dcrat | 24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc

General

Target

1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
Size

775KB
MD5

0ed1f9cb842483e03e36cee538678ffd
SHA1

1d13a84aa671b75f66f4c7fce8339619291d4a43
SHA256

24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc
SHA512

78cb214db0ecbc532a50fc1344a138125e0031485c004e95bc21064165f9fd667fa582cd5196a6e1b4276b6dd7fa1d23dfabfe0c58b0d93fbf8e5329b064a809
SSDEEP

12288:FFg6HIZxWaga+z9e9qJeyLVqlUhqgPXdU2ypi0w8ncqXuvVw4heSNSzLz/:FIrr+h0qJeiqlGVUskcz9w4jI3b

Score

10^/10

dcrat discovery execution 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

DCRat payload 5 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral1/memory/1704-22-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat
behavioral1/memory/1704-20-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat
behavioral1/memory/1704-18-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat
behavioral1/memory/1704-14-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat
behavioral1/memory/1704-12-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

1468 powershell.exe
Executes dropped EXE 1 IoCs

Processes:

dwm.exe

pid process

656 dwm.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2240 cmd.exe

pid	process
1468	powershell.exe

pid	process
656	dwm.exe

pid	process
2240	cmd.exe

Drops file in System32 directory 5 IoCs

Processes:

1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

description	ioc	process
File created	C:\Windows\SysWOW64\api-ms-win-crt-stdio-l1-1-0\6cb0b6c459d5d3455a3da700e713f2e2529862ff	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
File created	C:\Windows\SysWOW64\odbcconf\lsass.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
File opened for modification	C:\Windows\SysWOW64\odbcconf\lsass.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
File created	C:\Windows\SysWOW64\odbcconf\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
File created	C:\Windows\SysWOW64\api-ms-win-crt-stdio-l1-1-0\dwm.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

description	pid	process	target process
PID 1740 set thread context of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

Drops file in Program Files directory 2 IoCs

Processes:

1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

description	ioc	process
File created	C:\Program Files\Windows NT\Accessories\it-IT\smss.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
File created	C:\Program Files\Windows NT\Accessories\it-IT\69ddcba757bf72f7d36c464c71f42baab150b2b9	1d13a84aa671b75f66f4c7fce8339619291d4a43.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 11 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

Processes:

1d13a84aa671b75f66f4c7fce8339619291d4a43.exepowershell.exeschtasks.exeschtasks.execmd.exechcp.comPING.EXE1d13a84aa671b75f66f4c7fce8339619291d4a43.exeschtasks.exeschtasks.exedwm.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dwm.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

Processes:

PING.EXE

pid process

1352 PING.EXE
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1352 PING.EXE
Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

1408 schtasks.exe
2636 schtasks.exe
2488 schtasks.exe
912 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

pid process

1468 powershell.exe
1704 1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exe1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

description pid process

Token: SeDebugPrivilege 1468 powershell.exe
Token: SeDebugPrivilege 1704 1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

pid	process
1352	PING.EXE

pid	process
1352	PING.EXE

pid	process
1408	schtasks.exe
2636	schtasks.exe
2488	schtasks.exe
912	schtasks.exe

pid	process
1468	powershell.exe
1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

description	pid	process
Token: SeDebugPrivilege	1468	powershell.exe
Token: SeDebugPrivilege	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe

Suspicious use of WriteProcessMemory 45 IoCs

Processes:

1d13a84aa671b75f66f4c7fce8339619291d4a43.exe1d13a84aa671b75f66f4c7fce8339619291d4a43.execmd.exe

description	pid	process	target process
PID 1740 wrote to memory of 1468	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	powershell.exe
PID 1740 wrote to memory of 1468	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	powershell.exe
PID 1740 wrote to memory of 1468	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	powershell.exe
PID 1740 wrote to memory of 1468	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	powershell.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1740 wrote to memory of 1704	1740	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
PID 1704 wrote to memory of 1408	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 1408	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 1408	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 1408	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2636	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2636	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2636	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2636	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2488	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2488	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2488	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2488	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 912	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 912	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 912	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 912	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	schtasks.exe
PID 1704 wrote to memory of 2240	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	cmd.exe
PID 1704 wrote to memory of 2240	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	cmd.exe
PID 1704 wrote to memory of 2240	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	cmd.exe
PID 1704 wrote to memory of 2240	1704	1d13a84aa671b75f66f4c7fce8339619291d4a43.exe	cmd.exe
PID 2240 wrote to memory of 680	2240	cmd.exe	chcp.com
PID 2240 wrote to memory of 680	2240	cmd.exe	chcp.com
PID 2240 wrote to memory of 680	2240	cmd.exe	chcp.com
PID 2240 wrote to memory of 680	2240	cmd.exe	chcp.com
PID 2240 wrote to memory of 1352	2240	cmd.exe	PING.EXE
PID 2240 wrote to memory of 1352	2240	cmd.exe	PING.EXE
PID 2240 wrote to memory of 1352	2240	cmd.exe	PING.EXE
PID 2240 wrote to memory of 1352	2240	cmd.exe	PING.EXE
PID 2240 wrote to memory of 656	2240	cmd.exe	dwm.exe
PID 2240 wrote to memory of 656	2240	cmd.exe	dwm.exe
PID 2240 wrote to memory of 656	2240	cmd.exe	dwm.exe
PID 2240 wrote to memory of 656	2240	cmd.exe	dwm.exe

C:\Users\Admin\AppData\Local\Temp\1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
"C:\Users\Admin\AppData\Local\Temp\1d13a84aa671b75f66f4c7fce8339619291d4a43.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\1d13a84aa671b75f66f4c7fce8339619291d4a43.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1468
- C:\Users\Admin\AppData\Local\Temp\1d13a84aa671b75f66f4c7fce8339619291d4a43.exe
  "C:\Users\Admin\AppData\Local\Temp\1d13a84aa671b75f66f4c7fce8339619291d4a43.exe"
  2⤵
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1704
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\odbcconf\lsass.exe'" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1408
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\480d7142-91a3-11ef-b9f6-6e5a89f5a3c7\sppsvc.exe'" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2636
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Windows NT\Accessories\it-IT\smss.exe'" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2488
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\System32\api-ms-win-crt-stdio-l1-1-0\dwm.exe'" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:912
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\XWlpt9ANcw.bat"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2240
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:680
  - - C:\Windows\SysWOW64\PING.EXE
      ping -n 5 localhost
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1352
  - - C:\Windows\SysWOW64\api-ms-win-crt-stdio-l1-1-0\dwm.exe
      "C:\Windows\System32\api-ms-win-crt-stdio-l1-1-0\dwm.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\XWlpt9ANcw.bat

Filesize
221B

MD5
36c954531fe8921fe19dd738866763f2

SHA1
a0eff0ae5a0569da241c07f0fde1cbf8b6aea605

SHA256
9ce4eeb36e66e16991cd1f62a03c34f08d96e1e47a9ad23b8c59ce797da74aec

SHA512
22f14c671ff8f1007518fa7f286b34e129d0c57d360b51e53527883fe63d194c1003c0a5d0c63fb0fbed85410d6ae0834ca919315324791a1ff4a8a2cb89f299

Download Submit
\Windows\SysWOW64\api-ms-win-crt-stdio-l1-1-0\dwm.exe

Filesize
775KB

MD5
0ed1f9cb842483e03e36cee538678ffd

SHA1
1d13a84aa671b75f66f4c7fce8339619291d4a43

SHA256
24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc

SHA512
78cb214db0ecbc532a50fc1344a138125e0031485c004e95bc21064165f9fd667fa582cd5196a6e1b4276b6dd7fa1d23dfabfe0c58b0d93fbf8e5329b064a809

Download Submit
memory/656-47-0x0000000001080000-0x0000000001144000-memory.dmp

Filesize
784KB

Download
memory/1704-27-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1704-12-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1704-42-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1704-28-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1704-23-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1704-9-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1704-22-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1704-20-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1704-18-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1704-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1704-14-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1704-10-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1740-4-0x00000000748AE000-0x00000000748AF000-memory.dmp

Filesize
4KB

Download
memory/1740-7-0x0000000005210000-0x0000000005290000-memory.dmp

Filesize
512KB

Download
memory/1740-24-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1740-0-0x00000000748AE000-0x00000000748AF000-memory.dmp

Filesize
4KB

Download
memory/1740-6-0x0000000005170000-0x0000000005210000-memory.dmp

Filesize
640KB

Download
memory/1740-5-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1740-3-0x0000000000500000-0x000000000050A000-memory.dmp

Filesize
40KB

Download
memory/1740-2-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1740-1-0x0000000000850000-0x0000000000914000-memory.dmp

Filesize
784KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads