formbook | 161e3b6200af955772e00be88646b3c6332faca2e9867eedd9c41cc5a1b62876

General

Target

RFQ # PC25-1301.xlsx
Size

1.8MB
MD5

0792874afc518221f07574f95f43f5ef
SHA1

a4d7f0552e1fff852db8b27e1409bdbf4bc46244
SHA256

161e3b6200af955772e00be88646b3c6332faca2e9867eedd9c41cc5a1b62876
SHA512

67896688ea410a2af33d3936dbf913e6b1941f826dc40cbe1bf29f96a0b8dc4b1595f7d1e74738de2bc891006f3327616a7f607d0adc077d62ac4a380f3e1d5b
SSDEEP

49152:kTiDS2iZYJTg+uFfcdD+3GkdQFzhccnYmmAQd2:kmugO+6fV3GkdQdnhR

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/2736-16-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2804-22-0x0000000000090000-0x00000000000BF000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	2900	EQNEDT32.EXE

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
2752	word.exe

Loads dropped DLL 1 IoCs

pid	Process
2900	EQNEDT32.EXE

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0007000000015ff5-10.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2752 set thread context of 2736	2752	word.exe	34
PID 2736 set thread context of 1284	2736	svchost.exe	21
PID 2804 set thread context of 1284	2804	rundll32.exe	21

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	word.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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

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
2900	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1692	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2736	svchost.exe
2736	svchost.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe
2804	rundll32.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2752	word.exe
2736	svchost.exe
2736	svchost.exe
2736	svchost.exe
2804	rundll32.exe
2804	rundll32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	svchost.exe
Token: SeDebugPrivilege	2804	rundll32.exe
Token: SeShutdownPrivilege	1284	Explorer.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2752	word.exe
2752	word.exe
1284	Explorer.EXE
1284	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2752	word.exe
2752	word.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1692	EXCEL.EXE
1692	EXCEL.EXE
1692	EXCEL.EXE
1692	EXCEL.EXE

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 2752	2900	EQNEDT32.EXE	33
PID 2900 wrote to memory of 2752	2900	EQNEDT32.EXE	33
PID 2900 wrote to memory of 2752	2900	EQNEDT32.EXE	33
PID 2900 wrote to memory of 2752	2900	EQNEDT32.EXE	33
PID 2752 wrote to memory of 2736	2752	word.exe	34
PID 2752 wrote to memory of 2736	2752	word.exe	34
PID 2752 wrote to memory of 2736	2752	word.exe	34
PID 2752 wrote to memory of 2736	2752	word.exe	34
PID 2752 wrote to memory of 2736	2752	word.exe	34
PID 1284 wrote to memory of 2804	1284	Explorer.EXE	35
PID 1284 wrote to memory of 2804	1284	Explorer.EXE	35
PID 1284 wrote to memory of 2804	1284	Explorer.EXE	35
PID 1284 wrote to memory of 2804	1284	Explorer.EXE	35
PID 1284 wrote to memory of 2804	1284	Explorer.EXE	35
PID 1284 wrote to memory of 2804	1284	Explorer.EXE	35
PID 1284 wrote to memory of 2804	1284	Explorer.EXE	35
PID 2804 wrote to memory of 2784	2804	rundll32.exe	36
PID 2804 wrote to memory of 2784	2804	rundll32.exe	36
PID 2804 wrote to memory of 2784	2804	rundll32.exe	36
PID 2804 wrote to memory of 2784	2804	rundll32.exe	36

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1284
- 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\RFQ # PC25-1301.xlsx"
  2⤵
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:1692
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.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:2804
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2784

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:2900
- 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:2752
- - 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:2736

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

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

Filesize
1.7MB

MD5
00d95adc7ca2126d416fb70f2fae82f3

SHA1
363ec117e50cf867ba5b8b254eee2648d571466b

SHA256
7981d6c23a9624544c9610e2cfe5de81a0abfc9022efbd2ff0a514a7be98b93a

SHA512
d4d9c81b40aecb71e470c50f2f7d0a26a844d0a0dfc154f51684301d9466137a95df89e756c5732902e84a2a873f76c09b7e61c55ca4f5fc9b7538aaa3f4be8b

Download Submit
memory/1284-26-0x00000000052A0000-0x0000000005418000-memory.dmp

Filesize
1.5MB

Download
memory/1692-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1692-1-0x0000000072A7D000-0x0000000072A88000-memory.dmp

Filesize
44KB

Download
memory/1692-4-0x0000000072A7D000-0x0000000072A88000-memory.dmp

Filesize
44KB

Download
memory/2736-16-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2804-19-0x0000000000990000-0x000000000099E000-memory.dmp

Filesize
56KB

Download
memory/2804-21-0x0000000000990000-0x000000000099E000-memory.dmp

Filesize
56KB

Download
memory/2804-22-0x0000000000090000-0x00000000000BF000-memory.dmp

Filesize
188KB

Download

Analysis

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