formbook | 4b86b60d5c3edb57a0007d881b77b527606a771264ffffff50d2787da1ba22a7

Analysis

max time kernel
149s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2025, 14:17

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General

Target

bin-crypted.exe
Size

349KB
MD5

8d9ce3796ab75494d8506e1317ad0edf
SHA1

601541fd266a7894d9f40b923a312ea5fe1bbeec
SHA256

20e06558da9221d09648c2a64bd93b8bfa9d7d67ab9bc0c16d7d4035f1b8b454
SHA512

2fadd09017c7e2536e174a78b21d14ab901e203dcc9f5a0db0c164e3f364e51c431b5238749d56bcbee6ad12c644cd4fb29d08fefdf89d829f71e94a2df8c3a0
SSDEEP

3072:WQnciRMiqBIBub5iaeijvOwQF/MhZeqnOe103huHXJ+9ihSSHYgIPQjy1xYq:eBIMbo4iF/MXe2103hu09ihSU0wG

Score

10^/10

formbook jc27 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

jc27

Decoy

uymygel.xyz

aregiver-services-test01.sbs

ouyin67gh.vip

lobalz.top

cl1ic4.pro

mconotc.top

hmm365.cfd

olonam.shop

ionnel.shop

ntroductorypage.info

einopumpify.net

hsnac.xyz

rameny.net

itness-apps1-s2025.sbs

nshulthakurdev.pro

iveawaywin.online

setobe.info

ostury.shop

5r03a.sbs

yota-blog.net

Signatures

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4972 set thread context of 3220	4972	bin-crypted.exe	55
PID 4988 set thread context of 3220	4988	msdt.exe	55

System Location Discovery: System Language Discovery 1 TTPs 3 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	bin-crypted.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

pid	Process
4972	bin-crypted.exe
4972	bin-crypted.exe
4972	bin-crypted.exe
4972	bin-crypted.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe
4988	msdt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3220	Explorer.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4972	bin-crypted.exe
4972	bin-crypted.exe
4972	bin-crypted.exe
4988	msdt.exe
4988	msdt.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4972	bin-crypted.exe
Token: SeDebugPrivilege	4988	msdt.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3220	Explorer.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3220 wrote to memory of 4988	3220	Explorer.EXE	87
PID 3220 wrote to memory of 4988	3220	Explorer.EXE	87
PID 3220 wrote to memory of 4988	3220	Explorer.EXE	87
PID 4988 wrote to memory of 4572	4988	msdt.exe	90
PID 4988 wrote to memory of 4572	4988	msdt.exe	90
PID 4988 wrote to memory of 4572	4988	msdt.exe	90

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3220
- C:\Users\Admin\AppData\Local\Temp\bin-crypted.exe
  "C:\Users\Admin\AppData\Local\Temp\bin-crypted.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  PID:4972
- 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
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4988
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\bin-crypted.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4572

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

Replay Monitor

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Downloads

memory/3220-3-0x00000000084D0000-0x000000000867D000-memory.dmp

Filesize
1.7MB

Download
memory/3220-7-0x00000000084D0000-0x000000000867D000-memory.dmp

Filesize
1.7MB

Download
memory/3220-8-0x0000000006F50000-0x0000000007000000-memory.dmp

Filesize
704KB

Download
memory/3220-10-0x0000000006F50000-0x0000000007000000-memory.dmp

Filesize
704KB

Download
memory/3220-11-0x0000000006F50000-0x0000000007000000-memory.dmp

Filesize
704KB

Download
memory/4972-0-0x0000000000E10000-0x000000000115A000-memory.dmp

Filesize
3.3MB

Download
memory/4972-2-0x0000000000A60000-0x0000000000AB8000-memory.dmp

Filesize
352KB

Download
memory/4972-1-0x0000000000A7F000-0x0000000000A80000-memory.dmp

Filesize
4KB

Download
memory/4988-4-0x00000000006D0000-0x0000000000727000-memory.dmp

Filesize
348KB

Download
memory/4988-5-0x00000000006D0000-0x0000000000727000-memory.dmp

Filesize
348KB

Download
memory/4988-6-0x0000000000470000-0x000000000049F000-memory.dmp

Filesize
188KB

Download