formbook | 4465c322692f63b3ec6b5941be87017f1643e21e41df0b63afc618f5f8136208

Analysis

max time kernel
149s
max time network
134s
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, 12:37

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General

Target

bin-crypted-crypted.exe
Size

2.4MB
MD5

ba011d330e84715b66989217075d100a
SHA1

9d56d3200232358ed6eeee2da3a19f829f9143be
SHA256

4465c322692f63b3ec6b5941be87017f1643e21e41df0b63afc618f5f8136208
SHA512

409acb2dc4a5d9aae7119d6882ebd851c925d0b8ae8dac941e371138804a31a08609d8013f08f249fff43750b78aa4d73118b2d23ba2d1e0dd390dc15865ce3e
SSDEEP

49152:5u5voq9yqVHncEylouiXCvkHDHewwtiw6ZA:5u5vPVHnfyNiXCvKDHe5tD6W

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 3 IoCs

description	pid	Process	procid_target
PID 5984 set thread context of 4176	5984	bin-crypted-crypted.exe	87
PID 4176 set thread context of 3388	4176	RegAsm.exe	56
PID 3648 set thread context of 3388	3648	raserver.exe	56

System Location Discovery: System Language Discovery 1 TTPs 4 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-crypted.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	raserver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

pid	Process
4176	RegAsm.exe
4176	RegAsm.exe
4176	RegAsm.exe
4176	RegAsm.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe
3648	raserver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3388	Explorer.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4176	RegAsm.exe
4176	RegAsm.exe
4176	RegAsm.exe
3648	raserver.exe
3648	raserver.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4176	RegAsm.exe
Token: SeDebugPrivilege	3648	raserver.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5984 wrote to memory of 4176	5984	bin-crypted-crypted.exe	87
PID 5984 wrote to memory of 4176	5984	bin-crypted-crypted.exe	87
PID 5984 wrote to memory of 4176	5984	bin-crypted-crypted.exe	87
PID 5984 wrote to memory of 4176	5984	bin-crypted-crypted.exe	87
PID 5984 wrote to memory of 4176	5984	bin-crypted-crypted.exe	87
PID 5984 wrote to memory of 4176	5984	bin-crypted-crypted.exe	87
PID 3388 wrote to memory of 3648	3388	Explorer.EXE	90
PID 3388 wrote to memory of 3648	3388	Explorer.EXE	90
PID 3388 wrote to memory of 3648	3388	Explorer.EXE	90
PID 3648 wrote to memory of 4596	3648	raserver.exe	94
PID 3648 wrote to memory of 4596	3648	raserver.exe	94
PID 3648 wrote to memory of 4596	3648	raserver.exe	94

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3388
- C:\Users\Admin\AppData\Local\Temp\bin-crypted-crypted.exe
  "C:\Users\Admin\AppData\Local\Temp\bin-crypted-crypted.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5984
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:4176
- C:\Windows\SysWOW64\raserver.exe
  "C:\Windows\SysWOW64\raserver.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:3648
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4596

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/3388-7-0x0000000008590000-0x000000000865F000-memory.dmp

Filesize
828KB

Download
memory/3388-16-0x00000000086E0000-0x0000000008809000-memory.dmp

Filesize
1.2MB

Download
memory/3388-15-0x00000000086E0000-0x0000000008809000-memory.dmp

Filesize
1.2MB

Download
memory/3388-13-0x00000000086E0000-0x0000000008809000-memory.dmp

Filesize
1.2MB

Download
memory/3388-12-0x0000000008590000-0x000000000865F000-memory.dmp

Filesize
828KB

Download
memory/3648-8-0x00000000006C0000-0x00000000006DF000-memory.dmp

Filesize
124KB

Download
memory/3648-10-0x00000000006C0000-0x00000000006DF000-memory.dmp

Filesize
124KB

Download
memory/3648-11-0x0000000000B10000-0x0000000000B3F000-memory.dmp

Filesize
188KB

Download
memory/4176-0-0x0000000000D00000-0x0000000000D2F000-memory.dmp

Filesize
188KB

Download
memory/4176-5-0x0000000000D00000-0x0000000000D2F000-memory.dmp

Filesize
188KB

Download
memory/4176-6-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/4176-4-0x0000000002B40000-0x0000000002E8A000-memory.dmp

Filesize
3.3MB

Download
memory/5984-3-0x00000000009C0000-0x0000000000C2D000-memory.dmp

Filesize
2.4MB

Download