dcrat | 4b9cb0b6b953edda63999ddd41656c7c509cfb02298eaac8929010c29971cec9

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-12-2024 20:19

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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

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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	517d21cbe45c2a88930aa345c2a5c36b.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	ChainFontruntimeCrt.exe

Executes dropped EXE 2 IoCs

pid	Process
2712	ChainFontruntimeCrt.exe
1044	fontdrvhost.exe

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files\Mozilla Firefox\defaults\pref\SppExtComObj.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files\Windows Portable Devices\5b884080fd4f94	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Common Files\OfficeClickToRun.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files (x86)\Common Files\e6c9b481da804f	ChainFontruntimeCrt.exe
File created	C:\Program Files\Windows Sidebar\Gadgets\6cb0b6c459d5d3	ChainFontruntimeCrt.exe
File opened for modification	C:\Program Files\Mozilla Firefox\defaults\pref\SppExtComObj.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files\Mozilla Firefox\defaults\pref\e1ef82546f0b02	ChainFontruntimeCrt.exe
File created	C:\Program Files\Windows Portable Devices\fontdrvhost.exe	ChainFontruntimeCrt.exe
File created	C:\Program Files\Windows Sidebar\Gadgets\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

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	517d21cbe45c2a88930aa345c2a5c36b.exe
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	ChainFontruntimeCrt.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe
2712	ChainFontruntimeCrt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1044	fontdrvhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2712	ChainFontruntimeCrt.exe
Token: SeDebugPrivilege	1044	fontdrvhost.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3940 wrote to memory of 2056	3940	517d21cbe45c2a88930aa345c2a5c36b.exe	83
PID 3940 wrote to memory of 2056	3940	517d21cbe45c2a88930aa345c2a5c36b.exe	83
PID 3940 wrote to memory of 2056	3940	517d21cbe45c2a88930aa345c2a5c36b.exe	83
PID 2056 wrote to memory of 4048	2056	WScript.exe	84
PID 2056 wrote to memory of 4048	2056	WScript.exe	84
PID 2056 wrote to memory of 4048	2056	WScript.exe	84
PID 4048 wrote to memory of 2712	4048	cmd.exe	86
PID 4048 wrote to memory of 2712	4048	cmd.exe	86
PID 2712 wrote to memory of 1584	2712	ChainFontruntimeCrt.exe	87
PID 2712 wrote to memory of 1584	2712	ChainFontruntimeCrt.exe	87
PID 1584 wrote to memory of 3276	1584	cmd.exe	89
PID 1584 wrote to memory of 3276	1584	cmd.exe	89
PID 1584 wrote to memory of 5012	1584	cmd.exe	90
PID 1584 wrote to memory of 5012	1584	cmd.exe	90
PID 1584 wrote to memory of 1044	1584	cmd.exe	92
PID 1584 wrote to memory of 1044	1584	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\517d21cbe45c2a88930aa345c2a5c36b.exe
"C:\Users\Admin\AppData\Local\Temp\517d21cbe45c2a88930aa345c2a5c36b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3940
- 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:2056
- - 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:4048
  - - 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:2712
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\SU8S3gBqHz.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1584
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:3276
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:5012
      - C:\Program Files\Windows Portable Devices\fontdrvhost.exe
        
        "C:\Program Files\Windows Portable Devices\fontdrvhost.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:1044

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:\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\SU8S3gBqHz.bat

Filesize
233B

MD5
6c0741a3a8919d559fabc71ebd2fd557

SHA1
d14d1fc0d265fbc6bca59ae0f70dc251add8211a

SHA256
bba274247abb144458e3d43ed0334b22e5d4bd44d185d6d1ebf00249666ae3fb

SHA512
dfefe6fa43acfed973ab86b4731fa55c23e009cacaa6ec3dec6595fcbbd320be57e43af18eb5fecd079eb4967bee9e5ee6fa6c4f65d6c06cb4307e7f9744bd84

Download Submit
memory/1044-57-0x000000001C200000-0x000000001C2A9000-memory.dmp

Filesize
676KB

Download
memory/2712-20-0x000000001B7C0000-0x000000001B7D8000-memory.dmp

Filesize
96KB

Download
memory/2712-17-0x000000001B7A0000-0x000000001B7BC000-memory.dmp

Filesize
112KB

Download
memory/2712-18-0x000000001B840000-0x000000001B890000-memory.dmp

Filesize
320KB

Download
memory/2712-15-0x0000000002E40000-0x0000000002E4E000-memory.dmp

Filesize
56KB

Download
memory/2712-22-0x000000001B780000-0x000000001B78E000-memory.dmp

Filesize
56KB

Download
memory/2712-24-0x000000001B790000-0x000000001B79E000-memory.dmp

Filesize
56KB

Download
memory/2712-26-0x000000001B7E0000-0x000000001B7EE000-memory.dmp

Filesize
56KB

Download
memory/2712-28-0x000000001B7F0000-0x000000001B7FC000-memory.dmp

Filesize
48KB

Download
memory/2712-45-0x000000001C140000-0x000000001C1E9000-memory.dmp

Filesize
676KB

Download
memory/2712-13-0x0000000000A70000-0x0000000000C6A000-memory.dmp

Filesize
2.0MB

Download
memory/2712-12-0x00007FFC4B1C3000-0x00007FFC4B1C5000-memory.dmp

Filesize
8KB

Download