dcrat | db57de1bf0b133303c2325117a527f1586e4bf6af56219391a17095efb09cc76

General

Target

8282EA0066E14F2E7CAF51B7A7D50DC1.exe
Size

1.0MB
MD5

8282ea0066e14f2e7caf51b7a7d50dc1
SHA1

83c03517bb11c4ef01ced0b8df76cb35acbf4fdd
SHA256

db57de1bf0b133303c2325117a527f1586e4bf6af56219391a17095efb09cc76
SHA512

b48e2b9c226f57c50b5e58d716a906e9753f254136697e3e32c5f6aba2c6cc0a3175b0b290630949ddb4229a8eda53e5b62d03c969f5ef187963302ecc9e6841

Score

10^/10

dcrat 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 Payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x000100000001ab50-121.dat	dcrat
behavioral2/files/0x000100000001ab50-122.dat	dcrat
behavioral2/files/0x000100000001ab61-137.dat	dcrat
behavioral2/files/0x000100000001ab61-136.dat	dcrat

Executes dropped EXE 2 IoCs

pid	Process
2300	fontruntime.exe
184	ShellExperienceHost.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
14	ipinfo.io
15	ipinfo.io

Drops file in System32 directory 7 IoCs

description	ioc	Process
File created	C:\Windows\System32\msrahc\dllhost.exe	fontruntime.exe
File opened for modification	C:\Windows\System32\msrahc\dllhost.exe	fontruntime.exe
File created	C:\Windows\System32\msrahc\5940a34987c99120d96dace90a3f93f329dcad63	fontruntime.exe
File created	C:\Windows\System32\chgport\SppExtComObj.exe	fontruntime.exe
File created	C:\Windows\System32\chgport\e1ef82546f0b02b7e974f28047f3788b1128cce1	fontruntime.exe
File created	C:\Windows\System32\NgcProCsp\slui.exe	fontruntime.exe
File created	C:\Windows\System32\NgcProCsp\a29f4157103644af5692ebfddf35f6dff4e237da	fontruntime.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 5 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
2264	schtasks.exe
3328	schtasks.exe
3868	schtasks.exe
2308	schtasks.exe
3160	schtasks.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	8282EA0066E14F2E7CAF51B7A7D50DC1.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	fontruntime.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2948	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2300	fontruntime.exe
2300	fontruntime.exe
2300	fontruntime.exe
184	ShellExperienceHost.exe
184	ShellExperienceHost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
184	ShellExperienceHost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2300	fontruntime.exe
Token: SeDebugPrivilege	184	ShellExperienceHost.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 808 wrote to memory of 68	808	8282EA0066E14F2E7CAF51B7A7D50DC1.exe	75
PID 808 wrote to memory of 68	808	8282EA0066E14F2E7CAF51B7A7D50DC1.exe	75
PID 808 wrote to memory of 68	808	8282EA0066E14F2E7CAF51B7A7D50DC1.exe	75
PID 68 wrote to memory of 2580	68	WScript.exe	76
PID 68 wrote to memory of 2580	68	WScript.exe	76
PID 68 wrote to memory of 2580	68	WScript.exe	76
PID 2580 wrote to memory of 2300	2580	cmd.exe	78
PID 2580 wrote to memory of 2300	2580	cmd.exe	78
PID 2300 wrote to memory of 2264	2300	fontruntime.exe	81
PID 2300 wrote to memory of 2264	2300	fontruntime.exe	81
PID 2300 wrote to memory of 3328	2300	fontruntime.exe	83
PID 2300 wrote to memory of 3328	2300	fontruntime.exe	83
PID 2300 wrote to memory of 3868	2300	fontruntime.exe	85
PID 2300 wrote to memory of 3868	2300	fontruntime.exe	85
PID 2300 wrote to memory of 2308	2300	fontruntime.exe	87
PID 2300 wrote to memory of 2308	2300	fontruntime.exe	87
PID 2300 wrote to memory of 3160	2300	fontruntime.exe	89
PID 2300 wrote to memory of 3160	2300	fontruntime.exe	89
PID 2300 wrote to memory of 1008	2300	fontruntime.exe	91
PID 2300 wrote to memory of 1008	2300	fontruntime.exe	91
PID 1008 wrote to memory of 1288	1008	cmd.exe	93
PID 1008 wrote to memory of 1288	1008	cmd.exe	93
PID 1008 wrote to memory of 2948	1008	cmd.exe	94
PID 1008 wrote to memory of 2948	1008	cmd.exe	94
PID 1008 wrote to memory of 184	1008	cmd.exe	96
PID 1008 wrote to memory of 184	1008	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\8282EA0066E14F2E7CAF51B7A7D50DC1.exe
"C:\Users\Admin\AppData\Local\Temp\8282EA0066E14F2E7CAF51B7A7D50DC1.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:808
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\fontruntime\W54cK365JLW2iwfNl.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:68
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\fontruntime\R8YG6c.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2580
  - - C:\fontruntime\fontruntime.exe
      "C:\fontruntime\fontruntime.exe"
      4⤵
      Executes dropped EXE
      Drops file in System32 directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2300
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\msrahc\dllhost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2264
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\System32\chgport\SppExtComObj.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:3328
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "slui" /sc ONLOGON /tr "'C:\Windows\System32\NgcProCsp\slui.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:3868
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\fontruntime\fontdrvhost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2308
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "ShellExperienceHost" /sc ONLOGON /tr "'C:\Boot\Fonts\ShellExperienceHost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:3160
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\fontruntime\tcqWpE8T6a.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1008
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:1288
      - C:\Windows\system32\PING.EXE
        
        ping -n 5 localhost
        6⤵
        Runs ping.exe
        
        PID:2948
      - C:\Boot\Fonts\ShellExperienceHost.exe
        
        "C:\Boot\Fonts\ShellExperienceHost.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:184

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/184-140-0x000001B8E8060000-0x000001B8E8062000-memory.dmp

Filesize
8KB

Download
memory/184-143-0x000001B8CDE90000-0x000001B8CDE91000-memory.dmp

Filesize
4KB

Download
memory/184-142-0x000001B8CDE60000-0x000001B8CDE64000-memory.dmp

Filesize
16KB

Download
memory/184-141-0x000001B8CDDF0000-0x000001B8CDDF5000-memory.dmp

Filesize
20KB

Download
memory/2300-125-0x0000021780060000-0x0000021780062000-memory.dmp

Filesize
8KB

Download
memory/2300-123-0x00000217FE080000-0x00000217FE081000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads