formbook | b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6

Analysis

max time kernel
148s
max time network
115s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/08/2026, 15:16

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General

Target
b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
Size 991KB
Sample260810-snsmwsbr51
SHA256 b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6
MD5 6cb9744b1f3583cd6a68e2a6bcd2f76d
SHA1 047e9b6eabf6151127474b96d1e7616247025bf0
SHA512 14748195066ef9c7a6b5c88970a0c4b498012c71b84afad23f97d61417923ce031074442a55be557e61af64379d6d54cedde467e6d9e1816ca27a3dca63b7b97
SSDEEP 12288:iHFM19w+pGFSBp9DpoBYBZLG6Sue0WXN8tFBWPFb2iPZUTNR0jnAQLskfxwwLCms:iHFK9xpHBp9DpoBWC6SWGENIAQ7HLz
TLSH
T1CC2523AC76B58A13E9A96BFC46F0E53557723E8F9330D20E4ECA6CEB7461B008914713
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution formbook persistence 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 1 IoCs

rat

resource	yara_rule
behavioral2/memory/3076-13-0x0000000000F10000-0x0000000000F56000-memory.dmp	family_formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3620	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
4936	CtFBDyZDQu.exe
252	CtFBDyZDQu.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3611646547-550105268-947503007-1000\Software\Microsoft\Windows\CurrentVersion\Run\CtFBDyZDQu = "\"C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\powershell.exe\" -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -File \"C:\\Users\\Admin\\AppData\\Local\\Temp\\kgooh2tmtli.ps1\""	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5744 set thread context of 3076	5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe	91
PID 4936 set thread context of 252	4936	CtFBDyZDQu.exe	99

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1188	3076	WerFault.exe	91

System Location Discovery: System Language Discovery 1 TTPs 2 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	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CtFBDyZDQu.exe

Suspicious behavior: EnumeratesProcesses 18 IoCs

pid	Process
5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
3076	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
3620	powershell.exe
3620	powershell.exe
4936	CtFBDyZDQu.exe
4936	CtFBDyZDQu.exe
252	CtFBDyZDQu.exe
252	CtFBDyZDQu.exe
252	CtFBDyZDQu.exe
252	CtFBDyZDQu.exe
252	CtFBDyZDQu.exe
252	CtFBDyZDQu.exe
252	CtFBDyZDQu.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
Token: SeDebugPrivilege	3620	powershell.exe
Token: SeDebugPrivilege	4936	CtFBDyZDQu.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 5744 wrote to memory of 4944	5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe	89
PID 5744 wrote to memory of 5272	5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe	90
PID 5744 wrote to memory of 3076	5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe	91
PID 5744 wrote to memory of 3076	5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe	91
PID 5744 wrote to memory of 3076	5744	b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe	91
PID 3620 wrote to memory of 4936	3620	powershell.exe	97
PID 4936 wrote to memory of 252	4936	CtFBDyZDQu.exe	99
PID 4936 wrote to memory of 252	4936	CtFBDyZDQu.exe	99
PID 4936 wrote to memory of 252	4936	CtFBDyZDQu.exe	99

C:\Users\Admin\AppData\Local\Temp\b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
"C:\Users\Admin\AppData\Local\Temp\b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5744
- C:\Users\Admin\AppData\Local\Temp\b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
  "C:\Users\Admin\AppData\Local\Temp\b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe"
  2⤵
  PID:4944
- C:\Users\Admin\AppData\Local\Temp\b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
  "C:\Users\Admin\AppData\Local\Temp\b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe"
  2⤵
  PID:5272
- C:\Users\Admin\AppData\Local\Temp\b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe
  "C:\Users\Admin\AppData\Local\Temp\b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3076
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3076 -s 228
    3⤵
    - Program crash
    PID:1188

C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -File "C:\Users\Admin\AppData\Local\Temp\kgooh2tmtli.ps1"
1⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3620
- C:\Users\Admin\AppData\Roaming\CtFBDyZDQu.exe
  "C:\Users\Admin\AppData\Roaming\CtFBDyZDQu.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4936
- - C:\Users\Admin\AppData\Roaming\CtFBDyZDQu.exe
    "C:\Users\Admin\AppData\Roaming\CtFBDyZDQu.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:252

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3076 -ip 3076
1⤵
PID:3220

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

kgooh2tmtli.ps1

Path C:\Users\Admin\AppData\Local\Temp\kgooh2tmtli.ps1
Size 1KB
SHA256 6a9a8f951a55548884fa2a9f8bbac5749fa50e621ec350e1f4a7a1ca8c04888e
MD5 0e0bda6b362d797871712a561ea54b8b
SHA1 db5925cb981643289adc9d98e1bcdf205abe4fec
SHA512 7d87923a7696af9d9db8c1f9f6808e32607e73be5a28af40097791dcaa15d308c4f2f60b1bf8de23726beb589cc548fe1a68188ee7f1c332da6ef4b9c4c72986
TLSH
T14321DD4BCE5407D6402807F0160335CE752D61CB6BAF0190A9EDB8EEB32BD62346ECE0
MD5 SHA1 SHA512 TLSH

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CtFBDyZDQu.exe

Path C:\Users\Admin\AppData\Roaming\CtFBDyZDQu.exe
Size 991KB
SHA256 b2346b21db6c58f44a5da13d29d923b939cf01ecc0ea7b0f786c739d8285cfd6
MD5 6cb9744b1f3583cd6a68e2a6bcd2f76d
SHA1 047e9b6eabf6151127474b96d1e7616247025bf0
SHA512 14748195066ef9c7a6b5c88970a0c4b498012c71b84afad23f97d61417923ce031074442a55be557e61af64379d6d54cedde467e6d9e1816ca27a3dca63b7b97
SSDEEP 12288:iHFM19w+pGFSBp9DpoBYBZLG6Sue0WXN8tFBWPFb2iPZUTNR0jnAQLskfxwwLCms:iHFK9xpHBp9DpoBWC6SWGENIAQ7HLz
TLSH
T1CC2523AC76B58A13E9A96BFC46F0E53557723E8F9330D20E4ECA6CEB7461B008914713
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3076-12-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/3076-15-0x00000000014F0000-0x0000000001864000-memory.dmp

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memory/3076-13-0x0000000000F10000-0x0000000000F56000-memory.dmp

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memory/3620-21-0x00007FFE1C860000-0x00007FFE1D204000-memory.dmp

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memory/3620-24-0x00007FFE1C860000-0x00007FFE1D204000-memory.dmp

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memory/3620-30-0x00007FFE1C860000-0x00007FFE1D204000-memory.dmp

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memory/3620-29-0x00007FFE1C860000-0x00007FFE1D204000-memory.dmp

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memory/3620-26-0x00007FFE1C860000-0x00007FFE1D204000-memory.dmp

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memory/3620-25-0x00007FFE1C860000-0x00007FFE1D204000-memory.dmp

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memory/3620-23-0x00007FFE1C860000-0x00007FFE1D204000-memory.dmp

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memory/3620-20-0x0000024534300000-0x0000024534322000-memory.dmp

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memory/3620-19-0x00007FFE1C860000-0x00007FFE1D204000-memory.dmp

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memory/3620-16-0x00007FFE1C9EF000-0x00007FFE1C9F0000-memory.dmp

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memory/5744-3-0x0000000005280000-0x0000000005312000-memory.dmp

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memory/5744-14-0x0000000074420000-0x0000000074BDC000-memory.dmp

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memory/5744-5-0x0000000074420000-0x0000000074BDC000-memory.dmp

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memory/5744-0-0x0000000074432000-0x0000000074433000-memory.dmp

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memory/5744-4-0x0000000005200000-0x000000000520A000-memory.dmp

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memory/5744-2-0x00000000057A0000-0x0000000005D5A000-memory.dmp

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memory/5744-6-0x00000000053B0000-0x00000000053BC000-memory.dmp

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memory/5744-10-0x0000000007AE0000-0x0000000007BCA000-memory.dmp

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memory/5744-9-0x0000000007A40000-0x0000000007ADC000-memory.dmp

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memory/5744-1-0x0000000000720000-0x000000000081E000-memory.dmp

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memory/5744-8-0x0000000074420000-0x0000000074BDC000-memory.dmp

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memory/5744-7-0x0000000074432000-0x0000000074433000-memory.dmp

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