrote to memory of 4080	2272	wincommon.exe	schtasks.exe
PID 2272 wrote to memory of 740	2272	wincommon.exe	schtasks.exe
PID 2272 wrote to memory of 740	2272	wincommon.exe	schtasks.exe
PID 2272 wrote to memory of 3664	2272	wincommon.exe	schtasks.exe
PID 2272 wrote to memory of 3664	2272	wincommon.exe	schtasks.exe
PID 2272 wrote to memory of 496	2272	wincommon.exe	svchost.exe
PID 2272 wrote to memory of 496	2272	wincommon.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\ForceOp 2.8.7 - By RaiSence.bin.exe
"C:\Users\Admin\AppData\Local\Temp\ForceOp 2.8.7 - By RaiSence.bin.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:640

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\intofont\1Udi0TDz635jTrMWFNrE4kqnOIuYIi.vbe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3456

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\intofont\xLg6v1j1ZJy5DZ1pz826KfZq2BmfLM.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:3652

C:\intofont\wincommon.exe
"C:\intofont\wincommon.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2272

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
5⤵
- Creates scheduled task(s)
PID:3740

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Users\Public\Videos\svchost.exe'" /rl HIGHEST /f
5⤵
- Creates scheduled task(s)
PID:4080

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Users\Default User\svchost.exe'" /rl HIGHEST /f
5⤵
- Creates scheduled task(s)
PID:740

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\svchost.exe'" /rl HIGHEST /f
5⤵
- Creates scheduled task(s)
PID:3664

C:\Recovery\WindowsRE\svchost.exe
"C:\Recovery\WindowsRE\svchost.exe"
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:496

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 496 -s 1692
6⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1240

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\intofont\msg.vbs"
2⤵
PID:504

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Recovery\WindowsRE\svchost.exe

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C:\Recovery\WindowsRE\svchost.exe

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C:\intofont\1Udi0TDz635jTrMWFNrE4kqnOIuYIi.vbe

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C:\intofont\MOS

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C:\intofont\msg.vbs

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C:\intofont\wincommon.exe

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C:\intofont\wincommon.exe

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C:\intofont\xLg6v1j1ZJy5DZ1pz826KfZq2BmfLM.bat

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memory/496-48-0x0000000000000000-mapping.dmp

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memory/496-32-0x0000000000000000-mapping.dmp

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memory/496-51-0x0000000000000000-mapping.dmp

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memory/496-52-0x0000000000000000-mapping.dmp

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memory/496-50-0x0000000000000000-mapping.dmp

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memory/496-49-0x0000000000000000-mapping.dmp

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memory/496-47-0x0000000000000000-mapping.dmp

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memory/496-53-0x0000000000000000-mapping.dmp

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memory/496-55-0x0000000000000000-mapping.dmp

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memory/496-45-0x0000000000000000-mapping.dmp

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memory/496-54-0x0000000000000000-mapping.dmp

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memory/496-44-0x0000000000000000-mapping.dmp

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memory/496-35-0x00007FF9E9F90000-0x00007FF9EA97C000-memory.dmp

Filesize
9.9MB

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memory/496-46-0x0000000000000000-mapping.dmp

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memory/496-40-0x0000000000000000-mapping.dmp

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memory/496-41-0x0000000000000000-mapping.dmp

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memory/496-42-0x0000000000000000-mapping.dmp

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memory/496-43-0x0000000000000000-mapping.dmp

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memory/504-15-0x0000000000000000-mapping.dmp

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memory/740-30-0x0000000000000000-mapping.dmp

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memory/1240-39-0x000001E44ECB0000-0x000001E44ECB1000-memory.dmp

Filesize
4KB

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memory/1240-56-0x000001E44FA20000-0x000001E44FA21000-memory.dmp

Filesize
4KB

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memory/1240-57-0x000001E44FA20000-0x000001E44FA21000-memory.dmp

Filesize
4KB

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memory/2272-21-0x0000000000000000-mapping.dmp

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memory/2272-27-0x000000001AC40000-0x000000001AC41000-memory.dmp

Filesize
4KB

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memory/2272-25-0x00000000000B0000-0x00000000000B1000-memory.dmp

Filesize
4KB

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memory/2272-24-0x00007FF9E9F90000-0x00007FF9EA97C000-memory.dmp

Filesize
9.9MB

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memory/3456-2-0x0000000000000000-mapping.dmp

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memory/3652-20-0x0000000000000000-mapping.dmp

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memory/3664-31-0x0000000000000000-mapping.dmp

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memory/3740-28-0x0000000000000000-mapping.dmp

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memory/4080-29-0x0000000000000000-mapping.dmp

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