dcrat | 4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0

Analysis

max time kernel
116s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11-12-2024 08:09

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General

Target

4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe
Size

2.1MB
MD5

0e0afa05a99d26d55a9df6876eee479f
SHA1

652fe26e32763a493f04e61c5a5d36c628217ef8
SHA256

4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0
SHA512

bc2b23ed0307f7cd81514ff8bfe83316e1b27b6dbd69a08ca0d4618e6363dd3de5d91b1d4f38b059c73c487867c5980b7e7c49c920672589273a140728510cfc
SSDEEP

24576:2TbBv5rUyXVpz/IPMofzXxgF5X1u1seTK44vmrUcSgjBYsRX8TGxj4fY3D5K7TqD:IBJp0PbsCk44v0y4BYgAGxrNKvdVTK

Score

10^/10

dcrat discovery 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 family
dcrat

Process spawned unexpected child process 18 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	4300	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1408	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2224	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4908	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3512	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3952	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	460	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1456	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4796	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3760	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2820	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4664	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2192	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4504	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3080	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4512	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4932	3672	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2936	3672	schtasks.exe	89

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Winver.exe

Executes dropped EXE 2 IoCs

pid	Process
1404	Winver.exe
4360	Winver.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Security\BrowserCore\en-US\SppExtComObj.exe	Winver.exe
File opened for modification	C:\Program Files\Windows Security\BrowserCore\en-US\SppExtComObj.exe	Winver.exe
File created	C:\Program Files\Windows Security\BrowserCore\en-US\e1ef82546f0b02	Winver.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	Winver.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
460	schtasks.exe
4796	schtasks.exe
2820	schtasks.exe
4664	schtasks.exe
3080	schtasks.exe
1408	schtasks.exe
1456	schtasks.exe
4504	schtasks.exe
4932	schtasks.exe
4300	schtasks.exe
2224	schtasks.exe
4908	schtasks.exe
3512	schtasks.exe
3952	schtasks.exe
3760	schtasks.exe
4512	schtasks.exe
2192	schtasks.exe
2936	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
1404	Winver.exe
4360	Winver.exe
4360	Winver.exe
4360	Winver.exe
4360	Winver.exe
4360	Winver.exe
4360	Winver.exe
4360	Winver.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1404	Winver.exe
Token: SeDebugPrivilege	4360	Winver.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 4936	1732	4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe	83
PID 1732 wrote to memory of 4936	1732	4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe	83
PID 1732 wrote to memory of 4936	1732	4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe	83
PID 4936 wrote to memory of 956	4936	WScript.exe	92
PID 4936 wrote to memory of 956	4936	WScript.exe	92
PID 4936 wrote to memory of 956	4936	WScript.exe	92
PID 956 wrote to memory of 1404	956	cmd.exe	94
PID 956 wrote to memory of 1404	956	cmd.exe	94
PID 1404 wrote to memory of 3260	1404	Winver.exe	115
PID 1404 wrote to memory of 3260	1404	Winver.exe	115
PID 3260 wrote to memory of 2752	3260	cmd.exe	117
PID 3260 wrote to memory of 2752	3260	cmd.exe	117
PID 3260 wrote to memory of 4564	3260	cmd.exe	118
PID 3260 wrote to memory of 4564	3260	cmd.exe	118
PID 3260 wrote to memory of 4360	3260	cmd.exe	124
PID 3260 wrote to memory of 4360	3260	cmd.exe	124

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\4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe
"C:\Users\Admin\AppData\Local\Temp\4128341009cc3f617bf5612d7c933bc99c00eea63dfce6f24bbe0ba16f1bb1f0.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ESD\UST9UxLQoHNIIFaYLHo0xhIRlgCNcLzoLb106m2nL.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4936
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\ESD\bQzfgHSGdt2kLcLlkun74cHPltHDXr5Sp886hMeTP.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:956
  - - C:\ESD\Winver.exe
      "C:\ESD/Winver.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Program Files directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1404
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\QXQBc8FYJD.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:3260
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:2752
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:4564
      - C:\ESD\Winver.exe
        
        "C:\ESD\Winver.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4360

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\ESD\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4300

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\ESD\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1408

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\ESD\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2224

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4908

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3512

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3952

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\ESD\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\ESD\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4796

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\ESD\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1456

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 12 /tr "'C:\ESD\conhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\ESD\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2820

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 10 /tr "'C:\ESD\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Security\BrowserCore\en-US\SppExtComObj.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2192

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files\Windows Security\BrowserCore\en-US\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4504

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Security\BrowserCore\en-US\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3080

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WinverW" /sc MINUTE /mo 7 /tr "'C:\ESD\Winver.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4512

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Winver" /sc ONLOGON /tr "'C:\ESD\Winver.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4932

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WinverW" /sc MINUTE /mo 12 /tr "'C:\ESD\Winver.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ESD\UST9UxLQoHNIIFaYLHo0xhIRlgCNcLzoLb106m2nL.vbe

Filesize
222B

MD5
8decf43a92645d8ba4b81696c5e7b1ae

SHA1
dcc9ca8b24e3adf7568eb0f6b7f5cd27f039faf6

SHA256
6ad34bd4e803fad802052423aeab64f4c60dd3ee55a3167425b9640ae24bfea1

SHA512
72e44773f484d2e69ebd41cc555d9a57c833b3930e1f3b0326c90882035e0dc5fb54e8d4ded22cf9f2d28fb502b37b133b7c1c9f9d89b8c21857b569c51ebc17

Download Submit
C:\ESD\Winver.exe

Filesize
1.8MB

MD5
d9ce1032fee5365065a78bbff7267883

SHA1
4c7471b47d4151908dd204303421d7c64cf4c5c6

SHA256
65d26e7c0b856832e88efefe5c2a9e767fb2a7345715bbd0a6e10f9ac2afb520

SHA512
0455364fa91c07da6fecbfb3e3fdbbbcb909e3176b5b151e3653f8b8ebffc02e14fb3471245df479b83f90cd2e1142bcff82b80555cfb3df113696b2925d9435

Download Submit
C:\ESD\bQzfgHSGdt2kLcLlkun74cHPltHDXr5Sp886hMeTP.bat

Filesize
57B

MD5
d1a4f1e326e7dfca62327ea69446dc7c

SHA1
253e264c90cbd15836d8c3a1eab3c26756d94047

SHA256
ea091556a5dbab314a6029817a9db64f9b8adc7afb476bbbb11aec0c227f0de2

SHA512
3d4624c169297b50329a4e13f3f559a7a1f02112f6482e45cfba747dad11c6e6642f1411cec5e92d7890f86fb38702f48c75fec4d24332d43484ad7b9dbf29c8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Winver.exe.log

Filesize
1KB

MD5
af6acd95d59de87c04642509c30e81c1

SHA1
f9549ae93fdb0a5861a79a08f60aa81c4b32377b

SHA256
7521ee2d065a78efcab55a194fbd78492f84b70595f139263875f4ea92b194d6

SHA512
93ab99bcf588fde553de3240e0d2b0cbd4e4bc5ef5e99d53f45a267d7ff30103a80b5a7aa1c52d6eff1e070af0ec82d2c0b8aafb7099742aa16810edc1815c3a

Download Submit
C:\Users\Admin\AppData\Local\Temp\QXQBc8FYJD.bat

Filesize
193B

MD5
10d98b37f07519f397acd6d439c4b63f

SHA1
7bfef0a1e7c93bafc79e67d9ec23986c7fba65ca

SHA256
7ae9767117d6a3bbb1c3f839a3298a45dedd60fe4b4113a8432d64fa58e1721e

SHA512
6fda622d76a94145220902c45c9257ba11fdc7f68ba8ee3f56670f561fbc0b566868da1292842f3711a8960727f0cb1c3f68a8ec70967048b287eb10bec235ef

Download Submit
memory/1404-17-0x0000000002D40000-0x0000000002D5C000-memory.dmp

Filesize
112KB

Download
memory/1404-15-0x0000000002CC0000-0x0000000002CCE000-memory.dmp

Filesize
56KB

Download
memory/1404-18-0x000000001BBE0000-0x000000001BC30000-memory.dmp

Filesize
320KB

Download
memory/1404-20-0x0000000002D60000-0x0000000002D78000-memory.dmp

Filesize
96KB

Download
memory/1404-37-0x000000001BE70000-0x000000001BF19000-memory.dmp

Filesize
676KB

Download
memory/1404-38-0x000000001C320000-0x000000001C4C9000-memory.dmp

Filesize
1.7MB

Download
memory/1404-13-0x0000000000A10000-0x0000000000BE4000-memory.dmp

Filesize
1.8MB

Download
memory/1404-12-0x00007FFFE0333000-0x00007FFFE0335000-memory.dmp

Filesize
8KB

Download
memory/4360-45-0x000000001C3B0000-0x000000001C459000-memory.dmp

Filesize
676KB

Download