dcrat | a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf

General

Target

50887c3ed5676401f9cab09d742bbce4.exe
Size

827KB
MD5

50887c3ed5676401f9cab09d742bbce4
SHA1

1e4016e50cffe51614df5a31817d50de7b85af26
SHA256

a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf
SHA512

bd8ec53d02ba47c8656c4260d2112f50755526898b681d1affbd50a6bdda69f01fa78d091ff812d3a25454afd03eca815fea7b869f037b4f492b1d188f376ab2
SSDEEP

12288:2NultHBphsl8LvoS8wXO0DzXLYFlTvyk31:ZHBp+ovohwDeTv131

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	1252	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2012	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4456	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4216	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2096	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1168	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1388	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3768	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2076	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4424	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4248	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3728	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2660	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3744	3860	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1220	3860	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/1356-1-0x0000000000DD0000-0x0000000000EA6000-memory.dmp	dcrat
behavioral2/files/0x000a000000023b8a-11.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	50887c3ed5676401f9cab09d742bbce4.exe

Executes dropped EXE 1 IoCs

pid	Process
2248	wininit.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Reference Assemblies\Microsoft\TextInputHost.exe	50887c3ed5676401f9cab09d742bbce4.exe
File created	C:\Program Files\Reference Assemblies\Microsoft\22eafd247d37c3	50887c3ed5676401f9cab09d742bbce4.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\ServiceState\EventLog\Data\csrss.exe	50887c3ed5676401f9cab09d742bbce4.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 15 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1252	schtasks.exe
1220	schtasks.exe
1168	schtasks.exe
3744	schtasks.exe
2660	schtasks.exe
2012	schtasks.exe
2096	schtasks.exe
1388	schtasks.exe
2076	schtasks.exe
4424	schtasks.exe
3728	schtasks.exe
4456	schtasks.exe
4216	schtasks.exe
3768	schtasks.exe
4248	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1356	50887c3ed5676401f9cab09d742bbce4.exe
1356	50887c3ed5676401f9cab09d742bbce4.exe
1356	50887c3ed5676401f9cab09d742bbce4.exe
1356	50887c3ed5676401f9cab09d742bbce4.exe
1356	50887c3ed5676401f9cab09d742bbce4.exe
2248	wininit.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1356	50887c3ed5676401f9cab09d742bbce4.exe
Token: SeDebugPrivilege	2248	wininit.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1356 wrote to memory of 2248	1356	50887c3ed5676401f9cab09d742bbce4.exe	99
PID 1356 wrote to memory of 2248	1356	50887c3ed5676401f9cab09d742bbce4.exe	99

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\50887c3ed5676401f9cab09d742bbce4.exe
"C:\Users\Admin\AppData\Local\Temp\50887c3ed5676401f9cab09d742bbce4.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:1356
- C:\Recovery\WindowsRE\wininit.exe
  "C:\Recovery\WindowsRE\wininit.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2248

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1252

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2012

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4456

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 9 /tr "'C:\Program Files\Reference Assemblies\Microsoft\TextInputHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4216

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Program Files\Reference Assemblies\Microsoft\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2096

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 5 /tr "'C:\Program Files\Reference Assemblies\Microsoft\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1168

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1388

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3768

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2076

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Users\Default\Downloads\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4424

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Default\Downloads\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4248

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Downloads\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\StartMenuExperienceHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1220

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

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Downloads

C:\Recovery\WindowsRE\StartMenuExperienceHost.exe

Filesize
827KB

MD5
50887c3ed5676401f9cab09d742bbce4

SHA1
1e4016e50cffe51614df5a31817d50de7b85af26

SHA256
a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf

SHA512
bd8ec53d02ba47c8656c4260d2112f50755526898b681d1affbd50a6bdda69f01fa78d091ff812d3a25454afd03eca815fea7b869f037b4f492b1d188f376ab2

Download Submit
memory/1356-0-0x00007FFB42953000-0x00007FFB42955000-memory.dmp

Filesize
8KB

Download
memory/1356-1-0x0000000000DD0000-0x0000000000EA6000-memory.dmp

Filesize
856KB

Download
memory/1356-4-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/1356-24-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads