formbook | bc3ac9ee4158d4ab67adcf4dc4c4134ad68335438b7e5afdcddbb24c2e832a91

Analysis

max time kernel
149s
max time network
144s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
submitted
02/06/2026, 12:31

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General

Target
tmpsao01l4t.js
Size 1.9MB
Sample260602-pp85gsds91
SHA256 bc3ac9ee4158d4ab67adcf4dc4c4134ad68335438b7e5afdcddbb24c2e832a91
MD5 4c4173b7bffdb12e2ec642f3637caefb
SHA1 888cf62358e924b162f3b77c61750f7e13777a72
SHA512 ce0ab9b5a949174c6a5cc322800300b6044c8cbe3ba3b7d8bdbb2edf2b6a2f02d4eef6e4369299678ccb85841014ca4cae05320bb17f98fabf2b5224df2d0adc
SSDEEP 24576:SB8O6sVnvGdMk2mIHMI5BFBPTG4QWCv4jJI68V6MSbtQPGaNv2gFiu/mOk:SBP62GioITG9z0xYKQlw7
TLSH
T19495021189C42FB4CFAC561980FD260E93F04A9A541AB98DFB73BE4BFFA7604520719D
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

adware collection defense_evasion discovery 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 4 IoCs

rat

resource	yara_rule
behavioral1/memory/3820-17-0x0000000000E90000-0x0000000000ED6000-memory.dmp	family_formbook
behavioral1/memory/3820-21-0x0000000000E90000-0x0000000000ED6000-memory.dmp	family_formbook
behavioral1/memory/3820-25-0x0000000000E90000-0x0000000000ED6000-memory.dmp	family_formbook
behavioral1/memory/1744-26-0x0000000000A60000-0x0000000000AA3000-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
20	2832	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4280	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

Accesses Microsoft Outlook profiles 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key enumerated	\REGISTRY\USER\S-1-5-21-2684263265-1628758615-802431902-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	newdev.exe

ConfuserEx .NET packer 1 IoCs

Detects ConfuserEx .NET packer.

resource	yara_rule
behavioral1/memory/4280-13-0x000002A25B480000-0x000002A25B490000-memory.dmp	ConfuserEx

Suspicious use of SetThreadContext 14 IoCs

description	pid	Process	procid_target
PID 4280 set thread context of 3820	4280	powershell.exe	94
PID 3820 set thread context of 2832	3820	aspnet_compiler.exe	86
PID 3820 set thread context of 1744	3820	aspnet_compiler.exe	95
PID 4280 set thread context of 832	4280	powershell.exe	100
PID 1744 set thread context of 2832	1744	newdev.exe	86
PID 4280 set thread context of 636	4280	powershell.exe	103
PID 4280 set thread context of 4668	4280	powershell.exe	106
PID 4280 set thread context of 3900	4280	powershell.exe	109
PID 1744 set thread context of 2980	1744	newdev.exe	108
PID 4280 set thread context of 4364	4280	powershell.exe	113
PID 4280 set thread context of 3544	4280	powershell.exe	114
PID 4280 set thread context of 2720	4280	powershell.exe	116
PID 1744 set thread context of 5736	1744	newdev.exe	115
PID 1744 set thread context of 2308	1744	newdev.exe	120

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

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	newdev.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
5508	taskkill.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2684263265-1628758615-802431902-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	newdev.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
3820	aspnet_compiler.exe
3820	aspnet_compiler.exe
3820	aspnet_compiler.exe
3820	aspnet_compiler.exe
4280	powershell.exe
1744	newdev.exe
1744	newdev.exe
1744	newdev.exe
1744	newdev.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
832	aspnet_compiler.exe
4280	powershell.exe
636	aspnet_compiler.exe
4280	powershell.exe
4668	aspnet_compiler.exe
4280	powershell.exe
3900	aspnet_compiler.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
4364	aspnet_compiler.exe
4280	powershell.exe
3544	aspnet_compiler.exe
4280	powershell.exe
2720	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 11 IoCs

pid	Process
3820	aspnet_compiler.exe
2832	wscript.exe
2832	wscript.exe
1744	newdev.exe
1744	newdev.exe
1744	newdev.exe
1744	newdev.exe
1744	newdev.exe
1744	newdev.exe
1744	newdev.exe
1744	newdev.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4280	powershell.exe
Token: SeDebugPrivilege	5508	taskkill.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2832 wrote to memory of 4280	2832	wscript.exe	87
PID 4280 wrote to memory of 464	4280	powershell.exe	89
PID 4280 wrote to memory of 2224	4280	powershell.exe	90
PID 4280 wrote to memory of 6020	4280	powershell.exe	91
PID 4280 wrote to memory of 3548	4280	powershell.exe	92
PID 4280 wrote to memory of 5872	4280	powershell.exe	93
PID 4280 wrote to memory of 3820	4280	powershell.exe	94
PID 4280 wrote to memory of 3820	4280	powershell.exe	94
PID 4280 wrote to memory of 3820	4280	powershell.exe	94
PID 2832 wrote to memory of 1744	2832	wscript.exe	95
PID 4280 wrote to memory of 5024	4280	powershell.exe	99
PID 4280 wrote to memory of 832	4280	powershell.exe	100
PID 4280 wrote to memory of 832	4280	powershell.exe	100
PID 4280 wrote to memory of 832	4280	powershell.exe	100
PID 4280 wrote to memory of 636	4280	powershell.exe	103
PID 4280 wrote to memory of 636	4280	powershell.exe	103
PID 4280 wrote to memory of 636	4280	powershell.exe	103
PID 4280 wrote to memory of 4668	4280	powershell.exe	106
PID 4280 wrote to memory of 4668	4280	powershell.exe	106
PID 4280 wrote to memory of 4668	4280	powershell.exe	106
PID 1744 wrote to memory of 2980	1744	newdev.exe	108
PID 4280 wrote to memory of 3900	4280	powershell.exe	109
PID 4280 wrote to memory of 3900	4280	powershell.exe	109
PID 4280 wrote to memory of 3900	4280	powershell.exe	109
PID 4280 wrote to memory of 5588	4280	powershell.exe	112
PID 4280 wrote to memory of 4364	4280	powershell.exe	113
PID 4280 wrote to memory of 4364	4280	powershell.exe	113
PID 4280 wrote to memory of 4364	4280	powershell.exe	113
PID 4280 wrote to memory of 3544	4280	powershell.exe	114
PID 4280 wrote to memory of 3544	4280	powershell.exe	114
PID 4280 wrote to memory of 3544	4280	powershell.exe	114
PID 1744 wrote to memory of 5736	1744	newdev.exe	115
PID 4280 wrote to memory of 2720	4280	powershell.exe	116
PID 4280 wrote to memory of 2720	4280	powershell.exe	116
PID 4280 wrote to memory of 2720	4280	powershell.exe	116
PID 2832 wrote to memory of 5508	2832	wscript.exe	117
PID 1744 wrote to memory of 2308	1744	newdev.exe	120

outlook_office_path 1 IoCs

description	ioc	Process
Key enumerated	\REGISTRY\USER\S-1-5-21-2684263265-1628758615-802431902-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	newdev.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmpsao01l4t.js
1⤵
- Badlisted process makes network request
- Checks computer location settings
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2832
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File "C:\Temp\ps_K1yTWOtw78Am_1780403491333.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4280
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:464
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2224
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:6020
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3548
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:5872
- - 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:3820
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:5024
- - 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:832
- - 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:636
- - 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:4668
- - 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:3900
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:5588
- - 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:4364
- - 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:3544
- - 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:2720
- C:\Windows\SysWOW64\newdev.exe
  "C:\Windows\SysWOW64\newdev.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  - outlook_office_path
  PID:1744
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    3⤵
    PID:2980
- - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
    3⤵
    PID:5736
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2308
- C:\Windows\System32\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im wscript.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:5508

C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
1⤵
PID:3532

C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
1⤵
PID:5916

C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe"
1⤵
PID:4672

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

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

ps_K1yTWOtw78Am_1780403491333.ps1

Path C:\Temp\ps_K1yTWOtw78Am_1780403491333.ps1
Size 1.4MB
SHA256 7689ba1a05e782922baedc4b4f31468d0a39063d8b114c64affeeff5ab901368
MD5 123a34d0787e2f3b42998ef0a9689f8c
SHA1 f5d0d4cf24c1a5671db501d9630dd1b59787370a
SHA512 8dd1efefd509655d756e0e626643dc9e8397af7039207673815056c1a8670fa2cd0b99a80b282bd38b9d1ce2028c89eab6ea7cc7b4c33bd0d95e8108733add20
SSDEEP 24576:fWgSwfYWKRY0FBGo9Yb4g3zp7CMLA8EdqDM3uyel1G6G8UK/AllZdubI9pBTgHYy:nXKRYl/EdxXenVaZdo2phEfD
TLSH
T188653300CF969C7B25BCA71DA0BF7E198B637EC2A84D9CE31495ADC7057C2468977828
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_sdhfq4de.mvk.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sdhfq4de.mvk.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

memory/1744-26-0x0000000000A60000-0x0000000000AA3000-memory.dmp

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memory/1744-24-0x0000000000A60000-0x0000000000AA3000-memory.dmp

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memory/2308-45-0x0000023E2B8E0000-0x0000023E2B9A7000-memory.dmp

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memory/2832-23-0x0000000000910000-0x0000000003A24000-memory.dmp

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memory/2832-42-0x0000029990940000-0x0000029990A1D000-memory.dmp

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memory/2832-29-0x0000029990940000-0x0000029990A1D000-memory.dmp

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memory/2832-28-0x0000000000910000-0x0000000003A24000-memory.dmp

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memory/2980-36-0x0000020AE9370000-0x0000020AE9472000-memory.dmp

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memory/3820-16-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/3820-20-0x00000000013C0000-0x000000000170C000-memory.dmp

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memory/3820-25-0x0000000000E90000-0x0000000000ED6000-memory.dmp

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memory/3820-21-0x0000000000E90000-0x0000000000ED6000-memory.dmp

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memory/3820-17-0x0000000000E90000-0x0000000000ED6000-memory.dmp

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memory/4280-22-0x000002A2585D0000-0x000002A2585E0000-memory.dmp

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memory/4280-18-0x000002A2585D0000-0x000002A2585E0000-memory.dmp

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memory/4280-1-0x000002A2585D0000-0x000002A2585E0000-memory.dmp

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memory/4280-19-0x000002A2585D0000-0x000002A2585E0000-memory.dmp

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memory/4280-14-0x000002A25B490000-0x000002A25B496000-memory.dmp

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memory/4280-13-0x000002A25B480000-0x000002A25B490000-memory.dmp

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memory/4280-11-0x000002A2585D0000-0x000002A2585E0000-memory.dmp

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memory/4280-8-0x000002A2585A0000-0x000002A2585C2000-memory.dmp

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memory/4280-2-0x000002A2585D0000-0x000002A2585E0000-memory.dmp

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memory/5736-43-0x00000238F42F0000-0x00000238F4403000-memory.dmp

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