formbook | fa2a38ee7933b6eec66fed45d0f14e9cb4009ce04d5b56cf7e753af46626ada0

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
01-08-2024 07:18

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General

Target

Dekont.exe
Size

607KB
MD5

10a0eb65b2183e25abb783e188eb69e0
SHA1

86d0693cb57425c210c8e4dc0b588db254fb6e65
SHA256

fa2a38ee7933b6eec66fed45d0f14e9cb4009ce04d5b56cf7e753af46626ada0
SHA512

0cdc358bb6c1781843d1d32c40659bc07eba8e99573f946be6c141de98906511aae598a04ea80f9aef229f8fcf755fc2d53475bed46f89277678072e75681fb5
SSDEEP

12288:s4y2kNXpOEaScZtB/dIvhwg5A14raeOesU6aW6jndC:sV2opOEaS0tB/iZwEY5beuAjdC

Score

10^/10

formbook by21 discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

by21

Decoy

digitalillusions.net

changeblue25.com

kitchenwoow.com

grupocontigoalimentacion.com

iranabr.com

embodiedmagic.com

superstoreszone.com

apartments-for-rent-46883.bond

kelbagnole.com

rideskratchlab.com

a06kng.club

saddlebredallstars.xyz

filepd.com

kxetdf.asia

dl39yy.com

jackedsearch.com

exodusprofessionaldetailing.com

ecommerce-40144.bond

uh3b94g3pyczi9t.skin

dcmcc635i.xyz

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/852-10-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/852-15-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3132-67-0x0000000000BB0000-0x0000000000BDF000-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
4720	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-1-5-21-2077438316-259605770-1264560426-1000\Control Panel\International\Geo\Nation	Dekont.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3888 set thread context of 852	3888	Dekont.exe	88
PID 852 set thread context of 3460	852	Dekont.exe	56
PID 3132 set thread context of 3460	3132	wscript.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 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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wscript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Dekont.exe

Suspicious behavior: EnumeratesProcesses 58 IoCs

pid	Process
852	Dekont.exe
852	Dekont.exe
852	Dekont.exe
852	Dekont.exe
4720	powershell.exe
4720	powershell.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe
3132	wscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
852	Dekont.exe
852	Dekont.exe
852	Dekont.exe
3132	wscript.exe
3132	wscript.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	852	Dekont.exe
Token: SeDebugPrivilege	4720	powershell.exe
Token: SeDebugPrivilege	3132	wscript.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 15 IoCs

description	pid	Process	procid_target
PID 3888 wrote to memory of 4720	3888	Dekont.exe	86
PID 3888 wrote to memory of 4720	3888	Dekont.exe	86
PID 3888 wrote to memory of 4720	3888	Dekont.exe	86
PID 3888 wrote to memory of 852	3888	Dekont.exe	88
PID 3888 wrote to memory of 852	3888	Dekont.exe	88
PID 3888 wrote to memory of 852	3888	Dekont.exe	88
PID 3888 wrote to memory of 852	3888	Dekont.exe	88
PID 3888 wrote to memory of 852	3888	Dekont.exe	88
PID 3888 wrote to memory of 852	3888	Dekont.exe	88
PID 3460 wrote to memory of 3132	3460	Explorer.EXE	89
PID 3460 wrote to memory of 3132	3460	Explorer.EXE	89
PID 3460 wrote to memory of 3132	3460	Explorer.EXE	89
PID 3132 wrote to memory of 2808	3132	wscript.exe	90
PID 3132 wrote to memory of 2808	3132	wscript.exe	90
PID 3132 wrote to memory of 2808	3132	wscript.exe	90

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3460
- C:\Users\Admin\AppData\Local\Temp\Dekont.exe
  "C:\Users\Admin\AppData\Local\Temp\Dekont.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3888
- - 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\Dekont.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4720
- - C:\Users\Admin\AppData\Local\Temp\Dekont.exe
    "C:\Users\Admin\AppData\Local\Temp\Dekont.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:852
- 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:3132
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Dekont.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jf5zvrd0.jdl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/852-13-0x00000000010B0000-0x00000000013FA000-memory.dmp

Filesize
3.3MB

Download
memory/852-10-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/852-15-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/852-16-0x0000000000FF0000-0x0000000001004000-memory.dmp

Filesize
80KB

Download
memory/3132-53-0x0000000000B10000-0x0000000000B37000-memory.dmp

Filesize
156KB

Download
memory/3132-54-0x0000000000B10000-0x0000000000B37000-memory.dmp

Filesize
156KB

Download
memory/3132-67-0x0000000000BB0000-0x0000000000BDF000-memory.dmp

Filesize
188KB

Download
memory/3460-17-0x00000000085B0000-0x00000000086B7000-memory.dmp

Filesize
1.0MB

Download
memory/3460-71-0x0000000002A80000-0x0000000002B1C000-memory.dmp

Filesize
624KB

Download
memory/3460-69-0x00000000085B0000-0x00000000086B7000-memory.dmp

Filesize
1.0MB

Download
memory/3888-3-0x0000000004FA0000-0x0000000005032000-memory.dmp

Filesize
584KB

Download
memory/3888-0-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/3888-4-0x0000000004F20000-0x0000000004F2A000-memory.dmp

Filesize
40KB

Download
memory/3888-12-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3888-5-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3888-6-0x00000000051A0000-0x00000000051B6000-memory.dmp

Filesize
88KB

Download
memory/3888-9-0x0000000008690000-0x000000000872C000-memory.dmp

Filesize
624KB

Download
memory/3888-1-0x0000000000490000-0x000000000052E000-memory.dmp

Filesize
632KB

Download
memory/3888-2-0x0000000005550000-0x0000000005AF4000-memory.dmp

Filesize
5.6MB

Download
memory/3888-7-0x0000000005510000-0x000000000551E000-memory.dmp

Filesize
56KB

Download
memory/3888-8-0x00000000083D0000-0x0000000008446000-memory.dmp

Filesize
472KB

Download
memory/4720-19-0x00000000752AE000-0x00000000752AF000-memory.dmp

Filesize
4KB

Download
memory/4720-20-0x0000000005530000-0x0000000005B58000-memory.dmp

Filesize
6.2MB

Download
memory/4720-63-0x00000000079C0000-0x00000000079C8000-memory.dmp

Filesize
32KB

Download
memory/4720-23-0x0000000005430000-0x0000000005496000-memory.dmp

Filesize
408KB

Download
memory/4720-24-0x0000000005D10000-0x0000000005D76000-memory.dmp

Filesize
408KB

Download
memory/4720-18-0x0000000004DE0000-0x0000000004E16000-memory.dmp

Filesize
216KB

Download
memory/4720-38-0x0000000006930000-0x0000000006962000-memory.dmp

Filesize
200KB

Download
memory/4720-49-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download
memory/4720-39-0x00000000710C0000-0x000000007110C000-memory.dmp

Filesize
304KB

Download
memory/4720-50-0x0000000006910000-0x000000000692E000-memory.dmp

Filesize
120KB

Download
memory/4720-51-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download
memory/4720-35-0x0000000005FB0000-0x0000000006304000-memory.dmp

Filesize
3.3MB

Download
memory/4720-22-0x0000000005290000-0x00000000052B2000-memory.dmp

Filesize
136KB

Download
memory/4720-25-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download
memory/4720-55-0x0000000007CE0000-0x000000000835A000-memory.dmp

Filesize
6.5MB

Download
memory/4720-56-0x00000000076A0000-0x00000000076BA000-memory.dmp

Filesize
104KB

Download
memory/4720-57-0x0000000007710000-0x000000000771A000-memory.dmp

Filesize
40KB

Download
memory/4720-58-0x0000000007920000-0x00000000079B6000-memory.dmp

Filesize
600KB

Download
memory/4720-59-0x00000000078A0000-0x00000000078B1000-memory.dmp

Filesize
68KB

Download
memory/4720-60-0x00000000078D0000-0x00000000078DE000-memory.dmp

Filesize
56KB

Download
memory/4720-61-0x00000000078E0000-0x00000000078F4000-memory.dmp

Filesize
80KB

Download
memory/4720-21-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download
memory/4720-62-0x00000000079E0000-0x00000000079FA000-memory.dmp

Filesize
104KB

Download
memory/4720-66-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download
memory/4720-37-0x0000000006390000-0x00000000063DC000-memory.dmp

Filesize
304KB

Download
memory/4720-52-0x0000000007340000-0x00000000073E3000-memory.dmp

Filesize
652KB

Download
memory/4720-36-0x0000000006360000-0x000000000637E000-memory.dmp

Filesize
120KB

Download