formbook | b4a385e3626a025b4bff6b40295656d39310662e23380c5e869b332c48f7b93a

General

Target

malw.exe
Size

590KB
MD5

9670e05fd8e4a6fb0b5db5436c3832a0
SHA1

1a77ac485ab8271b77c7a5e31aa7aae84ab936f8
SHA256

b4a385e3626a025b4bff6b40295656d39310662e23380c5e869b332c48f7b93a
SHA512

d74e47e8fcb1c1029d06403c867774dbc563050d24326b83915467f6bb71f7e40cf2656ae839db35802c9aac0e7c7d1fe8c9476a8ef98292b55702b76ef490fb
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 4 IoCs

rat

resource	yara_rule
behavioral1/memory/2404-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2404-18-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2404-24-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1412-27-0x0000000000070000-0x000000000009F000-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
2860	powershell.exe

Deletes itself 1 IoCs

pid	Process
1732	cmd.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2140 set thread context of 2404	2140	malw.exe	32
PID 2404 set thread context of 1160	2404	malw.exe	21
PID 2404 set thread context of 1160	2404	malw.exe	21
PID 1412 set thread context of 1160	1412	wscript.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	malw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wscript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
2404	malw.exe
2404	malw.exe
2860	powershell.exe
2404	malw.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe
1412	wscript.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1160	Explorer.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2404	malw.exe
2404	malw.exe
2404	malw.exe
2404	malw.exe
1412	wscript.exe
1412	wscript.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2404	malw.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	1412	wscript.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2140 wrote to memory of 2860	2140	malw.exe	30
PID 2140 wrote to memory of 2860	2140	malw.exe	30
PID 2140 wrote to memory of 2860	2140	malw.exe	30
PID 2140 wrote to memory of 2860	2140	malw.exe	30
PID 2140 wrote to memory of 2404	2140	malw.exe	32
PID 2140 wrote to memory of 2404	2140	malw.exe	32
PID 2140 wrote to memory of 2404	2140	malw.exe	32
PID 2140 wrote to memory of 2404	2140	malw.exe	32
PID 2140 wrote to memory of 2404	2140	malw.exe	32
PID 2140 wrote to memory of 2404	2140	malw.exe	32
PID 2140 wrote to memory of 2404	2140	malw.exe	32
PID 1160 wrote to memory of 1412	1160	Explorer.EXE	33
PID 1160 wrote to memory of 1412	1160	Explorer.EXE	33
PID 1160 wrote to memory of 1412	1160	Explorer.EXE	33
PID 1160 wrote to memory of 1412	1160	Explorer.EXE	33
PID 1412 wrote to memory of 1732	1412	wscript.exe	34
PID 1412 wrote to memory of 1732	1412	wscript.exe	34
PID 1412 wrote to memory of 1732	1412	wscript.exe	34
PID 1412 wrote to memory of 1732	1412	wscript.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1160
- C:\Users\Admin\AppData\Local\Temp\malw.exe
  "C:\Users\Admin\AppData\Local\Temp\malw.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2140
- - 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\malw.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2860
- - C:\Users\Admin\AppData\Local\Temp\malw.exe
    "C:\Users\Admin\AppData\Local\Temp\malw.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2404
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\SysWOW64\wscript.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:1412
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\malw.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:1732

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/1160-29-0x0000000007FB0000-0x000000000812F000-memory.dmp

Filesize
1.5MB

Download
memory/1160-17-0x0000000002F20000-0x0000000003020000-memory.dmp

Filesize
1024KB

Download
memory/1160-20-0x0000000004C00000-0x0000000004CEA000-memory.dmp

Filesize
936KB

Download
memory/1160-26-0x0000000004C00000-0x0000000004CEA000-memory.dmp

Filesize
936KB

Download
memory/1412-25-0x0000000000560000-0x0000000000586000-memory.dmp

Filesize
152KB

Download
memory/1412-27-0x0000000000070000-0x000000000009F000-memory.dmp

Filesize
188KB

Download
memory/2140-3-0x0000000000650000-0x0000000000662000-memory.dmp

Filesize
72KB

Download
memory/2140-6-0x00000000008A0000-0x0000000000916000-memory.dmp

Filesize
472KB

Download
memory/2140-5-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/2140-4-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/2140-0-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/2140-14-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/2140-2-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/2140-1-0x0000000000320000-0x00000000003BA000-memory.dmp

Filesize
616KB

Download
memory/2404-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2404-18-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2404-19-0x0000000000290000-0x00000000002A4000-memory.dmp

Filesize
80KB

Download
memory/2404-24-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2404-15-0x0000000000AE0000-0x0000000000DE3000-memory.dmp

Filesize
3.0MB

Download
memory/2404-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2404-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2404-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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