formbook | 4f4856cb0d348857a9c1080460bad16f6d5ab86c51b8041734a9c3204c5fc57c

General

Target

Dekont_30.exe
Size

804KB
MD5

853048d16c237765d3c0ffc07f9b2879
SHA1

a968bae9a55244d7de1a05b9e59254648f3815eb
SHA256

6153e389b9e4df22730eddb6f964c640e98661a45fc4578136dd6a33bb821fa5
SHA512

aa1376ce2a46c0772fb9d7e530669d05332656316be5dc4236ec4f4d4835e8ba3fa2debeee6d6644e9e240ec3fdf6c3a4e09eb9c1731d730094ad5ef10b1ebe8
SSDEEP

12288:urCkyCZMiLZ31cch3sln0h8KvqwB7UWg4kHpC7cVZH4:6yClFdsEKP4u+uY

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 family
formbook

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2652-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2652-17-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2440-23-0x0000000000080000-0x00000000000AF000-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
2700	powershell.exe

Deletes itself 1 IoCs

pid	Process
2580	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1860 set thread context of 2652	1860	Dekont_30.exe	30
PID 2652 set thread context of 1200	2652	Dekont_30.exe	21
PID 2440 set thread context of 1200	2440	NAPSTAT.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_30.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NAPSTAT.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2652	Dekont_30.exe
2652	Dekont_30.exe
2700	powershell.exe
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2652	Dekont_30.exe
2652	Dekont_30.exe
2652	Dekont_30.exe
2440	NAPSTAT.EXE
2440	NAPSTAT.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2652	Dekont_30.exe
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	2440	NAPSTAT.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1860 wrote to memory of 2700	1860	Dekont_30.exe	29
PID 1860 wrote to memory of 2700	1860	Dekont_30.exe	29
PID 1860 wrote to memory of 2700	1860	Dekont_30.exe	29
PID 1860 wrote to memory of 2700	1860	Dekont_30.exe	29
PID 1860 wrote to memory of 2652	1860	Dekont_30.exe	30
PID 1860 wrote to memory of 2652	1860	Dekont_30.exe	30
PID 1860 wrote to memory of 2652	1860	Dekont_30.exe	30
PID 1860 wrote to memory of 2652	1860	Dekont_30.exe	30
PID 1860 wrote to memory of 2652	1860	Dekont_30.exe	30
PID 1860 wrote to memory of 2652	1860	Dekont_30.exe	30
PID 1860 wrote to memory of 2652	1860	Dekont_30.exe	30
PID 1200 wrote to memory of 2440	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2440	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2440	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2440	1200	Explorer.EXE	32
PID 2440 wrote to memory of 2580	2440	NAPSTAT.EXE	33
PID 2440 wrote to memory of 2580	2440	NAPSTAT.EXE	33
PID 2440 wrote to memory of 2580	2440	NAPSTAT.EXE	33
PID 2440 wrote to memory of 2580	2440	NAPSTAT.EXE	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Users\Admin\AppData\Local\Temp\Dekont_30.exe
  "C:\Users\Admin\AppData\Local\Temp\Dekont_30.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1860
- - 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_30.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2700
- - C:\Users\Admin\AppData\Local\Temp\Dekont_30.exe
    "C:\Users\Admin\AppData\Local\Temp\Dekont_30.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2652
- C:\Windows\SysWOW64\NAPSTAT.EXE
  "C:\Windows\SysWOW64\NAPSTAT.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:2440
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Dekont_30.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2580

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/1200-18-0x00000000051B0000-0x00000000052A0000-memory.dmp

Filesize
960KB

Download
memory/1200-25-0x00000000051B0000-0x00000000052A0000-memory.dmp

Filesize
960KB

Download
memory/1860-19-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/1860-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/1860-4-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/1860-5-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/1860-6-0x0000000004E30000-0x0000000004EA8000-memory.dmp

Filesize
480KB

Download
memory/1860-3-0x00000000008F0000-0x000000000090C000-memory.dmp

Filesize
112KB

Download
memory/1860-1-0x0000000001220000-0x00000000012F0000-memory.dmp

Filesize
832KB

Download
memory/1860-2-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/2440-23-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/2440-22-0x0000000000D00000-0x0000000000D46000-memory.dmp

Filesize
280KB

Download
memory/2652-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2652-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2652-16-0x0000000000360000-0x0000000000374000-memory.dmp

Filesize
80KB

Download
memory/2652-15-0x0000000000900000-0x0000000000C03000-memory.dmp

Filesize
3.0MB

Download
memory/2652-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2652-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2652-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

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