dcrat | 8daf7dcdf256d7de40d33e5550dc5e8bbf887b8c4b7f49c79a15c96dad867f82

Analysis

max time kernel
144s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23-11-2024 23:58

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General

Target

F4620C0AFA8E21897509B2E7215097F5.exe
Size

2.1MB
MD5

f4620c0afa8e21897509b2e7215097f5
SHA1

af216ca6105e271a3fb45a23c10ee7cf3158b7e1
SHA256

8daf7dcdf256d7de40d33e5550dc5e8bbf887b8c4b7f49c79a15c96dad867f82
SHA512

68b875acc06d9c3796f49377b5b25a5e8b9a380221eea59e4274249ca7d2bff10c3fc5edf50eae5da726afea882e0e777af86af25be7b57c8fbfd70448d8d7dd
SSDEEP

49152:IBJz3c6UY0hj8eu32ILwfhNE5I6OrLCXLdsN6:yh3cvY0Z8pGWwfhyxOrUsN6

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.

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2728	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2652	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2040	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	892	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2928	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2964	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2032	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2696	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2996	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1336	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1996	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1912	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1260	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1044	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3036	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2640	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2568	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2188	2596	schtasks.exe	35

Executes dropped EXE 2 IoCs

Processes:

Medal.exeaudiodg.exe

pid	Process
2884	Medal.exe
2312	audiodg.exe

Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid	Process
2764	cmd.exe
2764	cmd.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 2 IoCs

Processes:

Medal.exe

description	ioc	Process
File created	C:\Program Files (x86)\Internet Explorer\en-US\csrss.exe	Medal.exe
File created	C:\Program Files (x86)\Internet Explorer\en-US\886983d96e3d3e	Medal.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

Processes:

F4620C0AFA8E21897509B2E7215097F5.exeWScript.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F4620C0AFA8E21897509B2E7215097F5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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

Processes:

pid	Process
2568	schtasks.exe
2928	schtasks.exe
2964	schtasks.exe
2032	schtasks.exe
2640	schtasks.exe
3036	schtasks.exe
2040	schtasks.exe
2996	schtasks.exe
1996	schtasks.exe
1044	schtasks.exe
1260	schtasks.exe
2188	schtasks.exe
2728	schtasks.exe
2696	schtasks.exe
1336	schtasks.exe
1912	schtasks.exe
2652	schtasks.exe
892	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Medal.exeaudiodg.exe

pid	Process
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2884	Medal.exe
2312	audiodg.exe
2312	audiodg.exe
2312	audiodg.exe
2312	audiodg.exe
2312	audiodg.exe
2312	audiodg.exe
2312	audiodg.exe
2312	audiodg.exe
2312	audiodg.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

audiodg.exe

pid	Process
2312	audiodg.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Medal.exeaudiodg.exe

description	pid	Process
Token: SeDebugPrivilege	2884	Medal.exe
Token: SeDebugPrivilege	2312	audiodg.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

F4620C0AFA8E21897509B2E7215097F5.exeWScript.execmd.exeMedal.execmd.exe

description	pid	Process	procid_target
PID 1732 wrote to memory of 2284	1732	F4620C0AFA8E21897509B2E7215097F5.exe	30
PID 1732 wrote to memory of 2284	1732	F4620C0AFA8E21897509B2E7215097F5.exe	30
PID 1732 wrote to memory of 2284	1732	F4620C0AFA8E21897509B2E7215097F5.exe	30
PID 1732 wrote to memory of 2284	1732	F4620C0AFA8E21897509B2E7215097F5.exe	30
PID 2284 wrote to memory of 2764	2284	WScript.exe	32
PID 2284 wrote to memory of 2764	2284	WScript.exe	32
PID 2284 wrote to memory of 2764	2284	WScript.exe	32
PID 2284 wrote to memory of 2764	2284	WScript.exe	32
PID 2764 wrote to memory of 2884	2764	cmd.exe	34
PID 2764 wrote to memory of 2884	2764	cmd.exe	34
PID 2764 wrote to memory of 2884	2764	cmd.exe	34
PID 2764 wrote to memory of 2884	2764	cmd.exe	34
PID 2884 wrote to memory of 1268	2884	Medal.exe	54
PID 2884 wrote to memory of 1268	2884	Medal.exe	54
PID 2884 wrote to memory of 1268	2884	Medal.exe	54
PID 1268 wrote to memory of 2272	1268	cmd.exe	56
PID 1268 wrote to memory of 2272	1268	cmd.exe	56
PID 1268 wrote to memory of 2272	1268	cmd.exe	56
PID 1268 wrote to memory of 444	1268	cmd.exe	57
PID 1268 wrote to memory of 444	1268	cmd.exe	57
PID 1268 wrote to memory of 444	1268	cmd.exe	57
PID 1268 wrote to memory of 2312	1268	cmd.exe	58
PID 1268 wrote to memory of 2312	1268	cmd.exe	58
PID 1268 wrote to memory of 2312	1268	cmd.exe	58

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\F4620C0AFA8E21897509B2E7215097F5.exe
"C:\Users\Admin\AppData\Local\Temp\F4620C0AFA8E21897509B2E7215097F5.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Medal\LziQ5Qlyzu0f0C5NtfHJq0w.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2284
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Medal\Fua65ZRdZNJ5OJAqSXb7513NtPonCq4dK3Ubpg1B.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2764
  - - C:\Medal\Medal.exe
      "C:\Medal/Medal.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2884
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\hSkQkWubi3.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1268
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:2272
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:444
      - C:\Users\Public\Favorites\audiodg.exe
        
        "C:\Users\Public\Favorites\audiodg.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:2312

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Internet Explorer\en-US\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\en-US\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2652

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Internet Explorer\en-US\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:892

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2928

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 6 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2964

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Favorites\audiodg.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\Users\Public\Favorites\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2696

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 11 /tr "'C:\Users\Public\Favorites\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2996

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Medal\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1336

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Medal\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1996

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Medal\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1912

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Medal\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1260

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Medal\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1044

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Medal\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3036

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 8 /tr "'C:\Medal\Medal.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Medal" /sc ONLOGON /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2568

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 12 /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2188

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

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Downloads

C:\Medal\Fua65ZRdZNJ5OJAqSXb7513NtPonCq4dK3Ubpg1B.bat

Filesize
63B

MD5
e24619181276af563705f4b1bed29490

SHA1
fddac27290319f69543f5330fe97c122a8a01376

SHA256
eee937e02edcd36de3ed7658c9ad9d79844502c8553a7c244b2b154aa9ffec05

SHA512
1898a5e2a52f2f34466dfd9e1b1149b36052874b6be432dd9301ecfa6bc3a964dca6980b8db54ddcf8ef24a95792efcaffeb09aceb7a04304a0d18f4d0ce0591

Download Submit
C:\Medal\LziQ5Qlyzu0f0C5NtfHJq0w.vbe

Filesize
224B

MD5
96d43070e1e39d421c53a2f8dca13fc6

SHA1
07417cccceddbf8d5f5b48dec0b2e08d53a4754f

SHA256
0dab986e5c533631946e27cdbb5147e68b9eb3008c1add60d21a59cd7d964314

SHA512
9fc0ee5ac42bca7c7ee7584baa5be6907fc750378d037d56e075a21c4fe8eaeb3efac3e9fb6087a70a6ad01dcebf05d2462f2463daa8063b4047c11e5364d398

Download Submit
C:\Medal\Medal.exe

Filesize
1.8MB

MD5
4f66bbfed3a524398bd0267ed974ccbc

SHA1
b2567397dc823412d87a23428c7833ff74586b7d

SHA256
fa05b7f28eb1df0447998b89a08aa96453b0f3240c31489900d178862eaa80d8

SHA512
bc4de61adb5f56c66043a2617ebfcc9f4e82d36e48dbdc9178695f9466d554eb364d69829490ff43100e8cb457ce7e78b2e277a3cf1733edf32c0154e6f56d9f

Download Submit
C:\Users\Admin\AppData\Local\Temp\hSkQkWubi3.bat

Filesize
213B

MD5
0a8f319862bd3952c7874e8c94a2c092

SHA1
149349c068cae1ecbc4756cf5884723b7f6917bd

SHA256
f5ee37890802b0fda6096b74a51a3b68ffd6148fcb9d7ef8ee0ce9b146b0342b

SHA512
5bdf6b4a13262b9b6d0b5c5aaad72f51c0bb93ee777330417323e974de183c207aa36df40dbaa7a61ca26400b8d501b10bb27bfbe6de2a162beb1fd26a35b9be

Download Submit
memory/2312-40-0x0000000000160000-0x000000000033E000-memory.dmp

Filesize
1.9MB

Download
memory/2884-13-0x0000000000030000-0x000000000020E000-memory.dmp

Filesize
1.9MB

Download
memory/2884-15-0x0000000000370000-0x000000000037E000-memory.dmp

Filesize
56KB

Download
memory/2884-17-0x00000000003A0000-0x00000000003BC000-memory.dmp

Filesize
112KB

Download
memory/2884-19-0x00000000003C0000-0x00000000003D8000-memory.dmp

Filesize
96KB

Download
memory/2884-21-0x0000000000380000-0x000000000038E000-memory.dmp

Filesize
56KB

Download