formbook | b57ce95b3dff59901ccc6dbd3b5139dc285bf8723d65bf34434d0369ebb3cd8e

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
23/05/2026, 00:55

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General

Target
tmpukiimhn6.js
Size 2.0MB
Sample260523-a97ptscs8x
SHA256 b57ce95b3dff59901ccc6dbd3b5139dc285bf8723d65bf34434d0369ebb3cd8e
MD5 1c198165686703dcd7bc83d4f118b896
SHA1 f7ad9b9857360293c6ef76353bbe8b2f42761fd7
SHA512 bc279e2c9b921a48fc5313342b2860e92afddf5f9bbcece1210e34ef695da45a32be0e118c4b270f69c0d637b2b6525396e1c145ff096c4eb09efc2264679442
SSDEEP 49152:10DeJS6TQzEwQkKq+tZOwYr/NmssNZ0p8:b
TLSH
T17E95D00845D45FDCEE1D4C25ACF567AF537276A3CCED80ACB661BD829A43832C816BC9
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/2800-16-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral3/memory/2800-18-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral3/memory/2800-23-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral3/memory/1556-24-0x0000000000800000-0x0000000000843000-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	3808	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4432	powershell.exe

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 4432 set thread context of 2800	4432	powershell.exe	82
PID 2800 set thread context of 3808	2800	Aspnet_compiler.exe	79
PID 2800 set thread context of 1556	2800	Aspnet_compiler.exe	83
PID 4432 set thread context of 1524	4432	powershell.exe	84
PID 1556 set thread context of 3808	1556	msdt.exe	79
PID 4432 set thread context of 2780	4432	powershell.exe	85
PID 4432 set thread context of 1008	4432	powershell.exe	87
PID 4432 set thread context of 564	4432	powershell.exe	88
PID 4432 set thread context of 4732	4432	powershell.exe	89
PID 4432 set thread context of 3744	4432	powershell.exe	91
PID 4432 set thread context of 3620	4432	powershell.exe	92

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	msdt.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
3936	taskkill.exe

Suspicious behavior: EnumeratesProcesses 46 IoCs

pid	Process
4432	powershell.exe
4432	powershell.exe
4432	powershell.exe
4432	powershell.exe
2800	Aspnet_compiler.exe
2800	Aspnet_compiler.exe
2800	Aspnet_compiler.exe
2800	Aspnet_compiler.exe
2800	Aspnet_compiler.exe
2800	Aspnet_compiler.exe
2800	Aspnet_compiler.exe
2800	Aspnet_compiler.exe
4432	powershell.exe
1556	msdt.exe
1556	msdt.exe
1556	msdt.exe
1556	msdt.exe
1556	msdt.exe
1556	msdt.exe
1556	msdt.exe
1556	msdt.exe
4432	powershell.exe
1524	Aspnet_compiler.exe
1524	Aspnet_compiler.exe
4432	powershell.exe
2780	Aspnet_compiler.exe
2780	Aspnet_compiler.exe
4432	powershell.exe
4432	powershell.exe
4432	powershell.exe
1008	Aspnet_compiler.exe
1008	Aspnet_compiler.exe
4432	powershell.exe
564	Aspnet_compiler.exe
564	Aspnet_compiler.exe
4432	powershell.exe
4732	Aspnet_compiler.exe
4732	Aspnet_compiler.exe
4432	powershell.exe
4432	powershell.exe
4432	powershell.exe
3744	Aspnet_compiler.exe
3744	Aspnet_compiler.exe
4432	powershell.exe
3620	Aspnet_compiler.exe
3620	Aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2800	Aspnet_compiler.exe
3808	wscript.exe
3808	wscript.exe
1556	msdt.exe
1556	msdt.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4432	powershell.exe
Token: SeDebugPrivilege	3936	taskkill.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3808 wrote to memory of 4432	3808	wscript.exe	80
PID 4432 wrote to memory of 2800	4432	powershell.exe	82
PID 4432 wrote to memory of 2800	4432	powershell.exe	82
PID 4432 wrote to memory of 2800	4432	powershell.exe	82
PID 3808 wrote to memory of 1556	3808	wscript.exe	83
PID 4432 wrote to memory of 1524	4432	powershell.exe	84
PID 4432 wrote to memory of 1524	4432	powershell.exe	84
PID 4432 wrote to memory of 1524	4432	powershell.exe	84
PID 4432 wrote to memory of 2780	4432	powershell.exe	85
PID 4432 wrote to memory of 2780	4432	powershell.exe	85
PID 4432 wrote to memory of 2780	4432	powershell.exe	85
PID 4432 wrote to memory of 4424	4432	powershell.exe	86
PID 4432 wrote to memory of 1008	4432	powershell.exe	87
PID 4432 wrote to memory of 1008	4432	powershell.exe	87
PID 4432 wrote to memory of 1008	4432	powershell.exe	87
PID 4432 wrote to memory of 564	4432	powershell.exe	88
PID 4432 wrote to memory of 564	4432	powershell.exe	88
PID 4432 wrote to memory of 564	4432	powershell.exe	88
PID 4432 wrote to memory of 4732	4432	powershell.exe	89
PID 4432 wrote to memory of 4732	4432	powershell.exe	89
PID 4432 wrote to memory of 4732	4432	powershell.exe	89
PID 4432 wrote to memory of 1828	4432	powershell.exe	90
PID 4432 wrote to memory of 3744	4432	powershell.exe	91
PID 4432 wrote to memory of 3744	4432	powershell.exe	91
PID 4432 wrote to memory of 3744	4432	powershell.exe	91
PID 4432 wrote to memory of 3620	4432	powershell.exe	92
PID 4432 wrote to memory of 3620	4432	powershell.exe	92
PID 4432 wrote to memory of 3620	4432	powershell.exe	92
PID 3808 wrote to memory of 1504	3808	wscript.exe	94
PID 1504 wrote to memory of 3936	1504	cmd.exe	96

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmpukiimhn6.js
1⤵
- Badlisted process makes network request
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3808
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -NonInteractive -NoLogo -File "C:\Temp\ps_mrDqK5ToGlNO_1779497752856.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4432
- - 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:2800
- - 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:1524
- - 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:2780
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    PID:4424
- - 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:1008
- - 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:564
- - 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:4732
- - 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⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3744
- - 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:3620
- C:\Windows\SysWOW64\msdt.exe
  "C:\Windows\SysWOW64\msdt.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:1556
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /f /im wscript.exe >nul 2>&1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1504
- - C:\Windows\system32\taskkill.exe
    taskkill /f /im wscript.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3936

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_mrDqK5ToGlNO_1779497752856.ps1

Path C:\Temp\ps_mrDqK5ToGlNO_1779497752856.ps1
Size 1.4MB
SHA256 6179285647f23e1e22766963321403db510872984e23c20b2cd9cbe246829dc0
MD5 f35e38c7caaac92e2e7f649848cca514
SHA1 70ffe22801a34e376c2e70534a55d54a6ea1e625
SHA512 11b3f3201bc00206c25f627a6dac766d2500c4d872b6f7eba106026b614feb2760680c222c20babf97b118033cae6c911e7837e80d14f93bb38a3ecba4a74fec
SSDEEP 24576:IksVkLyufMboBzY9FzxQz2LD2ZYvawf3S+3dVbCEP6o2zO1mq7r:rcUCOcNVr
TLSH
T11B65AECAB2F2B779A92816311C91A54CBBC24F32D776283B78054F432716C962DE6FD4
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_v3hdoklh.s5p.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_v3hdoklh.s5p.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/1556-21-0x0000000000800000-0x0000000000843000-memory.dmp

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memory/1556-24-0x0000000000800000-0x0000000000843000-memory.dmp

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memory/2800-17-0x0000000001070000-0x00000000013C6000-memory.dmp

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memory/2800-13-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2800-16-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2800-23-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2800-18-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/3808-20-0x0000000000AB0000-0x0000000003094000-memory.dmp

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memory/3808-34-0x000001CA8C6F0000-0x000001CA8C7FB000-memory.dmp

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memory/3808-27-0x000001CA8C6F0000-0x000001CA8C7FB000-memory.dmp

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memory/3808-26-0x0000000000AB0000-0x0000000003094000-memory.dmp

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memory/4432-19-0x0000028EEE3B0000-0x0000028EEE3C0000-memory.dmp

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memory/4432-1-0x0000028EEE3B0000-0x0000028EEE3C0000-memory.dmp

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memory/4432-2-0x0000028EEE3B0000-0x0000028EEE3C0000-memory.dmp

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memory/4432-8-0x0000028EEE330000-0x0000028EEE352000-memory.dmp

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memory/4432-10-0x0000028EEE3B0000-0x0000028EEE3C0000-memory.dmp

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memory/4432-14-0x0000028EEE3B0000-0x0000028EEE3C0000-memory.dmp

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memory/4432-15-0x0000028EEE3B0000-0x0000028EEE3C0000-memory.dmp

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memory/4432-12-0x0000028EF10D0000-0x0000028EF10EA000-memory.dmp

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