formbook | 8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1

Analysis

max time kernel
149s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20250610-en
resource tags

arch:x64arch:x86image:win10v2004-20250610-enlocale:en-usos:windows10-2004-x64system
submitted
09/10/2025, 17:08

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General

Target
8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe
Size 1.2MB
Sample251009-vn28fasks2
SHA256 8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1
MD5 d5dac1fd78204634bd9922bdd0ab486c
SHA1 d7a1ff3ac5f2c1fb46a3074b71838fb718c89101
SHA512 4879fdb3319b30f2bd989b3a387e628113ec9781c607916e33a151b6c3799cba81cf8a9c1f8a13fcd29729cb1f0a69b332158e1a8e7e5b889cf540cb97017d28
SSDEEP 24576:L5EmXFtKaL4/oFe5T9yyXYfP1ijXda7FsPRzOe48s:LPVt/LZeJbInQRa7FsPRzO
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
behavioral1/memory/340-16-0x0000000000400000-0x0000000000448000-memory.dmp	family_formbook

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/6000-12-0x00000000010B0000-0x00000000014B0000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 6000 set thread context of 340	6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe	85

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	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe
340	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe
6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe
6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 6000 wrote to memory of 340	6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe	85
PID 6000 wrote to memory of 340	6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe	85
PID 6000 wrote to memory of 340	6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe	85
PID 6000 wrote to memory of 340	6000	8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe	85

C:\Users\Admin\AppData\Local\Temp\8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe
"C:\Users\Admin\AppData\Local\Temp\8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.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:6000
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\8140b3643310b3758b1f74901780b3ea7bba90d99991d5a266f22151502065b1.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:340

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

aut880D.tmp

Path C:\Users\Admin\AppData\Local\Temp\aut880D.tmp
Size 286KB
SHA256 ebc30d1793655dbf3b6bb1664a73e7ea1d6856b43b7df482671073511900cf40
MD5 12630603ddef96c49b9bd515143a241a
SHA1 cc04b6c41b8883a9e17d573eac6bb4a293a3a73e
SHA512 73d985d6a6d63897a7334e3fee119dfd59d059805aa36b06106ac147677980a0c50c81f216e80fb90afd2ed4ecc4c09a792dde166918869c107cc4fea110b58c
SSDEEP 6144:U/ituKD6farA+3T2+cApxwTdp6GylqX2fJJcPkq+jcThK+Q27rHQ:U/IbGirAe4SGVmnc5+jlBqrHQ
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/340-13-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/340-14-0x0000000001A00000-0x0000000001D4A000-memory.dmp

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memory/340-15-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/340-16-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/6000-12-0x00000000010B0000-0x00000000014B0000-memory.dmp

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