formbook | 79c131e66bd132cec01935296fce8326c5fda972d830b8d53555548ad9dce6ff

Analysis

max time kernel
149s
max time network
138s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-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
behavioral1/memory/5396-16-0x0000000001210000-0x0000000001256000-memory.dmp	family_formbook
behavioral1/memory/5396-20-0x0000000001210000-0x0000000001256000-memory.dmp	family_formbook
behavioral1/memory/5396-26-0x0000000001210000-0x0000000001256000-memory.dmp	family_formbook
behavioral1/memory/5324-28-0x0000000000740000-0x0000000000783000-memory.dmp	family_formbook
behavioral1/memory/5324-32-0x0000000000740000-0x0000000000783000-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
12	3040	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
5648	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2684263265-1628758615-802431902-1000\Control Panel\International\Geo\Nation	wscript.exe

ConfuserEx .NET packer 3 IoCs

Detects ConfuserEx .NET packer.

resource	yara_rule
behavioral1/memory/5648-12-0x000001D15F570000-0x000001D15F584000-memory.dmp	ConfuserEx
behavioral1/memory/5648-14-0x000001D15F5B0000-0x000001D15F5C4000-memory.dmp	ConfuserEx
behavioral1/memory/5648-34-0x000001D143FC0000-0x000001D143FD4000-memory.dmp	ConfuserEx

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 5648 set thread context of 5396	5648	powershell.exe	93
PID 5396 set thread context of 3040	5396	aspnet_compiler.exe	84
PID 5396 set thread context of 5324	5396	aspnet_compiler.exe	94
PID 5648 set thread context of 552	5648	powershell.exe	96
PID 5324 set thread context of 3040	5324	sethc.exe	84
PID 5648 set thread context of 2288	5648	powershell.exe	97
PID 5648 set thread context of 5284	5648	powershell.exe	99
PID 5648 set thread context of 5612	5648	powershell.exe	102
PID 5648 set thread context of 2072	5648	powershell.exe	103
PID 5648 set thread context of 3616	5648	powershell.exe	105
PID 5648 set thread context of 6096	5648	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
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
5996	taskkill.exe

Suspicious behavior: EnumeratesProcesses 45 IoCs

pid	Process
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5396	aspnet_compiler.exe
5396	aspnet_compiler.exe
5396	aspnet_compiler.exe
5396	aspnet_compiler.exe
5648	powershell.exe
5324	sethc.exe
5324	sethc.exe
5324	sethc.exe
5324	sethc.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
552	aspnet_compiler.exe
5648	powershell.exe
2288	aspnet_compiler.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
5284	aspnet_compiler.exe
5648	powershell.exe
5612	aspnet_compiler.exe
5648	powershell.exe
2072	aspnet_compiler.exe
5648	powershell.exe
5648	powershell.exe
5648	powershell.exe
3616	aspnet_compiler.exe
5648	powershell.exe
6096	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
5396	aspnet_compiler.exe
3040	wscript.exe
3040	wscript.exe
5324	sethc.exe
5324	sethc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5648	powershell.exe
Token: SeDebugPrivilege	5996	taskkill.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 5648	3040	wscript.exe	85
PID 5648 wrote to memory of 3144	5648	powershell.exe	87
PID 5648 wrote to memory of 1656	5648	powershell.exe	88
PID 5648 wrote to memory of 5668	5648	powershell.exe	89
PID 5648 wrote to memory of 904	5648	powershell.exe	90
PID 5648 wrote to memory of 3872	5648	powershell.exe	91
PID 5648 wrote to memory of 4144	5648	powershell.exe	92
PID 5648 wrote to memory of 5396	5648	powershell.exe	93
PID 5648 wrote to memory of 5396	5648	powershell.exe	93
PID 5648 wrote to memory of 5396	5648	powershell.exe	93
PID 3040 wrote to memory of 5324	3040	wscript.exe	94
PID 5648 wrote to memory of 4728	5648	powershell.exe	95
PID 5648 wrote to memory of 552	5648	powershell.exe	96
PID 5648 wrote to memory of 552	5648	powershell.exe	96
PID 5648 wrote to memory of 552	5648	powershell.exe	96
PID 5648 wrote to memory of 2288	5648	powershell.exe	97
PID 5648 wrote to memory of 2288	5648	powershell.exe	97
PID 5648 wrote to memory of 2288	5648	powershell.exe	97
PID 5648 wrote to memory of 1552	5648	powershell.exe	98
PID 5648 wrote to memory of 5284	5648	powershell.exe	99
PID 5648 wrote to memory of 5284	5648	powershell.exe	99
PID 5648 wrote to memory of 5284	5648	powershell.exe	99
PID 5648 wrote to memory of 5612	5648	powershell.exe	102
PID 5648 wrote to memory of 5612	5648	powershell.exe	102
PID 5648 wrote to memory of 5612	5648	powershell.exe	102
PID 5648 wrote to memory of 2072	5648	powershell.exe	103
PID 5648 wrote to memory of 2072	5648	powershell.exe	103
PID 5648 wrote to memory of 2072	5648	powershell.exe	103
PID 5648 wrote to memory of 5600	5648	powershell.exe	104
PID 5648 wrote to memory of 3616	5648	powershell.exe	105
PID 5648 wrote to memory of 3616	5648	powershell.exe	105
PID 5648 wrote to memory of 3616	5648	powershell.exe	105
PID 5648 wrote to memory of 6096	5648	powershell.exe	106
PID 5648 wrote to memory of 6096	5648	powershell.exe	106
PID 5648 wrote to memory of 6096	5648	powershell.exe	106
PID 3040 wrote to memory of 5996	3040	wscript.exe	107

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmp0v4eycxf.js
1⤵
- Badlisted process makes network request
- Checks computer location settings
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File "C:\Temp\ps_gqxfVadUEPUT_1779492143257.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5648
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3144
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1656
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:5668
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:904
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3872
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4144
- - 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:5396
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4728
- - 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:552
- - 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:2288
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1552
- - 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:5284
- - 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:5612
- - 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:2072
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:5600
- - 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:3616
- - 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:6096
- 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:5324
- C:\Windows\System32\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im wscript.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:5996

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

Query Registry

T1012

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_gqxfVadUEPUT_1779492143257.ps1

Path C:\Temp\ps_gqxfVadUEPUT_1779492143257.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_n5tajic3.gke.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n5tajic3.gke.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/3040-39-0x0000020FE8D10000-0x0000020FE8E0A000-memory.dmp

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memory/3040-30-0x0000020FE8D10000-0x0000020FE8E0A000-memory.dmp

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memory/5324-23-0x0000000000740000-0x0000000000783000-memory.dmp

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memory/5324-32-0x0000000000740000-0x0000000000783000-memory.dmp

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memory/5324-28-0x0000000000740000-0x0000000000783000-memory.dmp

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memory/5324-24-0x0000000000740000-0x0000000000783000-memory.dmp

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memory/5396-25-0x0000000001210000-0x0000000001256000-memory.dmp

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memory/5396-16-0x0000000001210000-0x0000000001256000-memory.dmp

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memory/5396-26-0x0000000001210000-0x0000000001256000-memory.dmp

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memory/5396-27-0x0000000005890000-0x00000000058B4000-memory.dmp

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memory/5396-19-0x00000000018D0000-0x0000000001C1C000-memory.dmp

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memory/5396-20-0x0000000001210000-0x0000000001256000-memory.dmp

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memory/5396-22-0x0000000005890000-0x00000000058B4000-memory.dmp

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memory/5396-21-0x0000000001210000-0x0000000001256000-memory.dmp

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memory/5396-15-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/5648-14-0x000001D15F5B0000-0x000001D15F5C4000-memory.dmp

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memory/5648-1-0x000001D15C470000-0x000001D15C480000-memory.dmp

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memory/5648-18-0x000001D15C470000-0x000001D15C480000-memory.dmp

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memory/5648-17-0x000001D15C470000-0x000001D15C480000-memory.dmp

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memory/5648-13-0x000001D15F580000-0x000001D15F586000-memory.dmp

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memory/5648-12-0x000001D15F570000-0x000001D15F584000-memory.dmp

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memory/5648-10-0x000001D15C470000-0x000001D15C480000-memory.dmp

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memory/5648-34-0x000001D143FC0000-0x000001D143FD4000-memory.dmp

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memory/5648-4-0x000001D15E8A0000-0x000001D15E8C2000-memory.dmp

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