dcrat | 4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9

Analysis

max time kernel
120s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20-12-2024 20:16

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General

Target

517d21cbe45c2a88930aa345c2a5c36b.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
2820	ChainFontruntimeCrt.exe
2628	dllhost.exe

Loads dropped DLL 2 IoCs

pid	Process
2244	cmd.exe
2244	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 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\de\5940a34987c991	ChainFontruntimeCrt.exe
File created	C:\Program Files\VideoLAN\VLC\conhost.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files\VideoLAN\VLC\088424020bedd6	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\de\dllhost.exe	ChainFontruntimeCrt.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\BitLockerDiscoveryVolumeContents\services.exe	ChainFontruntimeCrt.exe
File opened for modification	C:\Windows\BitLockerDiscoveryVolumeContents\services.exe	ChainFontruntimeCrt.exe
File created	C:\Windows\BitLockerDiscoveryVolumeContents\c5b4cb5e9653cc	ChainFontruntimeCrt.exe
File created	C:\Windows\winsxs\amd64_microsoft-windows-n..ction-adm.resources_31bf3856ad364e35_6.1.7600.16385_es-es_7f5b10be3b86d813\dwm.exe	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	517d21cbe45c2a88930aa345c2a5c36b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe
2820	ChainFontruntimeCrt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2628	dllhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	ChainFontruntimeCrt.exe
Token: SeDebugPrivilege	2628	dllhost.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2188	2136	517d21cbe45c2a88930aa345c2a5c36b.exe	28
PID 2136 wrote to memory of 2188	2136	517d21cbe45c2a88930aa345c2a5c36b.exe	28
PID 2136 wrote to memory of 2188	2136	517d21cbe45c2a88930aa345c2a5c36b.exe	28
PID 2136 wrote to memory of 2188	2136	517d21cbe45c2a88930aa345c2a5c36b.exe	28
PID 2188 wrote to memory of 2244	2188	WScript.exe	29
PID 2188 wrote to memory of 2244	2188	WScript.exe	29
PID 2188 wrote to memory of 2244	2188	WScript.exe	29
PID 2188 wrote to memory of 2244	2188	WScript.exe	29
PID 2244 wrote to memory of 2820	2244	cmd.exe	31
PID 2244 wrote to memory of 2820	2244	cmd.exe	31
PID 2244 wrote to memory of 2820	2244	cmd.exe	31
PID 2244 wrote to memory of 2820	2244	cmd.exe	31
PID 2820 wrote to memory of 2640	2820	ChainFontruntimeCrt.exe	32
PID 2820 wrote to memory of 2640	2820	ChainFontruntimeCrt.exe	32
PID 2820 wrote to memory of 2640	2820	ChainFontruntimeCrt.exe	32
PID 2640 wrote to memory of 2716	2640	cmd.exe	34
PID 2640 wrote to memory of 2716	2640	cmd.exe	34
PID 2640 wrote to memory of 2716	2640	cmd.exe	34
PID 2640 wrote to memory of 2792	2640	cmd.exe	35
PID 2640 wrote to memory of 2792	2640	cmd.exe	35
PID 2640 wrote to memory of 2792	2640	cmd.exe	35
PID 2640 wrote to memory of 2628	2640	cmd.exe	36
PID 2640 wrote to memory of 2628	2640	cmd.exe	36
PID 2640 wrote to memory of 2628	2640	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\517d21cbe45c2a88930aa345c2a5c36b.exe
"C:\Users\Admin\AppData\Local\Temp\517d21cbe45c2a88930aa345c2a5c36b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2136
- 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:2188
- - 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:2244
  - - 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:2820
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\FRDUb5avyZ.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2640
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:2716
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:2792
      - C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\de\dllhost.exe
        
        "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\de\dllhost.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:2628

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

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

Replay Monitor

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Downloads

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\FRDUb5avyZ.bat

Filesize
259B

MD5
77e59e04f6341121019c0ecf81639a74

SHA1
69c767746ad54d8c7f7c855e897ebb3fed998f66

SHA256
d72d4e0dd31764c4e176855b85ce00f67ba0874886bb0f3f0abac0537b7a0179

SHA512
d91dff089b25945b53161cc6a632ae1b37f2b02393039eaddac241c1a72aafd10c80648ecc861d2e2ceb20cbef2e530d8ecbad338b0ebb372041f21425583bb5

Download Submit
\ChainagentComponent\ChainFontruntimeCrt.exe

Filesize
1.9MB

MD5
64105cb19ac25a6275c7d929937090a0

SHA1
4b0ab4a6fa17feed05e183029f3a240d7860437d

SHA256
cb2f1aca28fcb0a43b1a256a1728a087efed3d8144f0657c3dd5f4d5a0a6898c

SHA512
7152d54def3ff633787549e7353330b949bb51af3753b77a52b6fa24465ce635c985cbe28d7fc8ecbe4fe4e7b0b39933f79ad4e56817aac45f8abffc0918e4b6

Download Submit
memory/2628-46-0x0000000000DC0000-0x0000000000FBA000-memory.dmp

Filesize
2.0MB

Download
memory/2820-19-0x0000000000350000-0x0000000000368000-memory.dmp

Filesize
96KB

Download
memory/2820-17-0x0000000000330000-0x000000000034C000-memory.dmp

Filesize
112KB

Download
memory/2820-21-0x0000000000310000-0x000000000031E000-memory.dmp

Filesize
56KB

Download
memory/2820-23-0x0000000000320000-0x000000000032E000-memory.dmp

Filesize
56KB

Download
memory/2820-25-0x0000000000480000-0x000000000048E000-memory.dmp

Filesize
56KB

Download
memory/2820-27-0x0000000000490000-0x000000000049C000-memory.dmp

Filesize
48KB

Download
memory/2820-15-0x0000000000300000-0x000000000030E000-memory.dmp

Filesize
56KB

Download
memory/2820-13-0x00000000008A0000-0x0000000000A9A000-memory.dmp

Filesize
2.0MB

Download