formbook | bd125b43ba0f49c2ee59c8d9c78e35e3a56b578b770ce1e8dfd9b541c3974fb2

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
02/06/2026, 11:55

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General

Target
tmpo6egw2y8.js
Size 2.8MB
Sample260602-n3f57act6t
SHA256 bd125b43ba0f49c2ee59c8d9c78e35e3a56b578b770ce1e8dfd9b541c3974fb2
MD5 6b937f2de276f008fb156c82391995a7
SHA1 a3fc2c6c6872f613f83db5306cbfefe591727a0f
SHA512 0fa11ac1e619dd1c9d85fe47f1c74fd5b8360e660154214cc793eabcf53f7cec4266a4b64631ec673daa28fc4e391b878510532b14067657a0100c92432aae3d
SSDEEP 49152:avMSPQ9NzE5epwK/OD3sLgV/mpk0wHZSIZsM12LlYhGRaSemtEQVfHUh:2
TLSH
T175D56C17D66F974E18093B61006A5D9AFE99CAFCEF727BC4E0CF90B614EA1110B851B3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

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
behavioral2/memory/228-18-0x0000000000E40000-0x0000000000E87000-memory.dmp	family_formbook
behavioral2/memory/228-20-0x0000000000E40000-0x0000000000E87000-memory.dmp	family_formbook
behavioral2/memory/228-25-0x0000000000E40000-0x0000000000E87000-memory.dmp	family_formbook
behavioral2/memory/3540-26-0x0000000000400000-0x0000000000444000-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
45	4264	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2044	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-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	wscript.exe

ConfuserEx .NET packer 1 IoCs

Detects ConfuserEx .NET packer.

resource	yara_rule
behavioral2/memory/2044-13-0x0000017A8DBD0000-0x0000017A8DBDC000-memory.dmp	ConfuserEx

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 2044 set thread context of 228	2044	powershell.exe	98
PID 228 set thread context of 4264	228	aspnet_compiler.exe	88
PID 228 set thread context of 3540	228	aspnet_compiler.exe	99
PID 2044 set thread context of 4012	2044	powershell.exe	101
PID 3540 set thread context of 4264	3540	mcbuilder.exe	88
PID 2044 set thread context of 4176	2044	powershell.exe	104
PID 2044 set thread context of 2432	2044	powershell.exe	109
PID 2044 set thread context of 2720	2044	powershell.exe	115
PID 2044 set thread context of 4896	2044	powershell.exe	120
PID 2044 set thread context of 1192	2044	powershell.exe	121
PID 2044 set thread context of 4068	2044	powershell.exe	123

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
5028	taskkill.exe

Suspicious behavior: EnumeratesProcesses 49 IoCs

pid	Process
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
228	aspnet_compiler.exe
228	aspnet_compiler.exe
228	aspnet_compiler.exe
228	aspnet_compiler.exe
2044	powershell.exe
3540	mcbuilder.exe
3540	mcbuilder.exe
3540	mcbuilder.exe
3540	mcbuilder.exe
2044	powershell.exe
4012	aspnet_compiler.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
4176	aspnet_compiler.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
2432	aspnet_compiler.exe
2044	powershell.exe
2720	aspnet_compiler.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
4896	aspnet_compiler.exe
2044	powershell.exe
1192	aspnet_compiler.exe
2044	powershell.exe
2044	powershell.exe
2044	powershell.exe
4068	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
228	aspnet_compiler.exe
4264	wscript.exe
4264	wscript.exe
3540	mcbuilder.exe
3540	mcbuilder.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2044	powershell.exe
Token: SeDebugPrivilege	5028	taskkill.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 4264 wrote to memory of 2044	4264	wscript.exe	90
PID 2044 wrote to memory of 2588	2044	powershell.exe	92
PID 2044 wrote to memory of 1604	2044	powershell.exe	93
PID 2044 wrote to memory of 732	2044	powershell.exe	94
PID 2044 wrote to memory of 2700	2044	powershell.exe	95
PID 2044 wrote to memory of 2640	2044	powershell.exe	96
PID 2044 wrote to memory of 220	2044	powershell.exe	97
PID 2044 wrote to memory of 228	2044	powershell.exe	98
PID 2044 wrote to memory of 228	2044	powershell.exe	98
PID 2044 wrote to memory of 228	2044	powershell.exe	98
PID 4264 wrote to memory of 3540	4264	wscript.exe	99
PID 2044 wrote to memory of 4012	2044	powershell.exe	101
PID 2044 wrote to memory of 4012	2044	powershell.exe	101
PID 2044 wrote to memory of 4012	2044	powershell.exe	101
PID 2044 wrote to memory of 3892	2044	powershell.exe	102
PID 2044 wrote to memory of 3324	2044	powershell.exe	103
PID 2044 wrote to memory of 4176	2044	powershell.exe	104
PID 2044 wrote to memory of 4176	2044	powershell.exe	104
PID 2044 wrote to memory of 4176	2044	powershell.exe	104
PID 2044 wrote to memory of 3656	2044	powershell.exe	108
PID 2044 wrote to memory of 2432	2044	powershell.exe	109
PID 2044 wrote to memory of 2432	2044	powershell.exe	109
PID 2044 wrote to memory of 2432	2044	powershell.exe	109
PID 2044 wrote to memory of 2720	2044	powershell.exe	115
PID 2044 wrote to memory of 2720	2044	powershell.exe	115
PID 2044 wrote to memory of 2720	2044	powershell.exe	115
PID 2044 wrote to memory of 2024	2044	powershell.exe	119
PID 2044 wrote to memory of 4896	2044	powershell.exe	120
PID 2044 wrote to memory of 4896	2044	powershell.exe	120
PID 2044 wrote to memory of 4896	2044	powershell.exe	120
PID 2044 wrote to memory of 1192	2044	powershell.exe	121
PID 2044 wrote to memory of 1192	2044	powershell.exe	121
PID 2044 wrote to memory of 1192	2044	powershell.exe	121
PID 2044 wrote to memory of 3476	2044	powershell.exe	122
PID 2044 wrote to memory of 4068	2044	powershell.exe	123
PID 2044 wrote to memory of 4068	2044	powershell.exe	123
PID 2044 wrote to memory of 4068	2044	powershell.exe	123
PID 4264 wrote to memory of 5028	4264	wscript.exe	125

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmpo6egw2y8.js
1⤵
- Badlisted process makes network request
- Checks computer location settings
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4264
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File "C:\Temp\ps_QdVhWBarT4YR_1780401311398.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2044
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2588
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1604
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:732
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2700
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2640
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:220
- - 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:228
- - 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:4012
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3892
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3324
- - 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:4176
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3656
- - 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:2432
- - 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\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2024
- - 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:4896
- - 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:1192
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3476
- - 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:4068
- C:\Windows\SysWOW64\mcbuilder.exe
  "C:\Windows\SysWOW64\mcbuilder.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:3540
- C:\Windows\System32\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im wscript.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:5028

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

ps_QdVhWBarT4YR_1780401311398.ps1

Path C:\Temp\ps_QdVhWBarT4YR_1780401311398.ps1
Size 2.1MB
SHA256 6b8dee9a582703aed5800f5bd8d1b0362f58ee80746b7f6be88cccb8534fd0e6
MD5 2ed1eb979cee83641420c538f4fdaa29
SHA1 16825edd046380b9fc6335ac9e0676aa3e52cfb8
SHA512 1f3b104d642edb6da833d83e384abc84080f7aba0a1fec4b64d46dd0bde7703483367990204004e6fbfcaeee07c0e832e51ef8a76fecd20e18f980d23282bf69
SSDEEP 24576:Qt88iK13t5aofomKz14m7qdCYli5M4wwCO7t4K+BBVxjBVQASoLUxkjpsPOowS:P
TLSH
T1FEA5BFCAD16E44D29C053FC998242AC78B2586328A7400283A7F7D499F775FFC15EEE6
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_m2yphprr.afi.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_m2yphprr.afi.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/228-15-0x0000000000400000-0x0000000000447000-memory.dmp

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memory/228-25-0x0000000000E40000-0x0000000000E87000-memory.dmp

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memory/228-20-0x0000000000E40000-0x0000000000E87000-memory.dmp

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memory/228-19-0x00000000013D0000-0x000000000171A000-memory.dmp

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memory/228-18-0x0000000000E40000-0x0000000000E87000-memory.dmp

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memory/2044-17-0x0000017A8D9E0000-0x0000017A8D9F0000-memory.dmp

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memory/2044-21-0x0000017A8D9E0000-0x0000017A8D9F0000-memory.dmp

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memory/2044-13-0x0000017A8DBD0000-0x0000017A8DBDC000-memory.dmp

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memory/2044-1-0x0000017A8D9E0000-0x0000017A8D9F0000-memory.dmp

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memory/2044-16-0x0000017A8D9E0000-0x0000017A8D9F0000-memory.dmp

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memory/2044-12-0x0000017A8D9E0000-0x0000017A8D9F0000-memory.dmp

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memory/2044-10-0x0000017AA81C0000-0x0000017AA81E2000-memory.dmp

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memory/2044-14-0x0000017A8D9E0000-0x0000017A8D9F0000-memory.dmp

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memory/2044-2-0x0000017A8D9E0000-0x0000017A8D9F0000-memory.dmp

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memory/2044-23-0x0000017A8D9E0000-0x0000017A8D9F0000-memory.dmp

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memory/3540-24-0x0000000000400000-0x0000000000444000-memory.dmp

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memory/3540-26-0x0000000000400000-0x0000000000444000-memory.dmp

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memory/4264-22-0x0000000000650000-0x000000000299F000-memory.dmp

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memory/4264-28-0x0000000000650000-0x000000000299F000-memory.dmp

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memory/4264-29-0x000001C10A7F0000-0x000001C10A899000-memory.dmp

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memory/4264-36-0x000001C10A7F0000-0x000001C10A899000-memory.dmp

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