formbook | 2be58949c983e0a12ce6c6891984322ef39a005b3735bf9350d19e41ea1e53fd

Analysis

user interaction
yes
max time kernel
12s
max time network
7s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
06/05/2026, 16:46

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General

Target
RFQ_305041_04302026_Danfei_de_México.js
Size 2.0MB
Sample260506-vaej8aew8z
SHA256 2be58949c983e0a12ce6c6891984322ef39a005b3735bf9350d19e41ea1e53fd
MD5 bcdace7e1de7a50d783f4067b21161e4
SHA1 5151bf3f09efdf8241d6e27a4d8e418f9f191d9e
SHA512 1450a35515e438775579ea492f4198d7cc7254dbe10ad3b56321498d644119d072a5de0f7e0b6c8adf95a7d9ecda7c42d371b5064ef9afc00356529858b7f77d
SSDEEP 24:37E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7E7EC:0Eoe05Qpb1G73YW3V4Y7kXNJLH0sARch
TLSH
T120A5B2C90D6FCBE8607180BFD42955682BC36CA722BD91D47A0E07E207B55DB137DAB8
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution formbook 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 1 IoCs

rat

resource	yara_rule
behavioral2/memory/5012-13-0x0000000001500000-0x0000000001546000-memory.dmp	family_formbook

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4948	2140	powershell.exe	80

Badlisted process makes network request 2 IoCs

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

flow	pid	Process
2	4948	powershell.exe
3	4948	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4948	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4948 set thread context of 5012	4948	powershell.exe	83

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4948	powershell.exe
4948	powershell.exe
5012	Caspol.exe
5012	Caspol.exe
5012	Caspol.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4948	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 5012	4948	powershell.exe	83
PID 4948 wrote to memory of 5012	4948	powershell.exe	83
PID 4948 wrote to memory of 5012	4948	powershell.exe	83

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\RFQ_305041_04302026_Danfei_de_México.js
1⤵
PID:4772

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -Command "IEX $env:INTERNAL_DB_CACHE;[Environment]::SetEnvironmentVariable('INTERNAL_DB_CACHE',$null,'User')"
1⤵
- Process spawned unexpected child process
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:5012

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_hdmdtipr.gye.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hdmdtipr.gye.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/4772-0-0x00000290C6FC0000-0x00000290C715A000-memory.dmp

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memory/4948-11-0x000001DCCDDF0000-0x000001DCCDEFC000-memory.dmp

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memory/4948-1-0x000001DCB53E0000-0x000001DCB53F0000-memory.dmp

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memory/4948-8-0x000001DCCDA00000-0x000001DCCDA22000-memory.dmp

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memory/4948-10-0x000001DCB53E0000-0x000001DCB53F0000-memory.dmp

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memory/4948-2-0x000001DCB53E0000-0x000001DCB53F0000-memory.dmp

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memory/4948-17-0x000001DCB5290000-0x000001DCB52A2000-memory.dmp

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memory/4948-16-0x000001DCB38C0000-0x000001DCB38F1000-memory.dmp

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memory/5012-12-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/5012-13-0x0000000001500000-0x0000000001546000-memory.dmp

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memory/5012-18-0x0000000001A20000-0x0000000001D76000-memory.dmp

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memory/5012-19-0x0000000001500000-0x0000000001546000-memory.dmp

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