dcrat | 553e75e0d6c35cb71667c45af798ceaefd6468961a73562142536fe3e633136e

General

Target

6c7fde4165740cae2be470e3560d4600N.exe
Size

1.7MB
MD5

6c7fde4165740cae2be470e3560d4600
SHA1

5598a613d702d5cf9eb578eab6b28f5d61ff3d63
SHA256

553e75e0d6c35cb71667c45af798ceaefd6468961a73562142536fe3e633136e
SHA512

61fa46b84fedfeb60f1ef2b3f232eca85e1d70dcbde049486614cbb9f5159e2278dd652da7c5f7dc5fd2de1eba4644a5e15af77d4cdf62351cc62134f2d3722f
SSDEEP

24576:Pqfj/pKWIEcpP2WtjiLjrjCv8AAaIJr2CuLpZ6dqCevofVOhZjgw9pmF8wQOToDX:yU1u5yvZABRgNgECevvsc/wQO0Dx

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

Process spawned unexpected child process 6 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	2544	1632	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2560	1632	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2664	1632	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2596	1632	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1260	1632	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2532	1632	schtasks.exe	31

Executes dropped EXE 1 IoCs

pid	Process
2908	6c7fde4165740cae2be470e3560d4600N.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	ip-api.com

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Sidebar\es-ES\csrss.exe	6c7fde4165740cae2be470e3560d4600N.exe
File created	C:\Program Files\Windows Sidebar\es-ES\886983d96e3d3e	6c7fde4165740cae2be470e3560d4600N.exe
File opened for modification	C:\Program Files\Windows Sidebar\es-ES\RCXF626.tmp	6c7fde4165740cae2be470e3560d4600N.exe
File opened for modification	C:\Program Files\Windows Sidebar\es-ES\RCXF627.tmp	6c7fde4165740cae2be470e3560d4600N.exe
File opened for modification	C:\Program Files\Windows Sidebar\es-ES\csrss.exe	6c7fde4165740cae2be470e3560d4600N.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

pid	Process
2544	schtasks.exe
2560	schtasks.exe
2664	schtasks.exe
2596	schtasks.exe
1260	schtasks.exe
2532	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2692	6c7fde4165740cae2be470e3560d4600N.exe
2692	6c7fde4165740cae2be470e3560d4600N.exe
2692	6c7fde4165740cae2be470e3560d4600N.exe
2692	6c7fde4165740cae2be470e3560d4600N.exe
2692	6c7fde4165740cae2be470e3560d4600N.exe
2692	6c7fde4165740cae2be470e3560d4600N.exe
2908	6c7fde4165740cae2be470e3560d4600N.exe
2908	6c7fde4165740cae2be470e3560d4600N.exe
2908	6c7fde4165740cae2be470e3560d4600N.exe
2908	6c7fde4165740cae2be470e3560d4600N.exe
2908	6c7fde4165740cae2be470e3560d4600N.exe
2908	6c7fde4165740cae2be470e3560d4600N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2692	6c7fde4165740cae2be470e3560d4600N.exe
Token: SeDebugPrivilege	2908	6c7fde4165740cae2be470e3560d4600N.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2692 wrote to memory of 2908	2692	6c7fde4165740cae2be470e3560d4600N.exe	38
PID 2692 wrote to memory of 2908	2692	6c7fde4165740cae2be470e3560d4600N.exe	38
PID 2692 wrote to memory of 2908	2692	6c7fde4165740cae2be470e3560d4600N.exe	38

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\6c7fde4165740cae2be470e3560d4600N.exe
"C:\Users\Admin\AppData\Local\Temp\6c7fde4165740cae2be470e3560d4600N.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\6c7fde4165740cae2be470e3560d4600N.exe
  "C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\6c7fde4165740cae2be470e3560d4600N.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2908

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "6c7fde4165740cae2be470e3560d4600N6" /sc MINUTE /mo 14 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\6c7fde4165740cae2be470e3560d4600N.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2544

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "6c7fde4165740cae2be470e3560d4600N" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\6c7fde4165740cae2be470e3560d4600N.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 "6c7fde4165740cae2be470e3560d4600N6" /sc MINUTE /mo 5 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\6c7fde4165740cae2be470e3560d4600N.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Sidebar\es-ES\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\es-ES\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1260

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Sidebar\es-ES\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2532

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:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\6c7fde4165740cae2be470e3560d4600N.exe

Filesize
1.7MB

MD5
6c7fde4165740cae2be470e3560d4600

SHA1
5598a613d702d5cf9eb578eab6b28f5d61ff3d63

SHA256
553e75e0d6c35cb71667c45af798ceaefd6468961a73562142536fe3e633136e

SHA512
61fa46b84fedfeb60f1ef2b3f232eca85e1d70dcbde049486614cbb9f5159e2278dd652da7c5f7dc5fd2de1eba4644a5e15af77d4cdf62351cc62134f2d3722f

Download Submit
memory/2692-8-0x0000000000740000-0x0000000000750000-memory.dmp

Filesize
64KB

Download
memory/2692-10-0x0000000000890000-0x00000000008A0000-memory.dmp

Filesize
64KB

Download
memory/2692-3-0x00000000004D0000-0x00000000004DE000-memory.dmp

Filesize
56KB

Download
memory/2692-4-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/2692-5-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/2692-6-0x0000000000710000-0x000000000072C000-memory.dmp

Filesize
112KB

Download
memory/2692-2-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/2692-7-0x0000000000730000-0x0000000000740000-memory.dmp

Filesize
64KB

Download
memory/2692-9-0x0000000000860000-0x0000000000872000-memory.dmp

Filesize
72KB

Download
memory/2692-0-0x000007FEF61F3000-0x000007FEF61F4000-memory.dmp

Filesize
4KB

Download
memory/2692-11-0x0000000000870000-0x000000000087E000-memory.dmp

Filesize
56KB

Download
memory/2692-12-0x0000000000880000-0x000000000088A000-memory.dmp

Filesize
40KB

Download
memory/2692-1-0x00000000008B0000-0x0000000000A6E000-memory.dmp

Filesize
1.7MB

Download
memory/2692-47-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/2692-55-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp

Filesize
9.9MB

Download
memory/2908-54-0x0000000000C90000-0x0000000000E4E000-memory.dmp

Filesize
1.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads