formbook | 874c6faee7e17445012c0f573c29dde997a71cc86e15fc3152a22365cf83bdf1

General

Target

DOC_PDF.exe
Size

597KB
MD5

debff2e29172e4c6b07a62a5d7b8a6b4
SHA1

6e2073a1f0dbd338f0a8673f35b8628581fac402
SHA256

874c6faee7e17445012c0f573c29dde997a71cc86e15fc3152a22365cf83bdf1
SHA512

565cccea3f2b0214e64e352a0676465c6b6792da5d7f77a9e97463c7ebb0fd8ab71baa835fa586268c425aa01577cf5ff5a3d7f652a9c1f6fb568757713b59f1
SSDEEP

12288:v0FSVDrE1Sytj7ueTw98NxmngEFTas9VdqJGQ/UUakA/k3Q8bQbZ:I1Sytj71LSdOqa4UakZTI

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/2884-11-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2884-15-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1944-21-0x00000000000D0000-0x00000000000FF000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
2968	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1992 set thread context of 2884	1992	DOC_PDF.exe	30
PID 2884 set thread context of 1212	2884	DOC_PDF.exe	21
PID 1944 set thread context of 1212	1944	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	DOC_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 30 IoCs

pid	Process
1992	DOC_PDF.exe
1992	DOC_PDF.exe
2884	DOC_PDF.exe
2884	DOC_PDF.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe
1944	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2884	DOC_PDF.exe
2884	DOC_PDF.exe
2884	DOC_PDF.exe
1944	chkdsk.exe
1944	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	DOC_PDF.exe
Token: SeDebugPrivilege	2884	DOC_PDF.exe
Token: SeDebugPrivilege	1944	chkdsk.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 2884	1992	DOC_PDF.exe	30
PID 1992 wrote to memory of 2884	1992	DOC_PDF.exe	30
PID 1992 wrote to memory of 2884	1992	DOC_PDF.exe	30
PID 1992 wrote to memory of 2884	1992	DOC_PDF.exe	30
PID 1992 wrote to memory of 2884	1992	DOC_PDF.exe	30
PID 1992 wrote to memory of 2884	1992	DOC_PDF.exe	30
PID 1992 wrote to memory of 2884	1992	DOC_PDF.exe	30
PID 1212 wrote to memory of 1944	1212	Explorer.EXE	31
PID 1212 wrote to memory of 1944	1212	Explorer.EXE	31
PID 1212 wrote to memory of 1944	1212	Explorer.EXE	31
PID 1212 wrote to memory of 1944	1212	Explorer.EXE	31
PID 1944 wrote to memory of 2968	1944	chkdsk.exe	32
PID 1944 wrote to memory of 2968	1944	chkdsk.exe	32
PID 1944 wrote to memory of 2968	1944	chkdsk.exe	32
PID 1944 wrote to memory of 2968	1944	chkdsk.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1212
- C:\Users\Admin\AppData\Local\Temp\DOC_PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\DOC_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:1992
- - C:\Users\Admin\AppData\Local\Temp\DOC_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\DOC_PDF.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2884
- 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:1944
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\DOC_PDF.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2968

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/1212-22-0x00000000042F0000-0x00000000043AB000-memory.dmp

Filesize
748KB

Download
memory/1212-17-0x0000000000010000-0x0000000000020000-memory.dmp

Filesize
64KB

Download
memory/1212-18-0x00000000042F0000-0x00000000043AB000-memory.dmp

Filesize
748KB

Download
memory/1944-19-0x0000000000F90000-0x0000000000F97000-memory.dmp

Filesize
28KB

Download
memory/1944-20-0x0000000000F90000-0x0000000000F97000-memory.dmp

Filesize
28KB

Download
memory/1944-21-0x00000000000D0000-0x00000000000FF000-memory.dmp

Filesize
188KB

Download
memory/1992-3-0x00000000004D0000-0x00000000004E2000-memory.dmp

Filesize
72KB

Download
memory/1992-6-0x0000000005070000-0x00000000050E6000-memory.dmp

Filesize
472KB

Download
memory/1992-5-0x00000000741A0000-0x000000007488E000-memory.dmp

Filesize
6.9MB

Download
memory/1992-4-0x00000000741AE000-0x00000000741AF000-memory.dmp

Filesize
4KB

Download
memory/1992-0-0x00000000741AE000-0x00000000741AF000-memory.dmp

Filesize
4KB

Download
memory/1992-12-0x00000000741A0000-0x000000007488E000-memory.dmp

Filesize
6.9MB

Download
memory/1992-2-0x00000000741A0000-0x000000007488E000-memory.dmp

Filesize
6.9MB

Download
memory/1992-1-0x0000000000130000-0x00000000001CC000-memory.dmp

Filesize
624KB

Download
memory/2884-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2884-15-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2884-16-0x00000000001F0000-0x0000000000204000-memory.dmp

Filesize
80KB

Download
memory/2884-13-0x0000000000970000-0x0000000000C73000-memory.dmp

Filesize
3.0MB

Download
memory/2884-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2884-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2884-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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