formbook | 438b4a7fd44c48ebaa0ef1e7368b7d344de8040ed247e77b5c84ebe0c2592629

General

Target

image_00yu.exe
Size

684KB
MD5

5b671e65052b9fe3672bf5671193a415
SHA1

42e2cbed170357699d64541d458ee4bab1c9e04d
SHA256

8b4af4f4e4ff7945788cfd890de28517157ebbd54b28561b02eaa4774a8c6573
SHA512

008225e7dcb3a9241c465a7f356c003758004392b3fc5aa777151ccd34c4fd602bad6f839416af9bb0960a2d08588c6b80ac375499b07c1f05229a256a758f14
SSDEEP

12288:v2xu/Zx7GpuKjGAes2CEo1xBPuE8/ygGt6pQeI9usAtZGobkkN++KQ/YRjIkR:eQ/7I3xeuEQLcyrQ99tAxkN45Nf

Score

10^/10

formbook rn10 discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

rn10

Decoy

kedai168et.com

mental-olympics.com

pussybuildsstrongbones.net

857691.shop

hisellers.net

exposurecophotography.com

beaded-boutique.net

wednesdayholdings.com

plesacv.xyz

manonlineros.com

a0204.shop

333689g.com

dyprl716h.xyz

pulseirabet.com

fnet.work

bo-2024-001-v1-d1.xyz

ongaurdsecurity.com

giulianacristini.com

miladamani.com

magicalrealmshopkeeper.online

Signatures

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

Formbook payload 4 IoCs

rat

resource	yara_rule
behavioral1/memory/2720-17-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2720-21-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2720-28-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2608-31-0x00000000000B0000-0x00000000000DF000-memory.dmp	formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2760	powershell.exe

Deletes itself 1 IoCs

pid	Process
2688	cmd.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 468 set thread context of 2720	468	image_00yu.exe	33
PID 2720 set thread context of 1256	2720	image_00yu.exe	21
PID 2720 set thread context of 1256	2720	image_00yu.exe	21
PID 2608 set thread context of 1256	2608	wscript.exe	21

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	image_00yu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wscript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 35 IoCs

pid	Process
468	image_00yu.exe
468	image_00yu.exe
468	image_00yu.exe
468	image_00yu.exe
468	image_00yu.exe
468	image_00yu.exe
468	image_00yu.exe
2720	image_00yu.exe
2720	image_00yu.exe
2760	powershell.exe
2720	image_00yu.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe
2608	wscript.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2720	image_00yu.exe
2720	image_00yu.exe
2720	image_00yu.exe
2720	image_00yu.exe
2608	wscript.exe
2608	wscript.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	468	image_00yu.exe
Token: SeDebugPrivilege	2720	image_00yu.exe
Token: SeDebugPrivilege	2760	powershell.exe
Token: SeDebugPrivilege	2608	wscript.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 468 wrote to memory of 2760	468	image_00yu.exe	31
PID 468 wrote to memory of 2760	468	image_00yu.exe	31
PID 468 wrote to memory of 2760	468	image_00yu.exe	31
PID 468 wrote to memory of 2760	468	image_00yu.exe	31
PID 468 wrote to memory of 2720	468	image_00yu.exe	33
PID 468 wrote to memory of 2720	468	image_00yu.exe	33
PID 468 wrote to memory of 2720	468	image_00yu.exe	33
PID 468 wrote to memory of 2720	468	image_00yu.exe	33
PID 468 wrote to memory of 2720	468	image_00yu.exe	33
PID 468 wrote to memory of 2720	468	image_00yu.exe	33
PID 468 wrote to memory of 2720	468	image_00yu.exe	33
PID 1256 wrote to memory of 2608	1256	Explorer.EXE	34
PID 1256 wrote to memory of 2608	1256	Explorer.EXE	34
PID 1256 wrote to memory of 2608	1256	Explorer.EXE	34
PID 1256 wrote to memory of 2608	1256	Explorer.EXE	34
PID 2608 wrote to memory of 2688	2608	wscript.exe	35
PID 2608 wrote to memory of 2688	2608	wscript.exe	35
PID 2608 wrote to memory of 2688	2608	wscript.exe	35
PID 2608 wrote to memory of 2688	2608	wscript.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1256
- C:\Users\Admin\AppData\Local\Temp\image_00yu.exe
  "C:\Users\Admin\AppData\Local\Temp\image_00yu.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:468
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\image_00yu.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2760
- - C:\Users\Admin\AppData\Local\Temp\image_00yu.exe
    "C:\Users\Admin\AppData\Local\Temp\image_00yu.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2720
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\SysWOW64\wscript.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:2608
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\image_00yu.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/468-23-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/468-7-0x00000000005B0000-0x00000000005BC000-memory.dmp

Filesize
48KB

Download
memory/468-2-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/468-3-0x00000000045D0000-0x000000000466A000-memory.dmp

Filesize
616KB

Download
memory/468-4-0x0000000001D90000-0x0000000001DAA000-memory.dmp

Filesize
104KB

Download
memory/468-5-0x0000000073FFE000-0x0000000073FFF000-memory.dmp

Filesize
4KB

Download
memory/468-6-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/468-0-0x0000000073FFE000-0x0000000073FFF000-memory.dmp

Filesize
4KB

Download
memory/468-8-0x0000000000760000-0x0000000000770000-memory.dmp

Filesize
64KB

Download
memory/468-9-0x0000000005240000-0x00000000052B6000-memory.dmp

Filesize
472KB

Download
memory/468-1-0x0000000000040000-0x00000000000EE000-memory.dmp

Filesize
696KB

Download
memory/1256-30-0x0000000006C50000-0x0000000006D9A000-memory.dmp

Filesize
1.3MB

Download
memory/1256-27-0x0000000004360000-0x0000000004560000-memory.dmp

Filesize
2.0MB

Download
memory/1256-22-0x0000000006C50000-0x0000000006D9A000-memory.dmp

Filesize
1.3MB

Download
memory/2608-31-0x00000000000B0000-0x00000000000DF000-memory.dmp

Filesize
188KB

Download
memory/2608-29-0x0000000000D40000-0x0000000000D66000-memory.dmp

Filesize
152KB

Download
memory/2720-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2720-19-0x00000000009C0000-0x0000000000CC3000-memory.dmp

Filesize
3.0MB

Download
memory/2720-10-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2720-21-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2720-28-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2720-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2720-20-0x0000000000370000-0x0000000000384000-memory.dmp

Filesize
80KB

Download
memory/2720-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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