formbook | 543488926596ff1e2874b039ecfcbdbca619e49598111df0e7531c469de68cfe

Analysis

max time kernel
102s
max time network
104s
platform
windows11-21h2_x64
resource
win11-20250619-en
resource tags

arch:x64arch:x86image:win11-20250619-enlocale:en-usos:windows11-21h2-x64system
submitted
09/07/2025, 11:11

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General

Target
PROTEST LETTER.exe
Size 1.2MB
Sample250709-nadvcsxvdx
SHA256 543488926596ff1e2874b039ecfcbdbca619e49598111df0e7531c469de68cfe
MD5 c4bd09c4c5db94450785bc5ac91b26b3
SHA1 b316aba50a83d55a40570ae700ea49948d5f04a6
SHA512 15666da7229749d331c67e1eb576776d08a5d62c0f2987309c4e9d18814059d1407ce9503876aa3381734c7c8dce55153f02d268076412f2b397ad815e17bbb5
SSDEEP 24576:ntb20pkaCqT5TBWgNQ7aw4cqkkOGLTcWM08+H86A:kVg5tQ7aw3LknT40895
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

formbook discovery rat spyware stealer trojan

Malware Config

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Formbook family
formbook

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/240-17-0x0000000000400000-0x0000000000447000-memory.dmp	family_formbook
behavioral2/memory/240-18-0x0000000000400000-0x0000000000447000-memory.dmp	family_formbook

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2916 set thread context of 240	2916	PROTEST LETTER.exe	78

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1692	2916	WerFault.exe	77

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	PROTEST LETTER.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe
240	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2916	PROTEST LETTER.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 240	2916	PROTEST LETTER.exe	78
PID 2916 wrote to memory of 240	2916	PROTEST LETTER.exe	78
PID 2916 wrote to memory of 240	2916	PROTEST LETTER.exe	78
PID 2916 wrote to memory of 240	2916	PROTEST LETTER.exe	78

C:\Users\Admin\AppData\Local\Temp\PROTEST LETTER.exe
"C:\Users\Admin\AppData\Local\Temp\PROTEST LETTER.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\PROTEST LETTER.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:240
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2916 -s 708
  2⤵
  - Program crash
  PID:1692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2916 -ip 2916
1⤵
PID:2796

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

autA23C.tmp

Path C:\Users\Admin\AppData\Local\Temp\autA23C.tmp
Size 281KB
SHA256 d57238089338fe5990878c9b6c2b5d4c1fb6d2879ea5b76118492a0739cbcb9d
MD5 0086daea50eb956f340bd09421499a53
SHA1 a5517d59ef05f530242d41ff9b94a2013168024c
SHA512 35df7b2f4095a99fc1128580e43437024d82f5a87cb4abfb424a07ccd84c380f30fad9992f2037324af466ee9612c3f8c5c4c2c8b3d3be0446ae1b6ab6f45950
SSDEEP 6144:yargAUU8gK3niBBUQJtXKy733cT3X6VvtWrcx5vlr:y1UzioUc1ncLqvvlr
MD5 SHA1 SHA512 SSDEEP

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memory/240-15-0x0000000000400000-0x0000000000447000-memory.dmp

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memory/240-16-0x0000000001600000-0x0000000001956000-memory.dmp

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memory/240-17-0x0000000000400000-0x0000000000447000-memory.dmp

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memory/240-18-0x0000000000400000-0x0000000000447000-memory.dmp

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memory/2916-14-0x00000000014E0000-0x00000000018E0000-memory.dmp

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