dcrat | 84ad4547b1b6eacb1fa94a456851380b0cdf04a30d5461cf9c7e5dcededd8a1a

General

Target

8FF7B0B0C35C393F308F987171721BA0.exe
Size

319KB
MD5

8ff7b0b0c35c393f308f987171721ba0
SHA1

b5cf15448f31f9406ae56863569518a203c3bd7c
SHA256

84ad4547b1b6eacb1fa94a456851380b0cdf04a30d5461cf9c7e5dcededd8a1a
SHA512

310afccd6994f9632b5f0387fd189b94f31f07e33cd1404527553130a3f65e81cbcc68c96926e9cf8c8679d278beb3bc96c98ad68a849195e1b51b7977c4fb37

Score

10^/10

dcrat infostealer rat spyware stealer

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

DCRat Payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x000100000001ab7d-129.dat	dcrat
behavioral2/files/0x000100000001ab7d-130.dat	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2072	WmiPrvSE.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 2 IoCs

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

flow	ioc
12	ipinfo.io
13	ipinfo.io

Drops file in System32 directory 7 IoCs

description	ioc	Process
File created	C:\Windows\System32\wbem\WEMSAL_WmiProvider\Zi7wkUpBKE	WmiPrvSE.exe
File opened for modification	C:\Windows\System32\wbem\WEMSAL_WmiProvider\Zi7wkUpBKE	WmiPrvSE.exe
File created	C:\Windows\System32\wbem\WEMSAL_WmiProvider\fFZGReN74Z	WmiPrvSE.exe
File created	C:\Windows\System32\wbem\WEMSAL_WmiProvider\wZD39euoTD	WmiPrvSE.exe
File created	C:\Windows\System32\wbem\WEMSAL_WmiProvider\WmiPrvSE.exe	8FF7B0B0C35C393F308F987171721BA0.exe
File created	C:\Windows\System32\wbem\WEMSAL_WmiProvider\24dbde2999530ef5fd907494bc374d663924116c	8FF7B0B0C35C393F308F987171721BA0.exe
File created	C:\Windows\System32\wbem\WEMSAL_WmiProvider\ksZju1OCgv	WmiPrvSE.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Multimedia Platform\560854153607923c4c5f107085a7db67be01f252	8FF7B0B0C35C393F308F987171721BA0.exe
File created	C:\Program Files\Windows Multimedia Platform\wininit.exe	8FF7B0B0C35C393F308F987171721BA0.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 7 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1296	schtasks.exe
3460	schtasks.exe
1816	schtasks.exe
3404	schtasks.exe
3308	schtasks.exe
2072	schtasks.exe
1292	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings	8FF7B0B0C35C393F308F987171721BA0.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4004	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3944	8FF7B0B0C35C393F308F987171721BA0.exe
2072	WmiPrvSE.exe
2072	WmiPrvSE.exe
2072	WmiPrvSE.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2072	WmiPrvSE.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3944	8FF7B0B0C35C393F308F987171721BA0.exe
Token: SeDebugPrivilege	2072	WmiPrvSE.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2072	WmiPrvSE.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 3944 wrote to memory of 1296	3944	8FF7B0B0C35C393F308F987171721BA0.exe	76
PID 3944 wrote to memory of 1296	3944	8FF7B0B0C35C393F308F987171721BA0.exe	76
PID 3944 wrote to memory of 3460	3944	8FF7B0B0C35C393F308F987171721BA0.exe	79
PID 3944 wrote to memory of 3460	3944	8FF7B0B0C35C393F308F987171721BA0.exe	79
PID 3944 wrote to memory of 1816	3944	8FF7B0B0C35C393F308F987171721BA0.exe	82
PID 3944 wrote to memory of 1816	3944	8FF7B0B0C35C393F308F987171721BA0.exe	82
PID 3944 wrote to memory of 3404	3944	8FF7B0B0C35C393F308F987171721BA0.exe	84
PID 3944 wrote to memory of 3404	3944	8FF7B0B0C35C393F308F987171721BA0.exe	84
PID 3944 wrote to memory of 3308	3944	8FF7B0B0C35C393F308F987171721BA0.exe	86
PID 3944 wrote to memory of 3308	3944	8FF7B0B0C35C393F308F987171721BA0.exe	86
PID 3944 wrote to memory of 2072	3944	8FF7B0B0C35C393F308F987171721BA0.exe	88
PID 3944 wrote to memory of 2072	3944	8FF7B0B0C35C393F308F987171721BA0.exe	88
PID 3944 wrote to memory of 1292	3944	8FF7B0B0C35C393F308F987171721BA0.exe	90
PID 3944 wrote to memory of 1292	3944	8FF7B0B0C35C393F308F987171721BA0.exe	90
PID 3944 wrote to memory of 3212	3944	8FF7B0B0C35C393F308F987171721BA0.exe	92
PID 3944 wrote to memory of 3212	3944	8FF7B0B0C35C393F308F987171721BA0.exe	92
PID 3212 wrote to memory of 2448	3212	cmd.exe	94
PID 3212 wrote to memory of 2448	3212	cmd.exe	94
PID 3212 wrote to memory of 4004	3212	cmd.exe	95
PID 3212 wrote to memory of 4004	3212	cmd.exe	95
PID 3212 wrote to memory of 2072	3212	cmd.exe	96
PID 3212 wrote to memory of 2072	3212	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\8FF7B0B0C35C393F308F987171721BA0.exe
"C:\Users\Admin\AppData\Local\Temp\8FF7B0B0C35C393F308F987171721BA0.exe"
1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3944
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "sihost" /sc ONLOGON /tr "'C:\PerfLogs\sihost.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1296
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Multimedia Platform\wininit.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3460
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "audiodg" /sc ONLOGON /tr "'C:\Documents and Settings\audiodg.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1816
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\odt\WmiPrvSE.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3404
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Default User\RuntimeBroker.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3308
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\odt\wininit.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2072
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\WEMSAL_WmiProvider\WmiPrvSE.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1292
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\d6iJFlziiG.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3212
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2448
- - C:\Windows\system32\PING.EXE
    ping -n 5 localhost
    3⤵
    - Runs ping.exe
    PID:4004
- - C:\Windows\System32\wbem\WEMSAL_WmiProvider\WmiPrvSE.exe
    "C:\Windows\System32\wbem\WEMSAL_WmiProvider\WmiPrvSE.exe"
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2072

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2072-134-0x0000023FA8500000-0x0000023FA8501000-memory.dmp

Filesize
4KB

Download
memory/2072-133-0x0000023FA8720000-0x0000023FA8722000-memory.dmp

Filesize
8KB

Download
memory/3944-119-0x000002092A990000-0x000002092A992000-memory.dmp

Filesize
8KB

Download
memory/3944-114-0x0000020928CE0000-0x0000020928CE1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads