dcrat | 37393231ee6c2f1e4e81bb820867302f509abe5108d7e6eac891fe1ab4b66ca5

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:15

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

b6baedc86ebdd4c9c3cc812f509f777b.exe
Size

999KB
MD5

b6baedc86ebdd4c9c3cc812f509f777b
SHA1

1dfd321978faba568b114ef07a663e799899b0c4
SHA256

7197f07c5612e994e7f66a40975e6ebc328847ab957ba0c84625e1c9f4543c69
SHA512

6b292e829209cfc6e2f7c7cd2c4afc4ce77cd36042e9af9494ad934f1ff840f7050511c09a54fcf9b4e2fafd27492ae7ba295bf8783e4158ed369b4c20440aa1
SSDEEP

12288:H9pLLk45WSSY1BX6f4bIS7rMNetPfC9Vs6IFGs0jxAqXj9xPSI0dzNgCoD7WX+Iu:H9pP5WS3lrMNyC9TJPCXBi

Score

10^/10

dcrat infostealer persistence 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

Modifies WinLogon for persistence 2 TTPs 4 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Application Data\\lsm.exe\", \"C:\\Users\\Admin\\Searches\\OSPPSVC.exe\""	b6baedc86ebdd4c9c3cc812f509f777b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Application Data\\lsm.exe\", \"C:\\Users\\Admin\\Searches\\OSPPSVC.exe\", \"C:\\ProgramData\\Documents\\Idle.exe\""	b6baedc86ebdd4c9c3cc812f509f777b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Application Data\\lsm.exe\", \"C:\\Users\\Admin\\Searches\\OSPPSVC.exe\", \"C:\\ProgramData\\Documents\\Idle.exe\", \"C:\\Users\\Default\\Videos\\sppsvc.exe\""	b6baedc86ebdd4c9c3cc812f509f777b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\Application Data\\lsm.exe\""	b6baedc86ebdd4c9c3cc812f509f777b.exe

Process spawned unexpected child process 16 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	2712	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1916	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3016	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2616	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2840	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2744	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	856	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2020	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2376	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2168	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2060	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2764	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2560	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2288	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	308	2900	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1236	2900	schtasks.exe	30

Executes dropped EXE 1 IoCs

pid	Process
696	lsm.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\ProgramData\\Application Data\\lsm.exe\""	b6baedc86ebdd4c9c3cc812f509f777b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\Users\\Admin\\Searches\\OSPPSVC.exe\""	b6baedc86ebdd4c9c3cc812f509f777b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Idle = "\"C:\\ProgramData\\Documents\\Idle.exe\""	b6baedc86ebdd4c9c3cc812f509f777b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Users\\Default\\Videos\\sppsvc.exe\""	b6baedc86ebdd4c9c3cc812f509f777b.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 16 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2020	schtasks.exe
2060	schtasks.exe
2744	schtasks.exe
2560	schtasks.exe
2288	schtasks.exe
308	schtasks.exe
2376	schtasks.exe
2712	schtasks.exe
2840	schtasks.exe
856	schtasks.exe
2168	schtasks.exe
2764	schtasks.exe
1236	schtasks.exe
1916	schtasks.exe
3016	schtasks.exe
2616	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2732	b6baedc86ebdd4c9c3cc812f509f777b.exe
2732	b6baedc86ebdd4c9c3cc812f509f777b.exe
2732	b6baedc86ebdd4c9c3cc812f509f777b.exe
2732	b6baedc86ebdd4c9c3cc812f509f777b.exe
2732	b6baedc86ebdd4c9c3cc812f509f777b.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2732	b6baedc86ebdd4c9c3cc812f509f777b.exe
Token: SeDebugPrivilege	696	lsm.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 696	2732	b6baedc86ebdd4c9c3cc812f509f777b.exe	47
PID 2732 wrote to memory of 696	2732	b6baedc86ebdd4c9c3cc812f509f777b.exe	47
PID 2732 wrote to memory of 696	2732	b6baedc86ebdd4c9c3cc812f509f777b.exe	47

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\b6baedc86ebdd4c9c3cc812f509f777b.exe
"C:\Users\Admin\AppData\Local\Temp\b6baedc86ebdd4c9c3cc812f509f777b.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2732
- C:\ProgramData\Application Data\lsm.exe
  "C:\ProgramData\Application Data\lsm.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:696

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc MINUTE /mo 5 /tr "'C:\ProgramData\Application Data\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2712

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\ProgramData\Application Data\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONSTART /tr "'C:\ProgramData\Application Data\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2840

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 7 /tr "'C:\ProgramData\Application Data\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2616

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\Searches\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Users\Admin\Searches\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONSTART /tr "'C:\Users\Admin\Searches\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Searches\OSPPSVC.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2020

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc MINUTE /mo 9 /tr "'C:\ProgramData\Documents\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\ProgramData\Documents\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2060

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONSTART /tr "'C:\ProgramData\Documents\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2168

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\ProgramData\Documents\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2376

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Videos\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1236

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Users\Default\Videos\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONSTART /tr "'C:\Users\Default\Videos\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2288

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Users\Default\Videos\sppsvc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\RCX35FF.tmp

Filesize
999KB

MD5
b6baedc86ebdd4c9c3cc812f509f777b

SHA1
1dfd321978faba568b114ef07a663e799899b0c4

SHA256
7197f07c5612e994e7f66a40975e6ebc328847ab957ba0c84625e1c9f4543c69

SHA512
6b292e829209cfc6e2f7c7cd2c4afc4ce77cd36042e9af9494ad934f1ff840f7050511c09a54fcf9b4e2fafd27492ae7ba295bf8783e4158ed369b4c20440aa1

Download Submit
C:\Users\Public\Documents\Idle.exe

Filesize
999KB

MD5
704687bde4d1946d607c1a6f4e7873f6

SHA1
78f966934ec1e62ab8676dfb2ec09aae02cafb08

SHA256
1eddff1c9743d9dfda5dd76e00176cec609d76c43bd7c65cd6060ae983ee08b9

SHA512
2659a3e6cb9261fbeb3acb17ab8056bc9cac2dfb3d2c2767cd3fb9ac4ecd1ba9b3599e8cf8d70ea321735158396ff18f7682e90a7ca9d0286918434281b49889

Download Submit
memory/696-78-0x0000000001260000-0x0000000001360000-memory.dmp

Filesize
1024KB

Download
memory/2732-8-0x0000000000690000-0x000000000069E000-memory.dmp

Filesize
56KB

Download
memory/2732-3-0x00000000004B0000-0x00000000004CC000-memory.dmp

Filesize
112KB

Download
memory/2732-7-0x0000000000680000-0x000000000068C000-memory.dmp

Filesize
48KB

Download
memory/2732-0-0x000007FEF5D33000-0x000007FEF5D34000-memory.dmp

Filesize
4KB

Download
memory/2732-6-0x0000000000670000-0x0000000000680000-memory.dmp

Filesize
64KB

Download
memory/2732-9-0x00000000006A0000-0x00000000006AC000-memory.dmp

Filesize
48KB

Download
memory/2732-5-0x0000000000660000-0x0000000000670000-memory.dmp

Filesize
64KB

Download
memory/2732-10-0x00000000006B0000-0x00000000006BC000-memory.dmp

Filesize
48KB

Download
memory/2732-4-0x00000000004D0000-0x00000000004E0000-memory.dmp

Filesize
64KB

Download
memory/2732-2-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

Filesize
9.9MB

Download
memory/2732-77-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

Filesize
9.9MB

Download
memory/2732-1-0x00000000000F0000-0x00000000001F0000-memory.dmp

Filesize
1024KB

Download