formbook | c4036ae358676bba732bcb78f6f2768b7076074dff7eec3a74d745dc065e58a5

General

Target

c4036ae358676bba732bcb78f6f2768b7076074dff7eec3a74d745dc065e58a5.xlsx
Size

1.8MB
MD5

c3955c311b951719d7ab4985314fbab0
SHA1

f48587590c94133e1f33f10b4da85c5ae151da09
SHA256

c4036ae358676bba732bcb78f6f2768b7076074dff7eec3a74d745dc065e58a5
SHA512

aeba2ac07f89ee650a169e15121c8bcd08cfe77ee5958cec0fe5bc59da27097318413900bfdd31a29e2c21756f19bfd5bc51dac01211cad75eeff1797121b858
SSDEEP

49152:yKHGYSIGQZnSCR0JfTfDZMsSdg3e8mr+0sUj:BHfSb7bZjD0su

Score

10^/10

formbook hwu6 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

hwu6

Decoy

lf758.vip

locerin-hair.shop

vytech.net

pet-insurance-intl-7990489.live

thepolithat.buzz

d66dr114gl.bond

suv-deals-49508.bond

job-offer-53922.bond

drstone1.click

lebahsemesta57.click

olmanihousel.shop

piedmontcsb.info

trisula888x.top

66sodovna.net

dental-implants-83810.bond

imxtld.club

frozenpines.net

ffgzgbl.xyz

tlc7z.rest

alexismuller.design

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral1/memory/1372-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2572-16-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	2260	EQNEDT32.EXE

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
2556	word.exe

Loads dropped DLL 1 IoCs

pid	Process
2260	EQNEDT32.EXE

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x00070000000167ea-6.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2556 set thread context of 1372	2556	word.exe	34
PID 1372 set thread context of 1144	1372	svchost.exe	20
PID 2572 set thread context of 1144	2572	wininit.exe	20

System Location Discovery: System Language Discovery 1 TTPs 5 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	wininit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	word.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2260	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2336	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
1372	svchost.exe
1372	svchost.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe
2572	wininit.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2556	word.exe
1372	svchost.exe
1372	svchost.exe
1372	svchost.exe
2572	wininit.exe
2572	wininit.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1372	svchost.exe
Token: SeDebugPrivilege	2572	wininit.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2556	word.exe
2556	word.exe
1144	Explorer.EXE
1144	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2556	word.exe
2556	word.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2336	EXCEL.EXE
2336	EXCEL.EXE
2336	EXCEL.EXE

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 2556	2260	EQNEDT32.EXE	33
PID 2260 wrote to memory of 2556	2260	EQNEDT32.EXE	33
PID 2260 wrote to memory of 2556	2260	EQNEDT32.EXE	33
PID 2260 wrote to memory of 2556	2260	EQNEDT32.EXE	33
PID 2556 wrote to memory of 1372	2556	word.exe	34
PID 2556 wrote to memory of 1372	2556	word.exe	34
PID 2556 wrote to memory of 1372	2556	word.exe	34
PID 2556 wrote to memory of 1372	2556	word.exe	34
PID 2556 wrote to memory of 1372	2556	word.exe	34
PID 1144 wrote to memory of 2572	1144	Explorer.EXE	35
PID 1144 wrote to memory of 2572	1144	Explorer.EXE	35
PID 1144 wrote to memory of 2572	1144	Explorer.EXE	35
PID 1144 wrote to memory of 2572	1144	Explorer.EXE	35
PID 2572 wrote to memory of 2836	2572	wininit.exe	36
PID 2572 wrote to memory of 2836	2572	wininit.exe	36
PID 2572 wrote to memory of 2836	2572	wininit.exe	36
PID 2572 wrote to memory of 2836	2572	wininit.exe	36

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
  "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\c4036ae358676bba732bcb78f6f2768b7076074dff7eec3a74d745dc065e58a5.xlsx
  2⤵
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:2336
- C:\Windows\SysWOW64\wininit.exe
  "C:\Windows\SysWOW64\wininit.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:2572
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2836

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2260
- C:\Users\Admin\AppData\Roaming\word.exe
  C:\Users\Admin\AppData\Roaming\word.exe
  2⤵
  - Executes dropped EXE
  - 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:2556
- - C:\Windows\SysWOW64\svchost.exe
    C:\Users\Admin\AppData\Roaming\word.exe
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Exploitation for Client Execution

1

T1203

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

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Downloads

\Users\Admin\AppData\Roaming\word.exe

Filesize
1.7MB

MD5
2691aa078c8eff65b38f3c0ca7f6762a

SHA1
ba445b8fbb17de03e4d6baf1fd8e3d6552e70c50

SHA256
8eddb8196477fb5ea33d35eb1be98c68c1ca60847a3e79043a25aee0dde889c0

SHA512
a2cd17eb6ad5de1e5e58823ce87082a8be8b47e9725343039b51d32467910d322dea73af0d6168e8ac5b27c7fc3f23319854850eb81457b187868ee4ca3ecb22

Download Submit
memory/1144-21-0x00000000067B0000-0x00000000068B4000-memory.dmp

Filesize
1.0MB

Download
memory/1372-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2336-1-0x00000000722FD000-0x0000000072308000-memory.dmp

Filesize
44KB

Download
memory/2336-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2336-17-0x00000000722FD000-0x0000000072308000-memory.dmp

Filesize
44KB

Download
memory/2572-15-0x0000000000FF0000-0x000000000100A000-memory.dmp

Filesize
104KB

Download
memory/2572-16-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

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Analysis

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