dcrat | f8eb9b286a0d33e287568961f883aa9d1be6e9ec8cf5eee3a3a1a6b106d02f74

Analysis

max time kernel
103s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:15

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General

Target

ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Size

984KB
MD5

ba6c7a8dc76a63c70a2e018c2bd2a059
SHA1

180970254354af46194e8ff74362230c6b667cd6
SHA256

89333332d2bf50e37c6df1a85b3d03d7f6bdd1b16fae842656dab89ba42252ec
SHA512

cfc904608b4af9b6be68c3750fb3b134e88c387c5521e4d4e9a4dd2a26cfc17774096d78e5c50bdffa7d0e12c941c850f72de46e639d441b511f193dc5d7ce6e
SSDEEP

12288:zzZvuvewk/0pPPXA5q/TQ9+n95vV25gnwHexSDwbwvDxlpaS98IUNldnd65EgF1s:zzZvuGD2PvA5YxwmbZB6Uv

Score

10^/10

dcrat infostealer persistence rat

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

Process spawned unexpected child process 10 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	2932	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1336	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3576	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1916	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4936	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4444	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2496	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4516	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4560	4912	schtasks.exe	90
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4580	4912	schtasks.exe	90

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Executes dropped EXE 1 IoCs

pid	Process
5948	explorer.exe

Adds Run key to start application 2 TTPs 10 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\unsecapp = "\"C:\\Windows\\System32\\wbem\\textvaluelist\\unsecapp.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Windows\\System32\\CIRCoInst\\fontdrvhost.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\ProgramData\\Package Cache\\{E634F316-BEB6-4FB3-A612-F7102F576165}v48.108.8836\\explorer.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmon = "\"C:\\Program Files\\Windows Mail\\sysmon.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Program Files (x86)\\WindowsPowerShell\\Configuration\\Registration\\RuntimeBroker.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\unsecapp = "\"C:\\PerfLogs\\unsecapp.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmon = "\"C:\\Documents and Settings\\sysmon.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Windows\\System32\\mlang\\fontdrvhost.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmon = "\"C:\\Windows\\sysmon\\sysmon.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\Windows\\System32\\dhcpcore6\\taskhostw.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Drops file in System32 directory 16 IoCs

description	ioc	Process
File created	C:\Windows\System32\mlang\5b884080fd4f94	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\CIRCoInst\RCX72C9.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\dhcpcore6\taskhostw.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\wbem\textvaluelist\29c1c3cc0f7685	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\CIRCoInst\fontdrvhost.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\CIRCoInst\5b884080fd4f94	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\mlang\RCX60EE.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\mlang\fontdrvhost.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\mlang\fontdrvhost.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\wbem\textvaluelist\unsecapp.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\dhcpcore6\taskhostw.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\wbem\textvaluelist\RCX69DC.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\wbem\textvaluelist\unsecapp.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\dhcpcore6\ea9f0e6c9e2dcd	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\dhcpcore6\RCX67D7.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\CIRCoInst\fontdrvhost.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Drops file in Program Files directory 8 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Mail\sysmon.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Program Files\Windows Mail\121e5b5079f7c0	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\9e8d7a4ca61bd9	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Program Files\Windows Mail\RCX65D2.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Program Files\Windows Mail\sysmon.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RCX6BE0.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\sysmon\sysmon.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\sysmon\121e5b5079f7c0	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\sysmon\RCX6370.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\sysmon\sysmon.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000_Classes\Local Settings	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 10 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1916	schtasks.exe
4936	schtasks.exe
2496	schtasks.exe
4560	schtasks.exe
2932	schtasks.exe
1336	schtasks.exe
3576	schtasks.exe
4444	schtasks.exe
4516	schtasks.exe
4580	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
6064	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
6064	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
6064	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
6064	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
6064	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	6064	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Token: SeDebugPrivilege	5948	explorer.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 6064 wrote to memory of 1656	6064	ba6c7a8dc76a63c70a2e018c2bd2a059.exe	105
PID 6064 wrote to memory of 1656	6064	ba6c7a8dc76a63c70a2e018c2bd2a059.exe	105
PID 1656 wrote to memory of 2272	1656	cmd.exe	107
PID 1656 wrote to memory of 2272	1656	cmd.exe	107
PID 1656 wrote to memory of 5948	1656	cmd.exe	111
PID 1656 wrote to memory of 5948	1656	cmd.exe	111

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\ba6c7a8dc76a63c70a2e018c2bd2a059.exe
"C:\Users\Admin\AppData\Local\Temp\ba6c7a8dc76a63c70a2e018c2bd2a059.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:6064
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\r7c2NOP5Gi.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1656
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2272
- - C:\ProgramData\Package Cache\{E634F316-BEB6-4FB3-A612-F7102F576165}v48.108.8836\explorer.exe
    "C:\ProgramData\Package Cache\{E634F316-BEB6-4FB3-A612-F7102F576165}v48.108.8836\explorer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:5948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\ProgramData\Package Cache\{E634F316-BEB6-4FB3-A612-F7102F576165}v48.108.8836\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2932

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\mlang\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1336

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\sysmon\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3576

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\dhcpcore6\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4936

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\textvaluelist\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4444

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Configuration\Registration\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2496

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\PerfLogs\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4516

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Documents and Settings\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4560

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\CIRCoInst\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\r7c2NOP5Gi.bat

Filesize
256B

MD5
5bee455cd34cbb752be47e5a4c4c2b28

SHA1
67020f2f1cde1df1e3178bad39696e6e147507e0

SHA256
665c1a6aef2fc772d2522f42ffd6011708e7aed92762095442fc0f433d865429

SHA512
2891baba6bc82785b46c6bd7b19aa7bacfa6280e0093957472c6998324a9fdf0ee93c0af142863f67572524160d07fa84567a455266c4bd6c75b1e6d645d258d

Download Submit
C:\Windows\System32\dhcpcore6\taskhostw.exe

Filesize
984KB

MD5
ba6c7a8dc76a63c70a2e018c2bd2a059

SHA1
180970254354af46194e8ff74362230c6b667cd6

SHA256
89333332d2bf50e37c6df1a85b3d03d7f6bdd1b16fae842656dab89ba42252ec

SHA512
cfc904608b4af9b6be68c3750fb3b134e88c387c5521e4d4e9a4dd2a26cfc17774096d78e5c50bdffa7d0e12c941c850f72de46e639d441b511f193dc5d7ce6e

Download Submit
memory/6064-7-0x00000000018D0000-0x00000000018D8000-memory.dmp

Filesize
32KB

Download
memory/6064-9-0x000000001BC10000-0x000000001BC1C000-memory.dmp

Filesize
48KB

Download
memory/6064-4-0x000000001C180000-0x000000001C1D0000-memory.dmp

Filesize
320KB

Download
memory/6064-5-0x0000000001870000-0x0000000001880000-memory.dmp

Filesize
64KB

Download
memory/6064-6-0x00000000018C0000-0x00000000018D0000-memory.dmp

Filesize
64KB

Download
memory/6064-8-0x000000001BC00000-0x000000001BC10000-memory.dmp

Filesize
64KB

Download
memory/6064-0-0x00007FFA2ECD3000-0x00007FFA2ECD5000-memory.dmp

Filesize
8KB

Download
memory/6064-3-0x0000000001890000-0x00000000018AC000-memory.dmp

Filesize
112KB

Download
memory/6064-10-0x000000001C130000-0x000000001C142000-memory.dmp

Filesize
72KB

Download
memory/6064-12-0x000000001C160000-0x000000001C16C000-memory.dmp

Filesize
48KB

Download
memory/6064-11-0x000000001C980000-0x000000001CEA8000-memory.dmp

Filesize
5.2MB

Download
memory/6064-2-0x00007FFA2ECD0000-0x00007FFA2F791000-memory.dmp

Filesize
10.8MB

Download
memory/6064-1-0x0000000000EC0000-0x0000000000FBC000-memory.dmp

Filesize
1008KB

Download
memory/6064-109-0x00007FFA2ECD0000-0x00007FFA2F791000-memory.dmp

Filesize
10.8MB

Download