formbook | 6561a6020bc0c8d2c73fb8bc45fc01236e14ea8f9ad3f997bd7fa426555fe289

General

Target

Original Inv_pdf.exe
Size

614KB
MD5

bd6899dcb7b367f8147f25c627750ec8
SHA1

bacbd00d9d8fd2925bc65e8b81b1dd56132fdc38
SHA256

7bea86a0a8eca333aadea84ecc083271d6a1b66fc226eb2000df79f69a5df4ce
SHA512

8630554e65283d6499ce4350e02bab47c22dcb7a01075439f3364b40a95723e4c9151e269ba558e58ad8c4b798d3b9254b2c75887809bd9cd9f85eef8df8cc5c
SSDEEP

12288:2uVCtZ6iSjzSebw1UjisRhzY2SzIvaWcoD0fiVfQ4XkRv+EN1d:2ESkhjhRhzY2SsvaWc7iVfQ4URv+a

Score

10^/10

formbook b31a discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

b31a

Decoy

enjamin-paaac.buzz

mail-marketing-40950.bond

pusems28-post.cyou

hindo.top

ruck-company-be.today

asinos-deutschland.net

ewancash.boats

etdopovo.casino

rcher-saaac.buzz

871166.vip

manuel.app

g3yqo.shop

-9way.xyz

qawgytfexe.bond

iefi6834.vip

ental-health-35901.bond

idat-merkez18.top

rojectleadzone.website

lirudolph.top

migloballlc.online

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2788-11-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2788-15-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2840-21-0x00000000000D0000-0x00000000000FF000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
2532	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2260 set thread context of 2788	2260	Original Inv_pdf.exe	30
PID 2788 set thread context of 1212	2788	Original Inv_pdf.exe	21
PID 2840 set thread context of 1212	2840	chkdsk.exe	21

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	Original Inv_pdf.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 31 IoCs

pid	Process
2260	Original Inv_pdf.exe
2260	Original Inv_pdf.exe
2788	Original Inv_pdf.exe
2788	Original Inv_pdf.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe
2840	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2788	Original Inv_pdf.exe
2788	Original Inv_pdf.exe
2788	Original Inv_pdf.exe
2840	chkdsk.exe
2840	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2260	Original Inv_pdf.exe
Token: SeDebugPrivilege	2788	Original Inv_pdf.exe
Token: SeDebugPrivilege	2840	chkdsk.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 2788	2260	Original Inv_pdf.exe	30
PID 2260 wrote to memory of 2788	2260	Original Inv_pdf.exe	30
PID 2260 wrote to memory of 2788	2260	Original Inv_pdf.exe	30
PID 2260 wrote to memory of 2788	2260	Original Inv_pdf.exe	30
PID 2260 wrote to memory of 2788	2260	Original Inv_pdf.exe	30
PID 2260 wrote to memory of 2788	2260	Original Inv_pdf.exe	30
PID 2260 wrote to memory of 2788	2260	Original Inv_pdf.exe	30
PID 1212 wrote to memory of 2840	1212	Explorer.EXE	31
PID 1212 wrote to memory of 2840	1212	Explorer.EXE	31
PID 1212 wrote to memory of 2840	1212	Explorer.EXE	31
PID 1212 wrote to memory of 2840	1212	Explorer.EXE	31
PID 2840 wrote to memory of 2532	2840	chkdsk.exe	32
PID 2840 wrote to memory of 2532	2840	chkdsk.exe	32
PID 2840 wrote to memory of 2532	2840	chkdsk.exe	32
PID 2840 wrote to memory of 2532	2840	chkdsk.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1212
- C:\Users\Admin\AppData\Local\Temp\Original Inv_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Original Inv_pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2260
- - C:\Users\Admin\AppData\Local\Temp\Original Inv_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Original Inv_pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2788
- 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:2840
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Original Inv_pdf.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2532

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/1212-17-0x0000000000300000-0x0000000000400000-memory.dmp

Filesize
1024KB

Download
memory/1212-22-0x0000000007960000-0x0000000007AD2000-memory.dmp

Filesize
1.4MB

Download
memory/1212-18-0x0000000007960000-0x0000000007AD2000-memory.dmp

Filesize
1.4MB

Download
memory/2260-5-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2260-12-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2260-0-0x000000007413E000-0x000000007413F000-memory.dmp

Filesize
4KB

Download
memory/2260-6-0x0000000004500000-0x0000000004576000-memory.dmp

Filesize
472KB

Download
memory/2260-1-0x00000000002F0000-0x000000000038E000-memory.dmp

Filesize
632KB

Download
memory/2260-4-0x000000007413E000-0x000000007413F000-memory.dmp

Filesize
4KB

Download
memory/2260-2-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2260-3-0x00000000009E0000-0x00000000009F0000-memory.dmp

Filesize
64KB

Download
memory/2788-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2788-13-0x0000000000A00000-0x0000000000D03000-memory.dmp

Filesize
3.0MB

Download
memory/2788-16-0x00000000002B0000-0x00000000002C4000-memory.dmp

Filesize
80KB

Download
memory/2788-15-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2788-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2788-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2788-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2840-19-0x0000000000900000-0x0000000000907000-memory.dmp

Filesize
28KB

Download
memory/2840-20-0x0000000000900000-0x0000000000907000-memory.dmp

Filesize
28KB

Download
memory/2840-21-0x00000000000D0000-0x00000000000FF000-memory.dmp

Filesize
188KB

Download

Analysis

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