formbook | e2c9efe051cf98faf07f7b8620cbe245018bcbf1779e4cf7cee46be69c8a7991

Resubmissions

03/11/2025, 16:32

251103-t1x9kstjam10

03/11/2025, 16:27

251103-tyf8aasrhp10

Analysis

max time kernel
149s
max time network
104s
platform
windows11-21h2_x64
resource
win11-20251015-en
resource tags

arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
submitted
03/11/2025, 16:27

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General

Target
FACTURA_RV-23882 Pvt Ltd.pdf.exe
Size 1.2MB
Sample251103-tyf8aasrhp
SHA256 e2c9efe051cf98faf07f7b8620cbe245018bcbf1779e4cf7cee46be69c8a7991
MD5 fd80c7c3fba30e5924fd26254ed4a1b8
SHA1 993682786e4bd8a63733027f6763d45302ac6923
SHA512 0eb4b350f1e4ad63eccdff920a86a741e30e6572b635629480bf1b7a18dad0f6ed00190aede10d82d73c01274938e57f432a5d9ff5c72c707194b86215c1f191
SSDEEP 24576:t5EmXFtKaL4/oFe5T9yyXYfP1ijXdaRak3NBDTjL2IomWOII6:tPVt/LZeJbInQRaRdPj2N/p
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 2 IoCs

rat

resource	yara_rule
behavioral2/memory/992-14-0x0000000000400000-0x0000000000449000-memory.dmp	family_formbook
behavioral2/memory/992-16-0x0000000000400000-0x0000000000449000-memory.dmp	family_formbook

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1484 set thread context of 992	1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe	78

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5440	1484	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	FACTURA_RV-23882 Pvt Ltd.pdf.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe
992	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe
1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe
1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1484 wrote to memory of 992	1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe	78
PID 1484 wrote to memory of 992	1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe	78
PID 1484 wrote to memory of 992	1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe	78
PID 1484 wrote to memory of 992	1484	FACTURA_RV-23882 Pvt Ltd.pdf.exe	78

C:\Users\Admin\AppData\Local\Temp\FACTURA_RV-23882 Pvt Ltd.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\FACTURA_RV-23882 Pvt Ltd.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\FACTURA_RV-23882 Pvt Ltd.pdf.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1484 -s 764
  2⤵
  - Program crash
  PID:5440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1484 -ip 1484
1⤵
PID:5736

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

Replay Monitor

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Downloads

aut5B50.tmp

Path C:\Users\Admin\AppData\Local\Temp\aut5B50.tmp
Size 289KB
SHA256 7a0817aba33aa068e183ca298d4d9bab36ef9a05882d51af826ae32040eea944
MD5 693efec8b7c641d64afd6a4c9482e991
SHA1 0f3e7c6dbeeefcc2e7c696e6942fa552684d017c
SHA512 3a05c79ccdf10293148c6935ed982694453f7d36df3f3b9f4fbffaee320557a309d20ddcb8467b160adc2b0907443b6b4ed2a406bf0655a7db6953a6aa1f5bec
SSDEEP 6144:SfRSxOtbZJ/PHME2++6NLbR16LSoGOUoHUdwDATo0S:y2OtbL/PHME2++6Zb/4SP4AwDATo9
MD5 SHA1 SHA512 SSDEEP

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memory/992-13-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/992-15-0x0000000001800000-0x0000000001B56000-memory.dmp

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memory/992-14-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/992-16-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/1484-12-0x00000000013E0000-0x00000000017E0000-memory.dmp

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