dcrat | 2c41808826974a0fdd3c7b27850143cad077a79e0cf69c011da495d6abee679a

Resubmissions

24/11/2024, 19:42

241124-yexs5s1rgq10

24/11/2024, 09:24

241124-lc6xtatmay10

Analysis

max time kernel
146s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24/11/2024, 09:24

Sharing

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Report Analysis Logs

General

Target
F4620C0AFA8E21897509B2E7215097F5.exe
Size 2.1MB
Sample241124-lc6xtatmay
SHA256 8daf7dcdf256d7de40d33e5550dc5e8bbf887b8c4b7f49c79a15c96dad867f82
MD5 f4620c0afa8e21897509b2e7215097f5
SHA1 af216ca6105e271a3fb45a23c10ee7cf3158b7e1
SHA512 68b875acc06d9c3796f49377b5b25a5e8b9a380221eea59e4274249ca7d2bff10c3fc5edf50eae5da726afea882e0e777af86af25be7b57c8fbfd70448d8d7dd
SSDEEP 49152:IBJz3c6UY0hj8eu32ILwfhNE5I6OrLCXLdsN6:yh3cvY0Z8pGWwfhyxOrUsN6
MD5 SHA1 SHA512 SSDEEP

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	5104	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2116	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1172	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4352	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2984	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2940	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2972	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4672	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4456	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	220	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2100	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	528	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1340	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4192	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	988	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	684	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3608	3368	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2912	3368	schtasks.exe	88

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Medal.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	F4620C0AFA8E21897509B2E7215097F5.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
3112	Medal.exe
212	Medal.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 6 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\9e8d7a4ca61bd9	Medal.exe
File created	C:\Program Files (x86)\Windows Mail\Medal.exe	Medal.exe
File created	C:\Program Files (x86)\Windows Mail\55c54f82b9f66a	Medal.exe
File created	C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\dllhost.exe	Medal.exe
File created	C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\5940a34987c991	Medal.exe
File created	C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\RuntimeBroker.exe	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

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

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	F4620C0AFA8E21897509B2E7215097F5.exe
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	Medal.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
2116	schtasks.exe
4672	schtasks.exe
988	schtasks.exe
1172	schtasks.exe
4352	schtasks.exe
2984	schtasks.exe
2940	schtasks.exe
2972	schtasks.exe
4456	schtasks.exe
528	schtasks.exe
684	schtasks.exe
4192	schtasks.exe
3608	schtasks.exe
2912	schtasks.exe
5104	schtasks.exe
220	schtasks.exe
2100	schtasks.exe
1340	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe
3112	Medal.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3112	Medal.exe
Token: SeDebugPrivilege	212	Medal.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4576 wrote to memory of 3148	4576	F4620C0AFA8E21897509B2E7215097F5.exe	83
PID 4576 wrote to memory of 3148	4576	F4620C0AFA8E21897509B2E7215097F5.exe	83
PID 4576 wrote to memory of 3148	4576	F4620C0AFA8E21897509B2E7215097F5.exe	83
PID 3148 wrote to memory of 4568	3148	WScript.exe	97
PID 3148 wrote to memory of 4568	3148	WScript.exe	97
PID 3148 wrote to memory of 4568	3148	WScript.exe	97
PID 4568 wrote to memory of 3112	4568	cmd.exe	99
PID 4568 wrote to memory of 3112	4568	cmd.exe	99
PID 3112 wrote to memory of 1548	3112	Medal.exe	118
PID 3112 wrote to memory of 1548	3112	Medal.exe	118
PID 1548 wrote to memory of 3504	1548	cmd.exe	120
PID 1548 wrote to memory of 3504	1548	cmd.exe	120
PID 1548 wrote to memory of 3308	1548	cmd.exe	121
PID 1548 wrote to memory of 3308	1548	cmd.exe	121
PID 1548 wrote to memory of 212	1548	cmd.exe	123
PID 1548 wrote to memory of 212	1548	cmd.exe	123

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⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4576
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Medal\LziQ5Qlyzu0f0C5NtfHJq0w.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3148
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Medal\Fua65ZRdZNJ5OJAqSXb7513NtPonCq4dK3Ubpg1B.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4568
  - - C:\Medal\Medal.exe
      "C:\Medal/Medal.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:3112
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\kQpGU9tMJo.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1548
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:3504
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:3308
      - C:\Program Files (x86)\Windows Mail\Medal.exe
        
        "C:\Program Files (x86)\Windows Mail\Medal.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Mail\Medal.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Medal" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2116

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Mail\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1172

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4352

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2984

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4672

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4456

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:220

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2100

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:528

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1340

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4192

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:988

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 7 /tr "'C:\Medal\Medal.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:684

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:3608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 11 /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2912

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

Fua65ZRdZNJ5OJAqSXb7513NtPonCq4dK3Ubpg1B.bat

Path C:\Medal\Fua65ZRdZNJ5OJAqSXb7513NtPonCq4dK3Ubpg1B.bat
Size 63B
SHA256 eee937e02edcd36de3ed7658c9ad9d79844502c8553a7c244b2b154aa9ffec05
MD5 e24619181276af563705f4b1bed29490
SHA1 fddac27290319f69543f5330fe97c122a8a01376
SHA512 1898a5e2a52f2f34466dfd9e1b1149b36052874b6be432dd9301ecfa6bc3a964dca6980b8db54ddcf8ef24a95792efcaffeb09aceb7a04304a0d18f4d0ce0591
MD5 SHA1 SHA512

Submit Download

LziQ5Qlyzu0f0C5NtfHJq0w.vbe

Path C:\Medal\LziQ5Qlyzu0f0C5NtfHJq0w.vbe
Size 224B
SHA256 0dab986e5c533631946e27cdbb5147e68b9eb3008c1add60d21a59cd7d964314
MD5 96d43070e1e39d421c53a2f8dca13fc6
SHA1 07417cccceddbf8d5f5b48dec0b2e08d53a4754f
SHA512 9fc0ee5ac42bca7c7ee7584baa5be6907fc750378d037d56e075a21c4fe8eaeb3efac3e9fb6087a70a6ad01dcebf05d2462f2463daa8063b4047c11e5364d398
MD5 SHA1 SHA512

Submit Download

Medal.exe

Path C:\Medal\Medal.exe
Size 1.8MB
SHA256 fa05b7f28eb1df0447998b89a08aa96453b0f3240c31489900d178862eaa80d8
MD5 4f66bbfed3a524398bd0267ed974ccbc
SHA1 b2567397dc823412d87a23428c7833ff74586b7d
SHA512 bc4de61adb5f56c66043a2617ebfcc9f4e82d36e48dbdc9178695f9466d554eb364d69829490ff43100e8cb457ce7e78b2e277a3cf1733edf32c0154e6f56d9f
SSDEEP 49152:q3c6UY0hj8eu32ILwfhNE5I6OrLCXLdsN:q3cvY0Z8pGWwfhyxOrUsN
MD5 SHA1 SHA512 SSDEEP

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Medal.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Medal.exe.log
Size 1KB
SHA256 7521ee2d065a78efcab55a194fbd78492f84b70595f139263875f4ea92b194d6
MD5 af6acd95d59de87c04642509c30e81c1
SHA1 f9549ae93fdb0a5861a79a08f60aa81c4b32377b
SHA512 93ab99bcf588fde553de3240e0d2b0cbd4e4bc5ef5e99d53f45a267d7ff30103a80b5a7aa1c52d6eff1e070af0ec82d2c0b8aafb7099742aa16810edc1815c3a
MD5 SHA1 SHA512

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kQpGU9tMJo.bat

Path C:\Users\Admin\AppData\Local\Temp\kQpGU9tMJo.bat
Size 221B
SHA256 2c1a67e26d0d4213233d1816ca1d9b570aaea95ddffa4d2fea8bdebe6b24d36f
MD5 0096049d684119cf27653957726f839c
SHA1 2035b6df6fd0dfa9e9a7f5e3cbd6d442e21eab23
SHA512 d3139c53fc12648f5c5904d5a02e702c55558ec4031c240be2d759f38c889b04cbfa9b44151bf9f84a8afed72fd6e8331bb3a924d25c1a6dd6897e8535f6875b
MD5 SHA1 SHA512

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memory/212-49-0x0000000003030000-0x0000000003038000-memory.dmp

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memory/3112-17-0x000000001BDC0000-0x000000001BDDC000-memory.dmp

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memory/3112-18-0x000000001BE30000-0x000000001BE80000-memory.dmp

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memory/3112-20-0x000000001BDE0000-0x000000001BDF8000-memory.dmp

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memory/3112-22-0x00000000030A0000-0x00000000030AE000-memory.dmp

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memory/3112-39-0x000000001C4C0000-0x000000001C561000-memory.dmp

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memory/3112-15-0x0000000003050000-0x000000000305E000-memory.dmp

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memory/3112-13-0x0000000000C90000-0x0000000000E6E000-memory.dmp

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memory/3112-12-0x00007FFAB0C63000-0x00007FFAB0C65000-memory.dmp

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