formbook | f0475f078629d76036bf116bfd0eeb83100242590ef59643c43a1aecb5e29b8c

Analysis

max time kernel
149s
max time network
96s
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, 23:25

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General

Target
tmpvn5mz0po.js
Size 2.8MB
Sample260522-3eq3tags5p
SHA256 f0475f078629d76036bf116bfd0eeb83100242590ef59643c43a1aecb5e29b8c
MD5 a63cd64295171bf70052b3a3f830674b
SHA1 49df4f131cc05f5994d16c11ca87be2b46b62998
SHA512 8065bd14145c154f96ae3af46e133aabd9bb0eb6818f1034eee6f4a5cb201d096b4053fa22aec40d702242624e3822f08c714b1451df4fc3df0ebd4a6cdd15bd
SSDEEP 49152:OL/5xSG0ZHiX2GntEGSMBKV9IOOxWhuUb6kxGGsQKcMPN3YiV9vFXChjDyUn3L2C:z
TLSH
T191D55B17D66F974E180D3B61006A5D9AFE89CAFCEF726BC4E0CF90B610EA1110B855B7
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
behavioral3/memory/3260-14-0x00000000012F0000-0x0000000001336000-memory.dmp	family_formbook
behavioral3/memory/3260-18-0x00000000012F0000-0x0000000001336000-memory.dmp	family_formbook
behavioral3/memory/3260-23-0x00000000012F0000-0x0000000001336000-memory.dmp	family_formbook
behavioral3/memory/4700-24-0x00000000005B0000-0x00000000005F3000-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	2144	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
784	powershell.exe

ConfuserEx .NET packer 1 IoCs

Detects ConfuserEx .NET packer.

resource	yara_rule
behavioral3/memory/784-12-0x000001947E620000-0x000001947E62C000-memory.dmp	ConfuserEx

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 784 set thread context of 3260	784	powershell.exe	88
PID 3260 set thread context of 2144	3260	aspnet_compiler.exe	79
PID 3260 set thread context of 4700	3260	aspnet_compiler.exe	89
PID 784 set thread context of 580	784	powershell.exe	91
PID 4700 set thread context of 2144	4700	msra.exe	79
PID 784 set thread context of 3772	784	powershell.exe	92
PID 784 set thread context of 3336	784	powershell.exe	93
PID 784 set thread context of 3848	784	powershell.exe	94
PID 784 set thread context of 2076	784	powershell.exe	96
PID 784 set thread context of 5512	784	powershell.exe	97
PID 784 set thread context of 4212	784	powershell.exe	100

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	msra.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
2888	taskkill.exe

Suspicious behavior: EnumeratesProcesses 47 IoCs

pid	Process
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
3260	aspnet_compiler.exe
3260	aspnet_compiler.exe
3260	aspnet_compiler.exe
3260	aspnet_compiler.exe
784	powershell.exe
4700	msra.exe
4700	msra.exe
4700	msra.exe
4700	msra.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
580	aspnet_compiler.exe
784	powershell.exe
3772	aspnet_compiler.exe
784	powershell.exe
3336	aspnet_compiler.exe
784	powershell.exe
3848	aspnet_compiler.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
2076	aspnet_compiler.exe
784	powershell.exe
5512	aspnet_compiler.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
784	powershell.exe
4212	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
3260	aspnet_compiler.exe
2144	wscript.exe
2144	wscript.exe
4700	msra.exe
4700	msra.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	784	powershell.exe
Token: SeDebugPrivilege	2888	taskkill.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2144 wrote to memory of 784	2144	wscript.exe	80
PID 784 wrote to memory of 2608	784	powershell.exe	82
PID 784 wrote to memory of 5208	784	powershell.exe	83
PID 784 wrote to memory of 4440	784	powershell.exe	84
PID 784 wrote to memory of 1900	784	powershell.exe	85
PID 784 wrote to memory of 4484	784	powershell.exe	86
PID 784 wrote to memory of 5424	784	powershell.exe	87
PID 784 wrote to memory of 3260	784	powershell.exe	88
PID 784 wrote to memory of 3260	784	powershell.exe	88
PID 784 wrote to memory of 3260	784	powershell.exe	88
PID 2144 wrote to memory of 4700	2144	wscript.exe	89
PID 784 wrote to memory of 892	784	powershell.exe	90
PID 784 wrote to memory of 580	784	powershell.exe	91
PID 784 wrote to memory of 580	784	powershell.exe	91
PID 784 wrote to memory of 580	784	powershell.exe	91
PID 784 wrote to memory of 3772	784	powershell.exe	92
PID 784 wrote to memory of 3772	784	powershell.exe	92
PID 784 wrote to memory of 3772	784	powershell.exe	92
PID 784 wrote to memory of 3336	784	powershell.exe	93
PID 784 wrote to memory of 3336	784	powershell.exe	93
PID 784 wrote to memory of 3336	784	powershell.exe	93
PID 784 wrote to memory of 3848	784	powershell.exe	94
PID 784 wrote to memory of 3848	784	powershell.exe	94
PID 784 wrote to memory of 3848	784	powershell.exe	94
PID 784 wrote to memory of 1244	784	powershell.exe	95
PID 784 wrote to memory of 2076	784	powershell.exe	96
PID 784 wrote to memory of 2076	784	powershell.exe	96
PID 784 wrote to memory of 2076	784	powershell.exe	96
PID 784 wrote to memory of 5512	784	powershell.exe	97
PID 784 wrote to memory of 5512	784	powershell.exe	97
PID 784 wrote to memory of 5512	784	powershell.exe	97
PID 784 wrote to memory of 1828	784	powershell.exe	98
PID 784 wrote to memory of 4312	784	powershell.exe	99
PID 784 wrote to memory of 4212	784	powershell.exe	100
PID 784 wrote to memory of 4212	784	powershell.exe	100
PID 784 wrote to memory of 4212	784	powershell.exe	100
PID 2144 wrote to memory of 2888	2144	wscript.exe	102

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmpvn5mz0po.js
1⤵
- Badlisted process makes network request
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2144
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File "C:\Temp\ps_xfyY48AsBwll_1779492358972.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:784
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2608
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:5208
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4440
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1900
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4484
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:5424
- - 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:3260
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:892
- - 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:580
- - 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:3772
- - 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:3336
- - 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:3848
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1244
- - 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:5512
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:1828
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4312
- - 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:4212
- C:\Windows\SysWOW64\msra.exe
  "C:\Windows\SysWOW64\msra.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:4700
- C:\Windows\System32\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im wscript.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:2888

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

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_xfyY48AsBwll_1779492358972.ps1

Path C:\Temp\ps_xfyY48AsBwll_1779492358972.ps1
Size 2.1MB
SHA256 053f0ca29e2a7c0edeaf882a4d1dbcfa6224c580a9b6fab0799f2f541e4c8a42
MD5 78dfda21765de801f2e8dd626939cebf
SHA1 461800c6c6e876cb48a7a478278d294bc51817c5
SHA512 f5911dce443e09c44b79e0999e348b72d0d4c9475d5d2f9c21577416e18bbd2a04f3f9dde7a1122c0e2fc0ba846a2be75db5389cbb34aa72a8fe9e042bc44d66
SSDEEP 24576:UlaWC9twF4UK1LbsrBz2x7l4YtjPsIVLhr:z
TLSH
T161A5CFCAD16E44D29C053FC9A8142BC78B2546728A740028367FBD498F7B5FEC15EEE6
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_ksqqo0ag.evh.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ksqqo0ag.evh.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/784-12-0x000001947E620000-0x000001947E62C000-memory.dmp

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memory/784-8-0x000001947E590000-0x000001947E5B2000-memory.dmp

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memory/784-10-0x000001947A830000-0x000001947A840000-memory.dmp

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memory/784-1-0x000001947A830000-0x000001947A840000-memory.dmp

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memory/784-16-0x000001947A830000-0x000001947A840000-memory.dmp

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memory/784-15-0x000001947A830000-0x000001947A840000-memory.dmp

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memory/784-2-0x000001947A830000-0x000001947A840000-memory.dmp

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memory/784-19-0x000001947A830000-0x000001947A840000-memory.dmp

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memory/2144-20-0x0000000000CB0000-0x0000000003B27000-memory.dmp

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memory/2144-34-0x0000029EF4830000-0x0000029EF4917000-memory.dmp

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memory/2144-27-0x0000029EF4830000-0x0000029EF4917000-memory.dmp

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memory/2144-26-0x0000000000CB0000-0x0000000003B27000-memory.dmp

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memory/3260-14-0x00000000012F0000-0x0000000001336000-memory.dmp

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memory/3260-23-0x00000000012F0000-0x0000000001336000-memory.dmp

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memory/3260-18-0x00000000012F0000-0x0000000001336000-memory.dmp

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memory/3260-17-0x0000000001850000-0x0000000001BA6000-memory.dmp

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memory/3260-13-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/4700-21-0x00000000005B0000-0x00000000005F3000-memory.dmp

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memory/4700-24-0x00000000005B0000-0x00000000005F3000-memory.dmp

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