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 3948 created 2416 3948 WerFault.exe svchost.exe
Executes dropped EXE 2 IoCs

Processes:

wincommon.exesvchost.exe

pid process

3444 wincommon.exe
2416 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

3948 2416 WerFault.exe svchost.exe
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1664 schtasks.exe
3832 schtasks.exe

description	pid	process	target process
PID 3948 created 2416	3948	WerFault.exe	svchost.exe

pid	pid_target	process	target process
3948	2416	WerFault.exe	svchost.exe

pid	process
1664	schtasks.exe
3832	schtasks.exe

Modifies registry class 1 IoCs

Processes:

ForceOp 2.8.7 - By RaiSence.bin.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	ForceOp 2.8.7 - By RaiSence.bin.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

wincommon.exesvchost.exeWerFault.exe

pid	process
3444	wincommon.exe
2416	svchost.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

wincommon.exesvchost.exeWerFault.exe

description pid process

Token: SeDebugPrivilege 3444 wincommon.exe
Token: SeDebugPrivilege 2416 svchost.exe
Token: SeDebugPrivilege 3948 WerFault.exe

description	pid	process
Token: SeDebugPrivilege	3444	wincommon.exe
Token: SeDebugPrivilege	2416	svchost.exe
Token: SeDebugPrivilege	3948	WerFault.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

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

description	pid	process	target process
PID 3920 wrote to memory of 1628	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 3920 wrote to memory of 1628	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 3920 wrote to memory of 1628	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 3920 wrote to memory of 2464	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 3920 wrote to memory of 2464	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 3920 wrote to memory of 2464	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	WScript.exe
PID 1628 wrote to memory of 1568	1628	WScript.exe	cmd.exe
PID 1628 wrote to memory of 1568	1628	WScript.exe	cmd.exe
PID 1628 wrote to memory of 1568	1628	WScript.exe	cmd.exe
PID 1568 wrote to memory of 3444	1568	cmd.exe	wincommon.exe
PID 1568 wrote to memory of 3444	1568	cmd.exe	wincommon.exe
PID 3444 wrote to memory of 3832	3444	wincommon.exe	schtasks.exe
PID 3444 wrote to memory of 3832	3444	wincommon.exe	schtasks.exe
PID 3444 wrote to memory of 1664	3444	wincommon.exe	schtasks.exe
PID 3444 wrote to memory of 1664	3444	wincommon.exe	schtasks.exe
PID 3444 wrote to memory of 2416	3444	wincommon.exe	svchost.exe
PID 3444 wrote to memory of 2416	3444	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:3920

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\intofont\1Udi0TDz635jTrMWFNrE4kqnOIuYIi.vbe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1628

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\intofont\xLg6v1j1ZJy5DZ1pz826KfZq2BmfLM.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:1568

C:\intofont\wincommon.exe
"C:\intofont\wincommon.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3444

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\PerfLogs\svchost.exe'" /rl HIGHEST /f
5⤵
- Creates scheduled task(s)
PID:3832

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:1664

C:\Recovery\WindowsRE\svchost.exe
"C:\Recovery\WindowsRE\svchost.exe"
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2416

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 2416 -s 1512
6⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3948

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\intofont\msg.vbs"
2⤵
PID:2464

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

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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/1568-18-0x0000000000000000-mapping.dmp

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memory/1628-0-0x0000000000000000-mapping.dmp

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memory/1664-27-0x0000000000000000-mapping.dmp

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memory/2416-31-0x00007FF90A690000-0x00007FF90B07C000-memory.dmp

Filesize
9.9MB

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memory/2416-46-0x0000000000000000-mapping.dmp

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memory/2416-50-0x0000000000000000-mapping.dmp

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memory/2416-49-0x0000000000000000-mapping.dmp

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memory/2416-28-0x0000000000000000-mapping.dmp

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memory/2416-47-0x0000000000000000-mapping.dmp

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memory/2416-48-0x0000000000000000-mapping.dmp

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memory/2416-44-0x0000000000000000-mapping.dmp

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memory/2416-45-0x0000000000000000-mapping.dmp

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memory/2416-36-0x0000000000000000-mapping.dmp

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memory/2416-37-0x0000000000000000-mapping.dmp

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memory/2416-38-0x0000000000000000-mapping.dmp

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memory/2416-39-0x0000000000000000-mapping.dmp

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memory/2416-40-0x0000000000000000-mapping.dmp

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memory/2416-41-0x0000000000000000-mapping.dmp

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memory/2416-42-0x0000000000000000-mapping.dmp

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memory/2416-43-0x0000000000000000-mapping.dmp

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memory/2464-14-0x0000000000000000-mapping.dmp

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memory/3444-25-0x0000000001200000-0x0000000001201000-memory.dmp

Filesize
4KB

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memory/3444-19-0x0000000000000000-mapping.dmp

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memory/3444-22-0x00007FF90A690000-0x00007FF90B07C000-memory.dmp

Filesize
9.9MB

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memory/3444-23-0x0000000000960000-0x0000000000961000-memory.dmp

Filesize
4KB

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memory/3832-26-0x0000000000000000-mapping.dmp

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memory/3948-35-0x0000021DCAF10000-0x0000021DCAF11000-memory.dmp

Filesize
4KB

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memory/3948-51-0x0000021DCBC80000-0x0000021DCBC81000-memory.dmp

Filesize
4KB

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memory/3948-52-0x0000021DCBC80000-0x0000021DCBC81000-memory.dmp

Filesize
4KB

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memory/3948-54-0x0000021DCBC80000-0x0000021DCBC81000-memory.dmp

Filesize
4KB

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