formbook | 890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
10/08/2026, 13:59

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General

Target
890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
Size 1.1MB
Sample260810-ramdaaap3w
SHA256 890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23
MD5 a50e74d44e5206f6b7e554013fb2cae1
SHA1 351510977c0da401f59f616070919c37f8167d0d
SHA512 715a1a16b42a8c1cd9da4941f37be87ae8c2f4c25d0b5b787e219388f8ec77d7ac7dbb38aad9adcd7b75f913162be7855804d3b4e97d792330f53a3bc53876a0
SSDEEP 24576:cKlCvg+Phf4oqOpp4/MWrkeZ8sF4cvBmAsf0PvTg2gdmNvTdMr:cKlCvg+Phf4rOpp4/MzcNF4cvTPs2gdz
TLSH
T1BB3512942F4EC801C4A25735CEA1E3F912B62D9EE532C6038EEDBDE739762075C25B52
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/3300-10-0x00000000015D0000-0x0000000001616000-memory.dmp	family_formbook
behavioral1/memory/3300-12-0x00000000015D0000-0x0000000001616000-memory.dmp	family_formbook

SmartAssembly .NET packer 1 IoCs

Detects SmartAssembly .NET packer.

resource	yara_rule
behavioral1/memory/1288-5-0x0000000005D20000-0x0000000005D36000-memory.dmp	SmartAssembly

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1288 set thread context of 3300	1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe	89

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2148	3300	WerFault.exe	89

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	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
3300	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 4840	1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe	87
PID 1288 wrote to memory of 2052	1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe	88
PID 1288 wrote to memory of 3300	1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe	89
PID 1288 wrote to memory of 3300	1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe	89
PID 1288 wrote to memory of 3300	1288	890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe	89

C:\Users\Admin\AppData\Local\Temp\890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
"C:\Users\Admin\AppData\Local\Temp\890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1288
- C:\Users\Admin\AppData\Local\Temp\890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
  "C:\Users\Admin\AppData\Local\Temp\890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe"
  2⤵
  PID:4840
- C:\Users\Admin\AppData\Local\Temp\890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
  "C:\Users\Admin\AppData\Local\Temp\890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe"
  2⤵
  PID:2052
- C:\Users\Admin\AppData\Local\Temp\890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe
  "C:\Users\Admin\AppData\Local\Temp\890499482db9f8777c7fb183fa4d72db6d1b6f4fe0326ae851a5e659d6d99a23.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3300
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3300 -s 184
    3⤵
    - Program crash
    PID:2148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3300 -ip 3300
1⤵
PID:4804

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/1288-0-0x0000000000F50000-0x0000000001064000-memory.dmp

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memory/1288-1-0x0000000005E00000-0x00000000063A4000-memory.dmp

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memory/1288-2-0x0000000005900000-0x0000000005992000-memory.dmp

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memory/1288-3-0x0000000005AC0000-0x0000000005AD0000-memory.dmp

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memory/1288-4-0x00000000059C0000-0x00000000059CA000-memory.dmp

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memory/1288-5-0x0000000005D20000-0x0000000005D36000-memory.dmp

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memory/1288-6-0x00000000063B0000-0x0000000006494000-memory.dmp

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memory/1288-7-0x0000000006550000-0x00000000065EC000-memory.dmp

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memory/3300-8-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/3300-10-0x00000000015D0000-0x0000000001616000-memory.dmp

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memory/3300-11-0x0000000001B30000-0x0000000001E7A000-memory.dmp

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memory/3300-12-0x00000000015D0000-0x0000000001616000-memory.dmp

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