formbook | 54f50cdad3e5039d3207566e1b9de6e16913993ba2aa711e6f91a68e093ed9c4

Analysis

max time kernel
150s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2025, 13:08

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General

Target

Outstanding Invoice Payment00199pdf.exe
Size

642KB
MD5

9b2a1cefdfe5a139f0280c3ea3d3011f
SHA1

f7c7217d5cf033202ddc38d189d12287e09903d7
SHA256

54f50cdad3e5039d3207566e1b9de6e16913993ba2aa711e6f91a68e093ed9c4
SHA512

c6fe3e87eab347fa519b285b07e420eca261e56a777464cfaf37f00febaa6185d8d91b3dece74355604de6ed12b52e0f2845086e477b700adf3bc6cd03f28348
SSDEEP

12288:kqFCggCRxM6E1CpqSgcxOYqEEHhhHUiQEiYQsWZFOF/kR:L+6sE2EEBhHUiQEiLsIOY

Score

10^/10

formbook bi14 discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

bi14

Decoy

ilansocials.online

rishticodiegfortyseven.online

ostase-ba.cfd

cinema.tech

omprasyacol.store

esir.shop

umhyal3gvbpl.xyz

lurv.wtf

aospin-sms.xyz

itness-apps-workout1.sbs

reshcarluxury.shop

3xq3.cyou

erraceheatpassion.lifestyle

octurasys.net

ilyrug.net

yj889.xyz

railertof.net

4270766.xyz

sduoduo11.sbs

oeboom.net

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
behavioral1/memory/5740-25-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1976-92-0x0000000000E30000-0x0000000000E5F000-memory.dmp	formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4916	powershell.exe
4416	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3630502724-2561614198-3854231964-1000\Control Panel\International\Geo\Nation	Outstanding Invoice Payment00199pdf.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 5748 set thread context of 5740	5748	Outstanding Invoice Payment00199pdf.exe	102
PID 5740 set thread context of 3460	5740	vbc.exe	56
PID 1976 set thread context of 3460	1976	msdt.exe	56

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 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	Outstanding Invoice Payment00199pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	Explorer.EXE
Key created	\REGISTRY\USER\S-1-5-21-3630502724-2561614198-3854231964-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	Explorer.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1812	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5748	Outstanding Invoice Payment00199pdf.exe
5748	Outstanding Invoice Payment00199pdf.exe
5748	Outstanding Invoice Payment00199pdf.exe
5748	Outstanding Invoice Payment00199pdf.exe
4416	powershell.exe
4416	powershell.exe
4916	powershell.exe
4916	powershell.exe
5748	Outstanding Invoice Payment00199pdf.exe
5748	Outstanding Invoice Payment00199pdf.exe
5740	vbc.exe
5740	vbc.exe
5740	vbc.exe
5740	vbc.exe
5740	vbc.exe
4416	powershell.exe
4916	powershell.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe
1976	msdt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3460	Explorer.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
5740	vbc.exe
5740	vbc.exe
5740	vbc.exe
1976	msdt.exe
1976	msdt.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeDebugPrivilege	5748	Outstanding Invoice Payment00199pdf.exe
Token: SeDebugPrivilege	4916	powershell.exe
Token: SeDebugPrivilege	4416	powershell.exe
Token: SeDebugPrivilege	5740	vbc.exe
Token: SeDebugPrivilege	1976	msdt.exe
Token: SeShutdownPrivilege	3460	Explorer.EXE
Token: SeCreatePagefilePrivilege	3460	Explorer.EXE
Token: SeShutdownPrivilege	3460	Explorer.EXE
Token: SeCreatePagefilePrivilege	3460	Explorer.EXE
Token: SeShutdownPrivilege	3460	Explorer.EXE
Token: SeCreatePagefilePrivilege	3460	Explorer.EXE
Token: SeShutdownPrivilege	3460	Explorer.EXE
Token: SeCreatePagefilePrivilege	3460	Explorer.EXE

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3460	Explorer.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 5748 wrote to memory of 4916	5748	Outstanding Invoice Payment00199pdf.exe	96
PID 5748 wrote to memory of 4916	5748	Outstanding Invoice Payment00199pdf.exe	96
PID 5748 wrote to memory of 4916	5748	Outstanding Invoice Payment00199pdf.exe	96
PID 5748 wrote to memory of 4416	5748	Outstanding Invoice Payment00199pdf.exe	98
PID 5748 wrote to memory of 4416	5748	Outstanding Invoice Payment00199pdf.exe	98
PID 5748 wrote to memory of 4416	5748	Outstanding Invoice Payment00199pdf.exe	98
PID 5748 wrote to memory of 1812	5748	Outstanding Invoice Payment00199pdf.exe	100
PID 5748 wrote to memory of 1812	5748	Outstanding Invoice Payment00199pdf.exe	100
PID 5748 wrote to memory of 1812	5748	Outstanding Invoice Payment00199pdf.exe	100
PID 5748 wrote to memory of 5740	5748	Outstanding Invoice Payment00199pdf.exe	102
PID 5748 wrote to memory of 5740	5748	Outstanding Invoice Payment00199pdf.exe	102
PID 5748 wrote to memory of 5740	5748	Outstanding Invoice Payment00199pdf.exe	102
PID 5748 wrote to memory of 5740	5748	Outstanding Invoice Payment00199pdf.exe	102
PID 5748 wrote to memory of 5740	5748	Outstanding Invoice Payment00199pdf.exe	102
PID 5748 wrote to memory of 5740	5748	Outstanding Invoice Payment00199pdf.exe	102
PID 3460 wrote to memory of 1976	3460	Explorer.EXE	103
PID 3460 wrote to memory of 1976	3460	Explorer.EXE	103
PID 3460 wrote to memory of 1976	3460	Explorer.EXE	103
PID 1976 wrote to memory of 3572	1976	msdt.exe	104
PID 1976 wrote to memory of 3572	1976	msdt.exe	104
PID 1976 wrote to memory of 3572	1976	msdt.exe	104

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3460
- C:\Users\Admin\AppData\Local\Temp\Outstanding Invoice Payment00199pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Outstanding Invoice Payment00199pdf.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5748
- - 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\Outstanding Invoice Payment00199pdf.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4916
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\efQbHyNNWR.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4416
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efQbHyNNWR" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBB41.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1812
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:5740
- 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:1976
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3572

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
3d086a433708053f9bf9523e1d87a4e8

SHA1
b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

SHA256
6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

SHA512
931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
2be84520f11c1d77ca66fcee899d288c

SHA1
97f7fb6ce1198e43136d5f7630981eba06004af8

SHA256
b4c9332ee19d8c9d698f1636cc66f2c74afe95441873187d7c438d961805d256

SHA512
0160484e983510d4530332cc3a67582eb0bfd64ad61294137def774521b3dfda26238d50d6499b0533ae2efd4cede13a95d9c87f2eef225c3d13871f23ddb825

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5qgwcsrr.p3o.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBB41.tmp

Filesize
1KB

MD5
1f9506dac1bce5089c3e90af1955b67c

SHA1
80420074242addb6cd5e29ae27338d2f145723dd

SHA256
8a9e3486b6cea3d69c1c60977df619469a61f286b1523b0a255ffbe03d59c7be

SHA512
a2b427b1e64c49d5d247a5e9148d14b6169a83509c0e4cf327104ffc8fe0a1893a110cd402312a5adf282681b7f2b3369139434c2c0a65980a6e766c55df61e7

Download Submit
memory/1976-65-0x00000000009C0000-0x0000000000A17000-memory.dmp

Filesize
348KB

Download
memory/1976-92-0x0000000000E30000-0x0000000000E5F000-memory.dmp

Filesize
188KB

Download
memory/3460-94-0x0000000008B90000-0x0000000008CAD000-memory.dmp

Filesize
1.1MB

Download
memory/4416-66-0x0000000075430000-0x000000007547C000-memory.dmp

Filesize
304KB

Download
memory/4416-51-0x0000000006320000-0x000000000636C000-memory.dmp

Filesize
304KB

Download
memory/4416-50-0x0000000005DE0000-0x0000000005DFE000-memory.dmp

Filesize
120KB

Download
memory/4416-28-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/4416-87-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/4416-24-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/4416-20-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/4916-44-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/4916-80-0x0000000006FD0000-0x0000000006FE1000-memory.dmp

Filesize
68KB

Download
memory/4916-17-0x0000000004DC0000-0x00000000053E8000-memory.dmp

Filesize
6.2MB

Download
memory/4916-23-0x0000000004CF0000-0x0000000004D56000-memory.dmp

Filesize
408KB

Download
memory/4916-16-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/4916-26-0x0000000005470000-0x00000000057C4000-memory.dmp

Filesize
3.3MB

Download
memory/4916-91-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/4916-22-0x0000000004C80000-0x0000000004CE6000-memory.dmp

Filesize
408KB

Download
memory/4916-15-0x0000000002180000-0x00000000021B6000-memory.dmp

Filesize
216KB

Download
memory/4916-84-0x00000000070F0000-0x00000000070F8000-memory.dmp

Filesize
32KB

Download
memory/4916-83-0x0000000007110000-0x000000000712A000-memory.dmp

Filesize
104KB

Download
memory/4916-82-0x0000000007010000-0x0000000007024000-memory.dmp

Filesize
80KB

Download
memory/4916-21-0x0000000004AE0000-0x0000000004B02000-memory.dmp

Filesize
136KB

Download
memory/4916-81-0x0000000007000000-0x000000000700E000-memory.dmp

Filesize
56KB

Download
memory/4916-18-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/4916-53-0x0000000075430000-0x000000007547C000-memory.dmp

Filesize
304KB

Download
memory/4916-52-0x0000000006C30000-0x0000000006C62000-memory.dmp

Filesize
200KB

Download
memory/4916-63-0x0000000006C10000-0x0000000006C2E000-memory.dmp

Filesize
120KB

Download
memory/4916-64-0x0000000006C80000-0x0000000006D23000-memory.dmp

Filesize
652KB

Download
memory/4916-79-0x0000000007050000-0x00000000070E6000-memory.dmp

Filesize
600KB

Download
memory/4916-78-0x0000000006E40000-0x0000000006E4A000-memory.dmp

Filesize
40KB

Download
memory/4916-77-0x0000000006DD0000-0x0000000006DEA000-memory.dmp

Filesize
104KB

Download
memory/4916-76-0x0000000007410000-0x0000000007A8A000-memory.dmp

Filesize
6.5MB

Download
memory/5740-25-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/5748-0-0x0000000074BAE000-0x0000000074BAF000-memory.dmp

Filesize
4KB

Download
memory/5748-8-0x0000000074BAE000-0x0000000074BAF000-memory.dmp

Filesize
4KB

Download
memory/5748-9-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/5748-49-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/5748-10-0x0000000006E60000-0x0000000006ED8000-memory.dmp

Filesize
480KB

Download
memory/5748-6-0x0000000005AD0000-0x0000000005B6C000-memory.dmp

Filesize
624KB

Download
memory/5748-5-0x0000000074BA0000-0x0000000075350000-memory.dmp

Filesize
7.7MB

Download
memory/5748-4-0x0000000005830000-0x000000000583A000-memory.dmp

Filesize
40KB

Download
memory/5748-3-0x0000000005860000-0x00000000058F2000-memory.dmp

Filesize
584KB

Download
memory/5748-7-0x0000000005AB0000-0x0000000005AC2000-memory.dmp

Filesize
72KB

Download
memory/5748-2-0x0000000005E10000-0x00000000063B4000-memory.dmp

Filesize
5.6MB

Download
memory/5748-1-0x0000000000EC0000-0x0000000000F64000-memory.dmp

Filesize
656KB

Download