formbook | 624a702ccbc488c9702b2ff1f0e73a6606771837cd5a8516ccfd76f78fabab32

General

Target

2218003603 92390-00.xlsx
Size

1.3MB
MD5

1a3223dc142b11cb7e4a2e4c42d8ba99
SHA1

9fb84ca1ecd5c63b776f207923af1787ec64e0e9
SHA256

624a702ccbc488c9702b2ff1f0e73a6606771837cd5a8516ccfd76f78fabab32
SHA512

fa07df7dda909fa5f44142c769ac1412633217d3de5f543ece5fd3d2836348a13496748a0f8b8d2297802694eeb449be2b985ec461ac728ec29b03fe2764c6ab

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.theatomicshots.com/xle/

Decoy

tknbr.com

loyaloneconstruction.com

what-where.com

matebacapital.com

marriedandmore.com

qiemfsolutions.com

graececonsulting.com

www7456.com

littlefreecherokeelibrary.com

tailgatepawkinglot.com

musheet.com

tesfamariamtb.com

1728025.com

xceltechuae.com

harperandchloe.com

thepamperedbarber.com

5050alberta.com

supplychainstrainer.com

lacorte.group

ringingbear.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/2040-20-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/2040-21-0x000000000041EB90-mapping.dmp	formbook
behavioral1/memory/1692-31-0x0000000000080000-0x00000000000AE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1728 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

640 vbc.exe
2040 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1728 EQNEDT32.EXE
1728 EQNEDT32.EXE
1728 EQNEDT32.EXE
1728 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	1728	EQNEDT32.EXE

pid	process
640	vbc.exe
2040	vbc.exe

pid	process
1728	EQNEDT32.EXE
1728	EQNEDT32.EXE
1728	EQNEDT32.EXE
1728	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exeipconfig.exe

description	pid	process	target process
PID 640 set thread context of 2040	640	vbc.exe	vbc.exe
PID 2040 set thread context of 1236	2040	vbc.exe	Explorer.EXE
PID 1692 set thread context of 1236	1692	ipconfig.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
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

ipconfig.exe

pid process

1692 ipconfig.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

1728 EQNEDT32.EXE

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

pid	process
1692	ipconfig.exe

pid	process
1728	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\Toolbar\ShowDiscussionButton = "Yes"	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\E&xport to Microsoft Excel	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
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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1272 EXCEL.EXE

pid	process
1272	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

vbc.exeipconfig.exe

pid	process
2040	vbc.exe
2040	vbc.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe
1692	ipconfig.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.exeipconfig.exe

pid process

2040 vbc.exe
2040 vbc.exe
2040 vbc.exe
1692 ipconfig.exe
1692 ipconfig.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exeipconfig.exe

description pid process

Token: SeDebugPrivilege 2040 vbc.exe
Token: SeDebugPrivilege 1692 ipconfig.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1272 EXCEL.EXE
1272 EXCEL.EXE
1272 EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	2040	vbc.exe
Token: SeDebugPrivilege	1692	ipconfig.exe

pid	process
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1272	EXCEL.EXE
1272	EXCEL.EXE
1272	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEipconfig.exe

description	pid	process	target process
PID 1728 wrote to memory of 640	1728	EQNEDT32.EXE	vbc.exe
PID 1728 wrote to memory of 640	1728	EQNEDT32.EXE	vbc.exe
PID 1728 wrote to memory of 640	1728	EQNEDT32.EXE	vbc.exe
PID 1728 wrote to memory of 640	1728	EQNEDT32.EXE	vbc.exe
PID 640 wrote to memory of 2040	640	vbc.exe	vbc.exe
PID 640 wrote to memory of 2040	640	vbc.exe	vbc.exe
PID 640 wrote to memory of 2040	640	vbc.exe	vbc.exe
PID 640 wrote to memory of 2040	640	vbc.exe	vbc.exe
PID 640 wrote to memory of 2040	640	vbc.exe	vbc.exe
PID 640 wrote to memory of 2040	640	vbc.exe	vbc.exe
PID 640 wrote to memory of 2040	640	vbc.exe	vbc.exe
PID 1236 wrote to memory of 1692	1236	Explorer.EXE	ipconfig.exe
PID 1236 wrote to memory of 1692	1236	Explorer.EXE	ipconfig.exe
PID 1236 wrote to memory of 1692	1236	Explorer.EXE	ipconfig.exe
PID 1236 wrote to memory of 1692	1236	Explorer.EXE	ipconfig.exe
PID 1692 wrote to memory of 1480	1692	ipconfig.exe	cmd.exe
PID 1692 wrote to memory of 1480	1692	ipconfig.exe	cmd.exe
PID 1692 wrote to memory of 1480	1692	ipconfig.exe	cmd.exe
PID 1692 wrote to memory of 1480	1692	ipconfig.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1236

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\2218003603 92390-00.xlsx"
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1272

C:\Windows\SysWOW64\ipconfig.exe
"C:\Windows\SysWOW64\ipconfig.exe"
2⤵
- Suspicious use of SetThreadContext
- Gathers network information
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1692

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1480

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:1728

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:640

C:\Users\Public\vbc.exe
"{path}"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2040

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Command-Line Interface

1

T1059

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
df8503902c4c7ed20ed1f9e6f9783e75

SHA1
2e81fa37efc74062d61dba361fda88a6f60e19eb

SHA256
7fea4608a3f80e3b819a0564f80412183f772fed84f1323bcd7b931d1af4260a

SHA512
fb1c9933e2d4f6e5a18b23164ef6268cb5f65332544af2256dc2809507ea2153b9ecf20463da70719fef99a8e9e58ab4c19963410f5ab68f57be494c8558f16f

Download Submit
C:\Users\Public\vbc.exe
MD5
df8503902c4c7ed20ed1f9e6f9783e75

SHA1
2e81fa37efc74062d61dba361fda88a6f60e19eb

SHA256
7fea4608a3f80e3b819a0564f80412183f772fed84f1323bcd7b931d1af4260a

SHA512
fb1c9933e2d4f6e5a18b23164ef6268cb5f65332544af2256dc2809507ea2153b9ecf20463da70719fef99a8e9e58ab4c19963410f5ab68f57be494c8558f16f

Download Submit
C:\Users\Public\vbc.exe
MD5
df8503902c4c7ed20ed1f9e6f9783e75

SHA1
2e81fa37efc74062d61dba361fda88a6f60e19eb

SHA256
7fea4608a3f80e3b819a0564f80412183f772fed84f1323bcd7b931d1af4260a

SHA512
fb1c9933e2d4f6e5a18b23164ef6268cb5f65332544af2256dc2809507ea2153b9ecf20463da70719fef99a8e9e58ab4c19963410f5ab68f57be494c8558f16f

Download Submit
\Users\Public\vbc.exe
MD5
df8503902c4c7ed20ed1f9e6f9783e75

SHA1
2e81fa37efc74062d61dba361fda88a6f60e19eb

SHA256
7fea4608a3f80e3b819a0564f80412183f772fed84f1323bcd7b931d1af4260a

SHA512
fb1c9933e2d4f6e5a18b23164ef6268cb5f65332544af2256dc2809507ea2153b9ecf20463da70719fef99a8e9e58ab4c19963410f5ab68f57be494c8558f16f

Download Submit
\Users\Public\vbc.exe
MD5
df8503902c4c7ed20ed1f9e6f9783e75

SHA1
2e81fa37efc74062d61dba361fda88a6f60e19eb

SHA256
7fea4608a3f80e3b819a0564f80412183f772fed84f1323bcd7b931d1af4260a

SHA512
fb1c9933e2d4f6e5a18b23164ef6268cb5f65332544af2256dc2809507ea2153b9ecf20463da70719fef99a8e9e58ab4c19963410f5ab68f57be494c8558f16f

Download Submit
\Users\Public\vbc.exe
MD5
df8503902c4c7ed20ed1f9e6f9783e75

SHA1
2e81fa37efc74062d61dba361fda88a6f60e19eb

SHA256
7fea4608a3f80e3b819a0564f80412183f772fed84f1323bcd7b931d1af4260a

SHA512
fb1c9933e2d4f6e5a18b23164ef6268cb5f65332544af2256dc2809507ea2153b9ecf20463da70719fef99a8e9e58ab4c19963410f5ab68f57be494c8558f16f

Download Submit
\Users\Public\vbc.exe
MD5
df8503902c4c7ed20ed1f9e6f9783e75

SHA1
2e81fa37efc74062d61dba361fda88a6f60e19eb

SHA256
7fea4608a3f80e3b819a0564f80412183f772fed84f1323bcd7b931d1af4260a

SHA512
fb1c9933e2d4f6e5a18b23164ef6268cb5f65332544af2256dc2809507ea2153b9ecf20463da70719fef99a8e9e58ab4c19963410f5ab68f57be494c8558f16f

Download Submit
memory/640-17-0x0000000004DE0000-0x0000000004DE1000-memory.dmp

Filesize
4KB

Download
memory/640-11-0x0000000000000000-mapping.dmp

Download
memory/640-14-0x000000006C210000-0x000000006C8FE000-memory.dmp

Filesize
6.9MB

Download
memory/640-15-0x00000000012B0000-0x00000000012B1000-memory.dmp

Filesize
4KB

Download
memory/640-18-0x00000000003E0000-0x00000000003EE000-memory.dmp

Filesize
56KB

Download
memory/640-19-0x0000000001210000-0x0000000001269000-memory.dmp

Filesize
356KB

Download
memory/1236-26-0x0000000005000000-0x000000000518F000-memory.dmp

Filesize
1.6MB

Download
memory/1236-34-0x0000000004CC0000-0x0000000004DFF000-memory.dmp

Filesize
1.2MB

Download
memory/1272-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1272-2-0x000000002F8E1000-0x000000002F8E4000-memory.dmp

Filesize
12KB

Download
memory/1272-3-0x0000000071911000-0x0000000071913000-memory.dmp

Filesize
8KB

Download
memory/1480-29-0x0000000000000000-mapping.dmp

Download
memory/1496-6-0x000007FEF7EB0000-0x000007FEF812A000-memory.dmp

Filesize
2.5MB

Download
memory/1692-27-0x0000000000000000-mapping.dmp

Download
memory/1692-31-0x0000000000080000-0x00000000000AE000-memory.dmp

Filesize
184KB

Download
memory/1692-30-0x00000000005F0000-0x00000000005FA000-memory.dmp

Filesize
40KB

Download
memory/1692-32-0x00000000021E0000-0x00000000024E3000-memory.dmp

Filesize
3.0MB

Download
memory/1692-33-0x0000000000820000-0x00000000008B3000-memory.dmp

Filesize
588KB

Download
memory/1728-5-0x0000000076881000-0x0000000076883000-memory.dmp

Filesize
8KB

Download
memory/2040-25-0x0000000000450000-0x0000000000464000-memory.dmp

Filesize
80KB

Download
memory/2040-24-0x0000000000700000-0x0000000000A03000-memory.dmp

Filesize
3.0MB

Download
memory/2040-21-0x000000000041EB90-mapping.dmp

Download
memory/2040-20-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads