formbook | 9b6137a8a2aab203501a3131ae0aea965acf9afde14a739a5dbb5f5e7b08bfe1

Analysis

max time kernel
149s
max time network
106s
platform
windows11-21h2_x64
resource
win11-20250610-en
resource tags

arch:x64arch:x86image:win11-20250610-enlocale:en-usos:windows11-21h2-x64system
submitted
15/10/2025, 15:47

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General

Target
comprovativo-2 FT NORFIVE N5.exe
Size 1.2MB
Sample251015-s8h9ysbs8d
SHA256 9b6137a8a2aab203501a3131ae0aea965acf9afde14a739a5dbb5f5e7b08bfe1
MD5 4c8f5598deac94b8215d1e5dcfd5f3d1
SHA1 632366a1fb052534fa38b65cb2b667e3848ba302
SHA512 9314076d3be7ed9ccfb744c67ae1c828bb32f2e06384ffef9f3ce9a2b475559c13a31ac7045372698cd29df04463aff24ed99a3ff16f702cae1255d4710cca27
SSDEEP 24576:A5EmXFtKaL4/oFe5T9yyXYfP1ijXdalra7GCku449skqW:APVt/LZeJbInQRaleKwSk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

discovery formbook rat spyware stealer trojan

Malware Config

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Formbook family
formbook

Formbook payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/1808-16-0x0000000000400000-0x0000000000448000-memory.dmp	family_formbook

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5552 set thread context of 1808	5552	comprovativo-2 FT NORFIVE N5.exe	78

Program crash 1 IoCs

pid	pid_target	Process	procid_target
8	5552	WerFault.exe	77

System Location Discovery: System Language Discovery 1 TTPs 1 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	comprovativo-2 FT NORFIVE N5.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe
1808	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5552	comprovativo-2 FT NORFIVE N5.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5552 wrote to memory of 1808	5552	comprovativo-2 FT NORFIVE N5.exe	78
PID 5552 wrote to memory of 1808	5552	comprovativo-2 FT NORFIVE N5.exe	78
PID 5552 wrote to memory of 1808	5552	comprovativo-2 FT NORFIVE N5.exe	78
PID 5552 wrote to memory of 1808	5552	comprovativo-2 FT NORFIVE N5.exe	78

C:\Users\Admin\AppData\Local\Temp\comprovativo-2 FT NORFIVE N5.exe
"C:\Users\Admin\AppData\Local\Temp\comprovativo-2 FT NORFIVE N5.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5552
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\comprovativo-2 FT NORFIVE N5.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5552 -s 680
  2⤵
  - Program crash
  PID:8

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 5552 -ip 5552
1⤵
PID:5180

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

autB2D6.tmp

Path C:\Users\Admin\AppData\Local\Temp\autB2D6.tmp
Size 287KB
SHA256 0e55d189026e844019aac27500c1902ac798d46ff66215e79e032abce39d7b78
MD5 fa608802530bfdb0fb71b9ce66654392
SHA1 77ba48a76afa78a4435cea28c2af89b513112baa
SHA512 c5810b889d02abde2b335a78a969a163fe6b4ff05736d0088887feb303ca8ca02726551489141bdc430b7e68fb239ca09a56d3db21c3c1ca84a2f65d5b86e72b
SSDEEP 6144:0BVfKSf48b4gPzN5Aat4AnR4rgjrWQjQScyIGBi:0PKi4q4gbgJAnBazyICi
MD5 SHA1 SHA512 SSDEEP

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memory/1808-13-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/1808-14-0x0000000001A00000-0x0000000001D56000-memory.dmp

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memory/1808-15-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/1808-16-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/5552-12-0x00000000016C0000-0x0000000001AC0000-memory.dmp

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