darkcloud | 495ebfa4a23110b80b574a0dd8cf31022b207c50d2623ce9ac5156bc7660669e

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20251015-en
resource tags

arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
submitted
10/11/2025, 08:23

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General

Target
BBVA-PAGO.exe
Size 1.2MB
Sample251110-j98fssdn21
SHA256 495ebfa4a23110b80b574a0dd8cf31022b207c50d2623ce9ac5156bc7660669e
MD5 9ed0d8c88bffa379f5df36202d605cc4
SHA1 0819d433f5cab4de26c98ca3b0c3b087e7cb529a
SHA512 e0d045f6a9cc39be9aeae1cf61399f5384b351edd46eeb40746febf7dfca5e828f5cf879c373a8dc7747702d88db1fb9f206fbeae845c4f636a5c830d3042b19
SSDEEP 12288:avezD6ZtwCj87r4YSkIv8Xu0/9gZr4z8hsbG38hQY/pUjvz8+DY1GKQzSnMgwe+C:wqD64Cj8YD0e0y2i386YhUjYQgZQzJA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

crypter discovery darkcloud darktortilla loader persistence spyware stealer

Malware Config

Signatures

DarkCloud
An information stealer written in Visual Basic.
stealer darkcloud
Darkcloud family
darkcloud
Darktortilla
DarkTortilla is a highly configurable .NET based crypter that delivers a wide range of information stealers.
loader crypter darktortilla
Darktortilla family
darktortilla

Detects Darktortilla crypter. 1 IoCs

resource	yara_rule
behavioral2/memory/956-4-0x0000000005190000-0x00000000051D0000-memory.dmp	darktortilla

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral2/memory/956-4-0x0000000005190000-0x00000000051D0000-memory.dmp	net_reactor

Executes dropped EXE 2 IoCs

pid	Process
912	firebrats.exe
4992	firebrats.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1644934582-3155071241-5924616-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\boort = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\firebrats.exe"	BBVA-PAGO.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 956 set thread context of 4016	956	BBVA-PAGO.exe	81
PID 912 set thread context of 4992	912	firebrats.exe	84

System Location Discovery: System Language Discovery 1 TTPs 4 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	firebrats.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	firebrats.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BBVA-PAGO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BBVA-PAGO.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
956	BBVA-PAGO.exe
956	BBVA-PAGO.exe
956	BBVA-PAGO.exe
956	BBVA-PAGO.exe
956	BBVA-PAGO.exe
956	BBVA-PAGO.exe
912	firebrats.exe
912	firebrats.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	956	BBVA-PAGO.exe
Token: SeDebugPrivilege	912	firebrats.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4016	BBVA-PAGO.exe
4992	firebrats.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 956 wrote to memory of 2804	956	BBVA-PAGO.exe	79
PID 956 wrote to memory of 2804	956	BBVA-PAGO.exe	79
PID 956 wrote to memory of 2804	956	BBVA-PAGO.exe	79
PID 956 wrote to memory of 2804	956	BBVA-PAGO.exe	79
PID 956 wrote to memory of 2804	956	BBVA-PAGO.exe	79
PID 956 wrote to memory of 2804	956	BBVA-PAGO.exe	79
PID 956 wrote to memory of 2804	956	BBVA-PAGO.exe	79
PID 956 wrote to memory of 2804	956	BBVA-PAGO.exe	79
PID 956 wrote to memory of 1076	956	BBVA-PAGO.exe	80
PID 956 wrote to memory of 1076	956	BBVA-PAGO.exe	80
PID 956 wrote to memory of 1076	956	BBVA-PAGO.exe	80
PID 956 wrote to memory of 1076	956	BBVA-PAGO.exe	80
PID 956 wrote to memory of 1076	956	BBVA-PAGO.exe	80
PID 956 wrote to memory of 1076	956	BBVA-PAGO.exe	80
PID 956 wrote to memory of 1076	956	BBVA-PAGO.exe	80
PID 956 wrote to memory of 1076	956	BBVA-PAGO.exe	80
PID 956 wrote to memory of 4016	956	BBVA-PAGO.exe	81
PID 956 wrote to memory of 4016	956	BBVA-PAGO.exe	81
PID 956 wrote to memory of 4016	956	BBVA-PAGO.exe	81
PID 956 wrote to memory of 4016	956	BBVA-PAGO.exe	81
PID 956 wrote to memory of 4016	956	BBVA-PAGO.exe	81
PID 956 wrote to memory of 4016	956	BBVA-PAGO.exe	81
PID 956 wrote to memory of 4016	956	BBVA-PAGO.exe	81
PID 956 wrote to memory of 4016	956	BBVA-PAGO.exe	81
PID 912 wrote to memory of 4992	912	firebrats.exe	84
PID 912 wrote to memory of 4992	912	firebrats.exe	84
PID 912 wrote to memory of 4992	912	firebrats.exe	84
PID 912 wrote to memory of 4992	912	firebrats.exe	84
PID 912 wrote to memory of 4992	912	firebrats.exe	84
PID 912 wrote to memory of 4992	912	firebrats.exe	84
PID 912 wrote to memory of 4992	912	firebrats.exe	84
PID 912 wrote to memory of 4992	912	firebrats.exe	84

C:\Users\Admin\AppData\Local\Temp\BBVA-PAGO.exe
"C:\Users\Admin\AppData\Local\Temp\BBVA-PAGO.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:956
- C:\Users\Admin\AppData\Local\Temp\BBVA-PAGO.exe
  "C:\Users\Admin\AppData\Local\Temp\BBVA-PAGO.exe"
  2⤵
  PID:2804
- C:\Users\Admin\AppData\Local\Temp\BBVA-PAGO.exe
  "C:\Users\Admin\AppData\Local\Temp\BBVA-PAGO.exe"
  2⤵
  PID:1076
- C:\Users\Admin\AppData\Local\Temp\BBVA-PAGO.exe
  "C:\Users\Admin\AppData\Local\Temp\BBVA-PAGO.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4016

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\firebrats.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\firebrats.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:912
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\firebrats.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\firebrats.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4992

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

LoginData

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\CUJYPUWD-Admin\LoginData
Size 56KB
SHA256 ce41f2a3255df2099ae8eea9364bd28c6fd6a56c8ca3290bd274944d16d9e6bf
MD5 0e2c60740cafa19c5158f4aa41a5d4e7
SHA1 f01d0f359e407fed424c30919ed64b77508b3024
SHA512 e367b88f1d984f84b9b4a8fa4002ede1afad0d375f9374636250f17e64445a60d1b99fe23a0b314c4b2bd5fd27fe5b87fa4079a84b4497629f238afd8436afe2
SSDEEP 96:qUfXG38t8KLPeymORCGr25bn8MouB6w9f/rGSEPONy:qUu0RCGr2V7Iw9fFN
MD5 SHA1 SHA512 SSDEEP

Submit Download

WebData

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\CUJYPUWD-Admin\WebData
Size 228KB
SHA256 257947aba31142bab41ca56915c2ef843c2a156c527dee5d1a07e1224e380aed
MD5 8ce704458e632d243a023357eec3702f
SHA1 b4857c6a1e277776b8a08c243917eeae5470aa56
SHA512 a96d4aded8fd5ce2cfeeaba2bc69a399006bc723e1aa0777989648b2fe8caa7b6d421744c2bcd52b633d0e2d41b951df2cbc91ac64054c7b8cb63f887b496449
SSDEEP 192:DC3fT8aRJQnGqqrgenLfUK3NDivIz6DoNCPaWaVIdssXVydue2g2C0:e3fQuJQnPqrgWLfUK3hivmY4Cvp68C
MD5 SHA1 SHA512 SSDEEP

Submit Download

firebrats.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\firebrats.exe
Size 1.2MB
SHA256 495ebfa4a23110b80b574a0dd8cf31022b207c50d2623ce9ac5156bc7660669e
MD5 9ed0d8c88bffa379f5df36202d605cc4
SHA1 0819d433f5cab4de26c98ca3b0c3b087e7cb529a
SHA512 e0d045f6a9cc39be9aeae1cf61399f5384b351edd46eeb40746febf7dfca5e828f5cf879c373a8dc7747702d88db1fb9f206fbeae845c4f636a5c830d3042b19
SSDEEP 12288:avezD6ZtwCj87r4YSkIv8Xu0/9gZr4z8hsbG38hQY/pUjvz8+DY1GKQzSnMgwe+C:wqD64Cj8YD0e0y2i386YhUjYQgZQzJA
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/912-29-0x0000000005630000-0x0000000005640000-memory.dmp

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memory/912-28-0x0000000005630000-0x0000000005640000-memory.dmp

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memory/956-8-0x0000000006020000-0x0000000006036000-memory.dmp

Download

memory/956-4-0x0000000005190000-0x00000000051D0000-memory.dmp

Download

memory/956-7-0x0000000005460000-0x0000000005470000-memory.dmp

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memory/956-0-0x0000000000630000-0x000000000076C000-memory.dmp

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memory/956-9-0x0000000009AA0000-0x0000000009AA6000-memory.dmp

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memory/956-10-0x0000000005460000-0x0000000005470000-memory.dmp

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memory/956-11-0x0000000005460000-0x0000000005470000-memory.dmp

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memory/956-1-0x00000000058C0000-0x0000000005E66000-memory.dmp

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memory/956-2-0x0000000005220000-0x00000000052B2000-memory.dmp

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memory/956-5-0x0000000005460000-0x0000000005470000-memory.dmp

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memory/956-6-0x00000000053B0000-0x00000000053BA000-memory.dmp

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memory/956-3-0x0000000005310000-0x00000000053AC000-memory.dmp

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memory/4016-13-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/4016-12-0x0000000000400000-0x0000000000477000-memory.dmp

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