formbook | 883b2afba671ff4851527b315260a4415a111c013811fec1822dcae4076628e5

General

Target

Dekont.exe
Size

590KB
MD5

da966801158ea63939a23e310275241a
SHA1

ef1f98cd080aca6cbf0b1ea8b08e7ab492435ae8
SHA256

883b2afba671ff4851527b315260a4415a111c013811fec1822dcae4076628e5
SHA512

0942fbf2efc18d7feff67c24c9d36528ab63937daa3d84c0f34f22d1466d184f38af24a5d264d908b252b6c3c3463f3b33e241aa72ba3e9bec43c55037c58bfd
SSDEEP

12288:Uh8bQbrxKlcjdOliPwsSpRYAKrgCqZKVvsABefO5fw:U+I9kiPqR/04KCABem

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
behavioral1/memory/2704-11-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2704-16-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2568-21-0x0000000000090000-0x00000000000BF000-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
1952	powershell.exe

Deletes itself 1 IoCs

pid	Process
2652	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2524 set thread context of 2704	2524	Dekont.exe	32
PID 2704 set thread context of 1192	2704	Dekont.exe	21
PID 2568 set thread context of 1192	2568	help.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	Dekont.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	help.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
2704	Dekont.exe
2704	Dekont.exe
1952	powershell.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe
2568	help.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2704	Dekont.exe
2704	Dekont.exe
2704	Dekont.exe
2568	help.exe
2568	help.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2704	Dekont.exe
Token: SeDebugPrivilege	1952	powershell.exe
Token: SeDebugPrivilege	2568	help.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 1952	2524	Dekont.exe	31
PID 2524 wrote to memory of 1952	2524	Dekont.exe	31
PID 2524 wrote to memory of 1952	2524	Dekont.exe	31
PID 2524 wrote to memory of 1952	2524	Dekont.exe	31
PID 2524 wrote to memory of 2704	2524	Dekont.exe	32
PID 2524 wrote to memory of 2704	2524	Dekont.exe	32
PID 2524 wrote to memory of 2704	2524	Dekont.exe	32
PID 2524 wrote to memory of 2704	2524	Dekont.exe	32
PID 2524 wrote to memory of 2704	2524	Dekont.exe	32
PID 2524 wrote to memory of 2704	2524	Dekont.exe	32
PID 2524 wrote to memory of 2704	2524	Dekont.exe	32
PID 1192 wrote to memory of 2568	1192	Explorer.EXE	34
PID 1192 wrote to memory of 2568	1192	Explorer.EXE	34
PID 1192 wrote to memory of 2568	1192	Explorer.EXE	34
PID 1192 wrote to memory of 2568	1192	Explorer.EXE	34
PID 2568 wrote to memory of 2652	2568	help.exe	35
PID 2568 wrote to memory of 2652	2568	help.exe	35
PID 2568 wrote to memory of 2652	2568	help.exe	35
PID 2568 wrote to memory of 2652	2568	help.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1192
- C:\Users\Admin\AppData\Local\Temp\Dekont.exe
  "C:\Users\Admin\AppData\Local\Temp\Dekont.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2524
- - 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:1952
- - 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:2704
- C:\Windows\SysWOW64\help.exe
  "C:\Windows\SysWOW64\help.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:2568
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Dekont.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2652

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/1192-17-0x0000000004DA0000-0x0000000004E5A000-memory.dmp

Filesize
744KB

Download
memory/1192-23-0x0000000004DA0000-0x0000000004E5A000-memory.dmp

Filesize
744KB

Download
memory/2524-1-0x0000000001090000-0x000000000112A000-memory.dmp

Filesize
616KB

Download
memory/2524-2-0x0000000074E80000-0x000000007556E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-3-0x00000000002D0000-0x00000000002E2000-memory.dmp

Filesize
72KB

Download
memory/2524-4-0x0000000074E8E000-0x0000000074E8F000-memory.dmp

Filesize
4KB

Download
memory/2524-5-0x0000000074E80000-0x000000007556E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-6-0x0000000004E10000-0x0000000004E86000-memory.dmp

Filesize
472KB

Download
memory/2524-0-0x0000000074E8E000-0x0000000074E8F000-memory.dmp

Filesize
4KB

Download
memory/2524-12-0x0000000074E80000-0x000000007556E000-memory.dmp

Filesize
6.9MB

Download
memory/2568-21-0x0000000000090000-0x00000000000BF000-memory.dmp

Filesize
188KB

Download
memory/2568-20-0x0000000000070000-0x0000000000076000-memory.dmp

Filesize
24KB

Download
memory/2704-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2704-15-0x0000000000290000-0x00000000002A4000-memory.dmp

Filesize
80KB

Download
memory/2704-14-0x0000000000770000-0x0000000000A73000-memory.dmp

Filesize
3.0MB

Download
memory/2704-16-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2704-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2704-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2704-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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