formbook | d43766bcc8d45cb537503718527c20600d81f7881b356ad485976f47ead91062

Analysis

max time kernel
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260617-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
22/06/2026, 15:37

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General

Target
_d43766bcc8d45cb537503718527c20600d81f7881b356ad485976f47ead91062.js
Size 1.9MB
Sample260622-s2mnsses41
SHA256 d43766bcc8d45cb537503718527c20600d81f7881b356ad485976f47ead91062
MD5 bf580bbe97936c38eb762ae9453b0915
SHA1 5e3190cd1fb05d0cf6029c9238d8bedd8fb8b746
SHA512 a3ad1986347452be2e48a2c5c8ffe763466b65a6b62dc4d42ab7b7477650355ded541c041093c2b99888246440fe59de85f53fa42442ee2c66036a755f0405f2
SSDEEP 24576:2KHTwl3S+EIglNBTXipTKolIqDH9mJpS+Ht+zFJ2lgItPT08OBh7j57pxR:JHSC+Q8LO+6lI5L9
TLSH
T1329502019AC46FF4CFAC5B2990FE160DE3A14A8A5516658AFB23FD06EFF750052071B9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution formbook persistence rat spyware stealer trojan

Malware Config

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/2860-38-0x0000000000A20000-0x0000000000A67000-memory.dmp	family_formbook
behavioral2/memory/1308-44-0x00000000010B0000-0x00000000010F4000-memory.dmp	family_formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1320	powershell.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemUpdate_rJSNKWh6wCJt_1782142644908.lnk	wscript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SystemUpdate_rJSNKWh6wCJt_1782142644908 = "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File \"C:\\Temp\\ps_rJSNKWh6wCJt_1782142644908.ps1\""	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3226024100-3888324339-2736661264-1000\Software\Microsoft\Windows\CurrentVersion\Run\SystemUpdate_rJSNKWh6wCJt_1782142644908 = "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File \"C:\\Temp\\ps_rJSNKWh6wCJt_1782142644908.ps1\""	wscript.exe

Suspicious use of SetThreadContext 9 IoCs

description	pid	Process	procid_target
PID 1320 set thread context of 2860	1320	powershell.exe	98
PID 2860 set thread context of 4824	2860	aspnet_compiler.exe	87
PID 2860 set thread context of 1308	2860	aspnet_compiler.exe	100
PID 1320 set thread context of 888	1320	powershell.exe	101
PID 1308 set thread context of 5660	1308	icsunattend.exe
PID 1320 set thread context of 2008	1320	powershell.exe	102
PID 1320 set thread context of 5800	1320	powershell.exe	103
PID 1320 set thread context of 2728	1320	powershell.exe	105
PID 1320 set thread context of 4408	1320	powershell.exe	106

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	icsunattend.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{A8CDFF1C-4878-43be-B5FD-F8091C1C60D0}\Instance\	wscript.exe

Suspicious behavior: EnumeratesProcesses 39 IoCs

pid	Process
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
4912	powershell.exe
4912	powershell.exe
4912	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
2860	aspnet_compiler.exe
2860	aspnet_compiler.exe
2860	aspnet_compiler.exe
2860	aspnet_compiler.exe
1320	powershell.exe
1308	icsunattend.exe
1308	icsunattend.exe
1308	icsunattend.exe
1308	icsunattend.exe
1320	powershell.exe
888	aspnet_compiler.exe
1320	powershell.exe
2008	aspnet_compiler.exe
1320	powershell.exe
5800	aspnet_compiler.exe
1320	powershell.exe
1320	powershell.exe
1320	powershell.exe
2728	aspnet_compiler.exe
1320	powershell.exe
4408	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2860	aspnet_compiler.exe
4824	wscript.exe
4824	wscript.exe
1308	icsunattend.exe
1308	icsunattend.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1320	powershell.exe
Token: SeDebugPrivilege	4912	powershell.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4824 wrote to memory of 1320	4824	wscript.exe	88
PID 1320 wrote to memory of 1800	1320	powershell.exe	93
PID 1320 wrote to memory of 1440	1320	powershell.exe	94
PID 1320 wrote to memory of 948	1320	powershell.exe	95
PID 1320 wrote to memory of 3476	1320	powershell.exe	96
PID 1320 wrote to memory of 3416	1320	powershell.exe	97
PID 1320 wrote to memory of 2860	1320	powershell.exe	98
PID 1320 wrote to memory of 2860	1320	powershell.exe	98
PID 1320 wrote to memory of 2860	1320	powershell.exe	98
PID 4824 wrote to memory of 1308	4824	wscript.exe	100
PID 1320 wrote to memory of 888	1320	powershell.exe	101
PID 1320 wrote to memory of 888	1320	powershell.exe	101
PID 1320 wrote to memory of 888	1320	powershell.exe	101
PID 1320 wrote to memory of 2008	1320	powershell.exe	102
PID 1320 wrote to memory of 2008	1320	powershell.exe	102
PID 1320 wrote to memory of 2008	1320	powershell.exe	102
PID 1320 wrote to memory of 5800	1320	powershell.exe	103
PID 1320 wrote to memory of 5800	1320	powershell.exe	103
PID 1320 wrote to memory of 5800	1320	powershell.exe	103
PID 1320 wrote to memory of 2284	1320	powershell.exe	104
PID 1320 wrote to memory of 2728	1320	powershell.exe	105
PID 1320 wrote to memory of 2728	1320	powershell.exe	105
PID 1320 wrote to memory of 2728	1320	powershell.exe	105
PID 1320 wrote to memory of 4408	1320	powershell.exe	106
PID 1320 wrote to memory of 4408	1320	powershell.exe	106
PID 1320 wrote to memory of 4408	1320	powershell.exe	106

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\_d43766bcc8d45cb537503718527c20600d81f7881b356ad485976f47ead91062.js
1⤵
- Drops startup file
- Adds Run key to start application
- Modifies registry class
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4824
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -NonInteractive -NoLogo -File "C:\Temp\ps_rJSNKWh6wCJt_1782142644908.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1320
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1800
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1440
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:948
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3476
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3416
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    PID:2860
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:888
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2008
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:5800
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2284
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2728
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4408
- C:\Windows\SysWOW64\srdelayed.exe
  "C:\Windows\SysWOW64\srdelayed.exe"
  2⤵
  PID:4576
- C:\Windows\SysWOW64\icsunattend.exe
  "C:\Windows\SysWOW64\icsunattend.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:1308

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4912

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

PowerShell

T1059.001

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

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

ps_rJSNKWh6wCJt_1782142644908.ps1

Path C:\Temp\ps_rJSNKWh6wCJt_1782142644908.ps1
Size 1.4MB
SHA256 8b1e7103a97c687a053688a6ffa5d95df1d8bbb26a9820694159702cfb00f47e
MD5 a2567cd8ea54002221bff5c07c8b0d9d
SHA1 a711f21eec03767ef7131d8dd3f5c63371f3daac
SHA512 c75002b7cc0cabf6ff079d50c2f7e40a6b6d39eaddeda58df68d32d94bbda08e3a70b5d6875f59373f519ede929d9d8104c5a2fb4f1c97a88b29379996b2dac9
SSDEEP 24576:cXdaBLt/202iV1ZXsQGiC3YtgSlt3POdM5UfmVON7KUuPl:PH0rQp4YmajSN7TUl
TLSH
T108653328164EAFAD4268A7385ABF6E5E43621F66905CB5E7874074CB014F488DECFF1C
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ModuleAnalysisCache

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
Size 67KB
SHA256 f2d08d203b14c7b04c51457c288935997a9b6b4798749b26d2ed76f793c9be01
MD5 54c53233026ab406044ca984f7332dea
SHA1 2de7cbe7779615c5b90ab5ed7564ecd81a1a026c
SHA512 c24116c0a6776343a1ca7cd485d6679a0af74e7f48f75762dac9ff2652dc08c7306d2e12a479867e2383a8f77e51589ef2fd5d525f9c15d1c8fe85f1a0aed49a
SSDEEP 1536:zKLg5GYo2hOovpfKQVCYXflJdreY8iFHzwqR40i71Yi9MQyPiMrxKi3jiRjdvRwG:zKLg5GYo2hOovpfKQVCYXflJdiYhFHzG
TLSH
T1E0636292E9204E75E1A66F3EF15622627C30394690F8113211DC25EFA987D970B1FBFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1308-44-0x00000000010B0000-0x00000000010F4000-memory.dmp

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memory/1308-42-0x00000000010B0000-0x00000000010F4000-memory.dmp

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memory/1320-33-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-36-0x000001D647710000-0x000001D647718000-memory.dmp

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memory/1320-10-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-8-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-12-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-13-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-15-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-16-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-14-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-17-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-18-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-51-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-3-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-43-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-4-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-7-0x000001D647650000-0x000001D647672000-memory.dmp

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memory/1320-35-0x000001D647690000-0x000001D64769C000-memory.dmp

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memory/1320-9-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/1320-2-0x00007FFA05A7F000-0x00007FFA05A80000-memory.dmp

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memory/2860-37-0x0000000000400000-0x0000000000447000-memory.dmp

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memory/2860-38-0x0000000000A20000-0x0000000000A67000-memory.dmp

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memory/4912-28-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-31-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-29-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-34-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-27-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-26-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-32-0x000002067A160000-0x000002067A1A8000-memory.dmp

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memory/4912-30-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-25-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-24-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-23-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-22-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-45-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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memory/4912-21-0x00007FFA058F0000-0x00007FFA06294000-memory.dmp

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