formbook | 9fc9401b548091b02b74da0ea58aa279db23c47c5ab2bfaacea4605df89d511d

Analysis

max time kernel
149s
max time network
93s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
02/02/2026, 01:05

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General

Target
Inquiry ES75502262.exe
Size 1.2MB
Sample260202-bfsjgsay8a
SHA256 9fc9401b548091b02b74da0ea58aa279db23c47c5ab2bfaacea4605df89d511d
MD5 4a8427b6aad7c78e64e38790a6642a25
SHA1 d941cd91e420278150b4b65e122f535576291325
SHA512 08a1fb1353873765f1c159bc1079064150347087001580c271a14e85dfff2aff61d3a95d96ad48f7121b16d8a44a10f618b84cf264623f734d46f704ec6d1c54
SSDEEP 24576:15EmXFtKaL4/oFe5T9yyXYfP1ijXdahsDRcaa3PqVaM+rwJqtRaa:1PVt/LZeJbInQRahsO7CVgrwJqtR
TLSH
T16645CF027381D062FFAB92734F5AF6115BBC79260123A62F13981D79BE701B1563E7A3
MD5 SHA1 SHA512 SSDEEP TLSH

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/5372-11-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2720 set thread context of 5372	2720	Inquiry ES75502262.exe	80

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5496	2720	WerFault.exe	79

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	Inquiry ES75502262.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe
5372	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2720	Inquiry ES75502262.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
2720	Inquiry ES75502262.exe
2720	Inquiry ES75502262.exe
2720	Inquiry ES75502262.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
2720	Inquiry ES75502262.exe
2720	Inquiry ES75502262.exe
2720	Inquiry ES75502262.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 2720 wrote to memory of 5372	2720	Inquiry ES75502262.exe	80

C:\Users\Admin\AppData\Local\Temp\Inquiry ES75502262.exe
"C:\Users\Admin\AppData\Local\Temp\Inquiry ES75502262.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:2720
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\Inquiry ES75502262.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:5372
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2720 -s 756
  2⤵
  - Program crash
  PID:5496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2720 -ip 2720
1⤵
PID:5400

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

aut5A60.tmp

Path C:\Users\Admin\AppData\Local\Temp\aut5A60.tmp
Size 278KB
SHA256 81b029b7ce7851ced0ab62b183766980b1e4d899aeec99235e20498641465f7e
MD5 41b6831f196e387979eb26ac56d21bc7
SHA1 9a6e94aeef26a1616c1dbe1f3001d105ce27cdaf
SHA512 880dd0eaa13a597a9e1e7815304c1fa6aebfb810685cb9050337a96b072cd7fa12ecec6a67c153addcb76c27b196a488e962728c3fbe99b6b76a14aad839fd0c
SSDEEP 6144:aUsceDPGsGiRnVCEaFyowGcTBx0mLqbXSMVe5y2bD4ov:aU3ebGjirXZTtLqbpVeVD4e
TLSH
T169540284496CE2D851CA8AE1A74379314931C9B0FFEF1FBB86E5E7840737120277899B
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2720-6-0x00000000012A0000-0x00000000012A4000-memory.dmp

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memory/5372-7-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/5372-8-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/5372-9-0x0000000001D00000-0x0000000002056000-memory.dmp

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memory/5372-10-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/5372-11-0x0000000000400000-0x0000000000446000-memory.dmp

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