formbook | 79c131e66bd132cec01935296fce8326c5fda972d830b8d53555548ad9dce6ff

Analysis

max time kernel
149s
max time network
130s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
22/05/2026, 23:22

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General

Target
tmp0v4eycxf.js
Size 3.0MB
Sample260522-3cn6faax2t
SHA256 79c131e66bd132cec01935296fce8326c5fda972d830b8d53555548ad9dce6ff
MD5 abf5f8237b0fcb989cfd5d4f372b2e58
SHA1 5d862fecd1d71ac96d025c287ad8a69474949987
SHA512 c9107860dfb7198f9423bc0e0e49e54f73e4106ebdcca032ddc3c058aba62ecf0ed2ec04afff96e6d49151ea7159070cc041c7972cae4e43816b3c7ed775013d
SSDEEP 49152:YTd4SulqG11YKzqmi85B2FHgRXD9DpmrNmBhSGUw7xNEoRxx2Nht8RvVbT7j:r
TLSH
T1ADE55C17D66F5B4D180A3B61106A5D9AFE89CAFCEF726BC4E0CF90B210EE1110B855B7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution formbook persistence privilege_escalation 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 5 IoCs

rat

resource	yara_rule
behavioral3/memory/5560-15-0x0000000000DB0000-0x0000000000DF6000-memory.dmp	family_formbook
behavioral3/memory/5560-19-0x0000000000DB0000-0x0000000000DF6000-memory.dmp	family_formbook
behavioral3/memory/5560-28-0x0000000000DB0000-0x0000000000DF6000-memory.dmp	family_formbook
behavioral3/memory/2556-30-0x0000000001000000-0x0000000001043000-memory.dmp	family_formbook
behavioral3/memory/2556-35-0x0000000001000000-0x0000000001043000-memory.dmp	family_formbook

Badlisted process makes network request 1 IoCs

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

flow	pid	Process
2	2168	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4784	powershell.exe

ConfuserEx .NET packer 3 IoCs

Detects ConfuserEx .NET packer.

resource	yara_rule
behavioral3/memory/4784-11-0x00000275D75F0000-0x00000275D7604000-memory.dmp	ConfuserEx
behavioral3/memory/4784-13-0x00000275EFA80000-0x00000275EFA94000-memory.dmp	ConfuserEx
behavioral3/memory/4784-31-0x00000275F29C0000-0x00000275F29D4000-memory.dmp	ConfuserEx

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 4784 set thread context of 5560	4784	powershell.exe	86
PID 5560 set thread context of 2168	5560	aspnet_compiler.exe	78
PID 5560 set thread context of 2556	5560	aspnet_compiler.exe	87
PID 4784 set thread context of 6136	4784	powershell.exe	89
PID 2556 set thread context of 2168	2556	sethc.exe	78
PID 4784 set thread context of 3372	4784	powershell.exe	90
PID 4784 set thread context of 5400	4784	powershell.exe	91
PID 4784 set thread context of 1560	4784	powershell.exe	92
PID 4784 set thread context of 836	4784	powershell.exe	93
PID 4784 set thread context of 1992	4784	powershell.exe	94
PID 4784 set thread context of 3944	4784	powershell.exe	95

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
Event Triggered Execution: Accessibility Features 1 TTPs
Windows contains accessibility features that may be used by adversaries to establish persistence and/or elevate privileges.
persistence privilege_escalation

Accessibility Features
T1546.008

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	sethc.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
1104	taskkill.exe

Suspicious behavior: EnumeratesProcesses 39 IoCs

pid	Process
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
5560	aspnet_compiler.exe
5560	aspnet_compiler.exe
5560	aspnet_compiler.exe
5560	aspnet_compiler.exe
4784	powershell.exe
2556	sethc.exe
2556	sethc.exe
2556	sethc.exe
2556	sethc.exe
4784	powershell.exe
4784	powershell.exe
4784	powershell.exe
6136	aspnet_compiler.exe
4784	powershell.exe
3372	aspnet_compiler.exe
4784	powershell.exe
5400	aspnet_compiler.exe
4784	powershell.exe
1560	aspnet_compiler.exe
4784	powershell.exe
836	aspnet_compiler.exe
4784	powershell.exe
1992	aspnet_compiler.exe
4784	powershell.exe
3944	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
5560	aspnet_compiler.exe
2168	wscript.exe
2168	wscript.exe
2556	sethc.exe
2556	sethc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4784	powershell.exe
Token: SeDebugPrivilege	1104	taskkill.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 4784	2168	wscript.exe	79
PID 4784 wrote to memory of 2524	4784	powershell.exe	81
PID 4784 wrote to memory of 1852	4784	powershell.exe	82
PID 4784 wrote to memory of 4936	4784	powershell.exe	83
PID 4784 wrote to memory of 1056	4784	powershell.exe	84
PID 4784 wrote to memory of 4480	4784	powershell.exe	85
PID 4784 wrote to memory of 5560	4784	powershell.exe	86
PID 4784 wrote to memory of 5560	4784	powershell.exe	86
PID 4784 wrote to memory of 5560	4784	powershell.exe	86
PID 2168 wrote to memory of 2556	2168	wscript.exe	87
PID 4784 wrote to memory of 1804	4784	powershell.exe	88
PID 4784 wrote to memory of 6136	4784	powershell.exe	89
PID 4784 wrote to memory of 6136	4784	powershell.exe	89
PID 4784 wrote to memory of 6136	4784	powershell.exe	89
PID 4784 wrote to memory of 3372	4784	powershell.exe	90
PID 4784 wrote to memory of 3372	4784	powershell.exe	90
PID 4784 wrote to memory of 3372	4784	powershell.exe	90
PID 4784 wrote to memory of 5400	4784	powershell.exe	91
PID 4784 wrote to memory of 5400	4784	powershell.exe	91
PID 4784 wrote to memory of 5400	4784	powershell.exe	91
PID 4784 wrote to memory of 1560	4784	powershell.exe	92
PID 4784 wrote to memory of 1560	4784	powershell.exe	92
PID 4784 wrote to memory of 1560	4784	powershell.exe	92
PID 4784 wrote to memory of 836	4784	powershell.exe	93
PID 4784 wrote to memory of 836	4784	powershell.exe	93
PID 4784 wrote to memory of 836	4784	powershell.exe	93
PID 4784 wrote to memory of 1992	4784	powershell.exe	94
PID 4784 wrote to memory of 1992	4784	powershell.exe	94
PID 4784 wrote to memory of 1992	4784	powershell.exe	94
PID 4784 wrote to memory of 3944	4784	powershell.exe	95
PID 4784 wrote to memory of 3944	4784	powershell.exe	95
PID 4784 wrote to memory of 3944	4784	powershell.exe	95
PID 2168 wrote to memory of 1104	2168	wscript.exe	97

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmp0v4eycxf.js
1⤵
- Badlisted process makes network request
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File "C:\Temp\ps_H1bPgXmDhR48_1779492144083.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4784
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2524
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1852
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4936
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1056
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4480
- - 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:5560
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1804
- - 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:6136
- - 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:3372
- - 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:5400
- - 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:1560
- - 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:836
- - 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:1992
- - 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:3944
- C:\Windows\SysWOW64\sethc.exe
  "C:\Windows\SysWOW64\sethc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:2556
- C:\Windows\System32\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im wscript.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:1104

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

PowerShell

T1059.001

Persistence

Event Triggered Execution

T1546

Accessibility Features

T1546.008

Privilege Escalation

Event Triggered Execution

T1546

Accessibility Features

T1546.008

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

ps_H1bPgXmDhR48_1779492144083.ps1

Path C:\Temp\ps_H1bPgXmDhR48_1779492144083.ps1
Size 2.2MB
SHA256 4c33280e380d3a6f82b382ad915632993a2b9447b9ac02ef16b749e1fd700566
MD5 221d965a4b813540fe64363e5f804a4b
SHA1 61ceaa8767baaac404de35058d5bc58d8db556b9
SHA512 73cee6cc9a91dc2ad154530b0448a4927d2ca6cabb9d705898cdf106693442b21ef1f92c327f4055b7a84417c521401dece156ab4bad7971db3694aee9aba59a
SSDEEP 24576:l6yNX0tpRDNnUQ8hf6eHCKdA2Tki34uq2hxPzhnsx:0
TLSH
T1CDA5BFCAD56E44D29C053FC9A8142BC78B2546728A7400283A7F7D898F774FEC15EEE6
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_hr2gk2h1.ctt.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hr2gk2h1.ctt.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/2168-23-0x0000000000360000-0x00000000012F7000-memory.dmp

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memory/2168-33-0x0000000000360000-0x00000000012F7000-memory.dmp

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memory/2168-34-0x0000020210030000-0x00000202100EF000-memory.dmp

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memory/2168-42-0x0000020210030000-0x00000202100EF000-memory.dmp

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memory/2556-30-0x0000000001000000-0x0000000001043000-memory.dmp

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memory/2556-25-0x0000000001000000-0x0000000001043000-memory.dmp

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memory/2556-24-0x0000000001000000-0x0000000001043000-memory.dmp

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memory/2556-35-0x0000000001000000-0x0000000001043000-memory.dmp

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memory/4784-17-0x00000275EFA90000-0x00000275EFAA0000-memory.dmp

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memory/4784-16-0x00000275EFA90000-0x00000275EFAA0000-memory.dmp

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memory/4784-13-0x00000275EFA80000-0x00000275EFA94000-memory.dmp

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memory/4784-12-0x00000275EFA70000-0x00000275EFA76000-memory.dmp

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memory/4784-1-0x00000275EFA90000-0x00000275EFAA0000-memory.dmp

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memory/4784-31-0x00000275F29C0000-0x00000275F29D4000-memory.dmp

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memory/4784-20-0x00000275EFA90000-0x00000275EFAA0000-memory.dmp

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memory/4784-11-0x00000275D75F0000-0x00000275D7604000-memory.dmp

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memory/4784-9-0x00000275D75B0000-0x00000275D75D2000-memory.dmp

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memory/4784-2-0x00000275EFA90000-0x00000275EFAA0000-memory.dmp

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memory/5560-22-0x00000000011E0000-0x0000000001204000-memory.dmp

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memory/5560-29-0x00000000011E0000-0x0000000001204000-memory.dmp

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memory/5560-28-0x0000000000DB0000-0x0000000000DF6000-memory.dmp

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memory/5560-26-0x0000000000DB0000-0x0000000000DF6000-memory.dmp

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memory/5560-21-0x0000000000DB0000-0x0000000000DF6000-memory.dmp

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memory/5560-19-0x0000000000DB0000-0x0000000000DF6000-memory.dmp

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memory/5560-18-0x0000000001360000-0x00000000016B6000-memory.dmp

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memory/5560-15-0x0000000000DB0000-0x0000000000DF6000-memory.dmp

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memory/5560-14-0x0000000000400000-0x0000000000446000-memory.dmp

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