formbook | fd4201668cc230dca3ada4023264462745d786fdf81c4547cc41ef291fda318f

General

Target

REQUEST URGENT INQUIRY Order No. BCM #03122020.docx
Size

10KB
MD5

cbe2bf1df01f128648e5fb90bb3f3c5f
SHA1

8917dd86f3c03bb10a4df45ef6a1bf012e10a897
SHA256

fd4201668cc230dca3ada4023264462745d786fdf81c4547cc41ef291fda318f
SHA512

8afc7de3a0d5659eecca7490a61c6963789d1d27bda501401242c8b58b333febf3be8efba609737188c2319043b6d0366bb7a54a5f8c2b5fb91840854b4f54da

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.rocketschool.net/nf2/

Decoy

avlholisticdentalcare.com

coolermassmedia.com

anythingneverything.net

maimaixiu.club

veyconcorp.com

rplelectro.com

koch-mannes.club

tecknetpro.com

getresurface.net

mertzengin.com

nbppfanzgn.com

508hill.com

ourdailydelights.com

aimeesambayan.com

productstoredt.com

doublelblonghorns.com

lucidcurriculum.com

thegoddessnow.com

qywqmjku.icu

yonibymina.com

Signatures

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

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1160-81-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1160-82-0x000000000041EB30-mapping.dmp	formbook
behavioral1/memory/1640-91-0x0000000000080000-0x00000000000AE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

10 1848 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 3 IoCs

Processes:

vbc.exevbc.exevbc.exe

pid process

752 vbc.exe
916 vbc.exe
1160 vbc.exe

flow	pid	process
10	1848	EQNEDT32.EXE

pid	process
752	vbc.exe
916	vbc.exe
1160	vbc.exe

Abuses OpenXML format to download file from external location 2 IoCs

Processes:

WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Key opened	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Office\Common\Offline\Files\http://37.120.206.70/dom/d.wbk	WINWORD.EXE

Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1848 EQNEDT32.EXE
1848 EQNEDT32.EXE
1848 EQNEDT32.EXE
1848 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1848	EQNEDT32.EXE
1848	EQNEDT32.EXE
1848	EQNEDT32.EXE
1848	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.execmd.exe

description	pid	process	target process
PID 752 set thread context of 1160	752	vbc.exe	vbc.exe
PID 1160 set thread context of 1208	1160	vbc.exe	Explorer.EXE
PID 1640 set thread context of 1208	1640	cmd.exe	Explorer.EXE

Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present
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

Processes:

EQNEDT32.EXE

pid process

1848 EQNEDT32.EXE

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

pid	process
1848	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1948 WINWORD.EXE
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

vbc.exevbc.execmd.exe

pid process

752 vbc.exe
752 vbc.exe
752 vbc.exe
1160 vbc.exe
1160 vbc.exe
1640 cmd.exe
1640 cmd.exe
1640 cmd.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.execmd.exe

pid process

1160 vbc.exe
1160 vbc.exe
1160 vbc.exe
1640 cmd.exe
1640 cmd.exe

pid	process
1948	WINWORD.EXE

pid	process
752	vbc.exe
752	vbc.exe
752	vbc.exe
1160	vbc.exe
1160	vbc.exe
1640	cmd.exe
1640	cmd.exe
1640	cmd.exe

pid	process
1208	Explorer.EXE

pid	process
1160	vbc.exe
1160	vbc.exe
1160	vbc.exe
1640	cmd.exe
1640	cmd.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

WINWORD.EXEvbc.exevbc.execmd.exe

description	pid	process
Token: SeShutdownPrivilege	1948	WINWORD.EXE
Token: SeDebugPrivilege	752	vbc.exe
Token: SeDebugPrivilege	1160	vbc.exe
Token: SeDebugPrivilege	1640	cmd.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1948 WINWORD.EXE
1948 WINWORD.EXE

pid	process
1948	WINWORD.EXE
1948	WINWORD.EXE

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEvbc.exeExplorer.EXEcmd.exe

description	pid	process	target process
PID 1848 wrote to memory of 752	1848	EQNEDT32.EXE	vbc.exe
PID 1848 wrote to memory of 752	1848	EQNEDT32.EXE	vbc.exe
PID 1848 wrote to memory of 752	1848	EQNEDT32.EXE	vbc.exe
PID 1848 wrote to memory of 752	1848	EQNEDT32.EXE	vbc.exe
PID 1948 wrote to memory of 1040	1948	WINWORD.EXE	splwow64.exe
PID 1948 wrote to memory of 1040	1948	WINWORD.EXE	splwow64.exe
PID 1948 wrote to memory of 1040	1948	WINWORD.EXE	splwow64.exe
PID 1948 wrote to memory of 1040	1948	WINWORD.EXE	splwow64.exe
PID 752 wrote to memory of 916	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 916	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 916	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 916	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 1160	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 1160	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 1160	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 1160	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 1160	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 1160	752	vbc.exe	vbc.exe
PID 752 wrote to memory of 1160	752	vbc.exe	vbc.exe
PID 1208 wrote to memory of 1640	1208	Explorer.EXE	cmd.exe
PID 1208 wrote to memory of 1640	1208	Explorer.EXE	cmd.exe
PID 1208 wrote to memory of 1640	1208	Explorer.EXE	cmd.exe
PID 1208 wrote to memory of 1640	1208	Explorer.EXE	cmd.exe
PID 1640 wrote to memory of 1676	1640	cmd.exe	cmd.exe
PID 1640 wrote to memory of 1676	1640	cmd.exe	cmd.exe
PID 1640 wrote to memory of 1676	1640	cmd.exe	cmd.exe
PID 1640 wrote to memory of 1676	1640	cmd.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1208

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\REQUEST URGENT INQUIRY Order No. BCM #03122020.docx"
2⤵
- Abuses OpenXML format to download file from external location
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1948

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
3⤵
PID:1040

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1552

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\SysWOW64\cmd.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1640

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1676

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
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1848

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:752

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
PID:916

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1160

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
caa1077d03ee5522c9f29ffce8551b0e

SHA1
7d4d49495ff71e244a85916fb64915a34b1ba67c

SHA256
9577374f647802bfb3e6c06622895af1d2bd19d3b4b0cdbefa807c64f6022c04

SHA512
50f0b75a7de213275afe2746dfbe969b7ef903552cbe0596154437b8711e4f079f0054618bcd6771a553980173c7878debb4cb8a568950fef4e39390efdb2cd0

Download Submit
C:\Users\Public\vbc.exe
MD5
caa1077d03ee5522c9f29ffce8551b0e

SHA1
7d4d49495ff71e244a85916fb64915a34b1ba67c

SHA256
9577374f647802bfb3e6c06622895af1d2bd19d3b4b0cdbefa807c64f6022c04

SHA512
50f0b75a7de213275afe2746dfbe969b7ef903552cbe0596154437b8711e4f079f0054618bcd6771a553980173c7878debb4cb8a568950fef4e39390efdb2cd0

Download Submit
C:\Users\Public\vbc.exe
MD5
caa1077d03ee5522c9f29ffce8551b0e

SHA1
7d4d49495ff71e244a85916fb64915a34b1ba67c

SHA256
9577374f647802bfb3e6c06622895af1d2bd19d3b4b0cdbefa807c64f6022c04

SHA512
50f0b75a7de213275afe2746dfbe969b7ef903552cbe0596154437b8711e4f079f0054618bcd6771a553980173c7878debb4cb8a568950fef4e39390efdb2cd0

Download Submit
C:\Users\Public\vbc.exe
MD5
caa1077d03ee5522c9f29ffce8551b0e

SHA1
7d4d49495ff71e244a85916fb64915a34b1ba67c

SHA256
9577374f647802bfb3e6c06622895af1d2bd19d3b4b0cdbefa807c64f6022c04

SHA512
50f0b75a7de213275afe2746dfbe969b7ef903552cbe0596154437b8711e4f079f0054618bcd6771a553980173c7878debb4cb8a568950fef4e39390efdb2cd0

Download Submit
\Users\Public\vbc.exe
MD5
caa1077d03ee5522c9f29ffce8551b0e

SHA1
7d4d49495ff71e244a85916fb64915a34b1ba67c

SHA256
9577374f647802bfb3e6c06622895af1d2bd19d3b4b0cdbefa807c64f6022c04

SHA512
50f0b75a7de213275afe2746dfbe969b7ef903552cbe0596154437b8711e4f079f0054618bcd6771a553980173c7878debb4cb8a568950fef4e39390efdb2cd0

Download Submit
\Users\Public\vbc.exe
MD5
caa1077d03ee5522c9f29ffce8551b0e

SHA1
7d4d49495ff71e244a85916fb64915a34b1ba67c

SHA256
9577374f647802bfb3e6c06622895af1d2bd19d3b4b0cdbefa807c64f6022c04

SHA512
50f0b75a7de213275afe2746dfbe969b7ef903552cbe0596154437b8711e4f079f0054618bcd6771a553980173c7878debb4cb8a568950fef4e39390efdb2cd0

Download Submit
\Users\Public\vbc.exe
MD5
caa1077d03ee5522c9f29ffce8551b0e

SHA1
7d4d49495ff71e244a85916fb64915a34b1ba67c

SHA256
9577374f647802bfb3e6c06622895af1d2bd19d3b4b0cdbefa807c64f6022c04

SHA512
50f0b75a7de213275afe2746dfbe969b7ef903552cbe0596154437b8711e4f079f0054618bcd6771a553980173c7878debb4cb8a568950fef4e39390efdb2cd0

Download Submit
\Users\Public\vbc.exe
MD5
caa1077d03ee5522c9f29ffce8551b0e

SHA1
7d4d49495ff71e244a85916fb64915a34b1ba67c

SHA256
9577374f647802bfb3e6c06622895af1d2bd19d3b4b0cdbefa807c64f6022c04

SHA512
50f0b75a7de213275afe2746dfbe969b7ef903552cbe0596154437b8711e4f079f0054618bcd6771a553980173c7878debb4cb8a568950fef4e39390efdb2cd0

Download Submit
memory/752-68-0x0000000000000000-mapping.dmp

Download
memory/752-78-0x0000000004DD0000-0x0000000004E49000-memory.dmp

Filesize
484KB

Download
memory/752-79-0x00000000008A0000-0x00000000008D7000-memory.dmp

Filesize
220KB

Download
memory/752-71-0x00000000009D0000-0x00000000009D1000-memory.dmp

Filesize
4KB

Download
memory/752-75-0x0000000000680000-0x0000000000694000-memory.dmp

Filesize
80KB

Download
memory/752-76-0x0000000004D90000-0x0000000004D91000-memory.dmp

Filesize
4KB

Download
memory/1040-73-0x0000000000000000-mapping.dmp

Download
memory/1040-74-0x000007FEFB7B1000-0x000007FEFB7B3000-memory.dmp

Filesize
8KB

Download
memory/1160-86-0x0000000000190000-0x00000000001A4000-memory.dmp

Filesize
80KB

Download
memory/1160-81-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1160-85-0x0000000000AF0000-0x0000000000DF3000-memory.dmp

Filesize
3.0MB

Download
memory/1160-82-0x000000000041EB30-mapping.dmp

Download
memory/1208-87-0x0000000006150000-0x00000000062FA000-memory.dmp

Filesize
1.7MB

Download
memory/1208-94-0x00000000044A0000-0x0000000004587000-memory.dmp

Filesize
924KB

Download
memory/1640-88-0x0000000000000000-mapping.dmp

Download
memory/1640-90-0x000000004A030000-0x000000004A07C000-memory.dmp

Filesize
304KB

Download
memory/1640-91-0x0000000000080000-0x00000000000AE000-memory.dmp

Filesize
184KB

Download
memory/1640-92-0x0000000002100000-0x0000000002403000-memory.dmp

Filesize
3.0MB

Download
memory/1640-93-0x0000000001E30000-0x0000000001EC3000-memory.dmp

Filesize
588KB

Download
memory/1676-89-0x0000000000000000-mapping.dmp

Download
memory/1848-63-0x0000000075511000-0x0000000075513000-memory.dmp

Filesize
8KB

Download
memory/1948-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1948-61-0x000000006FD31000-0x000000006FD33000-memory.dmp

Filesize
8KB

Download
memory/1948-60-0x00000000722B1000-0x00000000722B4000-memory.dmp

Filesize
12KB

Download
memory/1948-77-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads