dcrat | 7a2e63f7601af70c3660110cd7d0967d909b2c5ad2ab3bdf834c85d900fe5c94

Analysis

max time kernel
146s
max time network
151s
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 14:08

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General

Target

Echotest.exe
Size

3.8MB
MD5

a6055484fbf56a8cfe6a8ce1ad5fe91c
SHA1

5e159ecd3265c619dcaae0dbdfaa71fa0533c6f6
SHA256

7a2e63f7601af70c3660110cd7d0967d909b2c5ad2ab3bdf834c85d900fe5c94
SHA512

6f0dc67e4c14b34cc000e3ad1886f4586d02bba55f5ae8f7ae46eb7269f9603b9120ffe7053fc2cfd91ee3f2f6eb250a47e6cad53e73cbe9e637cfc6f9f847f7
SSDEEP

98304:yTApDs2KOw0axITDx00qlvqZpXSfU7dFDSfJtMKSGM:Cp2Kf0ZTDx0z88fUdEIKSGM

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Echotest.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	ChainComponentBroker.exe

Executes dropped EXE 2 IoCs

pid	Process
4072	ChainComponentBroker.exe
3168	MoUsoCoreWorker.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\ShellExperiences\StartMenuExperienceHost.exe	ChainComponentBroker.exe
File created	C:\Windows\ShellExperiences\55b276f4edf653	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	Echotest.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-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	Echotest.exe
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	ChainComponentBroker.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe
4072	ChainComponentBroker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4072	ChainComponentBroker.exe
Token: SeDebugPrivilege	3168	MoUsoCoreWorker.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 732 wrote to memory of 2800	732	Echotest.exe	83
PID 732 wrote to memory of 2800	732	Echotest.exe	83
PID 732 wrote to memory of 2800	732	Echotest.exe	83
PID 2800 wrote to memory of 1812	2800	WScript.exe	96
PID 2800 wrote to memory of 1812	2800	WScript.exe	96
PID 2800 wrote to memory of 1812	2800	WScript.exe	96
PID 1812 wrote to memory of 4072	1812	cmd.exe	98
PID 1812 wrote to memory of 4072	1812	cmd.exe	98
PID 4072 wrote to memory of 1560	4072	ChainComponentBroker.exe	99
PID 4072 wrote to memory of 1560	4072	ChainComponentBroker.exe	99
PID 1560 wrote to memory of 3848	1560	cmd.exe	101
PID 1560 wrote to memory of 3848	1560	cmd.exe	101
PID 1560 wrote to memory of 4204	1560	cmd.exe	102
PID 1560 wrote to memory of 4204	1560	cmd.exe	102
PID 1560 wrote to memory of 3168	1560	cmd.exe	104
PID 1560 wrote to memory of 3168	1560	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\Echotest.exe
"C:\Users\Admin\AppData\Local\Temp\Echotest.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:732
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\PortServerhostSvc\0u1xIFn5uBTahgPweE61XDW6gni0pA9hGvjOu.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2800
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\PortServerhostSvc\deeiCKZkZiO4AO25b.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1812
  - - C:\PortServerhostSvc\ChainComponentBroker.exe
      "C:\PortServerhostSvc/ChainComponentBroker.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Windows directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4072
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\eRkT6yrmV3.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1560
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:3848
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:4204
      - C:\Recovery\WindowsRE\MoUsoCoreWorker.exe
        
        "C:\Recovery\WindowsRE\MoUsoCoreWorker.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:3168

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\0u1xIFn5uBTahgPweE61XDW6gni0pA9hGvjOu.vbe

Filesize
213B

MD5
1756f8178d512638ebc8309601aee1da

SHA1
b860c43f352f88394555c3e9377114d03265554d

SHA256
4b404d99abccf5a372b76f904723e69d2c52746305f51d26c82d4a59842e4aaa

SHA512
be69f0e7ce83717de283f44e95ba46c6d192d926060315bd43c393fd5dacf89213fd41e545586c27479f678fa29ad4b4a12823c163e8d555a071488981d6b622

Download Submit
C:\PortServerhostSvc\ChainComponentBroker.exe

Filesize
3.5MB

MD5
748b7d9fafaffefe123f11305dd0383b

SHA1
9e94086fce6fc65a72e2f339cb5cffeb3545390c

SHA256
8c9eb584cec3f2640cbdb865cdbb38413f63e7d1485d41bde77bc56624b00890

SHA512
4ab9d407d0d8f5e8ab6c9f8a802fedbfe5b49eccc590e52495dbb1ee0f948b65c7bc3aefbc94c6a500c22453114a423404e9ce00b74642d8c9314d6c032e9354

Download Submit
C:\PortServerhostSvc\deeiCKZkZiO4AO25b.bat

Filesize
88B

MD5
c8423ea58aa138504ea50ad34e8dcd74

SHA1
f3054ba306c1605084d4c4ac6b213b3130061d85

SHA256
a02c0e705931f16ed8c56c6797eab6f0a1f14fbc4237f529244278b3c117feae

SHA512
7151a7f841b05c0a1d1f48f176416ee8988508bee65f9253a9973284ab83cfdf2898ade5979bd30e5a80e2fe41cfc849ebdc8fa0b526be9369b50d32ab4d321b

Download Submit
C:\Users\Admin\AppData\Local\Temp\eRkT6yrmV3.bat

Filesize
217B

MD5
5c7de5b01eadd1f0d189974bc04f37fc

SHA1
e9d666b911391488dac791f23dae53d43ee5477c

SHA256
50d8b99c4a03dfcc05a9e53d0195f646d58edf3ffefe0219822952250affefa5

SHA512
feef8bc0500f56088c20bf92e84ad2596f46a402d0f9d3e23d2643a3019a58a1e6794db73ffb5847f82e0994193af3baa9c2169d774bcf8ff46d7636181f11b9

Download Submit
memory/3168-102-0x000000001D9C0000-0x000000001DA2B000-memory.dmp

Filesize
428KB

Download
memory/4072-32-0x000000001B9B0000-0x000000001B9C2000-memory.dmp

Filesize
72KB

Download
memory/4072-39-0x000000001D510000-0x000000001DA38000-memory.dmp

Filesize
5.2MB

Download
memory/4072-19-0x000000001B8E0000-0x000000001B8FC000-memory.dmp

Filesize
112KB

Download
memory/4072-20-0x000000001B960000-0x000000001B9B0000-memory.dmp

Filesize
320KB

Download
memory/4072-22-0x0000000002F90000-0x0000000002FA0000-memory.dmp

Filesize
64KB

Download
memory/4072-24-0x000000001B910000-0x000000001B928000-memory.dmp

Filesize
96KB

Download
memory/4072-26-0x000000001B880000-0x000000001B890000-memory.dmp

Filesize
64KB

Download
memory/4072-28-0x000000001B890000-0x000000001B8A0000-memory.dmp

Filesize
64KB

Download
memory/4072-30-0x000000001B8A0000-0x000000001B8AE000-memory.dmp

Filesize
56KB

Download
memory/4072-15-0x000000001B8B0000-0x000000001B8D6000-memory.dmp

Filesize
152KB

Download
memory/4072-34-0x000000001B930000-0x000000001B940000-memory.dmp

Filesize
64KB

Download
memory/4072-36-0x000000001CFA0000-0x000000001CFB6000-memory.dmp

Filesize
88KB

Download
memory/4072-38-0x000000001CFC0000-0x000000001CFD2000-memory.dmp

Filesize
72KB

Download
memory/4072-17-0x0000000002E30000-0x0000000002E3E000-memory.dmp

Filesize
56KB

Download
memory/4072-41-0x000000001B940000-0x000000001B94E000-memory.dmp

Filesize
56KB

Download
memory/4072-43-0x000000001B950000-0x000000001B960000-memory.dmp

Filesize
64KB

Download
memory/4072-45-0x000000001B9D0000-0x000000001B9E0000-memory.dmp

Filesize
64KB

Download
memory/4072-47-0x000000001D040000-0x000000001D09A000-memory.dmp

Filesize
360KB

Download
memory/4072-49-0x000000001CFE0000-0x000000001CFEE000-memory.dmp

Filesize
56KB

Download
memory/4072-51-0x000000001CFF0000-0x000000001D000000-memory.dmp

Filesize
64KB

Download
memory/4072-53-0x000000001D000000-0x000000001D00E000-memory.dmp

Filesize
56KB

Download
memory/4072-55-0x000000001D2A0000-0x000000001D2B8000-memory.dmp

Filesize
96KB

Download
memory/4072-57-0x000000001D010000-0x000000001D01C000-memory.dmp

Filesize
48KB

Download
memory/4072-59-0x000000001D310000-0x000000001D35E000-memory.dmp

Filesize
312KB

Download
memory/4072-13-0x00000000009E0000-0x0000000000D6C000-memory.dmp

Filesize
3.5MB

Download
memory/4072-12-0x00007FFBE08D3000-0x00007FFBE08D5000-memory.dmp

Filesize
8KB

Download