dcrat | f896c6618235d320b62e6662673830cbd21d7be057b356eef83aac8f21684b6f

Analysis

max time kernel
136s
max time network
196s
platform
windows7_x64
resource
win7v20210408
submitted
15-06-2021 21:27

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General

Target

048AC151CE97E95A980399E849DAAE95.exe
Size

428KB
MD5

048ac151ce97e95a980399e849daae95
SHA1

3a89733c03e49f7504f6731ee9f626dad52fb369
SHA256

f896c6618235d320b62e6662673830cbd21d7be057b356eef83aac8f21684b6f
SHA512

2532c573dc938ff3401c15bd916312228a09a33a09b92723dcc979c499dbe9078812cc3a73428cc3dc9dd98edf8a0f61a15e3a399acd516a2fda02d4a95dd394

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
behavioral1/files/0x00050000000130b6-76.dat	dcrat
behavioral1/files/0x00050000000130b6-78.dat	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1520	csrss.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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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
6	ipinfo.io
7	ipinfo.io

Drops file in System32 directory 17 IoCs

description	ioc	Process
File created	C:\Windows\System32\rasctrnm\101b941d020240259ca4912829b53995ad543df6	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\wbem\scersop\24dbde2999530ef5fd907494bc374d663924116c	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\pnpts\lsass.exe	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\cryptsvc\560854153607923c4c5f107085a7db67be01f252	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\infocardcpl\886983d96e3d3e31032c679b2d4ea91b6c05afef	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\wbem\sr\WmiPrvSE.exe	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\rasctrnm\lsm.exe	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\dskquota\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\pnpts\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\KBDPL1\lsm.exe	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\KBDPL1\101b941d020240259ca4912829b53995ad543df6	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\wbem\sr\24dbde2999530ef5fd907494bc374d663924116c	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\wbem\scersop\WmiPrvSE.exe	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\cryptsvc\wininit.exe	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\infocardcpl\csrss.exe	048AC151CE97E95A980399E849DAAE95.exe
File opened for modification	C:\Windows\System32\infocardcpl\csrss.exe	048AC151CE97E95A980399E849DAAE95.exe
File created	C:\Windows\System32\dskquota\services.exe	048AC151CE97E95A980399E849DAAE95.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 9 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1544	schtasks.exe
1476	schtasks.exe
1676	schtasks.exe
976	schtasks.exe
820	schtasks.exe
864	schtasks.exe
924	schtasks.exe
1320	schtasks.exe
752	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1856	PING.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1048	048AC151CE97E95A980399E849DAAE95.exe
1048	048AC151CE97E95A980399E849DAAE95.exe
1048	048AC151CE97E95A980399E849DAAE95.exe
1048	048AC151CE97E95A980399E849DAAE95.exe
1048	048AC151CE97E95A980399E849DAAE95.exe
1520	csrss.exe
1520	csrss.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1520	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1048	048AC151CE97E95A980399E849DAAE95.exe
Token: SeDebugPrivilege	1520	csrss.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 1676	1048	048AC151CE97E95A980399E849DAAE95.exe	30
PID 1048 wrote to memory of 1676	1048	048AC151CE97E95A980399E849DAAE95.exe	30
PID 1048 wrote to memory of 1676	1048	048AC151CE97E95A980399E849DAAE95.exe	30
PID 1048 wrote to memory of 752	1048	048AC151CE97E95A980399E849DAAE95.exe	32
PID 1048 wrote to memory of 752	1048	048AC151CE97E95A980399E849DAAE95.exe	32
PID 1048 wrote to memory of 752	1048	048AC151CE97E95A980399E849DAAE95.exe	32
PID 1048 wrote to memory of 976	1048	048AC151CE97E95A980399E849DAAE95.exe	34
PID 1048 wrote to memory of 976	1048	048AC151CE97E95A980399E849DAAE95.exe	34
PID 1048 wrote to memory of 976	1048	048AC151CE97E95A980399E849DAAE95.exe	34
PID 1048 wrote to memory of 820	1048	048AC151CE97E95A980399E849DAAE95.exe	36
PID 1048 wrote to memory of 820	1048	048AC151CE97E95A980399E849DAAE95.exe	36
PID 1048 wrote to memory of 820	1048	048AC151CE97E95A980399E849DAAE95.exe	36
PID 1048 wrote to memory of 864	1048	048AC151CE97E95A980399E849DAAE95.exe	38
PID 1048 wrote to memory of 864	1048	048AC151CE97E95A980399E849DAAE95.exe	38
PID 1048 wrote to memory of 864	1048	048AC151CE97E95A980399E849DAAE95.exe	38
PID 1048 wrote to memory of 924	1048	048AC151CE97E95A980399E849DAAE95.exe	40
PID 1048 wrote to memory of 924	1048	048AC151CE97E95A980399E849DAAE95.exe	40
PID 1048 wrote to memory of 924	1048	048AC151CE97E95A980399E849DAAE95.exe	40
PID 1048 wrote to memory of 1320	1048	048AC151CE97E95A980399E849DAAE95.exe	42
PID 1048 wrote to memory of 1320	1048	048AC151CE97E95A980399E849DAAE95.exe	42
PID 1048 wrote to memory of 1320	1048	048AC151CE97E95A980399E849DAAE95.exe	42
PID 1048 wrote to memory of 1544	1048	048AC151CE97E95A980399E849DAAE95.exe	44
PID 1048 wrote to memory of 1544	1048	048AC151CE97E95A980399E849DAAE95.exe	44
PID 1048 wrote to memory of 1544	1048	048AC151CE97E95A980399E849DAAE95.exe	44
PID 1048 wrote to memory of 1476	1048	048AC151CE97E95A980399E849DAAE95.exe	46
PID 1048 wrote to memory of 1476	1048	048AC151CE97E95A980399E849DAAE95.exe	46
PID 1048 wrote to memory of 1476	1048	048AC151CE97E95A980399E849DAAE95.exe	46
PID 1048 wrote to memory of 1012	1048	048AC151CE97E95A980399E849DAAE95.exe	48
PID 1048 wrote to memory of 1012	1048	048AC151CE97E95A980399E849DAAE95.exe	48
PID 1048 wrote to memory of 1012	1048	048AC151CE97E95A980399E849DAAE95.exe	48
PID 1012 wrote to memory of 1728	1012	cmd.exe	50
PID 1012 wrote to memory of 1728	1012	cmd.exe	50
PID 1012 wrote to memory of 1728	1012	cmd.exe	50
PID 1012 wrote to memory of 1856	1012	cmd.exe	51
PID 1012 wrote to memory of 1856	1012	cmd.exe	51
PID 1012 wrote to memory of 1856	1012	cmd.exe	51
PID 1012 wrote to memory of 1520	1012	cmd.exe	52
PID 1012 wrote to memory of 1520	1012	cmd.exe	52
PID 1012 wrote to memory of 1520	1012	cmd.exe	52

C:\Users\Admin\AppData\Local\Temp\048AC151CE97E95A980399E849DAAE95.exe
"C:\Users\Admin\AppData\Local\Temp\048AC151CE97E95A980399E849DAAE95.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\infocardcpl\csrss.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1676
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\sr\WmiPrvSE.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:752
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\rasctrnm\lsm.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:976
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\scersop\WmiPrvSE.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:820
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\pnpts\lsass.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:864
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\KBDPL1\lsm.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:924
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\dskquota\services.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1320
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\WmiPrvSE.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1544
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\cryptsvc\wininit.exe'" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1476
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\rWR0SxyiNy.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1012
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1728
- - C:\Windows\system32\PING.EXE
    ping -n 5 localhost
    3⤵
    - Runs ping.exe
    PID:1856
- - C:\Windows\System32\infocardcpl\csrss.exe
    "C:\Windows\System32\infocardcpl\csrss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:1520

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1048-62-0x000000001AD60000-0x000000001AD62000-memory.dmp

Filesize
8KB

Download
memory/1048-60-0x0000000000010000-0x0000000000011000-memory.dmp

Filesize
4KB

Download
memory/1520-79-0x0000000000860000-0x0000000000861000-memory.dmp

Filesize
4KB

Download
memory/1520-81-0x000000001B050000-0x000000001B052000-memory.dmp

Filesize
8KB

Download
memory/1520-82-0x00000000001E0000-0x00000000001E7000-memory.dmp

Filesize
28KB

Download
memory/1520-83-0x00000000007B0000-0x00000000007B5000-memory.dmp

Filesize
20KB

Download
memory/1520-84-0x0000000000320000-0x0000000000322000-memory.dmp

Filesize
8KB

Download
memory/1520-85-0x0000000000330000-0x0000000000332000-memory.dmp

Filesize
8KB

Download