dcrat | ba3402759b71df5f82271b3311fb3229a9ef08298178dd63edd8dea842b42798

General

Target

5c46eb00a3f517f8a1bddda0d44ef6f1.exe
Size

1.1MB
MD5

5c46eb00a3f517f8a1bddda0d44ef6f1
SHA1

716a518ec7c084161bfc2d7f212c1196e9a3159f
SHA256

ba3402759b71df5f82271b3311fb3229a9ef08298178dd63edd8dea842b42798
SHA512

8fb50b833a3ce919bc4fcbc06214adf68dc8e7a0c967b729958ac002973159078507b03defc2055522aaa38e46cbf953a75dc669c463b33f54a8feb802b7364e
SSDEEP

24576:0hBpEOYFciGLT5KIM+K1BVRSO6lGd4LmujFS9jF:0hXEtcKp+mVRxMGd+Hjw

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 6 IoCs

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

Processes:

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

description	pid	pid_target	process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2120	1324	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1572	1324	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	708	1324	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2764	1324	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4936	1324	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4352	1324	schtasks.exe

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral2/memory/1020-1-0x0000000000140000-0x0000000000266000-memory.dmp	dcrat
C:\Windows\addins\SppExtComObj.exe	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

Processes:

5c46eb00a3f517f8a1bddda0d44ef6f1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	5c46eb00a3f517f8a1bddda0d44ef6f1.exe

Executes dropped EXE 1 IoCs

Processes:

SppExtComObj.exe

pid process

5116 SppExtComObj.exe

pid	process
5116	SppExtComObj.exe

Drops file in Program Files directory 2 IoCs

Processes:

5c46eb00a3f517f8a1bddda0d44ef6f1.exe

description	ioc	process
File created	C:\Program Files\Windows Defender\es-ES\5c46eb00a3f517f8a1bddda0d44ef6f1.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Program Files\Windows Defender\es-ES\9b395c73c591da	5c46eb00a3f517f8a1bddda0d44ef6f1.exe

Drops file in Windows directory 3 IoCs

Processes:

5c46eb00a3f517f8a1bddda0d44ef6f1.exe

description	ioc	process
File created	C:\Windows\addins\SppExtComObj.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File opened for modification	C:\Windows\addins\SppExtComObj.exe	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
File created	C:\Windows\addins\e1ef82546f0b02	5c46eb00a3f517f8a1bddda0d44ef6f1.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 6 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.exe

pid process

4352 schtasks.exe
2120 schtasks.exe
1572 schtasks.exe
708 schtasks.exe
2764 schtasks.exe
4936 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

5c46eb00a3f517f8a1bddda0d44ef6f1.exeSppExtComObj.exe

pid process

1020 5c46eb00a3f517f8a1bddda0d44ef6f1.exe
5116 SppExtComObj.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

5c46eb00a3f517f8a1bddda0d44ef6f1.exeSppExtComObj.exe

description pid process

Token: SeDebugPrivilege 1020 5c46eb00a3f517f8a1bddda0d44ef6f1.exe
Token: SeDebugPrivilege 5116 SppExtComObj.exe

pid	process
4352	schtasks.exe
2120	schtasks.exe
1572	schtasks.exe
708	schtasks.exe
2764	schtasks.exe
4936	schtasks.exe

pid	process
1020	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
5116	SppExtComObj.exe

description	pid	process
Token: SeDebugPrivilege	1020	5c46eb00a3f517f8a1bddda0d44ef6f1.exe
Token: SeDebugPrivilege	5116	SppExtComObj.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

5c46eb00a3f517f8a1bddda0d44ef6f1.exe

description	pid	process	target process
PID 1020 wrote to memory of 5116	1020	5c46eb00a3f517f8a1bddda0d44ef6f1.exe	SppExtComObj.exe
PID 1020 wrote to memory of 5116	1020	5c46eb00a3f517f8a1bddda0d44ef6f1.exe	SppExtComObj.exe

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\5c46eb00a3f517f8a1bddda0d44ef6f1.exe
"C:\Users\Admin\AppData\Local\Temp\5c46eb00a3f517f8a1bddda0d44ef6f1.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:1020
- C:\Windows\addins\SppExtComObj.exe
  "C:\Windows\addins\SppExtComObj.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5116

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 9 /tr "'C:\Windows\addins\SppExtComObj.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2120

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\addins\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1572

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 12 /tr "'C:\Windows\addins\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:708

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "5c46eb00a3f517f8a1bddda0d44ef6f15" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Defender\es-ES\5c46eb00a3f517f8a1bddda0d44ef6f1.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "5c46eb00a3f517f8a1bddda0d44ef6f1" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\es-ES\5c46eb00a3f517f8a1bddda0d44ef6f1.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4936

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "5c46eb00a3f517f8a1bddda0d44ef6f15" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Defender\es-ES\5c46eb00a3f517f8a1bddda0d44ef6f1.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4352

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:\Windows\addins\SppExtComObj.exe

Filesize
1.1MB

MD5
5c46eb00a3f517f8a1bddda0d44ef6f1

SHA1
716a518ec7c084161bfc2d7f212c1196e9a3159f

SHA256
ba3402759b71df5f82271b3311fb3229a9ef08298178dd63edd8dea842b42798

SHA512
8fb50b833a3ce919bc4fcbc06214adf68dc8e7a0c967b729958ac002973159078507b03defc2055522aaa38e46cbf953a75dc669c463b33f54a8feb802b7364e

Download Submit
memory/1020-0-0x00007FFB69303000-0x00007FFB69305000-memory.dmp

Filesize
8KB

Download
memory/1020-1-0x0000000000140000-0x0000000000266000-memory.dmp

Filesize
1.1MB

Download
memory/1020-2-0x00007FFB69300000-0x00007FFB69DC1000-memory.dmp

Filesize
10.8MB

Download
memory/1020-3-0x00000000022E0000-0x00000000022FC000-memory.dmp

Filesize
112KB

Download
memory/1020-5-0x000000001AE90000-0x000000001AEA6000-memory.dmp

Filesize
88KB

Download
memory/1020-4-0x000000001B530000-0x000000001B580000-memory.dmp

Filesize
320KB

Download
memory/1020-21-0x00007FFB69300000-0x00007FFB69DC1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads