dcrat | 79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526

General

Target

5313e2143d6c1f978638038f19f29e6b.exe
Size

1001KB
MD5

5313e2143d6c1f978638038f19f29e6b
SHA1

c70695edf05d60e4726fcdd905ff23248b7ba1dd
SHA256

79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526
SHA512

1b6293810afd89fee0b93a73a6ae73844677f98a7e1cff389637d56dbf908e2f20556765cb95d77156fd704c154f224920bec666deb23b5972b9ed0dcdb4e76b
SSDEEP

12288:9gSCIO3J+/FC3kveKD/FefpE/PZpaf0UPIvJ+0DELw4X7x2tTtUG4:9xCIOgFC3kveIFnPMhG3EEOAvUG4

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 9 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2744	2920	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2584	2920	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2884	2920	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2808	2920	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2560	2920	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2616	2920	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3008	2920	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2720	2920	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1660	2920	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral1/memory/2124-1-0x0000000001050000-0x0000000001152000-memory.dmp	dcrat
behavioral1/files/0x00070000000173a9-16.dat	dcrat
behavioral1/memory/2876-18-0x0000000000990000-0x0000000000A92000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

Processes:

smss.exe

pid	Process
2876	smss.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 9 IoCs

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

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid	Process
2884	schtasks.exe
3008	schtasks.exe
2720	schtasks.exe
1660	schtasks.exe
2616	schtasks.exe
2744	schtasks.exe
2584	schtasks.exe
2808	schtasks.exe
2560	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

5313e2143d6c1f978638038f19f29e6b.exesmss.exe

pid	Process
2124	5313e2143d6c1f978638038f19f29e6b.exe
2124	5313e2143d6c1f978638038f19f29e6b.exe
2124	5313e2143d6c1f978638038f19f29e6b.exe
2876	smss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

5313e2143d6c1f978638038f19f29e6b.exesmss.exe

description	pid	Process
Token: SeDebugPrivilege	2124	5313e2143d6c1f978638038f19f29e6b.exe
Token: SeDebugPrivilege	2876	smss.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

5313e2143d6c1f978638038f19f29e6b.execmd.exe

description	pid	Process	procid_target
PID 2124 wrote to memory of 2276	2124	5313e2143d6c1f978638038f19f29e6b.exe	40
PID 2124 wrote to memory of 2276	2124	5313e2143d6c1f978638038f19f29e6b.exe	40
PID 2124 wrote to memory of 2276	2124	5313e2143d6c1f978638038f19f29e6b.exe	40
PID 2276 wrote to memory of 2088	2276	cmd.exe	42
PID 2276 wrote to memory of 2088	2276	cmd.exe	42
PID 2276 wrote to memory of 2088	2276	cmd.exe	42
PID 2276 wrote to memory of 2876	2276	cmd.exe	43
PID 2276 wrote to memory of 2876	2276	cmd.exe	43
PID 2276 wrote to memory of 2876	2276	cmd.exe	43

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\5313e2143d6c1f978638038f19f29e6b.exe
"C:\Users\Admin\AppData\Local\Temp\5313e2143d6c1f978638038f19f29e6b.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\DB8izuZ1vI.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2276
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2088
- - C:\Users\Default\Links\smss.exe
    "C:\Users\Default\Links\smss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2876

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\SendTo\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Users\Admin\SendTo\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2584

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\SendTo\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2808

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2560

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2616

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Users\Default\Links\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3008

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\Default\Links\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Users\Default\Links\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1660

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\DB8izuZ1vI.bat

Filesize
196B

MD5
9cf4bcba3c27321f43a763d94fda5368

SHA1
26f7ed520a74d66fb7f8ba9829fe955a77a4980a

SHA256
101c23e5bfa0d494f714ce696740d7d611fc4a769fe5b8c9aa70f9b282f8ad18

SHA512
4edf1674f6d753c84ccf02dae918adfdcd750f975c52877a9227c2b338d70cf7896f8974aecbd219e559e0095dcdee2e915bece17a156ac87036c6878be8514c

Download Submit
C:\Users\Default\Links\smss.exe

Filesize
1001KB

MD5
5313e2143d6c1f978638038f19f29e6b

SHA1
c70695edf05d60e4726fcdd905ff23248b7ba1dd

SHA256
79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526

SHA512
1b6293810afd89fee0b93a73a6ae73844677f98a7e1cff389637d56dbf908e2f20556765cb95d77156fd704c154f224920bec666deb23b5972b9ed0dcdb4e76b

Download Submit
memory/2124-0-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

Filesize
4KB

Download
memory/2124-1-0x0000000001050000-0x0000000001152000-memory.dmp

Filesize
1.0MB

Download
memory/2124-2-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2124-3-0x00000000001E0000-0x00000000001FC000-memory.dmp

Filesize
112KB

Download
memory/2124-14-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2876-18-0x0000000000990000-0x0000000000A92000-memory.dmp

Filesize
1.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads