formbook | 1d4245f324118521fb7eb936379da4a25cb5101d5634f21376fa196663efdc35

General

Target

New -PO January.xlsx
Size

2.0MB
MD5

23bbc2d2c1f6938d9f701bd185ae52b8
SHA1

d90da454ef1ba74843356d00190b5232cf848b4f
SHA256

1d4245f324118521fb7eb936379da4a25cb5101d5634f21376fa196663efdc35
SHA512

5809706d71109adeee4f08980197b1dd7ced0f2dd584eff24a922749139241fc7b04323dfc54552e79cff4e75e77e554d15acbce3c14d96e69510acf17101311

Score

10^/10

formbook evasion rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.thesiromiel.com/kgw/

Decoy

valentinakasu.com

soyelmatador.com

collaborativeprosperity.com

power8brokers.com

nexus-ink.com

manpasandmeatmarket.com

the-ethical-forums.today

maryannpark.com

bikininbodymommy.com

pxwuo.com

bigbangmerch.com

okaysinger.com

shopcarpe.com

rainbowhillsswimclub.com

crifinmarket.com

ebl-play.net

forceandsonsequipment.com

viagraytqwi.com

latashashop.com

suffocatinglymundanepodcast.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/1708-16-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1708-17-0x000000000041EB70-mapping.dmp	formbook
behavioral1/memory/756-19-0x0000000000000000-mapping.dmp	formbook

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1896 EQNEDT32.EXE
Executes dropped EXE 3 IoCs

Processes:

vbc.exevbc.exevbc.exe

pid process

1536 vbc.exe
1480 vbc.exe
1708 vbc.exe
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

flow	pid	process
6	1896	EQNEDT32.EXE

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

vbc.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	vbc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	vbc.exe

Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1896 EQNEDT32.EXE
1896 EQNEDT32.EXE
1896 EQNEDT32.EXE
1896 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1896	EQNEDT32.EXE
1896	EQNEDT32.EXE
1896	EQNEDT32.EXE
1896	EQNEDT32.EXE

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

vbc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	vbc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	vbc.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.exehelp.exe

description	pid	process	target process
PID 1536 set thread context of 1708	1536	vbc.exe	vbc.exe
PID 1708 set thread context of 1260	1708	vbc.exe	Explorer.EXE
PID 1708 set thread context of 1260	1708	vbc.exe	Explorer.EXE
PID 756 set thread context of 1260	756	help.exe	Explorer.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

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

Processes:

EQNEDT32.EXE

pid process

1896 EQNEDT32.EXE

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

pid	process
1896	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1936 EXCEL.EXE

pid	process
1936	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

vbc.exevbc.exehelp.exe

pid	process
1536	vbc.exe
1536	vbc.exe
1708	vbc.exe
1708	vbc.exe
1708	vbc.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe
756	help.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.exehelp.exe

pid process

1708 vbc.exe
1708 vbc.exe
1708 vbc.exe
1708 vbc.exe
756 help.exe
756 help.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vbc.exevbc.exehelp.exe

description pid process

Token: SeDebugPrivilege 1536 vbc.exe
Token: SeDebugPrivilege 1708 vbc.exe
Token: SeDebugPrivilege 756 help.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1936 EXCEL.EXE
1936 EXCEL.EXE
1936 EXCEL.EXE

pid	process
1708	vbc.exe
1708	vbc.exe
1708	vbc.exe
1708	vbc.exe
756	help.exe
756	help.exe

description	pid	process
Token: SeDebugPrivilege	1536	vbc.exe
Token: SeDebugPrivilege	1708	vbc.exe
Token: SeDebugPrivilege	756	help.exe

pid	process
1936	EXCEL.EXE
1936	EXCEL.EXE
1936	EXCEL.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEhelp.exe

description	pid	process	target process
PID 1896 wrote to memory of 1536	1896	EQNEDT32.EXE	vbc.exe
PID 1896 wrote to memory of 1536	1896	EQNEDT32.EXE	vbc.exe
PID 1896 wrote to memory of 1536	1896	EQNEDT32.EXE	vbc.exe
PID 1896 wrote to memory of 1536	1896	EQNEDT32.EXE	vbc.exe
PID 1536 wrote to memory of 1480	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1480	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1480	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1480	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1708	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1708	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1708	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1708	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1708	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1708	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1708	1536	vbc.exe	vbc.exe
PID 1260 wrote to memory of 756	1260	Explorer.EXE	help.exe
PID 1260 wrote to memory of 756	1260	Explorer.EXE	help.exe
PID 1260 wrote to memory of 756	1260	Explorer.EXE	help.exe
PID 1260 wrote to memory of 756	1260	Explorer.EXE	help.exe
PID 756 wrote to memory of 368	756	help.exe	cmd.exe
PID 756 wrote to memory of 368	756	help.exe	cmd.exe
PID 756 wrote to memory of 368	756	help.exe	cmd.exe
PID 756 wrote to memory of 368	756	help.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1260

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\New -PO January.xlsx"
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1936

C:\Windows\SysWOW64\help.exe
"C:\Windows\SysWOW64\help.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:756

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:368

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:1896

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1536

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
PID:1480

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:1708

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

Virtualization/Sandbox Evasion

2

T1497

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

5

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
deed11e2b4b23dbe0c9ef99b5390bd6f

SHA1
158662003b5e63c1419267d5e8b0d4ce79e72081

SHA256
326090842ee6d692e02ae131a2003658939f60e79bceb7bad983cfe16400062f

SHA512
380a473f9e6ce25e5e68ac15794d1bcbe125a887067a48c258abb625b96080d90fad32cb860043af4b32d4d8afc84365726e4a861ec03976a6bec7651d3e0380

Download Submit
C:\Users\Public\vbc.exe
MD5
deed11e2b4b23dbe0c9ef99b5390bd6f

SHA1
158662003b5e63c1419267d5e8b0d4ce79e72081

SHA256
326090842ee6d692e02ae131a2003658939f60e79bceb7bad983cfe16400062f

SHA512
380a473f9e6ce25e5e68ac15794d1bcbe125a887067a48c258abb625b96080d90fad32cb860043af4b32d4d8afc84365726e4a861ec03976a6bec7651d3e0380

Download Submit
C:\Users\Public\vbc.exe
MD5
deed11e2b4b23dbe0c9ef99b5390bd6f

SHA1
158662003b5e63c1419267d5e8b0d4ce79e72081

SHA256
326090842ee6d692e02ae131a2003658939f60e79bceb7bad983cfe16400062f

SHA512
380a473f9e6ce25e5e68ac15794d1bcbe125a887067a48c258abb625b96080d90fad32cb860043af4b32d4d8afc84365726e4a861ec03976a6bec7651d3e0380

Download Submit
C:\Users\Public\vbc.exe
MD5
deed11e2b4b23dbe0c9ef99b5390bd6f

SHA1
158662003b5e63c1419267d5e8b0d4ce79e72081

SHA256
326090842ee6d692e02ae131a2003658939f60e79bceb7bad983cfe16400062f

SHA512
380a473f9e6ce25e5e68ac15794d1bcbe125a887067a48c258abb625b96080d90fad32cb860043af4b32d4d8afc84365726e4a861ec03976a6bec7651d3e0380

Download Submit
\Users\Public\vbc.exe
MD5
deed11e2b4b23dbe0c9ef99b5390bd6f

SHA1
158662003b5e63c1419267d5e8b0d4ce79e72081

SHA256
326090842ee6d692e02ae131a2003658939f60e79bceb7bad983cfe16400062f

SHA512
380a473f9e6ce25e5e68ac15794d1bcbe125a887067a48c258abb625b96080d90fad32cb860043af4b32d4d8afc84365726e4a861ec03976a6bec7651d3e0380

Download Submit
\Users\Public\vbc.exe
MD5
deed11e2b4b23dbe0c9ef99b5390bd6f

SHA1
158662003b5e63c1419267d5e8b0d4ce79e72081

SHA256
326090842ee6d692e02ae131a2003658939f60e79bceb7bad983cfe16400062f

SHA512
380a473f9e6ce25e5e68ac15794d1bcbe125a887067a48c258abb625b96080d90fad32cb860043af4b32d4d8afc84365726e4a861ec03976a6bec7651d3e0380

Download Submit
\Users\Public\vbc.exe
MD5
deed11e2b4b23dbe0c9ef99b5390bd6f

SHA1
158662003b5e63c1419267d5e8b0d4ce79e72081

SHA256
326090842ee6d692e02ae131a2003658939f60e79bceb7bad983cfe16400062f

SHA512
380a473f9e6ce25e5e68ac15794d1bcbe125a887067a48c258abb625b96080d90fad32cb860043af4b32d4d8afc84365726e4a861ec03976a6bec7651d3e0380

Download Submit
\Users\Public\vbc.exe
MD5
deed11e2b4b23dbe0c9ef99b5390bd6f

SHA1
158662003b5e63c1419267d5e8b0d4ce79e72081

SHA256
326090842ee6d692e02ae131a2003658939f60e79bceb7bad983cfe16400062f

SHA512
380a473f9e6ce25e5e68ac15794d1bcbe125a887067a48c258abb625b96080d90fad32cb860043af4b32d4d8afc84365726e4a861ec03976a6bec7651d3e0380

Download Submit
memory/368-21-0x0000000000000000-mapping.dmp

Download
memory/752-2-0x000007FEF6E90000-0x000007FEF710A000-memory.dmp

Filesize
2.5MB

Download
memory/756-22-0x00000000007D0000-0x000000000094E000-memory.dmp

Filesize
1.5MB

Download
memory/756-20-0x0000000000220000-0x0000000000226000-memory.dmp

Filesize
24KB

Download
memory/756-19-0x0000000000000000-mapping.dmp

Download
memory/1536-13-0x0000000000820000-0x0000000000832000-memory.dmp

Filesize
72KB

Download
memory/1536-14-0x00000000050D0000-0x000000000513F000-memory.dmp

Filesize
444KB

Download
memory/1536-11-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/1536-10-0x000000006B630000-0x000000006BD1E000-memory.dmp

Filesize
6.9MB

Download
memory/1536-7-0x0000000000000000-mapping.dmp

Download
memory/1708-16-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1708-17-0x000000000041EB70-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads