dcrat | 24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc

Analysis

max time kernel
118s
max time network
17s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
16-11-2024 02:15

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.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

resource	yara_rule
behavioral1/memory/2188-17-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat
behavioral1/memory/2188-19-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat
behavioral1/memory/2188-15-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat
behavioral1/memory/2188-11-0x0000000000400000-0x0000000000478000-memory.dmp	dcrat
behavioral1/memory/2188-10-0x0000000000400000-0x0000000000478000-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

pid	Process
2184	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
1384	csrss.exe

Loads dropped DLL 1 IoCs

pid	Process
2456	cmd.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\NlsLexicons0027\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe
File created	C:\Windows\SysWOW64\NlsLexicons0027\services.exe	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1956 set thread context of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30

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 10 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	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.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	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.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

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

pid	Process
2104	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2104	PING.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1032	schtasks.exe
1852	schtasks.exe
2124	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2184	powershell.exe
2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 2184	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	29
PID 1956 wrote to memory of 2184	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	29
PID 1956 wrote to memory of 2184	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	29
PID 1956 wrote to memory of 2184	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	29
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 1956 wrote to memory of 2188	1956	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	30
PID 2188 wrote to memory of 1032	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	33
PID 2188 wrote to memory of 1032	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	33
PID 2188 wrote to memory of 1032	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	33
PID 2188 wrote to memory of 1032	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	33
PID 2188 wrote to memory of 1852	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	35
PID 2188 wrote to memory of 1852	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	35
PID 2188 wrote to memory of 1852	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	35
PID 2188 wrote to memory of 1852	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	35
PID 2188 wrote to memory of 2124	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	37
PID 2188 wrote to memory of 2124	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	37
PID 2188 wrote to memory of 2124	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	37
PID 2188 wrote to memory of 2124	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	37
PID 2188 wrote to memory of 2456	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	39
PID 2188 wrote to memory of 2456	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	39
PID 2188 wrote to memory of 2456	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	39
PID 2188 wrote to memory of 2456	2188	24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe	39
PID 2456 wrote to memory of 2340	2456	cmd.exe	41
PID 2456 wrote to memory of 2340	2456	cmd.exe	41
PID 2456 wrote to memory of 2340	2456	cmd.exe	41
PID 2456 wrote to memory of 2340	2456	cmd.exe	41
PID 2456 wrote to memory of 2104	2456	cmd.exe	42
PID 2456 wrote to memory of 2104	2456	cmd.exe	42
PID 2456 wrote to memory of 2104	2456	cmd.exe	42
PID 2456 wrote to memory of 2104	2456	cmd.exe	42
PID 2456 wrote to memory of 1384	2456	cmd.exe	43
PID 2456 wrote to memory of 1384	2456	cmd.exe	43
PID 2456 wrote to memory of 1384	2456	cmd.exe	43
PID 2456 wrote to memory of 1384	2456	cmd.exe	43

C:\Users\Admin\AppData\Local\Temp\24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe
"C:\Users\Admin\AppData\Local\Temp\24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1956
- 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\24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2184
- C:\Users\Admin\AppData\Local\Temp\24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe
  "C:\Users\Admin\AppData\Local\Temp\24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2188
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "services" /sc ONLOGON /tr "'C:\PerfLogs\Admin\services.exe'" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1032
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\NlsLexicons0027\services.exe'" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1852
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\Documents and Settings\csrss.exe'" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2124
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\E03v8V9qQN.bat"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2456
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2340
  - - 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:2104
  - - C:\Documents and Settings\csrss.exe
      "C:\Documents and Settings\csrss.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:1384

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\E03v8V9qQN.bat

Filesize
201B

MD5
14c1353e5384ae3e16132a18525dac48

SHA1
0dba19dc258caff30119ea07c5cc129409e47a05

SHA256
794cd3fc5f499a9ae8c15f710bb77a9ebf5726f72c8bde58c580bf54a5e7d81e

SHA512
ac98db0f4c983e3c9c26d5968e8c7c78e0318523e5ffb81853aedd5aaa0a53d73fabc147664131c62cdf3b9fd0b1d5846ce6d1a2f3b5ea257575fb2aa4b54f1a

Download Submit
\Users\csrss.exe

Filesize
775KB

MD5
0ed1f9cb842483e03e36cee538678ffd

SHA1
1d13a84aa671b75f66f4c7fce8339619291d4a43

SHA256
24f719954fbcfd391426579d7f4965d2771f0d2751bed291e6a8dd26228315cc

SHA512
78cb214db0ecbc532a50fc1344a138125e0031485c004e95bc21064165f9fd667fa582cd5196a6e1b4276b6dd7fa1d23dfabfe0c58b0d93fbf8e5329b064a809

Download Submit
memory/1384-42-0x00000000011D0000-0x0000000001294000-memory.dmp

Filesize
784KB

Download
memory/1956-21-0x0000000074560000-0x0000000074C4E000-memory.dmp

Filesize
6.9MB

Download
memory/1956-1-0x00000000000D0000-0x0000000000194000-memory.dmp

Filesize
784KB

Download
memory/1956-2-0x0000000074560000-0x0000000074C4E000-memory.dmp

Filesize
6.9MB

Download
memory/1956-3-0x0000000001F50000-0x0000000001F5A000-memory.dmp

Filesize
40KB

Download
memory/1956-4-0x000000007456E000-0x000000007456F000-memory.dmp

Filesize
4KB

Download
memory/1956-5-0x0000000074560000-0x0000000074C4E000-memory.dmp

Filesize
6.9MB

Download
memory/1956-6-0x00000000050D0000-0x0000000005170000-memory.dmp

Filesize
640KB

Download
memory/1956-7-0x0000000004E40000-0x0000000004EC0000-memory.dmp

Filesize
512KB

Download
memory/1956-0-0x000000007456E000-0x000000007456F000-memory.dmp

Filesize
4KB

Download
memory/2188-17-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2188-20-0x0000000074560000-0x0000000074C4E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2188-11-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2188-10-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2188-15-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2188-24-0x0000000074560000-0x0000000074C4E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-19-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2188-36-0x0000000074560000-0x0000000074C4E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-8-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2188-9-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download