dcrat | 4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9

Analysis

max time kernel
148s
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
21-12-2024 02:30

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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

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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	ChainFontruntimeCrt.exe

Executes dropped EXE 2 IoCs

pid	Process
4324	ChainFontruntimeCrt.exe
4484	upfc.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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Internet Explorer\SIGNUP\StartMenuExperienceHost.exe	ChainFontruntimeCrt.exe
File opened for modification	C:\Program Files (x86)\Internet Explorer\SIGNUP\StartMenuExperienceHost.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\es-ES\upfc.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\es-ES\ea1d8f6d871115	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\EBWebView\27d1bcfc3c54e0	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Internet Explorer\SIGNUP\55b276f4edf653	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\EBWebView\System.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files\Windows Security\BrowserCore\en-US\explorer.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files\Windows Security\BrowserCore\en-US\7a0fd90576e088	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	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.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-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe
Key created	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings	ChainFontruntimeCrt.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe
4324	ChainFontruntimeCrt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4484	upfc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4324	ChainFontruntimeCrt.exe
Token: SeDebugPrivilege	4484	upfc.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1588 wrote to memory of 3556	1588	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe	82
PID 1588 wrote to memory of 3556	1588	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe	82
PID 1588 wrote to memory of 3556	1588	4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe	82
PID 3556 wrote to memory of 1980	3556	WScript.exe	83
PID 3556 wrote to memory of 1980	3556	WScript.exe	83
PID 3556 wrote to memory of 1980	3556	WScript.exe	83
PID 1980 wrote to memory of 4324	1980	cmd.exe	85
PID 1980 wrote to memory of 4324	1980	cmd.exe	85
PID 4324 wrote to memory of 2064	4324	ChainFontruntimeCrt.exe	87
PID 4324 wrote to memory of 2064	4324	ChainFontruntimeCrt.exe	87
PID 2064 wrote to memory of 2432	2064	cmd.exe	89
PID 2064 wrote to memory of 2432	2064	cmd.exe	89
PID 2064 wrote to memory of 3296	2064	cmd.exe	90
PID 2064 wrote to memory of 3296	2064	cmd.exe	90
PID 2064 wrote to memory of 4484	2064	cmd.exe	92
PID 2064 wrote to memory of 4484	2064	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe
"C:\Users\Admin\AppData\Local\Temp\4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1588
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ChainagentComponent\PWC9d9T0TgxIE17d8kEvKaBzSy5sS4bSkqUfKmaENJQQSQ4ECN.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3556
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\ChainagentComponent\q14QT1c6LK4xpgG0MrqndXYweJYHdEecuYXEv1hUkMNQcqj9DhhAaajtNw.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1980
  - - C:\ChainagentComponent\ChainFontruntimeCrt.exe
      "C:\ChainagentComponent/ChainFontruntimeCrt.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Program Files directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4324
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\cc1EAlJblh.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2064
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:2432
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:3296
      - C:\Program Files (x86)\Windows Photo Viewer\es-ES\upfc.exe
        
        "C:\Program Files (x86)\Windows Photo Viewer\es-ES\upfc.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:4484

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

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\cc1EAlJblh.bat

Filesize
234B

MD5
1b73abc1b23a802161cc15e9aa6f9696

SHA1
46f4adc359fe394a93f8e2b8e7b14278fd5e3c06

SHA256
8e03adebcfc41d59ffe2bc329659560604c35fa8a39534c41170a179601dd0a5

SHA512
1530ec7f457783157abf598587671bf1496a1de3497fe384a6712e876eb62c9e69e852b7e70218882ff446f7dc81a958324c7d034deab716a42a02b78800fd5e

Download Submit
memory/4324-20-0x000000001B5A0000-0x000000001B5B8000-memory.dmp

Filesize
96KB

Download
memory/4324-15-0x0000000002AE0000-0x0000000002AEE000-memory.dmp

Filesize
56KB

Download
memory/4324-17-0x000000001B580000-0x000000001B59C000-memory.dmp

Filesize
112KB

Download
memory/4324-18-0x000000001BA20000-0x000000001BA70000-memory.dmp

Filesize
320KB

Download
memory/4324-13-0x0000000000750000-0x000000000094A000-memory.dmp

Filesize
2.0MB

Download
memory/4324-22-0x0000000002B00000-0x0000000002B0E000-memory.dmp

Filesize
56KB

Download
memory/4324-24-0x0000000002B10000-0x0000000002B1E000-memory.dmp

Filesize
56KB

Download
memory/4324-26-0x000000001B5C0000-0x000000001B5CE000-memory.dmp

Filesize
56KB

Download
memory/4324-28-0x000000001B5D0000-0x000000001B5DC000-memory.dmp

Filesize
48KB

Download
memory/4324-45-0x000000001BA70000-0x000000001BB3D000-memory.dmp

Filesize
820KB

Download
memory/4324-12-0x00007FFA28463000-0x00007FFA28465000-memory.dmp

Filesize
8KB

Download
memory/4484-57-0x000000001BD20000-0x000000001BDED000-memory.dmp

Filesize
820KB

Download