dcrat | 870cd80a419c1b2b24b3cef28291bba2155ebee9a34d7e100ea822a127458069

Resubmissions

13-01-2025 04:31

250113-e5lzsawkgv 10

12-01-2025 16:28

250112-tyzpmaslhj 10

Analysis

max time kernel
896s
max time network
900s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-01-2025 04:31

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General

Target

RecentFiler-tools.exe
Size

3.8MB
MD5

ee83fe3104070859f841afb7af5cbfff
SHA1

3847b3459fca7aec48f5711bedf807a98b845808
SHA256

870cd80a419c1b2b24b3cef28291bba2155ebee9a34d7e100ea822a127458069
SHA512

95fa3e41197443f65dd323445fb615702af73e72e9f8b5cacda5d9eebb94bb60310a87ac4d5d3ea079f536c4dfa194dc8912ab59a968f41c836a5b2a26790ea8
SSDEEP

98304:ymjQg7O4z4P0bk/WgCMZcX08aj5nOq4EniheBXX:XjQga40Mb8WgCOcX0Vj5nv4Eihy

Score

10^/10

dcrat discovery infostealer 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

Checks computer location settings 2 TTPs 3 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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	RecentFiler-tools.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	ChainComponentBroker.exe

Executes dropped EXE 2 IoCs

pid	Process
4848	ChainComponentBroker.exe
3868	TrustedInstaller.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Crashpad\attachments\sppsvc.exe	ChainComponentBroker.exe
File created	C:\Program Files\Crashpad\attachments\0a1fd5f707cd16	ChainComponentBroker.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\diagnostics\scheduled\Maintenance\de-DE\taskhostw.exe	ChainComponentBroker.exe
File created	C:\Windows\PLA\TrustedInstaller.exe	ChainComponentBroker.exe
File created	C:\Windows\PLA\04c1e7795967e4	ChainComponentBroker.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	RecentFiler-tools.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	ChainComponentBroker.exe
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	RecentFiler-tools.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe
4848	ChainComponentBroker.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3868	TrustedInstaller.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4848	ChainComponentBroker.exe
Token: SeDebugPrivilege	3868	TrustedInstaller.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4124 wrote to memory of 4432	4124	RecentFiler-tools.exe	83
PID 4124 wrote to memory of 4432	4124	RecentFiler-tools.exe	83
PID 4124 wrote to memory of 4432	4124	RecentFiler-tools.exe	83
PID 4432 wrote to memory of 1592	4432	WScript.exe	97
PID 4432 wrote to memory of 1592	4432	WScript.exe	97
PID 4432 wrote to memory of 1592	4432	WScript.exe	97
PID 1592 wrote to memory of 4848	1592	cmd.exe	99
PID 1592 wrote to memory of 4848	1592	cmd.exe	99
PID 4848 wrote to memory of 1512	4848	ChainComponentBroker.exe	100
PID 4848 wrote to memory of 1512	4848	ChainComponentBroker.exe	100
PID 1512 wrote to memory of 836	1512	cmd.exe	102
PID 1512 wrote to memory of 836	1512	cmd.exe	102
PID 1512 wrote to memory of 1036	1512	cmd.exe	103
PID 1512 wrote to memory of 1036	1512	cmd.exe	103
PID 1512 wrote to memory of 3868	1512	cmd.exe	105
PID 1512 wrote to memory of 3868	1512	cmd.exe	105

C:\Users\Admin\AppData\Local\Temp\RecentFiler-tools.exe
C:\Users\Admin\AppData\Local\Temp\RecentFiler-tools.exe cmd /c %SIGILL% "SIGTERM|DELETE|SIGKILL"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4124
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\PortServerhostSvc\xl2BY7hUATvIvm8WXmzFfuGvvzOXUuoRYHPMiHR7I0i9cVaBUQZJ.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4432
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\PortServerhostSvc\SuMLTgi2uZW9T5eaPr1TCicpxOY3.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1592
  - - C:\PortServerhostSvc\ChainComponentBroker.exe
      "C:\PortServerhostSvc/ChainComponentBroker.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      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:4848
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\WjSZo78gzm.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1512
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:836
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:1036
      - C:\Windows\PLA\TrustedInstaller.exe
        
        "C:\Windows\PLA\TrustedInstaller.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:3868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\PortServerhostSvc\ChainComponentBroker.exe

Filesize
3.5MB

MD5
2efa4ad7593974a4e0717d61e179dd0c

SHA1
d259b483ace58d50c92006fb75029a0ec75bc494

SHA256
b3ea7e9e2daf6379d02c8216b732f893da712de9019ae5bd6569477a773574e9

SHA512
d378b579be3bf7c4a34ce5c98e134a4b0385f1cca1b6ecc35e727cc3442a8555c648b3924d20c944350b291945a372694305d61caac02a5d805c0e466cb800a2

Download Submit
C:\PortServerhostSvc\SuMLTgi2uZW9T5eaPr1TCicpxOY3.bat

Filesize
99B

MD5
6d2acf4f20a4b8eb620a8af617a30b1a

SHA1
48bf25a53cc71b1cb20a9d6a98cfcb374b61745c

SHA256
0f3a9ca5ca00eba7a075c92d5ed4e9ee9c2c4ef9b2be772b576d58292defca41

SHA512
6a3d8c6af2d2e3bd46b2d29dc33a991aa94872a894881c4c51ca4e02b96295e93cba6afab1457eb0882a070590adc4762a616b5fda6563f125e593fbda9e1fbc

Download Submit
C:\PortServerhostSvc\xl2BY7hUATvIvm8WXmzFfuGvvzOXUuoRYHPMiHR7I0i9cVaBUQZJ.vbe

Filesize
224B

MD5
693e257a3b1da7e465e8b3f269d87573

SHA1
fceec85970a091aaac391749cfa0eb680e9927ed

SHA256
90b252e638ecfeac0c398110377415345ee7df3ec09854edd218eefdb5a18db3

SHA512
d9c284106fe51577b5d841f1f852b44e188301965b31831d90b90f31d149b8d9889b7f54506c1fd502245df82d89e82d0067d4d5f9d1c59003623aa2d4215313

Download Submit
C:\Users\Admin\AppData\Local\Temp\WjSZo78gzm.bat

Filesize
211B

MD5
2e8107395f3114bbf942c5dd8f4ec697

SHA1
990250d1fc96bc0feab3296907f45f73c702a29d

SHA256
acfb4148d29655cfcb9bd04535476d3a82a4b179cd868d60dccd2164919b6c25

SHA512
63dc204e7ec281747488189cb2f7a9d5ffa443176a662c9054ad7f6dbd909329befe218b5d4a90fc17d84b2703d63add36d388b05b3e2a8295fca4497e88b929

Download Submit
memory/3868-103-0x000000001DFC0000-0x000000001E00E000-memory.dmp

Filesize
312KB

Download
memory/4848-36-0x000000001D1C0000-0x000000001D1D6000-memory.dmp

Filesize
88KB

Download
memory/4848-39-0x000000001D730000-0x000000001DC58000-memory.dmp

Filesize
5.2MB

Download
memory/4848-19-0x000000001BBA0000-0x000000001BBBC000-memory.dmp

Filesize
112KB

Download
memory/4848-20-0x000000001D150000-0x000000001D1A0000-memory.dmp

Filesize
320KB

Download
memory/4848-22-0x0000000003160000-0x0000000003170000-memory.dmp

Filesize
64KB

Download
memory/4848-24-0x000000001BCF0000-0x000000001BD08000-memory.dmp

Filesize
96KB

Download
memory/4848-26-0x0000000003170000-0x0000000003180000-memory.dmp

Filesize
64KB

Download
memory/4848-28-0x000000001BCD0000-0x000000001BCE0000-memory.dmp

Filesize
64KB

Download
memory/4848-30-0x000000001BCE0000-0x000000001BCEE000-memory.dmp

Filesize
56KB

Download
memory/4848-32-0x000000001D120000-0x000000001D132000-memory.dmp

Filesize
72KB

Download
memory/4848-34-0x000000001D100000-0x000000001D110000-memory.dmp

Filesize
64KB

Download
memory/4848-15-0x000000001BD20000-0x000000001BD46000-memory.dmp

Filesize
152KB

Download
memory/4848-38-0x000000001D1E0000-0x000000001D1F2000-memory.dmp

Filesize
72KB

Download
memory/4848-17-0x0000000001860000-0x000000000186E000-memory.dmp

Filesize
56KB

Download
memory/4848-41-0x000000001D110000-0x000000001D11E000-memory.dmp

Filesize
56KB

Download
memory/4848-43-0x000000001D140000-0x000000001D150000-memory.dmp

Filesize
64KB

Download
memory/4848-45-0x000000001D1A0000-0x000000001D1B0000-memory.dmp

Filesize
64KB

Download
memory/4848-47-0x000000001D260000-0x000000001D2BA000-memory.dmp

Filesize
360KB

Download
memory/4848-49-0x000000001D1B0000-0x000000001D1BE000-memory.dmp

Filesize
56KB

Download
memory/4848-51-0x000000001D200000-0x000000001D210000-memory.dmp

Filesize
64KB

Download
memory/4848-53-0x000000001D210000-0x000000001D21E000-memory.dmp

Filesize
56KB

Download
memory/4848-55-0x000000001D240000-0x000000001D258000-memory.dmp

Filesize
96KB

Download
memory/4848-57-0x000000001D220000-0x000000001D22C000-memory.dmp

Filesize
48KB

Download
memory/4848-59-0x000000001D510000-0x000000001D55E000-memory.dmp

Filesize
312KB

Download
memory/4848-76-0x000000001D6A0000-0x000000001D6EE000-memory.dmp

Filesize
312KB

Download
memory/4848-13-0x0000000000BF0000-0x0000000000F7E000-memory.dmp

Filesize
3.6MB

Download
memory/4848-12-0x00007FFA130F3000-0x00007FFA130F5000-memory.dmp

Filesize
8KB

Download