dcrat | fd687a05b13c4f87f139d043c4d9d936b73762d616204bfb090124fd163c316e

General

Target

a26ae5eb4e86ca54a1d338220318c43b.exe
Size

321KB
MD5

a26ae5eb4e86ca54a1d338220318c43b
SHA1

ba66b537f8b7289acf611e67e1f3b20fb5bb48db
SHA256

fd687a05b13c4f87f139d043c4d9d936b73762d616204bfb090124fd163c316e
SHA512

0d2adc60f34f1d13be88df0034220e41a36f0a2dc8217fe1fc42714834f080c81f033d61f4f23af6c50c74d94d23a689714ef4c8824c96992fd478587cb31ccd
SSDEEP

6144:1RmCttlxSX8YOKPnzxx7YyRRYz4OjnYDh+OHYQmrBQ4rQbFZUzEo1V:vmJMYt/czYDh+OOQMQbT

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 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	3296	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2648	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1224	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2612	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2112	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1080	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	392	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3052	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1724	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1204	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3524	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4188	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2212	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4976	1188	schtasks.exe	81
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2196	1188	schtasks.exe	81

DCRat payload 1 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/4828-9-0x0000000001740000-0x0000000001796000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1516	StartMenuExperienceHost.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Windows Sidebar\StartMenuExperienceHost.exe	a26ae5eb4e86ca54a1d338220318c43b.exe
File created	C:\Program Files (x86)\Windows Sidebar\55b276f4edf653	a26ae5eb4e86ca54a1d338220318c43b.exe
File created	C:\Program Files (x86)\Windows Sidebar\StartMenuExperienceHost.exe	a26ae5eb4e86ca54a1d338220318c43b.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\es-ES\cfa885d449487c	a26ae5eb4e86ca54a1d338220318c43b.exe
File created	C:\Windows\es-ES\SearchHost.exe	a26ae5eb4e86ca54a1d338220318c43b.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	w32tm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	StartMenuExperienceHost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a26ae5eb4e86ca54a1d338220318c43b.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2410826464-2353372766-2364966905-1000_Classes\Local Settings	a26ae5eb4e86ca54a1d338220318c43b.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
3524	schtasks.exe
1224	schtasks.exe
2612	schtasks.exe
1724	schtasks.exe
2212	schtasks.exe
2648	schtasks.exe
1080	schtasks.exe
392	schtasks.exe
4976	schtasks.exe
3296	schtasks.exe
2112	schtasks.exe
3052	schtasks.exe
1204	schtasks.exe
4188	schtasks.exe
2196	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4828	a26ae5eb4e86ca54a1d338220318c43b.exe
1516	StartMenuExperienceHost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4828	a26ae5eb4e86ca54a1d338220318c43b.exe
Token: SeDebugPrivilege	1516	StartMenuExperienceHost.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4828 wrote to memory of 3752	4828	a26ae5eb4e86ca54a1d338220318c43b.exe	97
PID 4828 wrote to memory of 3752	4828	a26ae5eb4e86ca54a1d338220318c43b.exe	97
PID 4828 wrote to memory of 3752	4828	a26ae5eb4e86ca54a1d338220318c43b.exe	97
PID 3752 wrote to memory of 3332	3752	cmd.exe	99
PID 3752 wrote to memory of 3332	3752	cmd.exe	99
PID 3752 wrote to memory of 3332	3752	cmd.exe	99
PID 3332 wrote to memory of 1844	3332	w32tm.exe	100
PID 3332 wrote to memory of 1844	3332	w32tm.exe	100
PID 3752 wrote to memory of 1516	3752	cmd.exe	101
PID 3752 wrote to memory of 1516	3752	cmd.exe	101
PID 3752 wrote to memory of 1516	3752	cmd.exe	101

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\a26ae5eb4e86ca54a1d338220318c43b.exe
"C:\Users\Admin\AppData\Local\Temp\a26ae5eb4e86ca54a1d338220318c43b.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Yrcq9UWmHg.bat"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3752
- - C:\Windows\SysWOW64\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3332
  - - C:\Windows\system32\w32tm.exe
      w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
      4⤵
      PID:1844
- - C:\Program Files (x86)\Windows Sidebar\StartMenuExperienceHost.exe
    "C:\Program Files (x86)\Windows Sidebar\StartMenuExperienceHost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1516

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Sidebar\StartMenuExperienceHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Sidebar\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1224

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 14 /tr "'C:\Users\Public\sysmon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Users\Public\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2112

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 8 /tr "'C:\Users\Public\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1080

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:392

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1724

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1204

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3524

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4188

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchHostS" /sc MINUTE /mo 11 /tr "'C:\Windows\es-ES\SearchHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchHost" /sc ONLOGON /tr "'C:\Windows\es-ES\SearchHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4976

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchHostS" /sc MINUTE /mo 6 /tr "'C:\Windows\es-ES\SearchHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2196

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

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Yrcq9UWmHg.bat

Filesize
231B

MD5
8a974794273cda56524b52f964815625

SHA1
42cf995abf5735d8be027ca4e5f7ff758525d180

SHA256
cfc81019060d10d282bdf0e75c8fc30e92414544a019c7ebdc64d4a3208db41e

SHA512
d4f3a07ca0fd4657d2463d627372d0efb669c58b29b14079211ba6a886fe5046daaf47aad7d8ebab6d0b7903839f443b9b6654257b5817c3309ebef6fff245cc

Download Submit
C:\Windows\es-ES\SearchHost.exe

Filesize
321KB

MD5
a26ae5eb4e86ca54a1d338220318c43b

SHA1
ba66b537f8b7289acf611e67e1f3b20fb5bb48db

SHA256
fd687a05b13c4f87f139d043c4d9d936b73762d616204bfb090124fd163c316e

SHA512
0d2adc60f34f1d13be88df0034220e41a36f0a2dc8217fe1fc42714834f080c81f033d61f4f23af6c50c74d94d23a689714ef4c8824c96992fd478587cb31ccd

Download Submit
memory/4828-6-0x0000000007DF0000-0x0000000007DFA000-memory.dmp

Filesize
40KB

Download
memory/4828-3-0x0000000007E20000-0x0000000007EBC000-memory.dmp

Filesize
624KB

Download
memory/4828-4-0x0000000008470000-0x0000000008A16000-memory.dmp

Filesize
5.6MB

Download
memory/4828-5-0x0000000007EC0000-0x0000000007F52000-memory.dmp

Filesize
584KB

Download
memory/4828-0-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/4828-7-0x0000000074C50000-0x0000000075401000-memory.dmp

Filesize
7.7MB

Download
memory/4828-8-0x00000000080B0000-0x0000000008106000-memory.dmp

Filesize
344KB

Download
memory/4828-9-0x0000000001740000-0x0000000001796000-memory.dmp

Filesize
344KB

Download
memory/4828-12-0x00000000062A0000-0x0000000006306000-memory.dmp

Filesize
408KB

Download
memory/4828-2-0x0000000007CA0000-0x0000000007D7C000-memory.dmp

Filesize
880KB

Download
memory/4828-26-0x0000000074C50000-0x0000000075401000-memory.dmp

Filesize
7.7MB

Download
memory/4828-1-0x0000000000D30000-0x0000000000D86000-memory.dmp

Filesize
344KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads