formbook | 8c65d9805836b194f2b34cde260a0a0d52de3d73e1e0ce775e69e7179e9b5019

Analysis

max time kernel
39s
max time network
40s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
08/09/2026, 15:46

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General

Target
8c65d9805836b194f2b34cde260a0a0d52de3d73e1e0ce775e69e7179e9b5019.exe
Size 278KB
Sample260908-s714datejf
SHA256 8c65d9805836b194f2b34cde260a0a0d52de3d73e1e0ce775e69e7179e9b5019
MD5 5affc9981e6eb090fa8fbbe3ebfc0b92
SHA1 a0ea955c9cc127d50eef5b832a08be819c811ec5
SHA512 14e897f0cf7301467dd64ab09b40558c0689aab5574d4b00df1b3bdda076eed560c1566988ab90dbd99e864508ed0553ec91f3ccad183ec1450ee81418902b06
SSDEEP 6144:gCIuutXnDuFJItKLmk61EFGQ7PpYa6o0XsJL4HOEtjK45XbT+kcYF:FSVA+IKkjXp6sJKBbba
TLSH
T18454231B070AC25FE8F164B33ECF42E39769663918E67087579169F8C7895FCAC69203
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery 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 2 IoCs

rat

resource	yara_rule
behavioral1/memory/840-0-0x00000000008D0000-0x0000000000916000-memory.dmp	family_formbook
behavioral1/memory/840-2-0x00000000008D0000-0x0000000000916000-memory.dmp	family_formbook

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1028	840	WerFault.exe	86

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	8c65d9805836b194f2b34cde260a0a0d52de3d73e1e0ce775e69e7179e9b5019.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
840	8c65d9805836b194f2b34cde260a0a0d52de3d73e1e0ce775e69e7179e9b5019.exe

C:\Users\Admin\AppData\Local\Temp\8c65d9805836b194f2b34cde260a0a0d52de3d73e1e0ce775e69e7179e9b5019.exe
"C:\Users\Admin\AppData\Local\Temp\8c65d9805836b194f2b34cde260a0a0d52de3d73e1e0ce775e69e7179e9b5019.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 840 -s 220
  2⤵
  - Program crash
  PID:1028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 840 -ip 840
1⤵
PID:1916

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

memory/840-0-0x00000000008D0000-0x0000000000916000-memory.dmp

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memory/840-1-0x0000000000F50000-0x000000000129A000-memory.dmp

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memory/840-2-0x00000000008D0000-0x0000000000916000-memory.dmp

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