formbook | 05058845f830c184d8e97d779426424ffa31a10f48300f4716b55539db735813

Analysis

max time kernel
145s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-10-2024 11:15

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General

Target

Dekont.exe
Size

731KB
MD5

b13f89d8eafc3a90742bb8fe102e4225
SHA1

8c0a430ea82da3282be9c2dc2011c0d1b4a3cc2b
SHA256

e7fc9e51d81f4b40dca80a3d83ca54a03120566b6dd6f76e0299546ac178f633
SHA512

85d98bc784bce0cbf5d7264e44b89d1a72c7892aeb9defbe622f7844479d9dcd06d2679e7ec0e2f8691af334dfdbb17540ffb55f24e2f06b8ecb9f53b5f13e13
SSDEEP

12288:53O+0J9NQxftcBfz6wzGxGOuyNwuhzKm+gATKkwpf8Z0l14r7N5:JqJvQxFu76eGEnymcATXwpfGj7N

Score

10^/10

formbook bc01 discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

bc01

Decoy

epatitis-treatment-26155.bond

52cy67sk.bond

nline-degree-6987776.world

ingxingdiandeng-2033.top

mberbreeze.cyou

48xc300mw.autos

obs-for-seniors-39582.bond

tpetersburg-3-tonn.online

egafon-parser.online

172jh.shop

ltraman.pro

bqfhnys.shop

ntercash24-cad.homes

uhtwister.cloud

alk-in-tubs-27353.bond

ucas-saaad.buzz

oko.events

8080713.xyz

refabricated-homes-74404.bond

inaa.boo

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/1516-11-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/1516-18-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/1676-70-0x0000000000710000-0x000000000073F000-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
3580	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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	Dekont.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3996 set thread context of 1516	3996	Dekont.exe	89
PID 1516 set thread context of 3400	1516	Dekont.exe	55
PID 1676 set thread context of 3400	1676	mstsc.exe	55

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	Dekont.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mstsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 58 IoCs

pid	Process
1516	Dekont.exe
1516	Dekont.exe
1516	Dekont.exe
1516	Dekont.exe
3580	powershell.exe
3580	powershell.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe
1676	mstsc.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1516	Dekont.exe
1516	Dekont.exe
1516	Dekont.exe
1676	mstsc.exe
1676	mstsc.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1516	Dekont.exe
Token: SeDebugPrivilege	3580	powershell.exe
Token: SeShutdownPrivilege	3400	Explorer.EXE
Token: SeCreatePagefilePrivilege	3400	Explorer.EXE
Token: SeDebugPrivilege	1676	mstsc.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3996 wrote to memory of 3580	3996	Dekont.exe	87
PID 3996 wrote to memory of 3580	3996	Dekont.exe	87
PID 3996 wrote to memory of 3580	3996	Dekont.exe	87
PID 3996 wrote to memory of 1516	3996	Dekont.exe	89
PID 3996 wrote to memory of 1516	3996	Dekont.exe	89
PID 3996 wrote to memory of 1516	3996	Dekont.exe	89
PID 3996 wrote to memory of 1516	3996	Dekont.exe	89
PID 3996 wrote to memory of 1516	3996	Dekont.exe	89
PID 3996 wrote to memory of 1516	3996	Dekont.exe	89
PID 3400 wrote to memory of 1676	3400	Explorer.EXE	90
PID 3400 wrote to memory of 1676	3400	Explorer.EXE	90
PID 3400 wrote to memory of 1676	3400	Explorer.EXE	90
PID 1676 wrote to memory of 3292	1676	mstsc.exe	93
PID 1676 wrote to memory of 3292	1676	mstsc.exe	93
PID 1676 wrote to memory of 3292	1676	mstsc.exe	93

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3400
- 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:3996
- - 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:3580
- - 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:1516
- C:\Windows\SysWOW64\mstsc.exe
  "C:\Windows\SysWOW64\mstsc.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:1676
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Dekont.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3292

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bwxck1zu.zch.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1516-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1516-18-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1516-19-0x00000000010A0000-0x00000000010B4000-memory.dmp

Filesize
80KB

Download
memory/1516-14-0x00000000013B0000-0x00000000016FA000-memory.dmp

Filesize
3.3MB

Download
memory/1676-70-0x0000000000710000-0x000000000073F000-memory.dmp

Filesize
188KB

Download
memory/1676-68-0x00000000005D0000-0x000000000070A000-memory.dmp

Filesize
1.2MB

Download
memory/1676-66-0x00000000005D0000-0x000000000070A000-memory.dmp

Filesize
1.2MB

Download
memory/3400-74-0x0000000008D00000-0x0000000008E7A000-memory.dmp

Filesize
1.5MB

Download
memory/3400-69-0x0000000008850000-0x0000000008970000-memory.dmp

Filesize
1.1MB

Download
memory/3400-21-0x0000000008850000-0x0000000008970000-memory.dmp

Filesize
1.1MB

Download
memory/3580-24-0x0000000005240000-0x0000000005262000-memory.dmp

Filesize
136KB

Download
memory/3580-40-0x00000000068E0000-0x0000000006912000-memory.dmp

Filesize
200KB

Download
memory/3580-63-0x0000000007960000-0x0000000007968000-memory.dmp

Filesize
32KB

Download
memory/3580-17-0x00000000054A0000-0x0000000005AC8000-memory.dmp

Filesize
6.2MB

Download
memory/3580-23-0x0000000002A90000-0x0000000002AA0000-memory.dmp

Filesize
64KB

Download
memory/3580-22-0x0000000002A90000-0x0000000002AA0000-memory.dmp

Filesize
64KB

Download
memory/3580-62-0x0000000007980000-0x000000000799A000-memory.dmp

Filesize
104KB

Download
memory/3580-20-0x00000000751EE000-0x00000000751EF000-memory.dmp

Filesize
4KB

Download
memory/3580-61-0x0000000007880000-0x0000000007894000-memory.dmp

Filesize
80KB

Download
memory/3580-60-0x0000000007870000-0x000000000787E000-memory.dmp

Filesize
56KB

Download
memory/3580-26-0x0000000005B40000-0x0000000005BA6000-memory.dmp

Filesize
408KB

Download
memory/3580-25-0x00000000053E0000-0x0000000005446000-memory.dmp

Filesize
408KB

Download
memory/3580-59-0x0000000007840000-0x0000000007851000-memory.dmp

Filesize
68KB

Download
memory/3580-58-0x00000000078C0000-0x0000000007956000-memory.dmp

Filesize
600KB

Download
memory/3580-16-0x0000000002A00000-0x0000000002A36000-memory.dmp

Filesize
216KB

Download
memory/3580-36-0x0000000005D10000-0x0000000006064000-memory.dmp

Filesize
3.3MB

Download
memory/3580-37-0x0000000006320000-0x000000000633E000-memory.dmp

Filesize
120KB

Download
memory/3580-38-0x00000000063B0000-0x00000000063FC000-memory.dmp

Filesize
304KB

Download
memory/3580-39-0x000000007F360000-0x000000007F370000-memory.dmp

Filesize
64KB

Download
memory/3580-57-0x00000000076B0000-0x00000000076BA000-memory.dmp

Filesize
40KB

Download
memory/3580-41-0x0000000071000000-0x000000007104C000-memory.dmp

Filesize
304KB

Download
memory/3580-43-0x0000000002A90000-0x0000000002AA0000-memory.dmp

Filesize
64KB

Download
memory/3580-42-0x0000000002A90000-0x0000000002AA0000-memory.dmp

Filesize
64KB

Download
memory/3580-53-0x0000000006950000-0x000000000696E000-memory.dmp

Filesize
120KB

Download
memory/3580-54-0x0000000007510000-0x00000000075B3000-memory.dmp

Filesize
652KB

Download
memory/3580-55-0x0000000007C80000-0x00000000082FA000-memory.dmp

Filesize
6.5MB

Download
memory/3580-56-0x0000000007640000-0x000000000765A000-memory.dmp

Filesize
104KB

Download
memory/3996-13-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/3996-6-0x0000000005090000-0x00000000050AE000-memory.dmp

Filesize
120KB

Download
memory/3996-0-0x000000007516E000-0x000000007516F000-memory.dmp

Filesize
4KB

Download
memory/3996-7-0x000000007516E000-0x000000007516F000-memory.dmp

Filesize
4KB

Download
memory/3996-8-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/3996-9-0x00000000045E0000-0x0000000004656000-memory.dmp

Filesize
472KB

Download
memory/3996-10-0x000000000BB10000-0x000000000BBAC000-memory.dmp

Filesize
624KB

Download
memory/3996-5-0x0000000004DD0000-0x0000000004DDA000-memory.dmp

Filesize
40KB

Download
memory/3996-4-0x0000000075160000-0x0000000075910000-memory.dmp

Filesize
7.7MB

Download
memory/3996-3-0x0000000004C00000-0x0000000004C92000-memory.dmp

Filesize
584KB

Download
memory/3996-2-0x00000000050B0000-0x0000000005654000-memory.dmp

Filesize
5.6MB

Download
memory/3996-1-0x0000000000160000-0x000000000021E000-memory.dmp

Filesize
760KB

Download