dcrat | db57de1bf0b133303c2325117a527f1586e4bf6af56219391a17095efb09cc76

Analysis

max time kernel
136s
max time network
199s
platform
windows7_x64
resource
win7v20210408
submitted
15-06-2021 17:57

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General

Target

8282EA0066E14F2E7CAF51B7A7D50DC1.exe
Size

1.0MB
MD5

8282ea0066e14f2e7caf51b7a7d50dc1
SHA1

83c03517bb11c4ef01ced0b8df76cb35acbf4fdd
SHA256

db57de1bf0b133303c2325117a527f1586e4bf6af56219391a17095efb09cc76
SHA512

b48e2b9c226f57c50b5e58d716a906e9753f254136697e3e32c5f6aba2c6cc0a3175b0b290630949ddb4229a8eda53e5b62d03c969f5ef187963302ecc9e6841

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 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
\fontruntime\fontruntime.exe	dcrat
C:\fontruntime\fontruntime.exe	dcrat
\fontruntime\fontruntime.exe	dcrat
C:\fontruntime\fontruntime.exe	dcrat
C:\fontruntime\csrss.exe	dcrat
C:\fontruntime\csrss.exe	dcrat

Executes dropped EXE 2 IoCs

Processes:

fontruntime.execsrss.exe

pid process

1548 fontruntime.exe
1564 csrss.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

1576 cmd.exe
1576 cmd.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.

Processes:

flow ioc

5 ipinfo.io
6 ipinfo.io

pid	process
1548	fontruntime.exe
1564	csrss.exe

pid	process
1576	cmd.exe
1576	cmd.exe

flow	ioc
5	ipinfo.io
6	ipinfo.io

Drops file in System32 directory 2 IoCs

Processes:

fontruntime.exe

description	ioc	process
File created	C:\Windows\System32\C_10000\winlogon.exe	fontruntime.exe
File created	C:\Windows\System32\C_10000\cc11b995f2a76da408ea6a601e682e64743153ad	fontruntime.exe

Drops file in Windows directory 3 IoCs

Processes:

fontruntime.exe

description	ioc	process
File created	C:\Windows\Setup\State\lsass.exe	fontruntime.exe
File opened for modification	C:\Windows\Setup\State\lsass.exe	fontruntime.exe
File created	C:\Windows\Setup\State\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	fontruntime.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 5 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

2012 schtasks.exe
1196 schtasks.exe
1692 schtasks.exe
2036 schtasks.exe
1972 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1380 PING.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

fontruntime.execsrss.exe

pid process

1548 fontruntime.exe
1548 fontruntime.exe
1548 fontruntime.exe
1564 csrss.exe
1564 csrss.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

csrss.exe

pid process

1564 csrss.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

fontruntime.execsrss.exe

description pid process

Token: SeDebugPrivilege 1548 fontruntime.exe
Token: SeDebugPrivilege 1564 csrss.exe

pid	process
2012	schtasks.exe
1196	schtasks.exe
1692	schtasks.exe
2036	schtasks.exe
1972	schtasks.exe

pid	process
1380	PING.EXE

pid	process
1548	fontruntime.exe
1548	fontruntime.exe
1548	fontruntime.exe
1564	csrss.exe
1564	csrss.exe

pid	process
1564	csrss.exe

description	pid	process
Token: SeDebugPrivilege	1548	fontruntime.exe
Token: SeDebugPrivilege	1564	csrss.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

8282EA0066E14F2E7CAF51B7A7D50DC1.exeWScript.execmd.exefontruntime.execmd.exe

description	pid	process	target process
PID 652 wrote to memory of 1244	652	8282EA0066E14F2E7CAF51B7A7D50DC1.exe	WScript.exe
PID 652 wrote to memory of 1244	652	8282EA0066E14F2E7CAF51B7A7D50DC1.exe	WScript.exe
PID 652 wrote to memory of 1244	652	8282EA0066E14F2E7CAF51B7A7D50DC1.exe	WScript.exe
PID 652 wrote to memory of 1244	652	8282EA0066E14F2E7CAF51B7A7D50DC1.exe	WScript.exe
PID 1244 wrote to memory of 1576	1244	WScript.exe	cmd.exe
PID 1244 wrote to memory of 1576	1244	WScript.exe	cmd.exe
PID 1244 wrote to memory of 1576	1244	WScript.exe	cmd.exe
PID 1244 wrote to memory of 1576	1244	WScript.exe	cmd.exe
PID 1576 wrote to memory of 1548	1576	cmd.exe	fontruntime.exe
PID 1576 wrote to memory of 1548	1576	cmd.exe	fontruntime.exe
PID 1576 wrote to memory of 1548	1576	cmd.exe	fontruntime.exe
PID 1576 wrote to memory of 1548	1576	cmd.exe	fontruntime.exe
PID 1548 wrote to memory of 2012	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 2012	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 2012	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1196	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1196	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1196	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1692	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1692	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1692	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 2036	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 2036	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 2036	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1972	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1972	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 1972	1548	fontruntime.exe	schtasks.exe
PID 1548 wrote to memory of 920	1548	fontruntime.exe	cmd.exe
PID 1548 wrote to memory of 920	1548	fontruntime.exe	cmd.exe
PID 1548 wrote to memory of 920	1548	fontruntime.exe	cmd.exe
PID 920 wrote to memory of 1664	920	cmd.exe	chcp.com
PID 920 wrote to memory of 1664	920	cmd.exe	chcp.com
PID 920 wrote to memory of 1664	920	cmd.exe	chcp.com
PID 920 wrote to memory of 1380	920	cmd.exe	PING.EXE
PID 920 wrote to memory of 1380	920	cmd.exe	PING.EXE
PID 920 wrote to memory of 1380	920	cmd.exe	PING.EXE
PID 920 wrote to memory of 1564	920	cmd.exe	csrss.exe
PID 920 wrote to memory of 1564	920	cmd.exe	csrss.exe
PID 920 wrote to memory of 1564	920	cmd.exe	csrss.exe

C:\Users\Admin\AppData\Local\Temp\8282EA0066E14F2E7CAF51B7A7D50DC1.exe
"C:\Users\Admin\AppData\Local\Temp\8282EA0066E14F2E7CAF51B7A7D50DC1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:652
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\fontruntime\W54cK365JLW2iwfNl.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1244
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\fontruntime\R8YG6c.bat" "
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1576
  - - C:\fontruntime\fontruntime.exe
      "C:\fontruntime\fontruntime.exe"
      4⤵
      Executes dropped EXE
      Drops file in System32 directory
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1548
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\Setup\State\lsass.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2012
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\34107922-98a6-11eb-a15f-ea91f6580701\wininit.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1196
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\C_10000\winlogon.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1692
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\Default\Downloads\spoolsv.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2036
    - - C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\fontruntime\csrss.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1972
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\fontruntime\GMnfQCBNCG.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:920
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:1664
      - C:\Windows\system32\PING.EXE
        
        ping -n 5 localhost
        6⤵
        Runs ping.exe
        
        PID:1380
      - C:\fontruntime\csrss.exe
        
        "C:\fontruntime\csrss.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:1564

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

C:\fontruntime\GMnfQCBNCG.bat

MD5
e9628d0971b751dcc6a17e2aa41ce99f

SHA1
4912f38b57631ea9226c35d4869d5cdf15687e6d

SHA256
bac9874b6ad4a52f902b37401686397b0b896fab83204ed7add89036c000a3cc

SHA512
9cda11a334d3bc4549b5c073767cbf1afe2606062ca8b143a00d02a1696d8d7ae45016a7299c146f2cc186d862ff064da24ea4c291828ef4498cc5715700d669

Download Submit
C:\fontruntime\R8YG6c.bat

MD5
0549e2d2679f2afeba43cb06997739e6

SHA1
1d14886a786af7bee891fd37f4bf84c81846c19e

SHA256
4b5eb60490f8970c80f17494fe936373855e82d1c29118847c9ddb099fcd2b2f

SHA512
7a18aedea52bb8f75cb2007ab3d53ae89dde128d4a2e42f738d3cea4e8a3e3b0c7852f067b4840f431a5f0863b031e9244b569124f3f0639c69e15ff345655ad

Download Submit
C:\fontruntime\W54cK365JLW2iwfNl.vbe

MD5
a240231e90c46d69d3b65d947b284c4b

SHA1
706a7a426f01a650322ee1afd975795f2c8572a0

SHA256
a71b4327dd6dc56a311005c83db97c649f4011e3f809e2d42b14eb2fcf76e664

SHA512
56a67d4798e499297a85ee8351108f306ad31b6f4ce8cff3c8f7a95b52c5631418465db7c56006fc2587cfee3e46af76a80c87f8d4f77e28c45d1593ae2a687d

Download Submit
C:\fontruntime\csrss.exe

MD5
37657f07638ec9a4f5edca0ef48318e9

SHA1
5e88e4d38743fc4bb6d2e4ada662315fb430bad4

SHA256
6e92e95e249505126d6013bcb0edc77f3de3fd0702999bf4dca7e7449b3702b6

SHA512
e64bfc73f99b6807b462d1c1826819e60a4095e3b40a0507e4423c3e136dd8f4d7657418af4a736b6c5c2470b8bfe5ead857067f1e6f20e8a3f201892095a9f3

Download Submit
C:\fontruntime\csrss.exe

MD5
37657f07638ec9a4f5edca0ef48318e9

SHA1
5e88e4d38743fc4bb6d2e4ada662315fb430bad4

SHA256
6e92e95e249505126d6013bcb0edc77f3de3fd0702999bf4dca7e7449b3702b6

SHA512
e64bfc73f99b6807b462d1c1826819e60a4095e3b40a0507e4423c3e136dd8f4d7657418af4a736b6c5c2470b8bfe5ead857067f1e6f20e8a3f201892095a9f3

Download Submit
C:\fontruntime\fontruntime.exe

MD5
37657f07638ec9a4f5edca0ef48318e9

SHA1
5e88e4d38743fc4bb6d2e4ada662315fb430bad4

SHA256
6e92e95e249505126d6013bcb0edc77f3de3fd0702999bf4dca7e7449b3702b6

SHA512
e64bfc73f99b6807b462d1c1826819e60a4095e3b40a0507e4423c3e136dd8f4d7657418af4a736b6c5c2470b8bfe5ead857067f1e6f20e8a3f201892095a9f3

Download Submit
C:\fontruntime\fontruntime.exe

MD5
37657f07638ec9a4f5edca0ef48318e9

SHA1
5e88e4d38743fc4bb6d2e4ada662315fb430bad4

SHA256
6e92e95e249505126d6013bcb0edc77f3de3fd0702999bf4dca7e7449b3702b6

SHA512
e64bfc73f99b6807b462d1c1826819e60a4095e3b40a0507e4423c3e136dd8f4d7657418af4a736b6c5c2470b8bfe5ead857067f1e6f20e8a3f201892095a9f3

Download Submit
\fontruntime\fontruntime.exe

MD5
37657f07638ec9a4f5edca0ef48318e9

SHA1
5e88e4d38743fc4bb6d2e4ada662315fb430bad4

SHA256
6e92e95e249505126d6013bcb0edc77f3de3fd0702999bf4dca7e7449b3702b6

SHA512
e64bfc73f99b6807b462d1c1826819e60a4095e3b40a0507e4423c3e136dd8f4d7657418af4a736b6c5c2470b8bfe5ead857067f1e6f20e8a3f201892095a9f3

Download Submit
\fontruntime\fontruntime.exe

MD5
37657f07638ec9a4f5edca0ef48318e9

SHA1
5e88e4d38743fc4bb6d2e4ada662315fb430bad4

SHA256
6e92e95e249505126d6013bcb0edc77f3de3fd0702999bf4dca7e7449b3702b6

SHA512
e64bfc73f99b6807b462d1c1826819e60a4095e3b40a0507e4423c3e136dd8f4d7657418af4a736b6c5c2470b8bfe5ead857067f1e6f20e8a3f201892095a9f3

Download Submit
memory/652-59-0x0000000075C31000-0x0000000075C33000-memory.dmp

Filesize
8KB

Download
memory/920-78-0x0000000000000000-mapping.dmp

Download
memory/1196-74-0x0000000000000000-mapping.dmp

Download
memory/1244-60-0x0000000000000000-mapping.dmp

Download
memory/1380-81-0x0000000000000000-mapping.dmp

Download
memory/1548-72-0x000000001B0E0000-0x000000001B0E2000-memory.dmp

Filesize
8KB

Download
memory/1548-68-0x0000000000000000-mapping.dmp

Download
memory/1548-70-0x0000000001090000-0x0000000001091000-memory.dmp

Filesize
4KB

Download
memory/1564-85-0x0000000001180000-0x0000000001181000-memory.dmp

Filesize
4KB

Download
memory/1564-83-0x0000000000000000-mapping.dmp

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memory/1564-87-0x000000001B010000-0x000000001B012000-memory.dmp

Filesize
8KB

Download
memory/1564-88-0x0000000000590000-0x0000000000595000-memory.dmp

Filesize
20KB

Download
memory/1564-89-0x0000000000620000-0x0000000000624000-memory.dmp

Filesize
16KB

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memory/1576-64-0x0000000000000000-mapping.dmp

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memory/1664-80-0x0000000000000000-mapping.dmp

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memory/1692-75-0x0000000000000000-mapping.dmp

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memory/1972-77-0x0000000000000000-mapping.dmp

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memory/2012-73-0x0000000000000000-mapping.dmp

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memory/2036-76-0x0000000000000000-mapping.dmp

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