dcrat | 214082ec55ebca25be21e5b5227ad0e89c08026c55a21fc57dc4bd2764f5d28f

Analysis

max time kernel
147s
max time network
159s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20250314-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250314-enlocale:en-usos:windows10-ltsc_2021-x64system
submitted
05/04/2025, 12:07

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General

Target

rihuata-main/zuyokhrfhhfde.exe
Size

2.3MB
MD5

9df7d705ddf9926d2981f7efc5050f9b
SHA1

0df97ba0725ad9019a882ff3dd4a4a92089282b1
SHA256

8350e523807323dc6b9d60a5ebe411dab4826a4e7584a1fad4583ce71dfac504
SHA512

873aa17897827b956021cb4266c33fc44fec658e1c6722f70207a5f91ff5225b0a5f54fceedbced41931dd05f22e189a0bc452a0fdc1aa846259cc435b5f8f07
SSDEEP

24576:j4khR33V3uCw7sULd3yUJVdzxlkj/7WUx2VzUN+XpOPwze6t:0khn3I0KcWBAEb

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

Process spawned unexpected child process 3 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	228	3616	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	548	3616	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	224	3616	schtasks.exe	82

DCRat payload 2 IoCs

rat

resource	yara_rule
behavioral31/memory/3988-1-0x00000000006A0000-0x00000000008F8000-memory.dmp	family_dcrat_v2
behavioral31/files/0x002c0000000227cc-62.dat	family_dcrat_v2

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-1-5-21-780313508-644878201-565826771-1000\Control Panel\International\Geo\Nation	zuyokhrfhhfde.exe

Executes dropped EXE 1 IoCs

pid	Process
5068	staticfile.exe

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

System Information Discovery
T1082

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
5516	PING.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-780313508-644878201-565826771-1000_Classes\Local Settings	zuyokhrfhhfde.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5516	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
548	schtasks.exe
224	schtasks.exe
228	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe
3988	zuyokhrfhhfde.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3988	zuyokhrfhhfde.exe
Token: SeDebugPrivilege	5068	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3988 wrote to memory of 4032	3988	zuyokhrfhhfde.exe	86
PID 3988 wrote to memory of 4032	3988	zuyokhrfhhfde.exe	86
PID 4032 wrote to memory of 2116	4032	cmd.exe	88
PID 4032 wrote to memory of 2116	4032	cmd.exe	88
PID 4032 wrote to memory of 5516	4032	cmd.exe	89
PID 4032 wrote to memory of 5516	4032	cmd.exe	89
PID 4032 wrote to memory of 5068	4032	cmd.exe	95
PID 4032 wrote to memory of 5068	4032	cmd.exe	95

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\rihuata-main\zuyokhrfhhfde.exe
"C:\Users\Admin\AppData\Local\Temp\rihuata-main\zuyokhrfhhfde.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3988
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\1WWZqGlb0S.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4032
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2116
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:5516
- - C:\Users\Admin\AppData\Local\staticfile.exe
    "C:\Users\Admin\AppData\Local\staticfile.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:5068

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "staticfiles" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\AppData\Local\staticfile.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:228

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "staticfile" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\staticfile.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:224

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "staticfiles" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\AppData\Local\staticfile.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:548

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

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\1WWZqGlb0S.bat

Filesize
171B

MD5
ee3c3c79f551217c91b663e6af534b22

SHA1
fc1b397d76fee192575deca762d7ae9dc991a6fb

SHA256
afc598b03447ce0e4a3dc6f2725325ef29ec86195d017d2d0af410659de8d2e2

SHA512
bf454299f086818e30b5c7bb8a11e54080d62d4ecdb3e734a96a430b93a34b12fc913eda4f98e4b1d632518abf4d0bf564b36898efb95f97592382b8147ea15f

Download Submit
C:\Users\Admin\AppData\Local\staticfile.exe

Filesize
2.3MB

MD5
9df7d705ddf9926d2981f7efc5050f9b

SHA1
0df97ba0725ad9019a882ff3dd4a4a92089282b1

SHA256
8350e523807323dc6b9d60a5ebe411dab4826a4e7584a1fad4583ce71dfac504

SHA512
873aa17897827b956021cb4266c33fc44fec658e1c6722f70207a5f91ff5225b0a5f54fceedbced41931dd05f22e189a0bc452a0fdc1aa846259cc435b5f8f07

Download Submit
memory/3988-24-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-28-0x000000001B690000-0x000000001B6A6000-memory.dmp

Filesize
88KB

Download
memory/3988-5-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-7-0x0000000000F90000-0x0000000000F9E000-memory.dmp

Filesize
56KB

Download
memory/3988-9-0x0000000002880000-0x000000000289C000-memory.dmp

Filesize
112KB

Download
memory/3988-11-0x0000000000FB0000-0x0000000000FCC000-memory.dmp

Filesize
112KB

Download
memory/3988-10-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-12-0x000000001B5E0000-0x000000001B630000-memory.dmp

Filesize
320KB

Download
memory/3988-14-0x0000000002880000-0x0000000002890000-memory.dmp

Filesize
64KB

Download
memory/3988-19-0x0000000002890000-0x00000000028A0000-memory.dmp

Filesize
64KB

Download
memory/3988-17-0x0000000002970000-0x0000000002988000-memory.dmp

Filesize
96KB

Download
memory/3988-15-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-21-0x00000000028A0000-0x00000000028B0000-memory.dmp

Filesize
64KB

Download
memory/3988-23-0x0000000002950000-0x000000000295E000-memory.dmp

Filesize
56KB

Download
memory/3988-0-0x00007FFA44333000-0x00007FFA44335000-memory.dmp

Filesize
8KB

Download
memory/3988-26-0x000000001B670000-0x000000001B682000-memory.dmp

Filesize
72KB

Download
memory/3988-4-0x00000000028B0000-0x00000000028D6000-memory.dmp

Filesize
152KB

Download
memory/3988-31-0x000000001B6B0000-0x000000001B6C2000-memory.dmp

Filesize
72KB

Download
memory/3988-29-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-32-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-33-0x000000001BC00000-0x000000001C128000-memory.dmp

Filesize
5.2MB

Download
memory/3988-36-0x0000000002990000-0x000000000299E000-memory.dmp

Filesize
56KB

Download
memory/3988-38-0x000000001B5D0000-0x000000001B5E0000-memory.dmp

Filesize
64KB

Download
memory/3988-34-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-40-0x000000001B630000-0x000000001B640000-memory.dmp

Filesize
64KB

Download
memory/3988-42-0x000000001B730000-0x000000001B78A000-memory.dmp

Filesize
360KB

Download
memory/3988-44-0x000000001B640000-0x000000001B650000-memory.dmp

Filesize
64KB

Download
memory/3988-46-0x000000001B650000-0x000000001B65E000-memory.dmp

Filesize
56KB

Download
memory/3988-48-0x000000001B6F0000-0x000000001B708000-memory.dmp

Filesize
96KB

Download
memory/3988-50-0x000000001B7E0000-0x000000001B82E000-memory.dmp

Filesize
312KB

Download
memory/3988-2-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-60-0x00007FFA44330000-0x00007FFA44DF2000-memory.dmp

Filesize
10.8MB

Download
memory/3988-1-0x00000000006A0000-0x00000000008F8000-memory.dmp

Filesize
2.3MB

Download