dcrat | 365ea7fd9bbe7ca9812eb77fe015d546ebd99a643746ad48cded7dd244bc3540

General

Target

b9253fd99b1e3519bae562e6807f8bb0N.exe
Size

2.3MB
MD5

b9253fd99b1e3519bae562e6807f8bb0
SHA1

7932803ddc64b7411eb697d5f91d59f2bfd08800
SHA256

365ea7fd9bbe7ca9812eb77fe015d546ebd99a643746ad48cded7dd244bc3540
SHA512

0fff0b99fc2570040668dad7b5f3e368bdebdb314ac97daa6d402d649b4ffa1859dbd28d95364fd28480b0887de10f83ef0e1b21d40f23290fd908f214c58c8a
SSDEEP

49152:5uG1LzwL/5XkkofdmHMR7OW3vuKzNYMFjUKJyBWA:5b1L+RNofd17gelFv

Score

10^/10

dcrat credential_access infostealer rat spyware stealer

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 21 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	2044	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2392	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1028	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2136	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4680	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4464	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3204	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2592	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2108	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1424	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4588	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3892	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4880	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4256	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2980	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4520	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2704	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4764	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1860	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4088	3952	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3948	3952	schtasks.exe	87

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4860-1-0x0000000000D80000-0x0000000000FD2000-memory.dmp	dcrat
behavioral2/files/0x00070000000234cc-20.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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	b9253fd99b1e3519bae562e6807f8bb0N.exe

Executes dropped EXE 1 IoCs

pid	Process
4064	dllhost.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Drops file in Program Files directory 6 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Portable Devices\fontdrvhost.exe	b9253fd99b1e3519bae562e6807f8bb0N.exe
File created	C:\Program Files\Windows Portable Devices\5b884080fd4f94	b9253fd99b1e3519bae562e6807f8bb0N.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\en-US\explorer.exe	b9253fd99b1e3519bae562e6807f8bb0N.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\en-US\7a0fd90576e088	b9253fd99b1e3519bae562e6807f8bb0N.exe
File created	C:\Program Files\Crashpad\attachments\dllhost.exe	b9253fd99b1e3519bae562e6807f8bb0N.exe
File created	C:\Program Files\Crashpad\attachments\5940a34987c991	b9253fd99b1e3519bae562e6807f8bb0N.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\assembly\GAC_64\Microsoft.GroupPolicy.AdmTmplEditor.Resources\wininit.exe	b9253fd99b1e3519bae562e6807f8bb0N.exe
File created	C:\Windows\Microsoft.NET\assembly\GAC_64\Microsoft.GroupPolicy.AdmTmplEditor.Resources\56085415360792	b9253fd99b1e3519bae562e6807f8bb0N.exe
File created	C:\Windows\Boot\Resources\en-US\csrss.exe	b9253fd99b1e3519bae562e6807f8bb0N.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-1-5-21-1302416131-1437503476-2806442725-1000_Classes\Local Settings	b9253fd99b1e3519bae562e6807f8bb0N.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 21 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2044	schtasks.exe
2980	schtasks.exe
4520	schtasks.exe
3948	schtasks.exe
4880	schtasks.exe
2704	schtasks.exe
1860	schtasks.exe
2392	schtasks.exe
2592	schtasks.exe
2108	schtasks.exe
1424	schtasks.exe
4588	schtasks.exe
3204	schtasks.exe
4256	schtasks.exe
4764	schtasks.exe
4088	schtasks.exe
1028	schtasks.exe
2136	schtasks.exe
4680	schtasks.exe
4464	schtasks.exe
3892	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
4860	b9253fd99b1e3519bae562e6807f8bb0N.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe
4064	dllhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4860	b9253fd99b1e3519bae562e6807f8bb0N.exe
Token: SeDebugPrivilege	4064	dllhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4860 wrote to memory of 3148	4860	b9253fd99b1e3519bae562e6807f8bb0N.exe	109
PID 4860 wrote to memory of 3148	4860	b9253fd99b1e3519bae562e6807f8bb0N.exe	109
PID 3148 wrote to memory of 680	3148	cmd.exe	111
PID 3148 wrote to memory of 680	3148	cmd.exe	111
PID 3148 wrote to memory of 4064	3148	cmd.exe	115
PID 3148 wrote to memory of 4064	3148	cmd.exe	115

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\b9253fd99b1e3519bae562e6807f8bb0N.exe
"C:\Users\Admin\AppData\Local\Temp\b9253fd99b1e3519bae562e6807f8bb0N.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:4860
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\nduRewZkNT.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3148
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:680
- - C:\Program Files\Crashpad\attachments\dllhost.exe
    "C:\Program Files\Crashpad\attachments\dllhost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\SppExtComObj.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2044

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Users\All Users\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2392

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 12 /tr "'C:\Users\All Users\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1028

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Windows\Microsoft.NET\assembly\GAC_64\Microsoft.GroupPolicy.AdmTmplEditor.Resources\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2136

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\Microsoft.NET\assembly\GAC_64\Microsoft.GroupPolicy.AdmTmplEditor.Resources\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Windows\Microsoft.NET\assembly\GAC_64\Microsoft.GroupPolicy.AdmTmplEditor.Resources\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4464

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Program Files\Crashpad\attachments\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3204

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Crashpad\attachments\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2592

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 10 /tr "'C:\Program Files\Crashpad\attachments\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2108

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1424

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4588

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3892

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Portable Devices\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Windows Portable Devices\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4256

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Portable Devices\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2704

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4520

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1860

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4088

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3948

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\Windows Portable Devices\fontdrvhost.exe

Filesize
2.3MB

MD5
b9253fd99b1e3519bae562e6807f8bb0

SHA1
7932803ddc64b7411eb697d5f91d59f2bfd08800

SHA256
365ea7fd9bbe7ca9812eb77fe015d546ebd99a643746ad48cded7dd244bc3540

SHA512
0fff0b99fc2570040668dad7b5f3e368bdebdb314ac97daa6d402d649b4ffa1859dbd28d95364fd28480b0887de10f83ef0e1b21d40f23290fd908f214c58c8a

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

Filesize
214B

MD5
95bf257560d1cacc8a9e654c82d9e580

SHA1
085791eb2e220f5630a88b38c5c808843668f955

SHA256
0013d544793ce92eef383ccf52ed57b9d717934d664195f0cbbb9e7ca7084727

SHA512
a4295d66712b346c28da42fa88061342ca51883ba5019c5edb843d20cc208a0821cf0fb4e72ed55eab0be342e01d43b9695218e399a632c7ee3c1afd6990cde8

Download Submit
memory/4064-36-0x0000000002660000-0x0000000002672000-memory.dmp

Filesize
72KB

Download
memory/4860-6-0x000000001C1E0000-0x000000001C236000-memory.dmp

Filesize
344KB

Download
memory/4860-0-0x00007FFAD5833000-0x00007FFAD5835000-memory.dmp

Filesize
8KB

Download
memory/4860-5-0x000000001C140000-0x000000001C156000-memory.dmp

Filesize
88KB

Download
memory/4860-4-0x000000001C190000-0x000000001C1E0000-memory.dmp

Filesize
320KB

Download
memory/4860-7-0x000000001BB50000-0x000000001BB62000-memory.dmp

Filesize
72KB

Download
memory/4860-8-0x000000001CA60000-0x000000001CF88000-memory.dmp

Filesize
5.2MB

Download
memory/4860-9-0x000000001BBE0000-0x000000001BBEE000-memory.dmp

Filesize
56KB

Download
memory/4860-10-0x000000001C180000-0x000000001C188000-memory.dmp

Filesize
32KB

Download
memory/4860-11-0x000000001C230000-0x000000001C238000-memory.dmp

Filesize
32KB

Download
memory/4860-3-0x000000001BBC0000-0x000000001BBDC000-memory.dmp

Filesize
112KB

Download
memory/4860-31-0x00007FFAD5830000-0x00007FFAD62F1000-memory.dmp

Filesize
10.8MB

Download
memory/4860-2-0x00007FFAD5830000-0x00007FFAD62F1000-memory.dmp

Filesize
10.8MB

Download
memory/4860-1-0x0000000000D80000-0x0000000000FD2000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads