formbook | 95d75622d314e27cd7ff796245897f4a68787a166d5dec0b2464d820e526492d

General

Target

6.exe
Size

762KB
MD5

8389dab9dc0d6595ea72c3550da3e1da
SHA1

51ca86545033133ac0b64cae05b28d5f3c2d6d8e
SHA256

95d75622d314e27cd7ff796245897f4a68787a166d5dec0b2464d820e526492d
SHA512

14b4c337e2381fbc34ecf59a073fc6d49934008a54d1c46075d7cd669734c5bf958ba15df444a7b5898dd559ed7a13fa4100254ca0daaf478cd50ac650311be0
SSDEEP

12288:uYgMIO8DfDrRrA0qzOq1+ceatVXmFvFMmRdLvn+H9srzlozkZIad:uYgnfvRkXBx2s9srz4UIad

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/2820-14-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2820-18-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2524-24-0x00000000000D0000-0x00000000000FF000-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
2556	powershell.exe

Deletes itself 1 IoCs

pid	Process
2484	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2932 set thread context of 2820	2932	6.exe	31
PID 2820 set thread context of 1200	2820	6.exe	21
PID 2524 set thread context of 1200	2524	cmstp.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	6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmstp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2820	6.exe
2820	6.exe
2556	powershell.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe
2524	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1200	Explorer.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2820	6.exe
2820	6.exe
2820	6.exe
2524	cmstp.exe
2524	cmstp.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	6.exe
Token: SeDebugPrivilege	2556	powershell.exe
Token: SeDebugPrivilege	2524	cmstp.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2556	2932	6.exe	29
PID 2932 wrote to memory of 2556	2932	6.exe	29
PID 2932 wrote to memory of 2556	2932	6.exe	29
PID 2932 wrote to memory of 2556	2932	6.exe	29
PID 2932 wrote to memory of 2820	2932	6.exe	31
PID 2932 wrote to memory of 2820	2932	6.exe	31
PID 2932 wrote to memory of 2820	2932	6.exe	31
PID 2932 wrote to memory of 2820	2932	6.exe	31
PID 2932 wrote to memory of 2820	2932	6.exe	31
PID 2932 wrote to memory of 2820	2932	6.exe	31
PID 2932 wrote to memory of 2820	2932	6.exe	31
PID 1200 wrote to memory of 2524	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2524	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2524	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2524	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2524	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2524	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2524	1200	Explorer.EXE	32
PID 2524 wrote to memory of 2484	2524	cmstp.exe	33
PID 2524 wrote to memory of 2484	2524	cmstp.exe	33
PID 2524 wrote to memory of 2484	2524	cmstp.exe	33
PID 2524 wrote to memory of 2484	2524	cmstp.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Users\Admin\AppData\Local\Temp\6.exe
  "C:\Users\Admin\AppData\Local\Temp\6.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2932
- - 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\6.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2556
- - C:\Users\Admin\AppData\Local\Temp\6.exe
    "C:\Users\Admin\AppData\Local\Temp\6.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2820
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.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:2524
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\6.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2484

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/1200-20-0x00000000051B0000-0x00000000052CA000-memory.dmp

Filesize
1.1MB

Download
memory/1200-34-0x0000000007180000-0x0000000007303000-memory.dmp

Filesize
1.5MB

Download
memory/1200-25-0x00000000051B0000-0x00000000052CA000-memory.dmp

Filesize
1.1MB

Download
memory/2524-24-0x00000000000D0000-0x00000000000FF000-memory.dmp

Filesize
188KB

Download
memory/2524-23-0x0000000000900000-0x0000000000918000-memory.dmp

Filesize
96KB

Download
memory/2820-18-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2820-16-0x0000000000E00000-0x0000000001103000-memory.dmp

Filesize
3.0MB

Download
memory/2820-14-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2820-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2820-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2820-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2820-19-0x0000000000180000-0x0000000000194000-memory.dmp

Filesize
80KB

Download
memory/2932-6-0x00000000009D0000-0x0000000000A48000-memory.dmp

Filesize
480KB

Download
memory/2932-15-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/2932-5-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/2932-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/2932-4-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/2932-3-0x00000000003B0000-0x00000000003D6000-memory.dmp

Filesize
152KB

Download
memory/2932-2-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/2932-1-0x0000000000D30000-0x0000000000DF4000-memory.dmp

Filesize
784KB

Download

Analysis

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