dcrat | e5d28ec84e4b5f023e3f386cf7e0776850b67e2bad1299413885f3fdd757f58c

Analysis

max time kernel
118s
max time network
123s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:18

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General

Target

e787228874f75520e2a95df7768ba99b.exe
Size

984KB
MD5

e787228874f75520e2a95df7768ba99b
SHA1

03c4f765750cf2f42f3421f80353376a665ab9a5
SHA256

4acafc42154659f6098bf63fa5671b7ab8b72d27785ad7737112ec2dbbc32bf4
SHA512

48ea43fe8cfd0a7f5f9609ec30546ab3e9a356d0bb03327e9edf2899daf1251059ba8397061e560090c1eb33f9887ae7c23756fed263266311701f1f36c33fcf
SSDEEP

12288:LzZvuvewk/0pPPXA5q/TQ9+n95vV25gnwHexSDwbwvDxlpaS98IUNldnd65EgF1s:LzZvuGD2PvA5YxwmbZB6Uv

Score

10^/10

dcrat infostealer persistence 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 4 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	2676	2656	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2832	2656	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2756	2656	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2584	2656	schtasks.exe	30

Executes dropped EXE 1 IoCs

pid	Process
1104	lsm.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Windows\\System32\\wbem\\msiprov\\WmiPrvSE.exe\""	e787228874f75520e2a95df7768ba99b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Windows\\System32\\MsPbdaCoInst\\taskhost.exe\""	e787228874f75520e2a95df7768ba99b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\sppcommdlg\\lsm.exe\""	e787228874f75520e2a95df7768ba99b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\Windows\\IME\\fr-FR\\System.exe\""	e787228874f75520e2a95df7768ba99b.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\wbem\msiprov\RCX3A27.tmp	e787228874f75520e2a95df7768ba99b.exe
File opened for modification	C:\Windows\System32\wbem\msiprov\WmiPrvSE.exe	e787228874f75520e2a95df7768ba99b.exe
File created	C:\Windows\System32\MsPbdaCoInst\b75386f1303e64	e787228874f75520e2a95df7768ba99b.exe
File opened for modification	C:\Windows\System32\MsPbdaCoInst\RCX341C.tmp	e787228874f75520e2a95df7768ba99b.exe
File opened for modification	C:\Windows\System32\sppcommdlg\RCX3620.tmp	e787228874f75520e2a95df7768ba99b.exe
File opened for modification	C:\Windows\System32\sppcommdlg\lsm.exe	e787228874f75520e2a95df7768ba99b.exe
File created	C:\Windows\System32\MsPbdaCoInst\taskhost.exe	e787228874f75520e2a95df7768ba99b.exe
File opened for modification	C:\Windows\System32\MsPbdaCoInst\taskhost.exe	e787228874f75520e2a95df7768ba99b.exe
File created	C:\Windows\System32\sppcommdlg\lsm.exe	e787228874f75520e2a95df7768ba99b.exe
File created	C:\Windows\System32\sppcommdlg\101b941d020240	e787228874f75520e2a95df7768ba99b.exe
File created	C:\Windows\System32\wbem\msiprov\WmiPrvSE.exe	e787228874f75520e2a95df7768ba99b.exe
File created	C:\Windows\System32\wbem\msiprov\24dbde2999530e	e787228874f75520e2a95df7768ba99b.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\IME\fr-FR\System.exe	e787228874f75520e2a95df7768ba99b.exe
File created	C:\Windows\IME\fr-FR\27d1bcfc3c54e0	e787228874f75520e2a95df7768ba99b.exe
File opened for modification	C:\Windows\IME\fr-FR\RCX3823.tmp	e787228874f75520e2a95df7768ba99b.exe
File opened for modification	C:\Windows\IME\fr-FR\System.exe	e787228874f75520e2a95df7768ba99b.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2676	schtasks.exe
2832	schtasks.exe
2756	schtasks.exe
2584	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3064	e787228874f75520e2a95df7768ba99b.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3064	e787228874f75520e2a95df7768ba99b.exe
Token: SeDebugPrivilege	1104	lsm.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 1104	3064	e787228874f75520e2a95df7768ba99b.exe	35
PID 3064 wrote to memory of 1104	3064	e787228874f75520e2a95df7768ba99b.exe	35
PID 3064 wrote to memory of 1104	3064	e787228874f75520e2a95df7768ba99b.exe	35

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\e787228874f75520e2a95df7768ba99b.exe
"C:\Users\Admin\AppData\Local\Temp\e787228874f75520e2a95df7768ba99b.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Windows\System32\sppcommdlg\lsm.exe
  "C:\Windows\System32\sppcommdlg\lsm.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\System32\MsPbdaCoInst\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2832

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\sppcommdlg\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Windows\IME\fr-FR\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2756

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\msiprov\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\System32\MsPbdaCoInst\taskhost.exe

Filesize
984KB

MD5
e787228874f75520e2a95df7768ba99b

SHA1
03c4f765750cf2f42f3421f80353376a665ab9a5

SHA256
4acafc42154659f6098bf63fa5671b7ab8b72d27785ad7737112ec2dbbc32bf4

SHA512
48ea43fe8cfd0a7f5f9609ec30546ab3e9a356d0bb03327e9edf2899daf1251059ba8397061e560090c1eb33f9887ae7c23756fed263266311701f1f36c33fcf

Download Submit
memory/1104-58-0x0000000000C00000-0x0000000000C12000-memory.dmp

Filesize
72KB

Download
memory/1104-56-0x0000000000D30000-0x0000000000E2C000-memory.dmp

Filesize
1008KB

Download
memory/3064-7-0x0000000000520000-0x0000000000530000-memory.dmp

Filesize
64KB

Download
memory/3064-4-0x00000000001C0000-0x00000000001D0000-memory.dmp

Filesize
64KB

Download
memory/3064-6-0x0000000000500000-0x0000000000508000-memory.dmp

Filesize
32KB

Download
memory/3064-0-0x000007FEF4EE3000-0x000007FEF4EE4000-memory.dmp

Filesize
4KB

Download
memory/3064-5-0x0000000000450000-0x0000000000460000-memory.dmp

Filesize
64KB

Download
memory/3064-8-0x0000000000510000-0x000000000051C000-memory.dmp

Filesize
48KB

Download
memory/3064-9-0x0000000000530000-0x0000000000542000-memory.dmp

Filesize
72KB

Download
memory/3064-10-0x0000000000570000-0x000000000057C000-memory.dmp

Filesize
48KB

Download
memory/3064-3-0x00000000004E0000-0x00000000004FC000-memory.dmp

Filesize
112KB

Download
memory/3064-2-0x000007FEF4EE0000-0x000007FEF58CC000-memory.dmp

Filesize
9.9MB

Download
memory/3064-57-0x000007FEF4EE0000-0x000007FEF58CC000-memory.dmp

Filesize
9.9MB

Download
memory/3064-1-0x0000000001030000-0x000000000112C000-memory.dmp

Filesize
1008KB

Download