formbook | 8fa0440884a90d217c683a8a50207068022db140a171049957afbe463d090fd4

Analysis

max time kernel
148s
max time network
141s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-12-2024 00:26

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

38f284c6ac68831d066f9325b4f8508145ef62146b4c257e3c0a10fdf2305b0a.rtf
Size

3.7MB
MD5

fd00d713c843371c82be116049b5a6d9
SHA1

e46e115e003d6088655a5c364d6d03551cb0e41b
SHA256

38f284c6ac68831d066f9325b4f8508145ef62146b4c257e3c0a10fdf2305b0a
SHA512

3f5c7ff62a3f3e7d03c7dd69a3195a93ad0490864ffa10af155085755a1de89f9b27a92e67c84594923b87348b5f192714f33467abbd072ee9a9050b2442c07f
SSDEEP

24576:/gzlt/Kh+sR8/P5fe4VOGLCaIMArRmXCYtXI9yrti7FnVP33hzkZsN:z

Score

10^/10

formbook u31y discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

u31y

Decoy

writer-career.com

thecozymosey.com

cesarashop.com

tcdfzx.com

redknightsaus6.com

hbczz.com

u0959.com

hyyssy.com

ytbangsi.com

popularepoch.com

jenesgloparties.site

belbo-shop.com

fundeim-ucv.com

buttersdesignco.com

ingiluzim.xyz

visithimalayatours.com

aridahaaf.xyz

emocjilindre.xyz

rcfunhobby.com

taminndir.com

Signatures

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

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2716 created 1060	2716	Client.exe	31

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral1/memory/2760-10-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2728-19-0x0000000000090000-0x00000000000BF000-memory.dmp	formbook

Executes dropped EXE 1 IoCs

pid	Process
2716	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
1060	CmD.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 2760	2716	Client.exe	35
PID 2760 set thread context of 1200	2760	notepad.exe	21
PID 2728 set thread context of 1200	2728	msiexec.exe	21

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

System Location Discovery: System Language Discovery 1 TTPs 6 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	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CmD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Client.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Office loads VBA resources, possible macro or embedded object present

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2552	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1972	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 34 IoCs

pid	Process
2716	Client.exe
2716	Client.exe
2716	Client.exe
2760	notepad.exe
2760	notepad.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe
2728	msiexec.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2760	notepad.exe
2760	notepad.exe
2760	notepad.exe
2728	msiexec.exe
2728	msiexec.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2716	Client.exe
Token: SeDebugPrivilege	2760	notepad.exe
Token: SeDebugPrivilege	2728	msiexec.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1972	WINWORD.EXE
1972	WINWORD.EXE

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 1060	2552	EQNEDT32.EXE	31
PID 2552 wrote to memory of 1060	2552	EQNEDT32.EXE	31
PID 2552 wrote to memory of 1060	2552	EQNEDT32.EXE	31
PID 2552 wrote to memory of 1060	2552	EQNEDT32.EXE	31
PID 1060 wrote to memory of 2716	1060	CmD.exe	34
PID 1060 wrote to memory of 2716	1060	CmD.exe	34
PID 1060 wrote to memory of 2716	1060	CmD.exe	34
PID 1060 wrote to memory of 2716	1060	CmD.exe	34
PID 2716 wrote to memory of 2760	2716	Client.exe	35
PID 2716 wrote to memory of 2760	2716	Client.exe	35
PID 2716 wrote to memory of 2760	2716	Client.exe	35
PID 2716 wrote to memory of 2760	2716	Client.exe	35
PID 2716 wrote to memory of 2760	2716	Client.exe	35
PID 2716 wrote to memory of 2760	2716	Client.exe	35
PID 2716 wrote to memory of 2760	2716	Client.exe	35
PID 1200 wrote to memory of 2728	1200	Explorer.EXE	36
PID 1200 wrote to memory of 2728	1200	Explorer.EXE	36
PID 1200 wrote to memory of 2728	1200	Explorer.EXE	36
PID 1200 wrote to memory of 2728	1200	Explorer.EXE	36
PID 1200 wrote to memory of 2728	1200	Explorer.EXE	36
PID 1200 wrote to memory of 2728	1200	Explorer.EXE	36
PID 1200 wrote to memory of 2728	1200	Explorer.EXE	36
PID 2728 wrote to memory of 2748	2728	msiexec.exe	37
PID 2728 wrote to memory of 2748	2728	msiexec.exe	37
PID 2728 wrote to memory of 2748	2728	msiexec.exe	37
PID 2728 wrote to memory of 2748	2728	msiexec.exe	37
PID 1972 wrote to memory of 2628	1972	WINWORD.EXE	39
PID 1972 wrote to memory of 2628	1972	WINWORD.EXE	39
PID 1972 wrote to memory of 2628	1972	WINWORD.EXE	39
PID 1972 wrote to memory of 2628	1972	WINWORD.EXE	39

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
  "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\38f284c6ac68831d066f9325b4f8508145ef62146b4c257e3c0a10fdf2305b0a.rtf"
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Windows\splwow64.exe
    C:\Windows\splwow64.exe 12288
    3⤵
    PID:2628
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Windows\SysWOW64\msiexec.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:2728
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\notepad.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2748

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Windows\SysWOW64\CmD.exe
  CmD.exe /C %tmp%\Client.exe AC
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1060
- - C:\Users\Admin\AppData\Local\Temp\Client.exe
    C:\Users\Admin\AppData\Local\Temp\Client.exe AC
    3⤵
    - Suspicious use of NtCreateUserProcessOtherParentProcess
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2716
- - C:\Windows\SysWOW64\notepad.exe
    C:\Windows\SysWOW64\notepad.exe /Processid:{2B126FBB-B85A-4536-BD0B-9FC91BFCCA9D}
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Exploitation for Client Execution

T1203

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Client.exe

Filesize
916KB

MD5
0d88f6e6248bc4f9a5865eb968d93670

SHA1
24f8be0a2d6eff1e119333d7b55d159cd89bfc90

SHA256
a27283e26cbacea227b535b1a18a4d3cb9f39ef012c97c35e98c04a4cb9ca61a

SHA512
57fd190d0505a9807683fe7452814d009a168dd0fd983e5dd52a1826f37e3b40ee3f2c7f74c61a3072c6f4d64ce35bd212fccb52086fed8a4e7d6baae24e2020

Download Submit
memory/1200-25-0x0000000004090000-0x0000000004146000-memory.dmp

Filesize
728KB

Download
memory/1972-0-0x000000002F221000-0x000000002F222000-memory.dmp

Filesize
4KB

Download
memory/1972-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1972-2-0x00000000712ED000-0x00000000712F8000-memory.dmp

Filesize
44KB

Download
memory/1972-20-0x00000000712ED000-0x00000000712F8000-memory.dmp

Filesize
44KB

Download
memory/2716-9-0x0000000000B10000-0x0000000000BFE000-memory.dmp

Filesize
952KB

Download
memory/2728-16-0x0000000000150000-0x0000000000164000-memory.dmp

Filesize
80KB

Download
memory/2728-18-0x0000000000150000-0x0000000000164000-memory.dmp

Filesize
80KB

Download
memory/2728-19-0x0000000000090000-0x00000000000BF000-memory.dmp

Filesize
188KB

Download
memory/2760-10-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download