dcrat | 4a3e0402f692a391300bb5dd374086e2ae642725918fce5a703d686899024559

Analysis

max time kernel
12s
max time network
13s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-12-2024 04:13

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General

Target

Winver.exe
Size

1.8MB
MD5

7e1cbd229ae163375fc55065690e27b4
SHA1

f1cecafde4f843b03f3defffcac7fd6950b582a6
SHA256

4a3e0402f692a391300bb5dd374086e2ae642725918fce5a703d686899024559
SHA512

545c246f2d0159f5c2f7631b891c19166505c525b0a6d66f2338460dfda94679da283aa3e8dffa7fc6fec5752cedbce753f731a7064cff8754970d8968d3c882
SSDEEP

24576:7Sgle/EPZ5XpxBeonQxcYHgC+aviVZZmQ5NnL+MIWRbtHU4aClCbs8HF7Kz9jxG:7AsZWHgReoP7nyWtHPaB37S9jx

Score

10^/10

dcrat infostealer rat

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	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4844	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	212	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2920	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4968	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1152	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1756	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5104	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4056	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	516	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4708	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3324	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3016	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4816	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3404	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1364	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	376	3612	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	344	3612	schtasks.exe	85

Checks computer location settings 2 TTPs 1 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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Winver.exe

Executes dropped EXE 1 IoCs

pid	Process
2504	backgroundTaskHost.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Multimedia Platform\5b884080fd4f94	Winver.exe
File created	C:\Program Files (x86)\Windows NT\backgroundTaskHost.exe	Winver.exe
File created	C:\Program Files (x86)\Windows NT\eddb19405b7ce1	Winver.exe
File created	C:\Program Files\Windows Multimedia Platform\fontdrvhost.exe	Winver.exe
File opened for modification	C:\Program Files\Windows Multimedia Platform\fontdrvhost.exe	Winver.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_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
4968	schtasks.exe
1756	schtasks.exe
3324	schtasks.exe
376	schtasks.exe
4708	schtasks.exe
3016	schtasks.exe
4816	schtasks.exe
4300	schtasks.exe
4844	schtasks.exe
212	schtasks.exe
1152	schtasks.exe
4056	schtasks.exe
516	schtasks.exe
344	schtasks.exe
2920	schtasks.exe
5104	schtasks.exe
3404	schtasks.exe
1364	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
4368	Winver.exe
2504	backgroundTaskHost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4368	Winver.exe
Token: SeDebugPrivilege	2504	backgroundTaskHost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4368 wrote to memory of 4460	4368	Winver.exe	104
PID 4368 wrote to memory of 4460	4368	Winver.exe	104
PID 4460 wrote to memory of 2016	4460	cmd.exe	106
PID 4460 wrote to memory of 2016	4460	cmd.exe	106
PID 4460 wrote to memory of 5064	4460	cmd.exe	108
PID 4460 wrote to memory of 5064	4460	cmd.exe	108
PID 4460 wrote to memory of 2504	4460	cmd.exe	110
PID 4460 wrote to memory of 2504	4460	cmd.exe	110

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\Winver.exe
"C:\Users\Admin\AppData\Local\Temp\Winver.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4368
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\w362lfqpe8.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4460
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2016
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:5064
- - C:\Program Files (x86)\Windows NT\backgroundTaskHost.exe
    "C:\Program Files (x86)\Windows NT\backgroundTaskHost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2504

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\Microsoft OneDrive\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:\Users\All Users\Microsoft OneDrive\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\Microsoft OneDrive\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows NT\backgroundTaskHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2920

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4968

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows NT\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1152

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Users\Public\Desktop\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1756

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\Public\Desktop\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 12 /tr "'C:\Users\Public\Desktop\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4056

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:516

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4708

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3324

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Multimedia Platform\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Windows Multimedia Platform\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Multimedia Platform\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WinverW" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\AppData\Local\Temp\Winver.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:344

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Winver" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\Winver.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1364

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WinverW" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\AppData\Local\Temp\Winver.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:376

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

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\Microsoft OneDrive\RuntimeBroker.exe

Filesize
1.8MB

MD5
7e1cbd229ae163375fc55065690e27b4

SHA1
f1cecafde4f843b03f3defffcac7fd6950b582a6

SHA256
4a3e0402f692a391300bb5dd374086e2ae642725918fce5a703d686899024559

SHA512
545c246f2d0159f5c2f7631b891c19166505c525b0a6d66f2338460dfda94679da283aa3e8dffa7fc6fec5752cedbce753f731a7064cff8754970d8968d3c882

Download Submit
C:\Users\Admin\AppData\Local\Temp\w362lfqpe8.bat

Filesize
232B

MD5
70e1cefb11f3f55595b5b98b1eb7d82c

SHA1
d7c0dfe709abc2aa1594c45233c0f342dd6e020e

SHA256
945e221a400b18223edc3a83e0309b75595bf92b0e4d1711d2c0fe224273797a

SHA512
33c07f78f57c586056aa8743da4c1d101fcd6a35bc518dc3a4af4a2a4d746cd3b7bbfdf91a4e2142585a2b35a7bc4be3d54cbb7f3191960bc1da09e61e17fc7c

Download Submit
memory/4368-4-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-14-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-0-0x00007FFEEB9B3000-0x00007FFEEB9B5000-memory.dmp

Filesize
8KB

Download
memory/4368-7-0x0000000002510000-0x000000000251E000-memory.dmp

Filesize
56KB

Download
memory/4368-5-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-8-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-10-0x000000001B0C0000-0x000000001B0DC000-memory.dmp

Filesize
112KB

Download
memory/4368-3-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-13-0x000000001B0E0000-0x000000001B0F8000-memory.dmp

Filesize
96KB

Download
memory/4368-11-0x000000001B250000-0x000000001B2A0000-memory.dmp

Filesize
320KB

Download
memory/4368-2-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-26-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-27-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-33-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/4368-1-0x00000000002B0000-0x0000000000482000-memory.dmp

Filesize
1.8MB

Download