formbook | ef0a49acd91623c090732ba2b2e15f707786e3554f71ac7b020b9e98a690b5f8

General

Target

Dekont.pdf.exe
Size

634KB
MD5

ec3a89fb3f145a68a25284c99c0e714e
SHA1

37f1784b83b3951be610bcc0a88d729aba113f7e
SHA256

462338cc416f17bb48135254e384d49b87dde3f0c40e6c51a70ad7abdecfc231
SHA512

b8e98cd2b5e8739f51fa6762183b85b33c613a47f6942dfba9ed6ad6485608b939589fee899ea5550030dd2d4cc8d734c235ed15cc5ab62493a60b6235fb594e
SSDEEP

12288:OnCiPGlFpYu3pOT+thfn3tumqHZGRosZQve/5hMB2Oy4IZklPrbH6ec4kqNu4FbX:++pl3Dth/3t9qHbsus228I2nAqNusbNB

Score

10^/10

formbook m10i discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

m10i

Decoy

rmani.today

ifebork.xyz

randovation.net

itchen-remodeling-65686.bond

himu.world

reverie.net

9038.top

rowahome.live

obility-scooters-63189.bond

iangchunqiu.top

yhd.fun

eniorsforseniors.biz

z9zs2.shop

kkjinni.buzz

22av373vu.autos

allnyy.fun

qst.digital

rcap.info

745.top

earfulabjectshirkwashclothe.cfd

Signatures

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

Formbook payload 1 IoCs

rat

resource	yara_rule
behavioral1/memory/536-12-0x0000000000400000-0x000000000042F000-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
2176	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1804 set thread context of 536	1804	Dekont.pdf.exe	33

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2872	536	WerFault.exe	33

System Location Discovery: System Language Discovery 1 TTPs 3 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	Dekont.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Dekont.pdf.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2176	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2176	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1804 wrote to memory of 2176	1804	Dekont.pdf.exe	31
PID 1804 wrote to memory of 2176	1804	Dekont.pdf.exe	31
PID 1804 wrote to memory of 2176	1804	Dekont.pdf.exe	31
PID 1804 wrote to memory of 2176	1804	Dekont.pdf.exe	31
PID 1804 wrote to memory of 536	1804	Dekont.pdf.exe	33
PID 1804 wrote to memory of 536	1804	Dekont.pdf.exe	33
PID 1804 wrote to memory of 536	1804	Dekont.pdf.exe	33
PID 1804 wrote to memory of 536	1804	Dekont.pdf.exe	33
PID 1804 wrote to memory of 536	1804	Dekont.pdf.exe	33
PID 1804 wrote to memory of 536	1804	Dekont.pdf.exe	33
PID 1804 wrote to memory of 536	1804	Dekont.pdf.exe	33
PID 536 wrote to memory of 2872	536	Dekont.pdf.exe	34
PID 536 wrote to memory of 2872	536	Dekont.pdf.exe	34
PID 536 wrote to memory of 2872	536	Dekont.pdf.exe	34
PID 536 wrote to memory of 2872	536	Dekont.pdf.exe	34

C:\Users\Admin\AppData\Local\Temp\Dekont.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Dekont.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1804
- 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.pdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2176
- C:\Users\Admin\AppData\Local\Temp\Dekont.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Dekont.pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:536
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 536 -s 36
    3⤵
    - Program crash
    PID:2872

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

Loading Replay Monitor...

Downloads

memory/536-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/536-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/536-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/536-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1804-0-0x00000000743BE000-0x00000000743BF000-memory.dmp

Filesize
4KB

Download
memory/1804-1-0x0000000000120000-0x00000000001C4000-memory.dmp

Filesize
656KB

Download
memory/1804-2-0x00000000743B0000-0x0000000074A9E000-memory.dmp

Filesize
6.9MB

Download
memory/1804-3-0x0000000000700000-0x0000000000718000-memory.dmp

Filesize
96KB

Download
memory/1804-4-0x00000000743BE000-0x00000000743BF000-memory.dmp

Filesize
4KB

Download
memory/1804-5-0x00000000743B0000-0x0000000074A9E000-memory.dmp

Filesize
6.9MB

Download
memory/1804-6-0x0000000005EE0000-0x0000000005F56000-memory.dmp

Filesize
472KB

Download
memory/1804-13-0x00000000743B0000-0x0000000074A9E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing