formbook | 29f7df8459441a2eae26fe2934d1512ecc7dfde332bfd939af7430bceb9c9708

Analysis

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

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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

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/1804-15-0x0000000001000000-0x0000000001047000-memory.dmp	family_formbook
behavioral3/memory/1804-19-0x0000000001000000-0x0000000001047000-memory.dmp	family_formbook
behavioral3/memory/1804-24-0x0000000001000000-0x0000000001047000-memory.dmp	family_formbook
behavioral3/memory/4564-25-0x0000000000150000-0x0000000000194000-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	1652	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3328	powershell.exe

ConfuserEx .NET packer 3 IoCs

Detects ConfuserEx .NET packer.

resource	yara_rule
behavioral3/memory/3328-11-0x000001DBAE5C0000-0x000001DBAE5D4000-memory.dmp	ConfuserEx
behavioral3/memory/3328-13-0x000001DBAE870000-0x000001DBAE884000-memory.dmp	ConfuserEx
behavioral3/memory/3328-31-0x000001DB92990000-0x000001DB929A4000-memory.dmp	ConfuserEx

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 3328 set thread context of 1804	3328	powershell.exe	87
PID 1804 set thread context of 1652	1804	aspnet_compiler.exe	79
PID 1804 set thread context of 4564	1804	aspnet_compiler.exe	88
PID 3328 set thread context of 1448	3328	powershell.exe	89
PID 4564 set thread context of 1652	4564	mcbuilder.exe	79
PID 3328 set thread context of 2264	3328	powershell.exe	90
PID 3328 set thread context of 2152	3328	powershell.exe	91
PID 3328 set thread context of 2500	3328	powershell.exe	95
PID 3328 set thread context of 2388	3328	powershell.exe	97
PID 3328 set thread context of 2756	3328	powershell.exe	98
PID 3328 set thread context of 2088	3328	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	mcbuilder.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
3364	taskkill.exe

Suspicious behavior: EnumeratesProcesses 47 IoCs

pid	Process
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
1804	aspnet_compiler.exe
1804	aspnet_compiler.exe
1804	aspnet_compiler.exe
1804	aspnet_compiler.exe
3328	powershell.exe
4564	mcbuilder.exe
4564	mcbuilder.exe
4564	mcbuilder.exe
4564	mcbuilder.exe
3328	powershell.exe
1448	aspnet_compiler.exe
3328	powershell.exe
2264	aspnet_compiler.exe
3328	powershell.exe
2152	aspnet_compiler.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
2500	aspnet_compiler.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
2388	aspnet_compiler.exe
3328	powershell.exe
2756	aspnet_compiler.exe
3328	powershell.exe
3328	powershell.exe
3328	powershell.exe
2088	aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1804	aspnet_compiler.exe
1652	wscript.exe
1652	wscript.exe
4564	mcbuilder.exe
4564	mcbuilder.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3328	powershell.exe
Token: SeDebugPrivilege	3364	taskkill.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 3328	1652	wscript.exe	80
PID 3328 wrote to memory of 4668	3328	powershell.exe	82
PID 3328 wrote to memory of 1580	3328	powershell.exe	83
PID 3328 wrote to memory of 4624	3328	powershell.exe	84
PID 3328 wrote to memory of 3936	3328	powershell.exe	85
PID 3328 wrote to memory of 2184	3328	powershell.exe	86
PID 3328 wrote to memory of 1804	3328	powershell.exe	87
PID 3328 wrote to memory of 1804	3328	powershell.exe	87
PID 3328 wrote to memory of 1804	3328	powershell.exe	87
PID 1652 wrote to memory of 4564	1652	wscript.exe	88
PID 3328 wrote to memory of 1448	3328	powershell.exe	89
PID 3328 wrote to memory of 1448	3328	powershell.exe	89
PID 3328 wrote to memory of 1448	3328	powershell.exe	89
PID 3328 wrote to memory of 2264	3328	powershell.exe	90
PID 3328 wrote to memory of 2264	3328	powershell.exe	90
PID 3328 wrote to memory of 2264	3328	powershell.exe	90
PID 3328 wrote to memory of 2152	3328	powershell.exe	91
PID 3328 wrote to memory of 2152	3328	powershell.exe	91
PID 3328 wrote to memory of 2152	3328	powershell.exe	91
PID 3328 wrote to memory of 992	3328	powershell.exe	92
PID 3328 wrote to memory of 2468	3328	powershell.exe	93
PID 3328 wrote to memory of 4384	3328	powershell.exe	94
PID 3328 wrote to memory of 2500	3328	powershell.exe	95
PID 3328 wrote to memory of 2500	3328	powershell.exe	95
PID 3328 wrote to memory of 2500	3328	powershell.exe	95
PID 3328 wrote to memory of 4380	3328	powershell.exe	96
PID 3328 wrote to memory of 2388	3328	powershell.exe	97
PID 3328 wrote to memory of 2388	3328	powershell.exe	97
PID 3328 wrote to memory of 2388	3328	powershell.exe	97
PID 3328 wrote to memory of 2756	3328	powershell.exe	98
PID 3328 wrote to memory of 2756	3328	powershell.exe	98
PID 3328 wrote to memory of 2756	3328	powershell.exe	98
PID 3328 wrote to memory of 4772	3328	powershell.exe	99
PID 3328 wrote to memory of 2088	3328	powershell.exe	100
PID 3328 wrote to memory of 2088	3328	powershell.exe	100
PID 3328 wrote to memory of 2088	3328	powershell.exe	100
PID 1652 wrote to memory of 3364	1652	wscript.exe	102

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmp7s_u77ll.js
1⤵
- Badlisted process makes network request
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File "C:\Temp\ps_AvUsmT9FghVm_1779492219059.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3328
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    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⤵
    PID:1580
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4624
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:3936
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2184
- - 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:1804
- - 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:1448
- - 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:2264
- - 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:2152
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:992
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:2468
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4384
- - 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:2500
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4380
- - 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:2388
- - 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:2756
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    PID:4772
- - 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:2088
- 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:4564
- C:\Windows\System32\taskkill.exe
  "C:\Windows\System32\taskkill.exe" /f /im wscript.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:3364

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_AvUsmT9FghVm_1779492219059.ps1

Path C:\Temp\ps_AvUsmT9FghVm_1779492219059.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_5d3xvnqv.e4w.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5d3xvnqv.e4w.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/1652-36-0x000001980FED0000-0x000001980FFBB000-memory.dmp

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memory/1652-28-0x000001980FED0000-0x000001980FFBB000-memory.dmp

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memory/1652-27-0x0000000000120000-0x000000000295D000-memory.dmp

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memory/1652-21-0x0000000000120000-0x000000000295D000-memory.dmp

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memory/1804-18-0x00000000015B0000-0x0000000001906000-memory.dmp

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memory/1804-24-0x0000000001000000-0x0000000001047000-memory.dmp

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memory/1804-14-0x0000000000400000-0x0000000000447000-memory.dmp

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memory/1804-15-0x0000000001000000-0x0000000001047000-memory.dmp

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memory/1804-19-0x0000000001000000-0x0000000001047000-memory.dmp

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memory/3328-11-0x000001DBAE5C0000-0x000001DBAE5D4000-memory.dmp

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memory/3328-17-0x000001DB92BD0000-0x000001DB92BE0000-memory.dmp

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memory/3328-16-0x000001DB92BD0000-0x000001DB92BE0000-memory.dmp

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memory/3328-20-0x000001DB92BD0000-0x000001DB92BE0000-memory.dmp

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memory/3328-13-0x000001DBAE870000-0x000001DBAE884000-memory.dmp

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memory/3328-12-0x000001DBAE840000-0x000001DBAE846000-memory.dmp

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memory/3328-1-0x000001DB92BD0000-0x000001DB92BE0000-memory.dmp

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memory/3328-9-0x000001DB92BD0000-0x000001DB92BE0000-memory.dmp

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memory/3328-31-0x000001DB92990000-0x000001DB929A4000-memory.dmp

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memory/3328-2-0x000001DBAE5D0000-0x000001DBAE5F2000-memory.dmp

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memory/4564-22-0x0000000000150000-0x0000000000194000-memory.dmp

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memory/4564-25-0x0000000000150000-0x0000000000194000-memory.dmp

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