dcrat | 07ded566e4fb6aef08946ca3aa07ccc46d53df78a7716280410801bcf2f48cec

General

Target

c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
Size

2.3MB
MD5

499f14a1e407d82bac24d6ac62b1f7ee
SHA1

f6c0cbae4795f6c0590fa6db2da41a70f840cec6
SHA256

c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693
SHA512

72701089d14891d69ba46c44fbf38e98011313271971c4ba4b2044ae375bcf8474098b1d17a7823ee4afc4c495e27b76a38741fe6ad33252232671a2e094b07b
SSDEEP

24576:NY5J0GMnewFiryL/VSXXn++KN5BGbLPv0LfQceR9EqbIlHgzVEPRA8ElB/p3FIrx:NYj0obkY1XifQ7RHbJK+8qrIrufZTpI

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

Process spawned unexpected child process 9 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	3648	4628	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1172	4628	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2864	4628	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3116	4628	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2040	4628	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4648	4628	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1672	4628	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	816	4628	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3844	4628	schtasks.exe	85

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/528-1-0x0000000000BD0000-0x0000000000E22000-memory.dmp	dcrat
behavioral2/files/0x0007000000023533-19.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-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe

Executes dropped EXE 1 IoCs

pid	Process
1852	RuntimeBroker.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
File created	C:\Program Files (x86)\Windows Sidebar\Gadgets\9e8d7a4ca61bd9	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 9 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
3648	schtasks.exe
2864	schtasks.exe
3116	schtasks.exe
1672	schtasks.exe
816	schtasks.exe
3844	schtasks.exe
1172	schtasks.exe
2040	schtasks.exe
4648	schtasks.exe

Suspicious behavior: EnumeratesProcesses 18 IoCs

pid	Process
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
1852	RuntimeBroker.exe
1852	RuntimeBroker.exe
1852	RuntimeBroker.exe
1852	RuntimeBroker.exe
1852	RuntimeBroker.exe
1852	RuntimeBroker.exe
1852	RuntimeBroker.exe
1852	RuntimeBroker.exe
1852	RuntimeBroker.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1852	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
Token: SeDebugPrivilege	1852	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 528 wrote to memory of 1852	528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe	95
PID 528 wrote to memory of 1852	528	c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.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\c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe
"C:\Users\Admin\AppData\Local\Temp\c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:528
- C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe
  "C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:1852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\SendTo\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Admin\SendTo\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1172

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\SendTo\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3116

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693c" /sc MINUTE /mo 5 /tr "'C:\Users\Default\c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1672

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693" /sc ONLOGON /tr "'C:\Users\Default\c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693c" /sc MINUTE /mo 11 /tr "'C:\Users\Default\c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe

Filesize
2.3MB

MD5
499f14a1e407d82bac24d6ac62b1f7ee

SHA1
f6c0cbae4795f6c0590fa6db2da41a70f840cec6

SHA256
c7d5c20a8f8704cd72855276ade10f22dc95cbce0d89aedcaab2ad64a8753693

SHA512
72701089d14891d69ba46c44fbf38e98011313271971c4ba4b2044ae375bcf8474098b1d17a7823ee4afc4c495e27b76a38741fe6ad33252232671a2e094b07b

Download Submit
memory/528-6-0x000000001BA00000-0x000000001BA56000-memory.dmp

Filesize
344KB

Download
memory/528-9-0x0000000003210000-0x000000000321E000-memory.dmp

Filesize
56KB

Download
memory/528-3-0x0000000003030000-0x000000000304C000-memory.dmp

Filesize
112KB

Download
memory/528-0-0x00007FFE00E93000-0x00007FFE00E95000-memory.dmp

Filesize
8KB

Download
memory/528-5-0x0000000003170000-0x0000000003186000-memory.dmp

Filesize
88KB

Download
memory/528-4-0x00000000031C0000-0x0000000003210000-memory.dmp

Filesize
320KB

Download
memory/528-2-0x00007FFE00E90000-0x00007FFE01951000-memory.dmp

Filesize
10.8MB

Download
memory/528-11-0x000000001BA50000-0x000000001BA58000-memory.dmp

Filesize
32KB

Download
memory/528-7-0x0000000003190000-0x00000000031A2000-memory.dmp

Filesize
72KB

Download
memory/528-10-0x0000000003220000-0x0000000003228000-memory.dmp

Filesize
32KB

Download
memory/528-8-0x000000001CAB0000-0x000000001CFD8000-memory.dmp

Filesize
5.2MB

Download
memory/528-1-0x0000000000BD0000-0x0000000000E22000-memory.dmp

Filesize
2.3MB

Download
memory/528-29-0x00007FFE00E90000-0x00007FFE01951000-memory.dmp

Filesize
10.8MB

Download
memory/1852-30-0x000000001D300000-0x000000001D356000-memory.dmp

Filesize
344KB

Download
memory/1852-31-0x000000001BFF0000-0x000000001C002000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads