dcrat | f8eb9b286a0d33e287568961f883aa9d1be6e9ec8cf5eee3a3a1a6b106d02f74

Analysis

max time kernel
117s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:15

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General

Target

ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Size

984KB
MD5

ba6c7a8dc76a63c70a2e018c2bd2a059
SHA1

180970254354af46194e8ff74362230c6b667cd6
SHA256

89333332d2bf50e37c6df1a85b3d03d7f6bdd1b16fae842656dab89ba42252ec
SHA512

cfc904608b4af9b6be68c3750fb3b134e88c387c5521e4d4e9a4dd2a26cfc17774096d78e5c50bdffa7d0e12c941c850f72de46e639d441b511f193dc5d7ce6e
SSDEEP

12288:zzZvuvewk/0pPPXA5q/TQ9+n95vV25gnwHexSDwbwvDxlpaS98IUNldnd65EgF1s:zzZvuGD2PvA5YxwmbZB6Uv

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 7 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	484	2328	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2908	2328	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2864	2328	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2696	2328	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2188	2328	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2600	2328	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2616	2328	schtasks.exe	30

Executes dropped EXE 1 IoCs

pid	Process
2652	winlogon.exe

Adds Run key to start application 2 TTPs 7 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\winlogon = "\"C:\\Windows\\System32\\dispex\\winlogon.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\fr-FR\\lsm.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\ProgramData\\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\\updates\\dllhost.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Users\\All Users\\Start Menu\\explorer.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Windows\\System32\\wbem\\interop\\WmiPrvSE.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\services.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Recovery\\20e7eb62-69f6-11ef-be0c-62cb582c238c\\dwm.exe\""	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Drops file in System32 directory 8 IoCs

description	ioc	Process
File created	C:\Windows\System32\wbem\interop\WmiPrvSE.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\wbem\interop\24dbde2999530e	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\dispex\RCXC48A.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\dispex\winlogon.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\wbem\interop\RCXCD06.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\System32\wbem\interop\WmiPrvSE.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\dispex\winlogon.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\System32\dispex\cc11b995f2a76d	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\fr-FR\101b941d020240	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\fr-FR\RCXC68E.tmp	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File opened for modification	C:\Windows\fr-FR\lsm.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
File created	C:\Windows\fr-FR\lsm.exe	ba6c7a8dc76a63c70a2e018c2bd2a059.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 7 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
484	schtasks.exe
2908	schtasks.exe
2864	schtasks.exe
2696	schtasks.exe
2188	schtasks.exe
2600	schtasks.exe
2616	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
592	ba6c7a8dc76a63c70a2e018c2bd2a059.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	592	ba6c7a8dc76a63c70a2e018c2bd2a059.exe
Token: SeDebugPrivilege	2652	winlogon.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 592 wrote to memory of 2652	592	ba6c7a8dc76a63c70a2e018c2bd2a059.exe	39
PID 592 wrote to memory of 2652	592	ba6c7a8dc76a63c70a2e018c2bd2a059.exe	39
PID 592 wrote to memory of 2652	592	ba6c7a8dc76a63c70a2e018c2bd2a059.exe	39

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\ba6c7a8dc76a63c70a2e018c2bd2a059.exe
"C:\Users\Admin\AppData\Local\Temp\ba6c7a8dc76a63c70a2e018c2bd2a059.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:592
- C:\Windows\System32\dispex\winlogon.exe
  "C:\Windows\System32\dispex\winlogon.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2652

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0018-0409-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\dispex\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2908

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\fr-FR\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2696

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2600

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\All Users\Start Menu\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2188

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\interop\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2616

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:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\dllhost.exe

Filesize
984KB

MD5
ba6c7a8dc76a63c70a2e018c2bd2a059

SHA1
180970254354af46194e8ff74362230c6b667cd6

SHA256
89333332d2bf50e37c6df1a85b3d03d7f6bdd1b16fae842656dab89ba42252ec

SHA512
cfc904608b4af9b6be68c3750fb3b134e88c387c5521e4d4e9a4dd2a26cfc17774096d78e5c50bdffa7d0e12c941c850f72de46e639d441b511f193dc5d7ce6e

Download Submit
memory/592-4-0x0000000000140000-0x0000000000150000-memory.dmp

Filesize
64KB

Download
memory/592-9-0x00000000005E0000-0x00000000005F2000-memory.dmp

Filesize
72KB

Download
memory/592-6-0x0000000000430000-0x0000000000438000-memory.dmp

Filesize
32KB

Download
memory/592-7-0x0000000000440000-0x0000000000450000-memory.dmp

Filesize
64KB

Download
memory/592-5-0x0000000000420000-0x0000000000430000-memory.dmp

Filesize
64KB

Download
memory/592-0-0x000007FEF59D3000-0x000007FEF59D4000-memory.dmp

Filesize
4KB

Download
memory/592-3-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/592-2-0x000007FEF59D0000-0x000007FEF63BC000-memory.dmp

Filesize
9.9MB

Download
memory/592-10-0x0000000000610000-0x000000000061C000-memory.dmp

Filesize
48KB

Download
memory/592-8-0x00000000005D0000-0x00000000005DC000-memory.dmp

Filesize
48KB

Download
memory/592-1-0x0000000000C20000-0x0000000000D1C000-memory.dmp

Filesize
1008KB

Download
memory/592-82-0x000007FEF59D0000-0x000007FEF63BC000-memory.dmp

Filesize
9.9MB

Download
memory/2652-81-0x0000000000CD0000-0x0000000000DCC000-memory.dmp

Filesize
1008KB

Download
memory/2652-83-0x0000000000B90000-0x0000000000BA2000-memory.dmp

Filesize
72KB

Download