dcrat | fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b

General

Target

383cad8eb4744a1be8c2b17c74b97b0a.exe
Size

1.2MB
MD5

383cad8eb4744a1be8c2b17c74b97b0a
SHA1

23ccdd08ba293d56ac66b682b57585a85e1742a1
SHA256

fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b
SHA512

713896072fd43a6566c895ff96f47fb13442864004e1977a79632818537fdf42401fe0659b2ffe21cdf30a097c5d1576b8856046629822cede88f5f77c0a275d
SSDEEP

24576:MATnwO965z/roRbcJEV2oLI2gDMwifE+O3jV5kF9BrK:XuaKEEgTBr

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 15 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	3248	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4308	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4800	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3012	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3740	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4140	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1916	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3284	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2632	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4668	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3624	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3320	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3032	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3644	4032	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4392	4032	schtasks.exe	85

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4324-1-0x0000000000F40000-0x000000000107E000-memory.dmp	dcrat
behavioral2/files/0x0008000000023bbe-16.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	383cad8eb4744a1be8c2b17c74b97b0a.exe

Executes dropped EXE 1 IoCs

pid	Process
3964	sysmon.exe

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Adobe\9e8d7a4ca61bd9	383cad8eb4744a1be8c2b17c74b97b0a.exe
File created	C:\Program Files\Microsoft Office\Office16\5940a34987c991	383cad8eb4744a1be8c2b17c74b97b0a.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe	383cad8eb4744a1be8c2b17c74b97b0a.exe
File opened for modification	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe	383cad8eb4744a1be8c2b17c74b97b0a.exe
File created	C:\Program Files (x86)\Adobe\RuntimeBroker.exe	383cad8eb4744a1be8c2b17c74b97b0a.exe
File created	C:\Program Files\Microsoft Office\Office16\dllhost.exe	383cad8eb4744a1be8c2b17c74b97b0a.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\9e8d7a4ca61bd9	383cad8eb4744a1be8c2b17c74b97b0a.exe
File created	C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe	383cad8eb4744a1be8c2b17c74b97b0a.exe
File created	C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\121e5b5079f7c0	383cad8eb4744a1be8c2b17c74b97b0a.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\DiagTrack\Scenarios\SearchApp.exe	383cad8eb4744a1be8c2b17c74b97b0a.exe
File created	C:\Windows\DiagTrack\Scenarios\38384e6a620884	383cad8eb4744a1be8c2b17c74b97b0a.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	383cad8eb4744a1be8c2b17c74b97b0a.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 15 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3248	schtasks.exe
3624	schtasks.exe
3644	schtasks.exe
3284	schtasks.exe
4668	schtasks.exe
3320	schtasks.exe
4308	schtasks.exe
2632	schtasks.exe
4392	schtasks.exe
4140	schtasks.exe
1916	schtasks.exe
3032	schtasks.exe
4800	schtasks.exe
3012	schtasks.exe
3740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
3964	sysmon.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4324	383cad8eb4744a1be8c2b17c74b97b0a.exe
Token: SeDebugPrivilege	3964	sysmon.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4324 wrote to memory of 2924	4324	383cad8eb4744a1be8c2b17c74b97b0a.exe	101
PID 4324 wrote to memory of 2924	4324	383cad8eb4744a1be8c2b17c74b97b0a.exe	101
PID 2924 wrote to memory of 212	2924	cmd.exe	103
PID 2924 wrote to memory of 212	2924	cmd.exe	103
PID 2924 wrote to memory of 3964	2924	cmd.exe	104
PID 2924 wrote to memory of 3964	2924	cmd.exe	104

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\383cad8eb4744a1be8c2b17c74b97b0a.exe
"C:\Users\Admin\AppData\Local\Temp\383cad8eb4744a1be8c2b17c74b97b0a.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ojhC1kT1oI.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2924
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:212
- - C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe
    "C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3964

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3248

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.0\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4800

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3012

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4140

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 13 /tr "'C:\Windows\DiagTrack\Scenarios\SearchApp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\DiagTrack\Scenarios\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3284

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 13 /tr "'C:\Windows\DiagTrack\Scenarios\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2632

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Adobe\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4668

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3624

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Adobe\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3320

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Program Files\Microsoft Office\Office16\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\Office16\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3644

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Program Files\Microsoft Office\Office16\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\Microsoft Office\Office16\dllhost.exe

Filesize
1.2MB

MD5
383cad8eb4744a1be8c2b17c74b97b0a

SHA1
23ccdd08ba293d56ac66b682b57585a85e1742a1

SHA256
fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b

SHA512
713896072fd43a6566c895ff96f47fb13442864004e1977a79632818537fdf42401fe0659b2ffe21cdf30a097c5d1576b8856046629822cede88f5f77c0a275d

Download Submit
C:\Users\Admin\AppData\Local\Temp\ojhC1kT1oI.bat

Filesize
239B

MD5
c6111c17cd88a031026889427bff32ed

SHA1
65b8f11314a5ceebfcf21096428966b7dbc77dac

SHA256
8b3f5d1270c1deb29028754c1e21efe9f3eb74d3e2e907a4591456341894d9ca

SHA512
63876931b70662329ef0eb09fec6375a225dd8a77d77ea7a43bf31e823cf3eec4f187dfd26d13fa215a3a7184e74c6e24756b49f0c50ce74ba0459c14846972e

Download Submit
memory/3964-28-0x0000000000CA0000-0x0000000000CB2000-memory.dmp

Filesize
72KB

Download
memory/4324-0-0x00007FFF2B5F3000-0x00007FFF2B5F5000-memory.dmp

Filesize
8KB

Download
memory/4324-1-0x0000000000F40000-0x000000000107E000-memory.dmp

Filesize
1.2MB

Download
memory/4324-2-0x00007FFF2B5F0000-0x00007FFF2C0B1000-memory.dmp

Filesize
10.8MB

Download
memory/4324-3-0x0000000003240000-0x000000000325C000-memory.dmp

Filesize
112KB

Download
memory/4324-4-0x000000001C270000-0x000000001C2C0000-memory.dmp

Filesize
320KB

Download
memory/4324-5-0x0000000003280000-0x0000000003296000-memory.dmp

Filesize
88KB

Download
memory/4324-6-0x0000000003260000-0x0000000003272000-memory.dmp

Filesize
72KB

Download
memory/4324-7-0x000000001C900000-0x000000001CE28000-memory.dmp

Filesize
5.2MB

Download
memory/4324-23-0x00007FFF2B5F0000-0x00007FFF2C0B1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads