formbook | 522872381482e48bead08cb983ce213ba8e5fdfd19e7f4df2a571fc03352efae

Analysis

max time kernel
149s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
17/08/2026, 03:05

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General

Target
output_vb4q4ky2.vbs
Size 282KB
Sample260817-dk835ssclf
SHA256 522872381482e48bead08cb983ce213ba8e5fdfd19e7f4df2a571fc03352efae
MD5 ebd2b9f126210cb4b5b797e8b4e71d5a
SHA1 42e591e66f182bda6e69ef83d2d5c2da7eb25f11
SHA512 cdbebd73aee26c227d5653ef7a14f5ed0052f4b958963fd8a8f06920e1363b3af88132018cd4d8d58351ec3a38aaea1f420df13ebb0c106155f34b36ac2e3b01
SSDEEP 6144:/ophIl4uusFWVhncAwpUuWhePViQEctwpIDo1dfGCrhu0IaSp:/oduETwXt8cRDon7ra/
TLSH
T186543A3DB0BDD771ECA002685662CA81053AD5C420E863603FFB689DF3BD5A9769235F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

adware collection 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/2344-31-0x0000000000B40000-0x0000000000B87000-memory.dmp	family_formbook
behavioral2/memory/1664-33-0x0000000000F10000-0x0000000000F54000-memory.dmp	family_formbook

Badlisted process makes network request 2 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
7	1648	powershell.exe
9	1648	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1648	powershell.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
9	1648	powershell.exe

Accesses Microsoft Outlook profiles 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key enumerated	\REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	chkdsk.exe

Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs

execution

Visual Basic

T1059.005

pid	Process
1300	WScript.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 1648 set thread context of 2344	1648	powershell.exe	93
PID 2344 set thread context of 1300	2344	svchost.exe	87
PID 2344 set thread context of 1664	2344	svchost.exe	94
PID 1664 set thread context of 5476	1664	chkdsk.exe	80
PID 1664 set thread context of 5320	1664	chkdsk.exe	96

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	chkdsk.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1738198120-2966725515-3980530802-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
1648	powershell.exe
1648	powershell.exe
2344	svchost.exe
2344	svchost.exe
2344	svchost.exe
2344	svchost.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5476	explorer.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
2344	svchost.exe
1300	WScript.exe
1300	WScript.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe
1664	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 29 IoCs

description	pid	Process
Token: SeDebugPrivilege	1648	powershell.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe
Token: SeShutdownPrivilege	5476	explorer.exe
Token: SeCreatePagefilePrivilege	5476	explorer.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1300 wrote to memory of 1648	1300	WScript.exe	91
PID 1648 wrote to memory of 2344	1648	powershell.exe	93
PID 1648 wrote to memory of 2344	1648	powershell.exe	93
PID 1648 wrote to memory of 2344	1648	powershell.exe	93
PID 1648 wrote to memory of 2344	1648	powershell.exe	93
PID 1300 wrote to memory of 1664	1300	WScript.exe	94
PID 1664 wrote to memory of 5320	1664	chkdsk.exe	96

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

outlook_office_path 1 IoCs

description	ioc	Process
Key enumerated	\REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	chkdsk.exe

C:\Windows\explorer.exe
explorer.exe /LOADSAVEDWINDOWS
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:5476
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\output_vb4q4ky2.vbs"
  2⤵
  - Executes a VBScript file via the Windows Script Host.
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1300
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -EP Bypass -NonInteractive -WindowStyle Hidden -File "C:\Users\Admin\AppData\Local\Temp\8C8CB49E\8C8CB49E.ps1"
    3⤵
    - Badlisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Downloads MZ/PE file
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1648
  - - C:\Windows\SysWow64\svchost.exe
      C:\Windows\SysWow64\svchost.exe
      4⤵
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      PID:2344
- - C:\Windows\SysWOW64\chkdsk.exe
    "C:\Windows\SysWOW64\chkdsk.exe"
    3⤵
    - Accesses Microsoft Outlook profiles
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Enumerates system info in registry
    - Modifies Internet Explorer settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    PID:1664
  - - C:\Program Files\Mozilla Firefox\Firefox.exe
      "C:\Program Files\Mozilla Firefox\Firefox.exe"
      4⤵
      PID:5320

C:\Windows\system32\wscript.exe
wscript.exe
1⤵
PID:2716

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Visual Basic

T1059.005

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

8C8CB49E.ps1

Path C:\Users\Admin\AppData\Local\Temp\8C8CB49E\8C8CB49E.ps1
Size 1KB
SHA256 046d69358ffd96bcc5330adf5c5f1a7888ab61886d563490255a00113f3b2092
MD5 e3148c83857df2ea7c996c8358f02f01
SHA1 5072d3d8481042d982ba512d75de60f3ac9c4b5a
SHA512 6da875ea7db6107f0f34bfa53c54e145339e479ac9a49aff1f40a416fefafd7dc7bcc8639b13e65208e16f4025f0d6f72f30dd40ed662925018b655746064d22
TLSH
T17C3110709ECE963A04C080938AB697D996B42D0CB65BBB25B7DAC98C010B5D6E6E1346
MD5 SHA1 SHA512 TLSH

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8C8CB49Ea

Path C:\Users\Admin\AppData\Local\Temp\8C8CB49E\8C8CB49Ea
Size 64KB
SHA256 4af46cda92a49e2ee849ba7e9c1601f91dbe6ed9c665122b23d4967ab137110e
MD5 91d1f59ca6c47ed93de048daa74b2fb7
SHA1 fd7fb294cee88811b5b568931a276387b8b14df0
SHA512 729cedb641ea6ff36643ccf3ac5983cc6ca04bc07ad7fd0a48d44fb7805b52e3ad106b2e475c2aef987ca1fcf26de8f5741b08eb706c28be4864fa35c4e14fb7
SSDEEP 1536:yjsi12jko28wBx1XKsnKQgIlGeenMy0NKq:yAi13WOYsKp3een0Nf
TLSH
T1055302C139371E337B580C78CD56E62790FD94E8F85E5A9E85F892978D9670AC80B8E0
MD5 SHA1 SHA512 SSDEEP TLSH

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8C8CB49Eb

Path C:\Users\Admin\AppData\Local\Temp\8C8CB49E\8C8CB49Eb
Size 64KB
SHA256 229fcc283910f537bbaf8ff61688025c9eaca60b2b550b924324d470ce7a746b
MD5 3962e21f9f471a196fead038fd5e05dd
SHA1 0528386f3c1075b3de057ecc591e2914e659a5a9
SHA512 53b09460dc7ec8d4d5474aa3a606d6822cd558d4de25b92973c9a5bd626fc82e879704d46d926ec2b4b3d97c226b377854e671930a96052902972bded271a370
SSDEEP 1536:BueapIPA8xTGMtRDGU6KCE1Gbjjb2cHKAiI1SvBJCPdoqCIH1rwXIU6E:BuLqAWGRUCE1mjyYKAdaUPNCIHy4xE
TLSH
T1A15302E52F5C216E3CFE4B04F2AD0C462A6675B4661D7DC2D232DF91207CFA1956AA20
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1648-20-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-22-0x0000014C7DA20000-0x0000014C7DA32000-memory.dmp

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memory/1648-9-0x0000014C7DAF0000-0x0000014C7DB12000-memory.dmp

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memory/1648-11-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-12-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-6-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-16-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-5-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-4-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-18-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-17-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-3-0x00007FFEB989F000-0x00007FFEB98A0000-memory.dmp

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memory/1648-19-0x0000014C7DB80000-0x0000014C7DBCE000-memory.dmp

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memory/1648-10-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-23-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-24-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-21-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1648-30-0x00007FFEB9710000-0x00007FFEBA0B4000-memory.dmp

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memory/1664-32-0x0000000000F10000-0x0000000000F54000-memory.dmp

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memory/1664-33-0x0000000000F10000-0x0000000000F54000-memory.dmp

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memory/2344-26-0x00000000005F0000-0x00000000005F1000-memory.dmp

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memory/2344-25-0x0000000000590000-0x00000000005D7000-memory.dmp

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memory/2344-31-0x0000000000B40000-0x0000000000B87000-memory.dmp

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memory/5320-41-0x000001824FF90000-0x0000018250088000-memory.dmp

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memory/5476-34-0x0000000005A20000-0x0000000005AEC000-memory.dmp

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