dcrat | d333bb196b4055cd752e86834b3b178603edb81c18f8bf46a3332916908481c5

Analysis

max time kernel
94s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 01:20

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General

Target

4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe
Size

2.3MB
MD5

517d21cbe45c2a88930aa345c2a5c36b
SHA1

f8c2b259ed15eb455fc345f54a9ef9b0aace552c
SHA256

4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9
SHA512

b912bf7ea3fc0e929890ce6048e89ab797b0ebf4b54e87989bdf4f2eb06cb68e1accd52200105c1079336ba57525aa200cd48c769e24ce1827906948d6f28d3f
SSDEEP

49152:IBJQcFZTdUJWxOOZPHst87uOLOkMRxJgSrSmMsce:yOczpGWdZPHu9WuRx9rrJT

Score

10^/10

dcrat discovery infostealer rat spyware stealer

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
2808	ChainFontruntimeCrt.exe
404	services.exe

Loads dropped DLL 2 IoCs

pid	Process
824	cmd.exe
824	cmd.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Photo Viewer\dllhost.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\5940a34987c991	ChainFontruntimeCrt.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Setup\State\OSPPSVC.exe	ChainFontruntimeCrt.exe
File created	C:\Windows\Setup\State\1610b97d3ab4a7	ChainFontruntimeCrt.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	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.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
2096	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2096	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe
2808	ChainFontruntimeCrt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
404	services.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2808	ChainFontruntimeCrt.exe
Token: SeDebugPrivilege	404	services.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 376 wrote to memory of 2320	376	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe	30
PID 376 wrote to memory of 2320	376	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe	30
PID 376 wrote to memory of 2320	376	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe	30
PID 376 wrote to memory of 2320	376	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe	30
PID 2320 wrote to memory of 824	2320	WScript.exe	31
PID 2320 wrote to memory of 824	2320	WScript.exe	31
PID 2320 wrote to memory of 824	2320	WScript.exe	31
PID 2320 wrote to memory of 824	2320	WScript.exe	31
PID 824 wrote to memory of 2808	824	cmd.exe	33
PID 824 wrote to memory of 2808	824	cmd.exe	33
PID 824 wrote to memory of 2808	824	cmd.exe	33
PID 824 wrote to memory of 2808	824	cmd.exe	33
PID 2808 wrote to memory of 2616	2808	ChainFontruntimeCrt.exe	34
PID 2808 wrote to memory of 2616	2808	ChainFontruntimeCrt.exe	34
PID 2808 wrote to memory of 2616	2808	ChainFontruntimeCrt.exe	34
PID 2616 wrote to memory of 2068	2616	cmd.exe	36
PID 2616 wrote to memory of 2068	2616	cmd.exe	36
PID 2616 wrote to memory of 2068	2616	cmd.exe	36
PID 2616 wrote to memory of 2096	2616	cmd.exe	37
PID 2616 wrote to memory of 2096	2616	cmd.exe	37
PID 2616 wrote to memory of 2096	2616	cmd.exe	37
PID 2616 wrote to memory of 404	2616	cmd.exe	38
PID 2616 wrote to memory of 404	2616	cmd.exe	38
PID 2616 wrote to memory of 404	2616	cmd.exe	38

C:\Users\Admin\AppData\Local\Temp\4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe
"C:\Users\Admin\AppData\Local\Temp\4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:376
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ChainagentComponent\PWC9d9T0TgxIE17d8kEvKaBzSy5sS4bSkqUfKmaENJQQSQ4ECN.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2320
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\ChainagentComponent\q14QT1c6LK4xpgG0MrqndXYweJYHdEecuYXEv1hUkMNQcqj9DhhAaajtNw.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:824
  - - C:\ChainagentComponent\ChainFontruntimeCrt.exe
      "C:\ChainagentComponent/ChainFontruntimeCrt.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:2808
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\EKsYy0yhsZ.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2616
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:2068
      - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        6⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:2096
      - C:\Users\Admin\Start Menu\services.exe
        
        "C:\Users\Admin\Start Menu\services.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

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

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ChainagentComponent\ChainFontruntimeCrt.exe

Filesize
1.9MB

MD5
64105cb19ac25a6275c7d929937090a0

SHA1
4b0ab4a6fa17feed05e183029f3a240d7860437d

SHA256
cb2f1aca28fcb0a43b1a256a1728a087efed3d8144f0657c3dd5f4d5a0a6898c

SHA512
7152d54def3ff633787549e7353330b949bb51af3753b77a52b6fa24465ce635c985cbe28d7fc8ecbe4fe4e7b0b39933f79ad4e56817aac45f8abffc0918e4b6

Download Submit
C:\ChainagentComponent\PWC9d9T0TgxIE17d8kEvKaBzSy5sS4bSkqUfKmaENJQQSQ4ECN.vbe

Filesize
252B

MD5
82ea3a77040d884456b51fc284d887a3

SHA1
e5caba4399ce043a758f78840d2323ffce3d41b8

SHA256
345cb6db98f74263a91a2dabde35f4d2af5bbb909f1904d7b9b1d5d75864a2d8

SHA512
79147ccbd6bafbeec3d7d21fc0e3f0f85cb340e54263b2925b42bbda539d9f5b921d8e9dc950e51a7a1da942ae75988a92470dac6c6e73fdbef76047eefafd91

Download Submit
C:\ChainagentComponent\q14QT1c6LK4xpgG0MrqndXYweJYHdEecuYXEv1hUkMNQcqj9DhhAaajtNw.bat

Filesize
77B

MD5
21c1a26270a6ac361060ef54b50810bc

SHA1
11d3abd6d008458760130e6ffcc61d812a976094

SHA256
4e5619470e12d0f050c33e88f7075267812240fcf2f38e8732486eea3967ac40

SHA512
42fa950a07f5edd1c48f6523395ed1816ee1b31eb9d8b905e3c92c31dec692465862bff4a840c845d879b1447593ffeff5924fd0ab4206061df257c2dc980ae8

Download Submit
C:\Users\Admin\AppData\Local\Temp\EKsYy0yhsZ.bat

Filesize
166B

MD5
4238968a2aa42d16de641db61746ff28

SHA1
edecfdfb4a057a1d9aa2a59ac3558954502c4b21

SHA256
0f4582293370358ca9370df0dc1e6e2b56c65e8e66e216cec9db6a1e57a9f568

SHA512
bcff0e917a26289574e8f11757bc2bbcd4d999ccbb6f7c7ace7fd85e9756d3eee075bc779cbd75713e9f6ff43d5fab685a05efeb83b8bb1fa5be522b3929e6d3

Download Submit
memory/404-46-0x0000000001370000-0x000000000156A000-memory.dmp

Filesize
2.0MB

Download
memory/2808-19-0x0000000000440000-0x0000000000458000-memory.dmp

Filesize
96KB

Download
memory/2808-17-0x0000000000420000-0x000000000043C000-memory.dmp

Filesize
112KB

Download
memory/2808-21-0x0000000000410000-0x000000000041E000-memory.dmp

Filesize
56KB

Download
memory/2808-23-0x0000000000460000-0x000000000046E000-memory.dmp

Filesize
56KB

Download
memory/2808-25-0x0000000000470000-0x000000000047E000-memory.dmp

Filesize
56KB

Download
memory/2808-27-0x0000000000490000-0x000000000049C000-memory.dmp

Filesize
48KB

Download
memory/2808-15-0x00000000003F0000-0x00000000003FE000-memory.dmp

Filesize
56KB

Download
memory/2808-13-0x0000000000990000-0x0000000000B8A000-memory.dmp

Filesize
2.0MB

Download