dcrat | 2c41808826974a0fdd3c7b27850143cad077a79e0cf69c011da495d6abee679a

Resubmissions

24/11/2024, 19:42

241124-yexs5s1rgq10

24/11/2024, 09:24

241124-lc6xtatmay10

Analysis

max time kernel
143s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24/11/2024, 09:24

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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	2292	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2972	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1692	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	992	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1880	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1900	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2876	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1192	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1656	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1216	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	536	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1000	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2172	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2460	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2416	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	632	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1348	2596	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2644	2596	schtasks.exe	35

Executes dropped EXE 2 IoCs

pid	Process
2784	Medal.exe
2392	WMIADAP.exe

Loads dropped DLL 2 IoCs

pid	Process
2716	cmd.exe
2716	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 3 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Media Player\Icons\OSPPSVC.exe	Medal.exe
File created	C:\Program Files\Windows Mail\fr-FR\WMIADAP.exe	Medal.exe
File created	C:\Program Files\Windows Mail\fr-FR\75a57c1bdf437c	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

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
1192	schtasks.exe
1656	schtasks.exe
2460	schtasks.exe
2644	schtasks.exe
2292	schtasks.exe
1692	schtasks.exe
1880	schtasks.exe
536	schtasks.exe
632	schtasks.exe
2972	schtasks.exe
1900	schtasks.exe
2876	schtasks.exe
1000	schtasks.exe
1348	schtasks.exe
992	schtasks.exe
1216	schtasks.exe
2172	schtasks.exe
2416	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2784	Medal.exe
2392	WMIADAP.exe
2392	WMIADAP.exe
2392	WMIADAP.exe
2392	WMIADAP.exe
2392	WMIADAP.exe
2392	WMIADAP.exe
2392	WMIADAP.exe
2392	WMIADAP.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2392	WMIADAP.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2784	Medal.exe
Token: SeDebugPrivilege	2392	WMIADAP.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2948	2084	F4620C0AFA8E21897509B2E7215097F5.exe	30
PID 2084 wrote to memory of 2948	2084	F4620C0AFA8E21897509B2E7215097F5.exe	30
PID 2084 wrote to memory of 2948	2084	F4620C0AFA8E21897509B2E7215097F5.exe	30
PID 2084 wrote to memory of 2948	2084	F4620C0AFA8E21897509B2E7215097F5.exe	30
PID 2948 wrote to memory of 2716	2948	WScript.exe	31
PID 2948 wrote to memory of 2716	2948	WScript.exe	31
PID 2948 wrote to memory of 2716	2948	WScript.exe	31
PID 2948 wrote to memory of 2716	2948	WScript.exe	31
PID 2716 wrote to memory of 2784	2716	cmd.exe	33
PID 2716 wrote to memory of 2784	2716	cmd.exe	33
PID 2716 wrote to memory of 2784	2716	cmd.exe	33
PID 2716 wrote to memory of 2784	2716	cmd.exe	33
PID 2784 wrote to memory of 584	2784	Medal.exe	54
PID 2784 wrote to memory of 584	2784	Medal.exe	54
PID 2784 wrote to memory of 584	2784	Medal.exe	54
PID 584 wrote to memory of 1540	584	cmd.exe	56
PID 584 wrote to memory of 1540	584	cmd.exe	56
PID 584 wrote to memory of 1540	584	cmd.exe	56
PID 584 wrote to memory of 916	584	cmd.exe	57
PID 584 wrote to memory of 916	584	cmd.exe	57
PID 584 wrote to memory of 916	584	cmd.exe	57
PID 584 wrote to memory of 2392	584	cmd.exe	58
PID 584 wrote to memory of 2392	584	cmd.exe	58
PID 584 wrote to memory of 2392	584	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:2084
- 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:2948
- - 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:2716
  - - 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:2784
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\KCD9jDCWes.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:584
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:1540
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:916
      - C:\Users\Default User\WMIADAP.exe
        
        "C:\Users\Default User\WMIADAP.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:2392

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Mail\fr-FR\WMIADAP.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\fr-FR\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2292

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Mail\fr-FR\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:992

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2644

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1348

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\WMIADAP.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Users\Default User\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2416

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 8 /tr "'C:\Users\Default User\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1216

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\Application Data\WMIADAP.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1900

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Users\All Users\Application Data\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1656

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 13 /tr "'C:\Users\All Users\Application Data\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2876

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 9 /tr "'C:\Medal\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1192

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Medal\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 5 /tr "'C:\Medal\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2172

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 5 /tr "'C:\Medal\Medal.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1000

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:536

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 13 /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:632

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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KCD9jDCWes.bat

Path C:\Users\Admin\AppData\Local\Temp\KCD9jDCWes.bat
Size 209B
SHA256 7494fc393655d3552ecf42d5d31059e5ac9adc0e5e560d5de0d00df018102220
MD5 ac8d33f16d28a9ed9fb5b7e0746f2750
SHA1 d79d615b20b18162f9886c77a336d8505e336b04
SHA512 4c0fe2785017522508861ac546352e70a548342f78a91f9e87c0cf9351fdefed68f58a77778e3c62af42665f646ae7c5c7299f0205104a0edbfe2162f5688364
MD5 SHA1 SHA512

Submit Download

memory/2392-40-0x0000000000320000-0x00000000004FE000-memory.dmp

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memory/2784-13-0x00000000001A0000-0x000000000037E000-memory.dmp

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memory/2784-15-0x0000000000180000-0x000000000018E000-memory.dmp

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memory/2784-21-0x0000000000190000-0x000000000019E000-memory.dmp

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memory/2784-19-0x00000000005C0000-0x00000000005D8000-memory.dmp

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memory/2784-17-0x00000000003A0000-0x00000000003BC000-memory.dmp

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