dcrat | c8fb375ee835d718902d31f7b5b0aac712f48a38b0dffb49eedbfc020268d74d

Analysis

max time kernel
93s
max time network
99s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-01-2025 02:16

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General

Target

a607a7ee35ffe0cf408f2d255b6adeda.exe
Size

1.1MB
MD5

a607a7ee35ffe0cf408f2d255b6adeda
SHA1

0ba9574eba34a8db8fe8f99497b8e895c237f7d8
SHA256

c8fb375ee835d718902d31f7b5b0aac712f48a38b0dffb49eedbfc020268d74d
SHA512

f21e67de096599231905b9813a0b3843d6ab9ca7301bf1360b9b3db44ce698d01ddef85d4de870c2a125c335ac57de6083aea686aeb287cb2effa75952e7a0c5
SSDEEP

24576:6u3FsFhnmHEqiKd7udDkZWwP5Nf4JKcjSL7i:j3sm6kZW0H4oMSH

Score

10^/10

dcrat 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

Process spawned unexpected child process 30 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3740	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2056	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4416	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1296	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4448	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4636	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	756	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4040	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3816	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2164	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1216	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2384	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	400	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2620	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3048	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5020	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4380	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	736	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2000	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5060	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4908	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	116	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4624	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1116	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1472	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1552	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4896	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5048	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4232	4656	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1588	4656	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/1504-1-0x0000000000EE0000-0x0000000001006000-memory.dmp	dcrat
behavioral2/files/0x0008000000023c18-14.dat	dcrat

Checks computer location settings 2 TTPs 1 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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	a607a7ee35ffe0cf408f2d255b6adeda.exe

Executes dropped EXE 1 IoCs

pid	Process
3124	StartMenuExperienceHost.exe

Drops file in Program Files directory 13 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Mail\RuntimeBroker.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files\Google\Chrome\Application\cc11b995f2a76d	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\sysmon.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\121e5b5079f7c0	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\de-DE\69ddcba757bf72	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\886983d96e3d3e	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\de-DE\smss.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe
File opened for modification	C:\Program Files\Windows Mail\RuntimeBroker.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files\Windows Mail\9e8d7a4ca61bd9	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\dllhost.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\5940a34987c991	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files\Google\Chrome\Application\winlogon.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\csrss.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Offline Web Pages\55b276f4edf653	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Windows\LanguageOverlayCache\taskhostw.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe
File created	C:\Windows\Offline Web Pages\StartMenuExperienceHost.exe	a607a7ee35ffe0cf408f2d255b6adeda.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 30 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2164	schtasks.exe
4908	schtasks.exe
1116	schtasks.exe
4232	schtasks.exe
1588	schtasks.exe
3816	schtasks.exe
2620	schtasks.exe
5020	schtasks.exe
736	schtasks.exe
3740	schtasks.exe
4624	schtasks.exe
4380	schtasks.exe
5060	schtasks.exe
1552	schtasks.exe
4896	schtasks.exe
116	schtasks.exe
1472	schtasks.exe
4416	schtasks.exe
4040	schtasks.exe
1216	schtasks.exe
3048	schtasks.exe
2000	schtasks.exe
2384	schtasks.exe
400	schtasks.exe
5048	schtasks.exe
2056	schtasks.exe
1296	schtasks.exe
4448	schtasks.exe
4636	schtasks.exe
756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1504	a607a7ee35ffe0cf408f2d255b6adeda.exe
1504	a607a7ee35ffe0cf408f2d255b6adeda.exe
1504	a607a7ee35ffe0cf408f2d255b6adeda.exe
1504	a607a7ee35ffe0cf408f2d255b6adeda.exe
1504	a607a7ee35ffe0cf408f2d255b6adeda.exe
1504	a607a7ee35ffe0cf408f2d255b6adeda.exe
1504	a607a7ee35ffe0cf408f2d255b6adeda.exe
3124	StartMenuExperienceHost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1504	a607a7ee35ffe0cf408f2d255b6adeda.exe
Token: SeDebugPrivilege	3124	StartMenuExperienceHost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 3124	1504	a607a7ee35ffe0cf408f2d255b6adeda.exe	113
PID 1504 wrote to memory of 3124	1504	a607a7ee35ffe0cf408f2d255b6adeda.exe	113

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\a607a7ee35ffe0cf408f2d255b6adeda.exe
"C:\Users\Admin\AppData\Local\Temp\a607a7ee35ffe0cf408f2d255b6adeda.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Windows\Offline Web Pages\StartMenuExperienceHost.exe
  "C:\Windows\Offline Web Pages\StartMenuExperienceHost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3124

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Mail\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2056

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Mail\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4416

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4448

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4636

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:756

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\SppExtComObj.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2164

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1216

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2384

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows NT\Accessories\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:400

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows NT\Accessories\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3048

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 8 /tr "'C:\Windows\Offline Web Pages\StartMenuExperienceHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5020

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\Offline Web Pages\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4380

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 11 /tr "'C:\Windows\Offline Web Pages\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:736

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 13 /tr "'C:\Program Files\Google\Chrome\Application\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5060

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 9 /tr "'C:\Program Files\Google\Chrome\Application\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4908

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\sysmon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:116

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4624

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1116

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1472

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1552

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4896

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5048

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4232

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Windows NT\Accessories\dllhost.exe

Filesize
1.1MB

MD5
a607a7ee35ffe0cf408f2d255b6adeda

SHA1
0ba9574eba34a8db8fe8f99497b8e895c237f7d8

SHA256
c8fb375ee835d718902d31f7b5b0aac712f48a38b0dffb49eedbfc020268d74d

SHA512
f21e67de096599231905b9813a0b3843d6ab9ca7301bf1360b9b3db44ce698d01ddef85d4de870c2a125c335ac57de6083aea686aeb287cb2effa75952e7a0c5

Download Submit
memory/1504-0-0x00007FFEF6F03000-0x00007FFEF6F05000-memory.dmp

Filesize
8KB

Download
memory/1504-1-0x0000000000EE0000-0x0000000001006000-memory.dmp

Filesize
1.1MB

Download
memory/1504-2-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp

Filesize
10.8MB

Download
memory/1504-3-0x000000001BC10000-0x000000001BC2C000-memory.dmp

Filesize
112KB

Download
memory/1504-5-0x000000001BC30000-0x000000001BC46000-memory.dmp

Filesize
88KB

Download
memory/1504-4-0x000000001BDC0000-0x000000001BE10000-memory.dmp

Filesize
320KB

Download
memory/1504-37-0x00007FFEF6F00000-0x00007FFEF79C1000-memory.dmp

Filesize
10.8MB

Download