dcrat | 7a2e63f7601af70c3660110cd7d0967d909b2c5ad2ab3bdf834c85d900fe5c94

Resubmissions

13-01-2025 13:56

250113-q81swswqcp 10

13-01-2025 13:53

250113-q64rrswpgm 10

Analysis

max time kernel
119s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
13-01-2025 13:53

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General

Target

Echo test.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

Executes dropped EXE 2 IoCs

pid	Process
3000	ChainComponentBroker.exe
2744	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
2780	cmd.exe
2780	cmd.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\System.exe	ChainComponentBroker.exe
File created	C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\27d1bcfc3c54e0	ChainComponentBroker.exe
File created	C:\Program Files (x86)\Windows Media Player\taskhost.exe	ChainComponentBroker.exe
File created	C:\Program Files (x86)\Windows Media Player\b75386f1303e64	ChainComponentBroker.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Branding\Basebrd\en-US\dwm.exe	ChainComponentBroker.exe
File created	C:\Windows\Branding\Basebrd\en-US\6cb0b6c459d5d3	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Echo test.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2816	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2816	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe
3000	ChainComponentBroker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3000	ChainComponentBroker.exe
Token: SeDebugPrivilege	2744	cmd.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 2464	1404	Echo test.exe	31
PID 1404 wrote to memory of 2464	1404	Echo test.exe	31
PID 1404 wrote to memory of 2464	1404	Echo test.exe	31
PID 1404 wrote to memory of 2464	1404	Echo test.exe	31
PID 2464 wrote to memory of 2780	2464	WScript.exe	32
PID 2464 wrote to memory of 2780	2464	WScript.exe	32
PID 2464 wrote to memory of 2780	2464	WScript.exe	32
PID 2464 wrote to memory of 2780	2464	WScript.exe	32
PID 2780 wrote to memory of 3000	2780	cmd.exe	34
PID 2780 wrote to memory of 3000	2780	cmd.exe	34
PID 2780 wrote to memory of 3000	2780	cmd.exe	34
PID 2780 wrote to memory of 3000	2780	cmd.exe	34
PID 3000 wrote to memory of 756	3000	ChainComponentBroker.exe	35
PID 3000 wrote to memory of 756	3000	ChainComponentBroker.exe	35
PID 3000 wrote to memory of 756	3000	ChainComponentBroker.exe	35
PID 756 wrote to memory of 2808	756	cmd.exe	37
PID 756 wrote to memory of 2808	756	cmd.exe	37
PID 756 wrote to memory of 2808	756	cmd.exe	37
PID 756 wrote to memory of 2816	756	cmd.exe	38
PID 756 wrote to memory of 2816	756	cmd.exe	38
PID 756 wrote to memory of 2816	756	cmd.exe	38
PID 756 wrote to memory of 2744	756	cmd.exe	39
PID 756 wrote to memory of 2744	756	cmd.exe	39
PID 756 wrote to memory of 2744	756	cmd.exe	39

C:\Users\Admin\AppData\Local\Temp\Echo test.exe
"C:\Users\Admin\AppData\Local\Temp\Echo test.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\PortServerhostSvc\0u1xIFn5uBTahgPweE61XDW6gni0pA9hGvjOu.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2464
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\PortServerhostSvc\deeiCKZkZiO4AO25b.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2780
  - - C:\PortServerhostSvc\ChainComponentBroker.exe
      "C:\PortServerhostSvc/ChainComponentBroker.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3000
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\2e16WBON6E.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:756
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:2808
      - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        6⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:2816
      - C:\Users\Public\cmd.exe
        
        "C:\Users\Public\cmd.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:2744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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\deeiCKZkZiO4AO25b.bat

Filesize
88B

MD5
c8423ea58aa138504ea50ad34e8dcd74

SHA1
f3054ba306c1605084d4c4ac6b213b3130061d85

SHA256
a02c0e705931f16ed8c56c6797eab6f0a1f14fbc4237f529244278b3c117feae

SHA512
7151a7f841b05c0a1d1f48f176416ee8988508bee65f9253a9973284ab83cfdf2898ade5979bd30e5a80e2fe41cfc849ebdc8fa0b526be9369b50d32ab4d321b

Download Submit
C:\Users\Admin\AppData\Local\Temp\2e16WBON6E.bat

Filesize
151B

MD5
6c6899c1e5bc45564788c77676f5e00f

SHA1
413d4da4a4b51b195fcb1b5d66849dab758ae4a0

SHA256
ff3aaad0b853c87fa5ba4cb82a813c5b89badb4f28b0d72766cdcff08a720882

SHA512
3f594cc26f96c491b929c3f050f9568cc2c0ed6a5a315e3ac182b60646fffe39b77442f7d4e98e75e051c6effe93913cb1326b12453c09dfd472f6a2336330ed

Download Submit
\PortServerhostSvc\ChainComponentBroker.exe

Filesize
3.5MB

MD5
748b7d9fafaffefe123f11305dd0383b

SHA1
9e94086fce6fc65a72e2f339cb5cffeb3545390c

SHA256
8c9eb584cec3f2640cbdb865cdbb38413f63e7d1485d41bde77bc56624b00890

SHA512
4ab9d407d0d8f5e8ab6c9f8a802fedbfe5b49eccc590e52495dbb1ee0f948b65c7bc3aefbc94c6a500c22453114a423404e9ce00b74642d8c9314d6c032e9354

Download Submit
memory/2744-76-0x0000000000FE0000-0x000000000136C000-memory.dmp

Filesize
3.5MB

Download
memory/3000-35-0x00000000005B0000-0x00000000005C6000-memory.dmp

Filesize
88KB

Download
memory/3000-39-0x00000000004E0000-0x00000000004EE000-memory.dmp

Filesize
56KB

Download
memory/3000-21-0x00000000003A0000-0x00000000003B0000-memory.dmp

Filesize
64KB

Download
memory/3000-23-0x00000000004C0000-0x00000000004D8000-memory.dmp

Filesize
96KB

Download
memory/3000-25-0x00000000003B0000-0x00000000003C0000-memory.dmp

Filesize
64KB

Download
memory/3000-27-0x00000000003F0000-0x0000000000400000-memory.dmp

Filesize
64KB

Download
memory/3000-29-0x00000000004A0000-0x00000000004AE000-memory.dmp

Filesize
56KB

Download
memory/3000-31-0x0000000000590000-0x00000000005A2000-memory.dmp

Filesize
72KB

Download
memory/3000-33-0x00000000004B0000-0x00000000004C0000-memory.dmp

Filesize
64KB

Download
memory/3000-17-0x0000000000390000-0x000000000039E000-memory.dmp

Filesize
56KB

Download
memory/3000-37-0x00000000005D0000-0x00000000005E2000-memory.dmp

Filesize
72KB

Download
memory/3000-19-0x0000000000480000-0x000000000049C000-memory.dmp

Filesize
112KB

Download
memory/3000-41-0x00000000004F0000-0x0000000000500000-memory.dmp

Filesize
64KB

Download
memory/3000-43-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3000-45-0x0000000000C00000-0x0000000000C5A000-memory.dmp

Filesize
360KB

Download
memory/3000-47-0x0000000000B20000-0x0000000000B2E000-memory.dmp

Filesize
56KB

Download
memory/3000-49-0x0000000000B30000-0x0000000000B40000-memory.dmp

Filesize
64KB

Download
memory/3000-51-0x0000000000B40000-0x0000000000B4E000-memory.dmp

Filesize
56KB

Download
memory/3000-53-0x0000000000C60000-0x0000000000C78000-memory.dmp

Filesize
96KB

Download
memory/3000-55-0x0000000000B50000-0x0000000000B5C000-memory.dmp

Filesize
48KB

Download
memory/3000-57-0x000000001ACD0000-0x000000001AD1E000-memory.dmp

Filesize
312KB

Download
memory/3000-15-0x00000000003C0000-0x00000000003E6000-memory.dmp

Filesize
152KB

Download
memory/3000-13-0x0000000000E30000-0x00000000011BC000-memory.dmp

Filesize
3.5MB

Download