formbook | 2f821a2fe9c043b3d733b026c68f56b48ec6dedeb63518590fdcbec615b7919b

Analysis

max time kernel
150s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2025 01:30

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

rPO00299436pdf.exe
Size

1.0MB
MD5

81058dec298cc79bdfbc425b81c83ac4
SHA1

638571e70a20101132659469f2e859db6fc3674b
SHA256

2f821a2fe9c043b3d733b026c68f56b48ec6dedeb63518590fdcbec615b7919b
SHA512

895471a1cd02853f7967942771aec0396802a183f565d0c2bd1e3a285c34c54672d72f8667cf7a27e558e9fa5489903924294bde2104f6fa9d5ad480286b592d
SSDEEP

24576:iAHnh+eWsN3skA4RV1Hom2KXFmIafhOdUYbs5:lh+ZkldoPK1Xafkddm

Score

10^/10

formbook a38m discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

a38m

Decoy

rtfosters.net

ental-implants-97548.bond

raphic-design-degree-15820.bond

ompraninjas.shop

indmyusedcar.today

rumptraumasupport.net

uozwear.xyz

etron.xyz

dultlivebroadcast09.today

ypegen.net

arehouse-inventory-54057.bond

27961.pizza

ortable-ai.xyz

pioxc.xyz

nline-advertising-76059.bond

rendyshack.store

pa-services88.life

aftarpragmatic218gacor.online

yb1054.shop

8x189.xyz

Signatures

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

Formbook payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/2208-12-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/2208-15-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/2208-19-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/2780-25-0x00000000005C0000-0x00000000005EF000-memory.dmp	formbook

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4776 set thread context of 2208	4776	rPO00299436pdf.exe	86
PID 2208 set thread context of 3380	2208	svchost.exe	56
PID 2208 set thread context of 3380	2208	svchost.exe	56
PID 2780 set thread context of 3380	2780	chkdsk.exe	56

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rPO00299436pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chkdsk.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

pid	Process
2208	svchost.exe
2208	svchost.exe
2208	svchost.exe
2208	svchost.exe
2208	svchost.exe
2208	svchost.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe
2780	chkdsk.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
4776	rPO00299436pdf.exe
2208	svchost.exe
2208	svchost.exe
2208	svchost.exe
2208	svchost.exe
2780	chkdsk.exe
2780	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2208	svchost.exe
Token: SeDebugPrivilege	2780	chkdsk.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4776	rPO00299436pdf.exe
4776	rPO00299436pdf.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4776	rPO00299436pdf.exe
4776	rPO00299436pdf.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3380	Explorer.EXE

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4776 wrote to memory of 2208	4776	rPO00299436pdf.exe	86
PID 4776 wrote to memory of 2208	4776	rPO00299436pdf.exe	86
PID 4776 wrote to memory of 2208	4776	rPO00299436pdf.exe	86
PID 4776 wrote to memory of 2208	4776	rPO00299436pdf.exe	86
PID 3380 wrote to memory of 2780	3380	Explorer.EXE	90
PID 3380 wrote to memory of 2780	3380	Explorer.EXE	90
PID 3380 wrote to memory of 2780	3380	Explorer.EXE	90
PID 2780 wrote to memory of 3920	2780	chkdsk.exe	91
PID 2780 wrote to memory of 3920	2780	chkdsk.exe	91
PID 2780 wrote to memory of 3920	2780	chkdsk.exe	91

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3380
- C:\Users\Admin\AppData\Local\Temp\rPO00299436pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\rPO00299436pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4776
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\rPO00299436pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2208
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2208-19-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2208-15-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2208-16-0x0000000001FD0000-0x0000000001FE4000-memory.dmp

Filesize
80KB

Download
memory/2208-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2208-20-0x0000000003960000-0x0000000003974000-memory.dmp

Filesize
80KB

Download
memory/2208-13-0x0000000001B00000-0x0000000001E4A000-memory.dmp

Filesize
3.3MB

Download
memory/2780-25-0x00000000005C0000-0x00000000005EF000-memory.dmp

Filesize
188KB

Download
memory/2780-24-0x0000000000780000-0x000000000078A000-memory.dmp

Filesize
40KB

Download
memory/2780-23-0x0000000000780000-0x000000000078A000-memory.dmp

Filesize
40KB

Download
memory/3380-17-0x0000000008800000-0x0000000008933000-memory.dmp

Filesize
1.2MB

Download
memory/3380-21-0x0000000008D60000-0x0000000008EDC000-memory.dmp

Filesize
1.5MB

Download
memory/3380-22-0x0000000008800000-0x0000000008933000-memory.dmp

Filesize
1.2MB

Download
memory/3380-26-0x0000000008D60000-0x0000000008EDC000-memory.dmp

Filesize
1.5MB

Download
memory/3380-29-0x0000000008EE0000-0x0000000009043000-memory.dmp

Filesize
1.4MB

Download
memory/3380-30-0x0000000008EE0000-0x0000000009043000-memory.dmp

Filesize
1.4MB

Download
memory/3380-32-0x0000000008EE0000-0x0000000009043000-memory.dmp

Filesize
1.4MB

Download
memory/4776-11-0x0000000000C40000-0x0000000001040000-memory.dmp

Filesize
4.0MB

Download