formbook | 70f35721eb13022a6ae320055bf74d8c3bf688d5cd04c3bea37f6c2e4886d1b3

General

Target

7426da962e68c5b20a5159ca4e911eee.rtf
Size

8KB
MD5

7426da962e68c5b20a5159ca4e911eee
SHA1

a3a37b190077a308a17ddb82aa545610807f6e8b
SHA256

70f35721eb13022a6ae320055bf74d8c3bf688d5cd04c3bea37f6c2e4886d1b3
SHA512

e4f398322e4d020efcecea06cd2b3f77c3ce19a62cb4ab983aa7cceb7f9a3a00036057fa9e3cbc31a135b2e241cf6fe9540e260dedc251d9ab92f3843ef991ae

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.yabo101games.net/dps/

Decoy

mediationgenie.com

top-endstrollers.com

nunxia.com

whitehorsestone.com

outdoorfurniturevn.com

linary1994.com

portlandsbestdopczeic.com

thespiritbankchecking.com

tannerzaharis.com

lolaelzein.net

wotulove.com

haasjustice.com

humanpossibilitiesfreed.com

libreo.club

xn--onegcio-o0a.com

mysticbali.com

ruhuxue.com

befashionbelts.online

gourmetgrazingplatters.com

basintechnologies.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/1796-78-0x000000000041EAC0-mapping.dmp	formbook
behavioral1/memory/1796-77-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/808-87-0x0000000000080000-0x00000000000AE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

7 2000 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

272 vbc.exe
1796 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

2000 EQNEDT32.EXE
2000 EQNEDT32.EXE
2000 EQNEDT32.EXE
2000 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
7	2000	EQNEDT32.EXE

pid	process
272	vbc.exe
1796	vbc.exe

pid	process
2000	EQNEDT32.EXE
2000	EQNEDT32.EXE
2000	EQNEDT32.EXE
2000	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exewlanext.exe

description	pid	process	target process
PID 272 set thread context of 1796	272	vbc.exe	vbc.exe
PID 1796 set thread context of 1220	1796	vbc.exe	Explorer.EXE
PID 808 set thread context of 1220	808	wlanext.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

2000 EQNEDT32.EXE

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

pid	process
2000	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 (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 (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
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\Toolbar	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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1348 WINWORD.EXE
Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

vbc.exevbc.exewlanext.exe

pid process

272 vbc.exe
272 vbc.exe
1796 vbc.exe
1796 vbc.exe
808 wlanext.exe
808 wlanext.exe
808 wlanext.exe
808 wlanext.exe
808 wlanext.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.exewlanext.exe

pid process

1796 vbc.exe
1796 vbc.exe
1796 vbc.exe
808 wlanext.exe
808 wlanext.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vbc.exevbc.exewlanext.exe

description pid process

Token: SeDebugPrivilege 272 vbc.exe
Token: SeDebugPrivilege 1796 vbc.exe
Token: SeDebugPrivilege 808 wlanext.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1348 WINWORD.EXE
1348 WINWORD.EXE

pid	process
1348	WINWORD.EXE

pid	process
272	vbc.exe
272	vbc.exe
1796	vbc.exe
1796	vbc.exe
808	wlanext.exe
808	wlanext.exe
808	wlanext.exe
808	wlanext.exe
808	wlanext.exe

pid	process
1220	Explorer.EXE

pid	process
1796	vbc.exe
1796	vbc.exe
1796	vbc.exe
808	wlanext.exe
808	wlanext.exe

description	pid	process
Token: SeDebugPrivilege	272	vbc.exe
Token: SeDebugPrivilege	1796	vbc.exe
Token: SeDebugPrivilege	808	wlanext.exe

pid	process
1348	WINWORD.EXE
1348	WINWORD.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEvbc.exeExplorer.EXEwlanext.exe

description	pid	process	target process
PID 2000 wrote to memory of 272	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 272	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 272	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 272	2000	EQNEDT32.EXE	vbc.exe
PID 1348 wrote to memory of 1608	1348	WINWORD.EXE	splwow64.exe
PID 1348 wrote to memory of 1608	1348	WINWORD.EXE	splwow64.exe
PID 1348 wrote to memory of 1608	1348	WINWORD.EXE	splwow64.exe
PID 1348 wrote to memory of 1608	1348	WINWORD.EXE	splwow64.exe
PID 272 wrote to memory of 1796	272	vbc.exe	vbc.exe
PID 272 wrote to memory of 1796	272	vbc.exe	vbc.exe
PID 272 wrote to memory of 1796	272	vbc.exe	vbc.exe
PID 272 wrote to memory of 1796	272	vbc.exe	vbc.exe
PID 272 wrote to memory of 1796	272	vbc.exe	vbc.exe
PID 272 wrote to memory of 1796	272	vbc.exe	vbc.exe
PID 272 wrote to memory of 1796	272	vbc.exe	vbc.exe
PID 1220 wrote to memory of 808	1220	Explorer.EXE	wlanext.exe
PID 1220 wrote to memory of 808	1220	Explorer.EXE	wlanext.exe
PID 1220 wrote to memory of 808	1220	Explorer.EXE	wlanext.exe
PID 1220 wrote to memory of 808	1220	Explorer.EXE	wlanext.exe
PID 808 wrote to memory of 1600	808	wlanext.exe	cmd.exe
PID 808 wrote to memory of 1600	808	wlanext.exe	cmd.exe
PID 808 wrote to memory of 1600	808	wlanext.exe	cmd.exe
PID 808 wrote to memory of 1600	808	wlanext.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1220

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\7426da962e68c5b20a5159ca4e911eee.rtf"
2⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1348

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
3⤵
PID:1608

C:\Windows\SysWOW64\wlanext.exe
"C:\Windows\SysWOW64\wlanext.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:808

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1600

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:2000

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:272

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:1796

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

Replay Monitor

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Downloads

C:\Users\Public\vbc.exe
MD5
faac2c95032da4670594905c19fa95f4

SHA1
d270eaa71182af2b438460e78f97c897e75861f5

SHA256
4750b53054697c5ff9a8b607efb24934d65e3ef64f53f8dd2035e3077b4b5aa8

SHA512
512da42dc48c0e125291b32b8e2211c569560df519ce7402c5af2d0c2f14d2cca31039020744964fa27a338df207d807a1f8ca7b8c86a383ba272de63296eaa1

Download Submit
C:\Users\Public\vbc.exe
MD5
faac2c95032da4670594905c19fa95f4

SHA1
d270eaa71182af2b438460e78f97c897e75861f5

SHA256
4750b53054697c5ff9a8b607efb24934d65e3ef64f53f8dd2035e3077b4b5aa8

SHA512
512da42dc48c0e125291b32b8e2211c569560df519ce7402c5af2d0c2f14d2cca31039020744964fa27a338df207d807a1f8ca7b8c86a383ba272de63296eaa1

Download Submit
C:\Users\Public\vbc.exe
MD5
faac2c95032da4670594905c19fa95f4

SHA1
d270eaa71182af2b438460e78f97c897e75861f5

SHA256
4750b53054697c5ff9a8b607efb24934d65e3ef64f53f8dd2035e3077b4b5aa8

SHA512
512da42dc48c0e125291b32b8e2211c569560df519ce7402c5af2d0c2f14d2cca31039020744964fa27a338df207d807a1f8ca7b8c86a383ba272de63296eaa1

Download Submit
\Users\Public\vbc.exe
MD5
faac2c95032da4670594905c19fa95f4

SHA1
d270eaa71182af2b438460e78f97c897e75861f5

SHA256
4750b53054697c5ff9a8b607efb24934d65e3ef64f53f8dd2035e3077b4b5aa8

SHA512
512da42dc48c0e125291b32b8e2211c569560df519ce7402c5af2d0c2f14d2cca31039020744964fa27a338df207d807a1f8ca7b8c86a383ba272de63296eaa1

Download Submit
\Users\Public\vbc.exe
MD5
faac2c95032da4670594905c19fa95f4

SHA1
d270eaa71182af2b438460e78f97c897e75861f5

SHA256
4750b53054697c5ff9a8b607efb24934d65e3ef64f53f8dd2035e3077b4b5aa8

SHA512
512da42dc48c0e125291b32b8e2211c569560df519ce7402c5af2d0c2f14d2cca31039020744964fa27a338df207d807a1f8ca7b8c86a383ba272de63296eaa1

Download Submit
\Users\Public\vbc.exe
MD5
faac2c95032da4670594905c19fa95f4

SHA1
d270eaa71182af2b438460e78f97c897e75861f5

SHA256
4750b53054697c5ff9a8b607efb24934d65e3ef64f53f8dd2035e3077b4b5aa8

SHA512
512da42dc48c0e125291b32b8e2211c569560df519ce7402c5af2d0c2f14d2cca31039020744964fa27a338df207d807a1f8ca7b8c86a383ba272de63296eaa1

Download Submit
\Users\Public\vbc.exe
MD5
faac2c95032da4670594905c19fa95f4

SHA1
d270eaa71182af2b438460e78f97c897e75861f5

SHA256
4750b53054697c5ff9a8b607efb24934d65e3ef64f53f8dd2035e3077b4b5aa8

SHA512
512da42dc48c0e125291b32b8e2211c569560df519ce7402c5af2d0c2f14d2cca31039020744964fa27a338df207d807a1f8ca7b8c86a383ba272de63296eaa1

Download Submit
memory/272-68-0x0000000000000000-mapping.dmp

Download
memory/272-72-0x0000000000A30000-0x0000000000A31000-memory.dmp

Filesize
4KB

Download
memory/272-73-0x0000000000A31000-0x0000000000A32000-memory.dmp

Filesize
4KB

Download
memory/808-86-0x0000000000870000-0x0000000000886000-memory.dmp

Filesize
88KB

Download
memory/808-88-0x0000000001E20000-0x0000000002123000-memory.dmp

Filesize
3.0MB

Download
memory/808-89-0x0000000001D80000-0x0000000001E13000-memory.dmp

Filesize
588KB

Download
memory/808-87-0x0000000000080000-0x00000000000AE000-memory.dmp

Filesize
184KB

Download
memory/808-84-0x0000000000000000-mapping.dmp

Download
memory/1220-83-0x0000000003EB0000-0x0000000003F6D000-memory.dmp

Filesize
756KB

Download
memory/1220-90-0x00000000070B0000-0x0000000007227000-memory.dmp

Filesize
1.5MB

Download
memory/1348-76-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1348-61-0x0000000070A21000-0x0000000070A23000-memory.dmp

Filesize
8KB

Download
memory/1348-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1348-60-0x0000000072FA1000-0x0000000072FA4000-memory.dmp

Filesize
12KB

Download
memory/1600-85-0x0000000000000000-mapping.dmp

Download
memory/1608-74-0x0000000000000000-mapping.dmp

Download
memory/1608-75-0x000007FEFC4A1000-0x000007FEFC4A3000-memory.dmp

Filesize
8KB

Download
memory/1796-81-0x00000000008F0000-0x0000000000BF3000-memory.dmp

Filesize
3.0MB

Download
memory/1796-82-0x00000000002A0000-0x00000000002B4000-memory.dmp

Filesize
80KB

Download
memory/1796-78-0x000000000041EAC0-mapping.dmp

Download
memory/1796-77-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2000-63-0x00000000762C1000-0x00000000762C3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads