dcrat | 7e71c79883eb025596762b4e0bf86b447039079dfe510ccf13a383b612575fa6

Analysis

max time kernel
102s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:09

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

3e435c9ff25f6dca4a3e7262825aa557.exe
Size

984KB
MD5

3e435c9ff25f6dca4a3e7262825aa557
SHA1

57cb6e337e1c91c2937544fdfa78d3704d2ff408
SHA256

db97ef403b3433d2cae1fc98d893d14e67b83a14e7d8e4e428152fde8d83d934
SHA512

00c0863dc6728e01cddb5c605d1210c0d1c2b7bf7b4e2426f61bb2b6eb4addb102c7ef5d46db693557b3e8dcf4d68a33ddcfe499713666afd05d986b5be9ebe8
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 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	3668	5304	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5032	5304	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4580	5304	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4536	5304	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4644	5304	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4688	5304	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4704	5304	schtasks.exe	87

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-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	3e435c9ff25f6dca4a3e7262825aa557.exe

Executes dropped EXE 1 IoCs

pid	Process
5812	OfficeClickToRun.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\sihost = "\"C:\\Windows\\Media\\Cityscape\\sihost.exe\""	3e435c9ff25f6dca4a3e7262825aa557.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Idle = "\"C:\\Recovery\\WindowsRE\\Idle.exe\""	3e435c9ff25f6dca4a3e7262825aa557.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\upfc = "\"C:\\Documents and Settings\\upfc.exe\""	3e435c9ff25f6dca4a3e7262825aa557.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\vccorlib120\\dllhost.exe\""	3e435c9ff25f6dca4a3e7262825aa557.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sihost = "\"C:\\Documents and Settings\\sihost.exe\""	3e435c9ff25f6dca4a3e7262825aa557.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\Windows\\System32\\FilterDS\\SppExtComObj.exe\""	3e435c9ff25f6dca4a3e7262825aa557.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OfficeClickToRun = "\"C:\\Program Files\\Common Files\\microsoft shared\\ClickToRun\\C2RINTL.es-es\\OfficeClickToRun.exe\""	3e435c9ff25f6dca4a3e7262825aa557.exe

Drops file in System32 directory 8 IoCs

description	ioc	Process
File created	C:\Windows\System32\vccorlib120\5940a34987c991	3e435c9ff25f6dca4a3e7262825aa557.exe
File created	C:\Windows\System32\FilterDS\SppExtComObj.exe	3e435c9ff25f6dca4a3e7262825aa557.exe
File created	C:\Windows\System32\FilterDS\e1ef82546f0b02	3e435c9ff25f6dca4a3e7262825aa557.exe
File opened for modification	C:\Windows\System32\vccorlib120\RCX53BF.tmp	3e435c9ff25f6dca4a3e7262825aa557.exe
File opened for modification	C:\Windows\System32\vccorlib120\dllhost.exe	3e435c9ff25f6dca4a3e7262825aa557.exe
File opened for modification	C:\Windows\System32\FilterDS\RCX5836.tmp	3e435c9ff25f6dca4a3e7262825aa557.exe
File opened for modification	C:\Windows\System32\FilterDS\SppExtComObj.exe	3e435c9ff25f6dca4a3e7262825aa557.exe
File created	C:\Windows\System32\vccorlib120\dllhost.exe	3e435c9ff25f6dca4a3e7262825aa557.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es\OfficeClickToRun.exe	3e435c9ff25f6dca4a3e7262825aa557.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es\e6c9b481da804f	3e435c9ff25f6dca4a3e7262825aa557.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es\RCX5AA8.tmp	3e435c9ff25f6dca4a3e7262825aa557.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es\OfficeClickToRun.exe	3e435c9ff25f6dca4a3e7262825aa557.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Media\Cityscape\RCX5CAD.tmp	3e435c9ff25f6dca4a3e7262825aa557.exe
File opened for modification	C:\Windows\Media\Cityscape\sihost.exe	3e435c9ff25f6dca4a3e7262825aa557.exe
File created	C:\Windows\Media\Cityscape\sihost.exe	3e435c9ff25f6dca4a3e7262825aa557.exe
File created	C:\Windows\Media\Cityscape\66fc9ff0ee96c2	3e435c9ff25f6dca4a3e7262825aa557.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\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	3e435c9ff25f6dca4a3e7262825aa557.exe

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
4536	schtasks.exe
4644	schtasks.exe
4688	schtasks.exe
4704	schtasks.exe
3668	schtasks.exe
5032	schtasks.exe
4580	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5460	3e435c9ff25f6dca4a3e7262825aa557.exe
5460	3e435c9ff25f6dca4a3e7262825aa557.exe
5460	3e435c9ff25f6dca4a3e7262825aa557.exe
5460	3e435c9ff25f6dca4a3e7262825aa557.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5460	3e435c9ff25f6dca4a3e7262825aa557.exe
Token: SeDebugPrivilege	5812	OfficeClickToRun.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5460 wrote to memory of 5812	5460	3e435c9ff25f6dca4a3e7262825aa557.exe	95
PID 5460 wrote to memory of 5812	5460	3e435c9ff25f6dca4a3e7262825aa557.exe	95

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\3e435c9ff25f6dca4a3e7262825aa557.exe
"C:\Users\Admin\AppData\Local\Temp\3e435c9ff25f6dca4a3e7262825aa557.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5460
- C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es\OfficeClickToRun.exe
  "C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es\OfficeClickToRun.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:5812

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Documents and Settings\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3668

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\vccorlib120\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Documents and Settings\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\System32\FilterDS\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4536

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4644

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\Media\Cityscape\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4704

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

Loading Replay Monitor...

Downloads

C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es\OfficeClickToRun.exe

Filesize
984KB

MD5
3e435c9ff25f6dca4a3e7262825aa557

SHA1
57cb6e337e1c91c2937544fdfa78d3704d2ff408

SHA256
db97ef403b3433d2cae1fc98d893d14e67b83a14e7d8e4e428152fde8d83d934

SHA512
00c0863dc6728e01cddb5c605d1210c0d1c2b7bf7b4e2426f61bb2b6eb4addb102c7ef5d46db693557b3e8dcf4d68a33ddcfe499713666afd05d986b5be9ebe8

Download Submit
memory/5460-6-0x00000000009E0000-0x00000000009F0000-memory.dmp

Filesize
64KB

Download
memory/5460-7-0x0000000000A60000-0x0000000000A68000-memory.dmp

Filesize
32KB

Download
memory/5460-3-0x0000000000A40000-0x0000000000A5C000-memory.dmp

Filesize
112KB

Download
memory/5460-4-0x0000000002490000-0x00000000024E0000-memory.dmp

Filesize
320KB

Download
memory/5460-5-0x0000000000880000-0x0000000000890000-memory.dmp

Filesize
64KB

Download
memory/5460-0-0x00007FFE080A3000-0x00007FFE080A5000-memory.dmp

Filesize
8KB

Download
memory/5460-8-0x0000000000A70000-0x0000000000A80000-memory.dmp

Filesize
64KB

Download
memory/5460-2-0x00007FFE080A0000-0x00007FFE08B61000-memory.dmp

Filesize
10.8MB

Download
memory/5460-9-0x0000000002440000-0x000000000244C000-memory.dmp

Filesize
48KB

Download
memory/5460-10-0x0000000002450000-0x0000000002462000-memory.dmp

Filesize
72KB

Download
memory/5460-11-0x000000001BE30000-0x000000001C358000-memory.dmp

Filesize
5.2MB

Download
memory/5460-12-0x0000000002480000-0x000000000248C000-memory.dmp

Filesize
48KB

Download
memory/5460-1-0x00000000001E0000-0x00000000002DC000-memory.dmp

Filesize
1008KB

Download
memory/5460-136-0x00007FFE080A0000-0x00007FFE08B61000-memory.dmp

Filesize
10.8MB

Download