formbook | 29f7df8459441a2eae26fe2934d1512ecc7dfde332bfd939af7430bceb9c9708

Analysis

max time kernel
149s
max time network
150s
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, 23:23

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General

Target
tmp7s_u77ll.js
Size 3.0MB
Sample260522-3dendsax3s
SHA256 29f7df8459441a2eae26fe2934d1512ecc7dfde332bfd939af7430bceb9c9708
MD5 b72caad0294d03b5d9b22f4b65afd600
SHA1 7d4a44e091e1c5f95a0ef54ce9f8e7a7ba86577b
SHA512 66bc98e047968bcfe632e0f24bc279cea370a8ff86302908b875889d61d23eb3f72ac010067be2eacd580407491f5f6baae70cebb03b0afdea72b100a0708a3f
SSDEEP 49152:hr8VaFquOrIVcqPwgLK641f3PD2984vpW2kv5+5ICes2AJ:/
TLSH
T11FE55B17D66F974E18093B61106A5D9AFE89CAFCEF726BC4E0CF90B210EE1110B855B7
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/4788-16-0x0000000000F20000-0x0000000000F67000-memory.dmp	family_formbook
behavioral1/memory/4788-20-0x0000000000F20000-0x0000000000F67000-memory.dmp	family_formbook
behavioral1/memory/4788-27-0x0000000000F20000-0x0000000000F67000-memory.dmp	family_formbook
behavioral1/memory/1920-29-0x0000000000B20000-0x0000000000B64000-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
9	4588	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1936	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-1-5-21-4146128427-3460078792-3629963422-1000\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-1-5-21-4146128427-3460078792-3629963422-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mcbuilder.exe

ConfuserEx .NET packer 3 IoCs

Detects ConfuserEx .NET packer.

resource	yara_rule
behavioral1/memory/1936-13-0x00000241BB100000-0x00000241BB114000-memory.dmp	ConfuserEx
behavioral1/memory/1936-38-0x00000241A2AA0000-0x00000241A2AB4000-memory.dmp	ConfuserEx
behavioral1/memory/1936-46-0x00000241BD950000-0x00000241BD964000-memory.dmp	ConfuserEx

Suspicious use of SetThreadContext 13 IoCs

description	pid	Process	procid_target
PID 1936 set thread context of 4788	1936	powershell.exe	89
PID 4788 set thread context of 4588	4788	aspnet_compiler.exe	81
PID 4788 set thread context of 1920	4788	aspnet_compiler.exe	90
PID 1936 set thread context of 2076	1936	powershell.exe	92
PID 1920 set thread context of 4588	1920	mcbuilder.exe	81
PID 1936 set thread context of 3976	1936	powershell.exe	93
PID 1936 set thread context of 1044	1936	powershell.exe	94
PID 1936 set thread context of 1232	1936	powershell.exe	98
PID 1920 set thread context of 2308	1920	mcbuilder.exe	97
PID 1936 set thread context of 3816	1936	powershell.exe	101
PID 1936 set thread context of 4900	1936	powershell.exe	103
PID 1936 set thread context of 1312	1936	powershell.exe	107
PID 1920 set thread context of 4176	1920	mcbuilder.exe	104

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	mcbuilder.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
1432	taskkill.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-4146128427-3460078792-3629963422-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	mcbuilder.exe

Suspicious behavior: EnumeratesProcesses 39 IoCs

pid	Process
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
4788	aspnet_compiler.exe
4788	aspnet_compiler.exe
4788	aspnet_compiler.exe
4788	aspnet_compiler.exe
1936	powershell.exe
1920	mcbuilder.exe
1920	mcbuilder.exe
1920	mcbuilder.exe
1920	mcbuilder.exe
1936	powershell.exe
2076	aspnet_compiler.exe
1936	powershell.exe
3976	aspnet_compiler.exe
1936	powershell.exe
1044	aspnet_compiler.exe
1936	powershell.exe
1232	aspnet_compiler.exe
1936	powershell.exe
3816	aspnet_compiler.exe
1936	powershell.exe
1936	powershell.exe
1936	powershell.exe
4900	aspnet_compiler.exe
1936	powershell.exe
1312	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 9 IoCs

pid	Process
4788	aspnet_compiler.exe
4588	wscript.exe
4588	wscript.exe
1920	mcbuilder.exe
1920	mcbuilder.exe
1920	mcbuilder.exe
1920	mcbuilder.exe
1920	mcbuilder.exe
1920	mcbuilder.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	powershell.exe
Token: SeDebugPrivilege	1432	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 4588 wrote to memory of 1936	4588	wscript.exe	82
PID 1936 wrote to memory of 4996	1936	powershell.exe	84
PID 1936 wrote to memory of 4316	1936	powershell.exe	85
PID 1936 wrote to memory of 3304	1936	powershell.exe	86
PID 1936 wrote to memory of 4976	1936	powershell.exe	87
PID 1936 wrote to memory of 4252	1936	powershell.exe	88
PID 1936 wrote to memory of 4788	1936	powershell.exe	89
PID 1936 wrote to memory of 4788	1936	powershell.exe	89
PID 1936 wrote to memory of 4788	1936	powershell.exe	89
PID 4588 wrote to memory of 1920	4588	wscript.exe	90
PID 1936 wrote to memory of 2076	1936	powershell.exe	92
PID 1936 wrote to memory of 2076	1936	powershell.exe	92
PID 1936 wrote to memory of 2076	1936	powershell.exe	92
PID 1936 wrote to memory of 3976	1936	powershell.exe	93
PID 1936 wrote to memory of 3976	1936	powershell.exe	93
PID 1936 wrote to memory of 3976	1936	powershell.exe	93
PID 1936 wrote to memory of 1044	1936	powershell.exe	94
PID 1936 wrote to memory of 1044	1936	powershell.exe	94
PID 1936 wrote to memory of 1044	1936	powershell.exe	94
PID 1920 wrote to memory of 2308	1920	mcbuilder.exe	97
PID 1936 wrote to memory of 1232	1936	powershell.exe	98
PID 1936 wrote to memory of 1232	1936	powershell.exe	98
PID 1936 wrote to memory of 1232	1936	powershell.exe	98
PID 1936 wrote to memory of 3816	1936	powershell.exe	101
PID 1936 wrote to memory of 3816	1936	powershell.exe	101
PID 1936 wrote to memory of 3816	1936	powershell.exe	101
PID 1936 wrote to memory of 848	1936	powershell.exe	102
PID 1936 wrote to memory of 4900	1936	powershell.exe	103
PID 1936 wrote to memory of 4900	1936	powershell.exe	103
PID 1936 wrote to memory of 4900	1936	powershell.exe	103
PID 1920 wrote to memory of 4176	1920	mcbuilder.exe	104
PID 1936 wrote to memory of 1312	1936	powershell.exe	107
PID 1936 wrote to memory of 1312	1936	powershell.exe	107
PID 1936 wrote to memory of 1312	1936	powershell.exe	107
PID 4588 wrote to memory of 1432	4588	wscript.exe	109

outlook_office_path 1 IoCs

description	ioc	Process
Key enumerated	\REGISTRY\USER\S-1-5-21-4146128427-3460078792-3629963422-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mcbuilder.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmp7s_u77ll.js
1⤵
- Badlisted process makes network request
- Checks computer location settings
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4588
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File "C:\Temp\ps_h9pJFmL5Mxyn_1779492218189.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1936
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4996
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4316
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3304
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4976
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4252
- - 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:4788
- - 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:2076
- - 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:3976
- - 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:1044
- - 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:1232
- - 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:3816
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:848
- - 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:4900
- - 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:1312
- C:\Windows\SysWOW64\mcbuilder.exe
  "C:\Windows\SysWOW64\mcbuilder.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:1920
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    3⤵
    PID:2308
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:4176
- C:\Windows\System32\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im wscript.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:1432

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:1944

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:3212

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_h9pJFmL5Mxyn_1779492218189.ps1

Path C:\Temp\ps_h9pJFmL5Mxyn_1779492218189.ps1
Size 2.2MB
SHA256 4e56cedc87d5a6b6751ef4036f80246b54a02bd261f5d7a806e64d6ca02fd294
MD5 87f71d38b1f5cd4dbfe5f5d269b6b3b9
SHA1 f5326ef0f013f54d9d54e6ce1d33847d3138d4b7
SHA512 a8271b52c2c8b0a35af570f84b77af00f1aeacb2b2e50c9da8bd3ee4e39397acfe68046c7e9fd9cf303a484042d658d5cd1457fdc7ef47624f3a4cd7205d70d1
SSDEEP 24576:Io2AGpEXfDTiGFFjYFcMI5qu3DRbmn6A2N+IO5P2Mi8/DAqU9VOi/L3eLPN3m4ot:l
TLSH
T1A2B5BFDAD16E44D29C053FC9A8142BC78B2546728E7400283A6FBD499F774FEC05EEE6
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_ckxvsdmt.0ue.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ckxvsdmt.0ue.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/1920-29-0x0000000000B20000-0x0000000000B64000-memory.dmp

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memory/1920-25-0x0000000000B20000-0x0000000000B64000-memory.dmp

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memory/1936-21-0x00000241BB120000-0x00000241BB130000-memory.dmp

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memory/1936-10-0x00000241BB0D0000-0x00000241BB0F2000-memory.dmp

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memory/1936-13-0x00000241BB100000-0x00000241BB114000-memory.dmp

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memory/1936-14-0x00000241BB110000-0x00000241BB116000-memory.dmp

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memory/1936-18-0x00000241BB120000-0x00000241BB130000-memory.dmp

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memory/1936-17-0x00000241BB120000-0x00000241BB130000-memory.dmp

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memory/1936-46-0x00000241BD950000-0x00000241BD964000-memory.dmp

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memory/1936-38-0x00000241A2AA0000-0x00000241A2AB4000-memory.dmp

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memory/1936-2-0x00000241BB120000-0x00000241BB130000-memory.dmp

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memory/1936-11-0x00000241BB120000-0x00000241BB130000-memory.dmp

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memory/1936-1-0x00000241BB120000-0x00000241BB130000-memory.dmp

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memory/2308-40-0x0000027709C60000-0x0000027709D81000-memory.dmp

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memory/4176-48-0x0000027282DB0000-0x0000027282E64000-memory.dmp

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memory/4588-31-0x0000000000FA0000-0x00000000026CE000-memory.dmp

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memory/4588-24-0x0000000000FA0000-0x00000000026CE000-memory.dmp

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memory/4588-32-0x000001DFC1570000-0x000001DFC1686000-memory.dmp

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memory/4588-49-0x000001DFC1570000-0x000001DFC1686000-memory.dmp

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memory/4788-26-0x0000000000F20000-0x0000000000F67000-memory.dmp

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memory/4788-28-0x0000000001940000-0x0000000001964000-memory.dmp

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memory/4788-27-0x0000000000F20000-0x0000000000F67000-memory.dmp

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memory/4788-23-0x0000000001940000-0x0000000001964000-memory.dmp

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memory/4788-22-0x0000000000F20000-0x0000000000F67000-memory.dmp

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memory/4788-20-0x0000000000F20000-0x0000000000F67000-memory.dmp

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memory/4788-19-0x00000000015C0000-0x000000000190C000-memory.dmp

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memory/4788-16-0x0000000000F20000-0x0000000000F67000-memory.dmp

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memory/4788-15-0x0000000000400000-0x0000000000447000-memory.dmp

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