formbook | 638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0

General

Target

638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe
Size

1.1MB
MD5

53af708104f6592c0491922d65ba4183
SHA1

12e1168a23d3a3b92b3fc4234ea1f3ab0151ba2a
SHA256

638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0
SHA512

69d391d4816d1e8a9c1e3a48e4cffc231187b6618b31e1d6a11bc34e65fe193ec1a1e1ddb977207ae0de94f6d7373921bbde8fbdae4572227f2222b59c5e8f53
SSDEEP

24576:Vu6J33O0c+JY5UZ+XC0kGso6Faz+mpj0BGPJerPPkii6WYb:3u0c++OCvkGs9Faz+MjgGMbsYb

Score

10^/10

formbook at22 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

at22

Decoy

etween-us.online

sphaleia.net

ental-implants-78350.bond

q4a.lat

commerce-97292.bond

linds-curtains-38811.bond

gyptevoyages.net

landofigueroa-abogados.net

cuitis.xyz

hantom.city

yzk.online

afikabmedan.store

ome-remodeling-67289.bond

ebpage-klzdxrhnazi.shop

eject.lol

rismart.xyz

nfluencer-marketing-72407.bond

ksolotl.xyz

ebsbayrntilrmizin93.xyz

pps-75399.bond

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/2412-7-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/2412-10-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/2412-14-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3556-20-0x0000000000A10000-0x0000000000A3F000-memory.dmp	formbook

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2324 set thread context of 2412	2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe	83
PID 2412 set thread context of 3464	2412	svchost.exe	56
PID 2412 set thread context of 3464	2412	svchost.exe	56
PID 3556 set thread context of 3464	3556	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	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chkdsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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 50 IoCs

pid	Process
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe
3556	chkdsk.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
3556	chkdsk.exe
3556	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2412	svchost.exe
Token: SeDebugPrivilege	3556	chkdsk.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe
2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe
2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 2412	2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe	83
PID 2324 wrote to memory of 2412	2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe	83
PID 2324 wrote to memory of 2412	2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe	83
PID 2324 wrote to memory of 2412	2324	638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe	83
PID 3464 wrote to memory of 3556	3464	Explorer.EXE	85
PID 3464 wrote to memory of 3556	3464	Explorer.EXE	85
PID 3464 wrote to memory of 3556	3464	Explorer.EXE	85
PID 3556 wrote to memory of 4896	3556	chkdsk.exe	86
PID 3556 wrote to memory of 4896	3556	chkdsk.exe	86
PID 3556 wrote to memory of 4896	3556	chkdsk.exe	86

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3464
- C:\Users\Admin\AppData\Local\Temp\638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe
  "C:\Users\Admin\AppData\Local\Temp\638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.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:2324
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\638a4b786fbb0e09168140311cfe7bdf63ddc5764d14e146633d9be28d6cf9f0.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2412
- 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:3556
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4896

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

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/2324-6-0x0000000000F00000-0x0000000001300000-memory.dmp

Filesize
4.0MB

Download
memory/2412-14-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2412-8-0x0000000001100000-0x000000000144A000-memory.dmp

Filesize
3.3MB

Download
memory/2412-11-0x0000000000FE0000-0x0000000000FF5000-memory.dmp

Filesize
84KB

Download
memory/2412-10-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2412-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2412-15-0x00000000015E0000-0x00000000015F5000-memory.dmp

Filesize
84KB

Download
memory/3464-17-0x0000000008AB0000-0x0000000008C19000-memory.dmp

Filesize
1.4MB

Download
memory/3464-16-0x00000000030E0000-0x000000000319E000-memory.dmp

Filesize
760KB

Download
memory/3464-12-0x0000000008AB0000-0x0000000008C19000-memory.dmp

Filesize
1.4MB

Download
memory/3464-21-0x00000000030E0000-0x000000000319E000-memory.dmp

Filesize
760KB

Download
memory/3464-24-0x0000000008E10000-0x0000000008F8F000-memory.dmp

Filesize
1.5MB

Download
memory/3464-26-0x0000000008E10000-0x0000000008F8F000-memory.dmp

Filesize
1.5MB

Download
memory/3464-27-0x0000000008E10000-0x0000000008F8F000-memory.dmp

Filesize
1.5MB

Download
memory/3556-18-0x00000000000E0000-0x00000000000EA000-memory.dmp

Filesize
40KB

Download
memory/3556-19-0x00000000000E0000-0x00000000000EA000-memory.dmp

Filesize
40KB

Download
memory/3556-20-0x0000000000A10000-0x0000000000A3F000-memory.dmp

Filesize
188KB

Download

Analysis

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