formbook | 912c691be61c217574cd5f37c83dda7eaf696427bc278e29e257f4e55e95a4c5

General

Target

Arrival notice.xlsx
Size

1.4MB
MD5

75048d6eb28c8c180ed6adbb7b97e045
SHA1

7d86a5a15b22f53edb166d96edc87526256e167e
SHA256

912c691be61c217574cd5f37c83dda7eaf696427bc278e29e257f4e55e95a4c5
SHA512

b535e75c95ebfeb473158175c7443960cd0440cb4576ebaf3a330efe6b5cbf11d1421d17e3db68d3643344d827fdf0f4366dad9434c0f1b4f71ad9600038df04

Score

10^/10

formbook xloader loader rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.classifoods.com/oean/

Decoy

keboate.club

whitehatiq.com

loimtech.com

icaroagencia.com

snigglez.com

noreservationsxpress.com

villacascabel.com

5037adairway.com

growingequity.fund

stafffully.com

bingent.info

tmssaleguarantee.com

neonatalfeedrates.com

george-beauty.com

oraghallaighjourney.net

zunutrition.com

sylkysmooveentertainment.com

ddmns6tzey2d.com

dvcstay.com

304shaughnessygreen.info

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1728-16-0x0000000000400000-0x0000000000428000-memory.dmp	xloader
behavioral1/memory/1728-17-0x000000000041CFE0-mapping.dmp	xloader
behavioral1/memory/1712-20-0x0000000000000000-mapping.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 2012 EQNEDT32.EXE
Executes dropped EXE 3 IoCs

Processes:

vbc.exevbc.exevbc.exe

pid process

880 vbc.exe
1716 vbc.exe
1728 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

2012 EQNEDT32.EXE
2012 EQNEDT32.EXE
2012 EQNEDT32.EXE
2012 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	2012	EQNEDT32.EXE

pid	process
2012	EQNEDT32.EXE
2012	EQNEDT32.EXE
2012	EQNEDT32.EXE
2012	EQNEDT32.EXE

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.exesystray.exe

description	pid	process	target process
PID 880 set thread context of 1728	880	vbc.exe	vbc.exe
PID 1728 set thread context of 1232	1728	vbc.exe	Explorer.EXE
PID 1728 set thread context of 1232	1728	vbc.exe	Explorer.EXE
PID 1712 set thread context of 1232	1712	systray.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

2012 EQNEDT32.EXE

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

pid	process
2012	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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1748 EXCEL.EXE

pid	process
1748	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

vbc.exevbc.exesystray.exe

pid	process
880	vbc.exe
880	vbc.exe
1728	vbc.exe
1728	vbc.exe
1728	vbc.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe
1712	systray.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.exesystray.exe

pid process

1728 vbc.exe
1728 vbc.exe
1728 vbc.exe
1728 vbc.exe
1712 systray.exe
1712 systray.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vbc.exevbc.exesystray.exe

description pid process

Token: SeDebugPrivilege 880 vbc.exe
Token: SeDebugPrivilege 1728 vbc.exe
Token: SeDebugPrivilege 1712 systray.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1232 Explorer.EXE
1232 Explorer.EXE
1232 Explorer.EXE
1232 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1232 Explorer.EXE
1232 Explorer.EXE
1232 Explorer.EXE
1232 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1748 EXCEL.EXE
1748 EXCEL.EXE
1748 EXCEL.EXE

pid	process
1728	vbc.exe
1728	vbc.exe
1728	vbc.exe
1728	vbc.exe
1712	systray.exe
1712	systray.exe

description	pid	process
Token: SeDebugPrivilege	880	vbc.exe
Token: SeDebugPrivilege	1728	vbc.exe
Token: SeDebugPrivilege	1712	systray.exe

pid	process
1232	Explorer.EXE
1232	Explorer.EXE
1232	Explorer.EXE
1232	Explorer.EXE

pid	process
1232	Explorer.EXE
1232	Explorer.EXE
1232	Explorer.EXE
1232	Explorer.EXE

pid	process
1748	EXCEL.EXE
1748	EXCEL.EXE
1748	EXCEL.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEsystray.exe

description	pid	process	target process
PID 2012 wrote to memory of 880	2012	EQNEDT32.EXE	vbc.exe
PID 2012 wrote to memory of 880	2012	EQNEDT32.EXE	vbc.exe
PID 2012 wrote to memory of 880	2012	EQNEDT32.EXE	vbc.exe
PID 2012 wrote to memory of 880	2012	EQNEDT32.EXE	vbc.exe
PID 880 wrote to memory of 1716	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1716	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1716	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1716	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1728	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1728	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1728	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1728	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1728	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1728	880	vbc.exe	vbc.exe
PID 880 wrote to memory of 1728	880	vbc.exe	vbc.exe
PID 1232 wrote to memory of 1712	1232	Explorer.EXE	systray.exe
PID 1232 wrote to memory of 1712	1232	Explorer.EXE	systray.exe
PID 1232 wrote to memory of 1712	1232	Explorer.EXE	systray.exe
PID 1232 wrote to memory of 1712	1232	Explorer.EXE	systray.exe
PID 1712 wrote to memory of 396	1712	systray.exe	cmd.exe
PID 1712 wrote to memory of 396	1712	systray.exe	cmd.exe
PID 1712 wrote to memory of 396	1712	systray.exe	cmd.exe
PID 1712 wrote to memory of 396	1712	systray.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:1232

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\Arrival notice.xlsx"
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1748

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1596

C:\Windows\SysWOW64\systray.exe
"C:\Windows\SysWOW64\systray.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1712

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:396

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:2012

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:880

C:\Users\Public\vbc.exe
"{path}"
3⤵
- Executes dropped EXE
PID:1716

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:1728

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

Scripting

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
c1a46cb393041dbeb3aa1355d76232c7

SHA1
f2573d8ae24aa2a4a24e6a3ed6170cdd29658211

SHA256
e49c51a6864bf50e27baca58c5a2420046cae1803c5e0338af152b50d0dcc215

SHA512
f6fe4d189141e7f0f867f1fdc55211c36ac810d290d84e8fa42b74e22a956e77b23f35f7c92040618c9e74028d197ca1045b033cfe15a099c5dcc22d92f7b076

Download Submit
C:\Users\Public\vbc.exe
MD5
c1a46cb393041dbeb3aa1355d76232c7

SHA1
f2573d8ae24aa2a4a24e6a3ed6170cdd29658211

SHA256
e49c51a6864bf50e27baca58c5a2420046cae1803c5e0338af152b50d0dcc215

SHA512
f6fe4d189141e7f0f867f1fdc55211c36ac810d290d84e8fa42b74e22a956e77b23f35f7c92040618c9e74028d197ca1045b033cfe15a099c5dcc22d92f7b076

Download Submit
C:\Users\Public\vbc.exe
MD5
c1a46cb393041dbeb3aa1355d76232c7

SHA1
f2573d8ae24aa2a4a24e6a3ed6170cdd29658211

SHA256
e49c51a6864bf50e27baca58c5a2420046cae1803c5e0338af152b50d0dcc215

SHA512
f6fe4d189141e7f0f867f1fdc55211c36ac810d290d84e8fa42b74e22a956e77b23f35f7c92040618c9e74028d197ca1045b033cfe15a099c5dcc22d92f7b076

Download Submit
C:\Users\Public\vbc.exe
MD5
c1a46cb393041dbeb3aa1355d76232c7

SHA1
f2573d8ae24aa2a4a24e6a3ed6170cdd29658211

SHA256
e49c51a6864bf50e27baca58c5a2420046cae1803c5e0338af152b50d0dcc215

SHA512
f6fe4d189141e7f0f867f1fdc55211c36ac810d290d84e8fa42b74e22a956e77b23f35f7c92040618c9e74028d197ca1045b033cfe15a099c5dcc22d92f7b076

Download Submit
\Users\Public\vbc.exe
MD5
c1a46cb393041dbeb3aa1355d76232c7

SHA1
f2573d8ae24aa2a4a24e6a3ed6170cdd29658211

SHA256
e49c51a6864bf50e27baca58c5a2420046cae1803c5e0338af152b50d0dcc215

SHA512
f6fe4d189141e7f0f867f1fdc55211c36ac810d290d84e8fa42b74e22a956e77b23f35f7c92040618c9e74028d197ca1045b033cfe15a099c5dcc22d92f7b076

Download Submit
\Users\Public\vbc.exe
MD5
c1a46cb393041dbeb3aa1355d76232c7

SHA1
f2573d8ae24aa2a4a24e6a3ed6170cdd29658211

SHA256
e49c51a6864bf50e27baca58c5a2420046cae1803c5e0338af152b50d0dcc215

SHA512
f6fe4d189141e7f0f867f1fdc55211c36ac810d290d84e8fa42b74e22a956e77b23f35f7c92040618c9e74028d197ca1045b033cfe15a099c5dcc22d92f7b076

Download Submit
\Users\Public\vbc.exe
MD5
c1a46cb393041dbeb3aa1355d76232c7

SHA1
f2573d8ae24aa2a4a24e6a3ed6170cdd29658211

SHA256
e49c51a6864bf50e27baca58c5a2420046cae1803c5e0338af152b50d0dcc215

SHA512
f6fe4d189141e7f0f867f1fdc55211c36ac810d290d84e8fa42b74e22a956e77b23f35f7c92040618c9e74028d197ca1045b033cfe15a099c5dcc22d92f7b076

Download Submit
\Users\Public\vbc.exe
MD5
c1a46cb393041dbeb3aa1355d76232c7

SHA1
f2573d8ae24aa2a4a24e6a3ed6170cdd29658211

SHA256
e49c51a6864bf50e27baca58c5a2420046cae1803c5e0338af152b50d0dcc215

SHA512
f6fe4d189141e7f0f867f1fdc55211c36ac810d290d84e8fa42b74e22a956e77b23f35f7c92040618c9e74028d197ca1045b033cfe15a099c5dcc22d92f7b076

Download Submit
memory/396-22-0x0000000000000000-mapping.dmp

Download
memory/880-7-0x0000000000000000-mapping.dmp

Download
memory/880-13-0x0000000000440000-0x000000000044E000-memory.dmp

Filesize
56KB

Download
memory/880-14-0x0000000000610000-0x000000000068B000-memory.dmp

Filesize
492KB

Download
memory/880-11-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

Filesize
4KB

Download
memory/880-10-0x000000006C050000-0x000000006C73E000-memory.dmp

Filesize
6.9MB

Download
memory/1232-19-0x00000000042B0000-0x00000000043B3000-memory.dmp

Filesize
1.0MB

Download
memory/1712-20-0x0000000000000000-mapping.dmp

Download
memory/1712-21-0x0000000000FF0000-0x0000000000FF5000-memory.dmp

Filesize
20KB

Download
memory/1712-23-0x0000000004960000-0x0000000004AD6000-memory.dmp

Filesize
1.5MB

Download
memory/1728-16-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1728-17-0x000000000041CFE0-mapping.dmp

Download
memory/1812-2-0x000007FEF7040000-0x000007FEF72BA000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads