dcrat | 2c41808826974a0fdd3c7b27850143cad077a79e0cf69c011da495d6abee679a

Resubmissions

24-11-2024 19:42

241124-yexs5s1rgq 10

24-11-2024 09:24

241124-lc6xtatmay 10

Analysis

max time kernel
153s
max time network
296s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
24-11-2024 19:42

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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 12 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	1848	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2216	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2476	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2452	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1320	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2160	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2576	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2792	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1632	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1608	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1384	2864	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	284	2864	schtasks.exe	32

Executes dropped EXE 2 IoCs

pid	Process
1792	Medal.exe
740	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
1304	cmd.exe
1304	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

description	ioc	Process
File created	C:\Program Files (x86)\MSBuild\dwm.exe	Medal.exe
File created	C:\Program Files (x86)\MSBuild\6cb0b6c459d5d3	Medal.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Panther\UnattendGC\Medal.exe	Medal.exe
File created	C:\Windows\Panther\UnattendGC\55c54f82b9f66a	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
2452	schtasks.exe
1608	schtasks.exe
2792	schtasks.exe
284	schtasks.exe
2608	schtasks.exe
2408	schtasks.exe
2528	schtasks.exe
3024	schtasks.exe
2216	schtasks.exe
1320	schtasks.exe
2412	schtasks.exe
2476	schtasks.exe
2160	schtasks.exe
2576	schtasks.exe
1632	schtasks.exe
2732	schtasks.exe
1848	schtasks.exe
1384	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe
1792	Medal.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
740	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1792	Medal.exe
Token: SeDebugPrivilege	740	csrss.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 2392	1820	F4620C0AFA8E21897509B2E7215097F5.exe	28
PID 1820 wrote to memory of 2392	1820	F4620C0AFA8E21897509B2E7215097F5.exe	28
PID 1820 wrote to memory of 2392	1820	F4620C0AFA8E21897509B2E7215097F5.exe	28
PID 1820 wrote to memory of 2392	1820	F4620C0AFA8E21897509B2E7215097F5.exe	28
PID 2392 wrote to memory of 1304	2392	WScript.exe	29
PID 2392 wrote to memory of 1304	2392	WScript.exe	29
PID 2392 wrote to memory of 1304	2392	WScript.exe	29
PID 2392 wrote to memory of 1304	2392	WScript.exe	29
PID 1304 wrote to memory of 1792	1304	cmd.exe	31
PID 1304 wrote to memory of 1792	1304	cmd.exe	31
PID 1304 wrote to memory of 1792	1304	cmd.exe	31
PID 1304 wrote to memory of 1792	1304	cmd.exe	31
PID 1792 wrote to memory of 2084	1792	Medal.exe	53
PID 1792 wrote to memory of 2084	1792	Medal.exe	53
PID 1792 wrote to memory of 2084	1792	Medal.exe	53
PID 2084 wrote to memory of 1812	2084	cmd.exe	55
PID 2084 wrote to memory of 1812	2084	cmd.exe	55
PID 2084 wrote to memory of 1812	2084	cmd.exe	55
PID 2084 wrote to memory of 1536	2084	cmd.exe	56
PID 2084 wrote to memory of 1536	2084	cmd.exe	56
PID 2084 wrote to memory of 1536	2084	cmd.exe	56
PID 2084 wrote to memory of 740	2084	cmd.exe	57
PID 2084 wrote to memory of 740	2084	cmd.exe	57
PID 2084 wrote to memory of 740	2084	cmd.exe	57

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:1820
- 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:2392
- - 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:1304
  - - C:\Medal\Medal.exe
      "C:\Medal/Medal.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1792
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\2orm62C6tI.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2084
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:1812
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:1536
      - C:\Medal\csrss.exe
        
        "C:\Medal\csrss.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\MSBuild\dwm.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:3024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\dwm.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2412

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\MSBuild\dwm.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2528

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Medal\csrss.exe'" /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2732

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Medal\csrss.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2408

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Medal\csrss.exe'" /rl HIGHEST /f
1⤵
- Scheduled Task/Job: Scheduled Task
PID:2608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 8 /tr "'C:\Windows\Panther\UnattendGC\Medal.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2216

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Medal" /sc ONLOGON /tr "'C:\Windows\Panther\UnattendGC\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 8 /tr "'C:\Windows\Panther\UnattendGC\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:284

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1384

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2452

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 10 /tr "'C:\Medal\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1320

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Medal\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 9 /tr "'C:\Medal\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1632

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:2792

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:2576

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 7 /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2160

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:\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\2orm62C6tI.bat

Filesize
194B

MD5
a236aeb91690d495ad9250b9cc777ad2

SHA1
e4ac635c19a9a440a6fd4d16d99c02e7aa86e81d

SHA256
e4cd0e2bb7cfad70c961ca173eaf1ca4183421bbc4ef3915b34e5126723c8eee

SHA512
e576da3f7ba24b3a7c364af7738b1cf051c724e4a6b60c93dcc9afe59e82f845c8a01dd78b0cce3aba5bd6bbfaf7070bd7019b18267b4891f9563206b9563635

Download Submit
memory/740-40-0x0000000000D30000-0x0000000000F0E000-memory.dmp

Filesize
1.9MB

Download
memory/1792-13-0x0000000000A80000-0x0000000000C5E000-memory.dmp

Filesize
1.9MB

Download
memory/1792-15-0x0000000000170000-0x000000000017E000-memory.dmp

Filesize
56KB

Download
memory/1792-21-0x00000000003A0000-0x00000000003AE000-memory.dmp

Filesize
56KB

Download
memory/1792-19-0x00000000003C0000-0x00000000003D8000-memory.dmp

Filesize
96KB

Download
memory/1792-17-0x0000000000380000-0x000000000039C000-memory.dmp

Filesize
112KB

Download